/* ── Reset & base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Phosphor green CRT palette */
  --p:          #33ff00;        /* phosphor green — primary text */
  --p-hi:       #99ffaa;        /* bright highlight / changed values */
  --p-dim:      #1a7a00;        /* dim phosphor — muted labels */
  --p-vdim:     #0d4400;        /* very dim — subtle borders */
  --p-glow:     rgba(51,255,0,0.55);
  --amber:      #ffcc00;        /* amber — warnings, changed registers */
  --amber-dim:  rgba(255,204,0,0.14);
  --red:        #ff3a1a;        /* error / wrong */
  --red-dim:    rgba(255,58,26,0.14);
  --screen:     #000800;        /* screen background */
  --surface:    #000e00;        /* slightly lighter panel bg */
  --surface2:   #001500;
  --surface3:   #001c00;
  --border:     #1a4a00;        /* standard border */
  --border-hi:  #2d7700;        /* hover/active border */

  --font:  'VT323', 'Share Tech Mono', monospace;
  --mono:  'Share Tech Mono', 'VT323', monospace;

  /* CRT text-shadow glow recipe */
  --glow-sm: 0 0 6px var(--p-glow);
  --glow:    0 0 8px var(--p-glow), 0 0 18px rgba(51,255,0,0.25);
  --glow-lg: 0 0 10px var(--p-glow), 0 0 22px rgba(51,255,0,0.3), 0 0 40px rgba(51,255,0,0.12);
}

/* Cursor blink */
@keyframes blink {
  0%, 49%  { opacity: 1; }
  50%, 100%{ opacity: 0; }
}

/* Subtle CRT flicker */
@keyframes flicker {
  0%   { opacity: 1; }
  92%  { opacity: 1; }
  93%  { opacity: 0.96; }
  94%  { opacity: 1; }
  96%  { opacity: 0.97; }
  100% { opacity: 1; }
}

/* Phosphor warmup / slide-in */
@keyframes warmup {
  from { opacity: 0; filter: brightness(2) blur(1px); }
  to   { opacity: 1; filter: brightness(1) blur(0); }
}

body {
  background: var(--screen);
  color: var(--p);
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.45;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: warmup 0.6s ease-out both, flicker 8s ease-in-out infinite 1s;
  cursor: default;
}

/* CRT scanlines overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0, 0, 0, 0.10) 2px,
    rgba(0, 0, 0, 0.10) 4px
  );
  z-index: 9999;
}

/* CRT vignette — dark corners */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 95% 90% at 50% 50%,
    transparent 55%,
    rgba(0, 8, 0, 0.45) 85%,
    rgba(0, 4, 0, 0.65) 100%
  );
  z-index: 9998;
}

/* ── Header ────────────────────────────────────────────────────────────────── */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 12px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
  height: 44px;
  position: relative;
}

header::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 1px;
  background: var(--p-vdim);
}

header h1 {
  font-size: 22px;
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow);
  white-space: nowrap;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

/* Blinking cursor after title */
header h1::after {
  content: '▊';
  font-size: 18px;
  animation: blink 1.1s step-end infinite;
  color: var(--p);
  text-shadow: var(--glow-sm);
  margin-left: 3px;
}

.tab-bar {
  display: flex;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  border-left: 1px solid var(--border);
  margin-left: 4px;
  padding-left: 4px;
}
.tab-bar::-webkit-scrollbar { display: none; }

.tab-btn {
  background: transparent;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--p-dim);
  padding: 0 12px;
  height: 44px;
  cursor: pointer;
  font-size: 16px;
  font-family: var(--font);
  letter-spacing: 0.04em;
  transition: color 0.08s, background 0.08s, text-shadow 0.08s;
  white-space: nowrap;
  text-transform: uppercase;
}
.tab-btn:hover {
  color: var(--p);
  background: var(--surface2);
  text-shadow: var(--glow-sm);
}
.tab-btn.active {
  color: var(--screen);
  background: var(--p);
  text-shadow: none;
  font-weight: 400;
}

/* ── Main layout ───────────────────────────────────────────────────────────── */
#main-layout {
  display: grid;
  grid-template-columns: 340px 8px 1fr;
  grid-template-rows: 1fr;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* ── Resize handles ─────────────────────────────────────────────────────────── */
.resize-h, .resize-v {
  flex-shrink: 0;
  background: transparent;
  position: relative;
  z-index: 10;
  transition: background .15s;
}
.resize-h { width: 8px; cursor: col-resize; }
.resize-v { height: 8px; cursor: row-resize; }

.resize-h:hover, .resize-h.dragging { background: rgba(51,255,0,0.05); }
.resize-v:hover, .resize-v.dragging { background: rgba(51,255,0,0.05); }

.resize-h::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0; left: 3px;
  width: 1px;
  background: var(--border);
  transition: background .15s, box-shadow .15s;
}
.resize-v::after {
  content: '';
  position: absolute;
  left: 0; right: 0; top: 3px;
  height: 1px;
  background: var(--border);
  transition: background .15s, box-shadow .15s;
}
.resize-h:hover::after, .resize-h.dragging::after {
  background: var(--p);
  box-shadow: var(--glow-sm);
}
.resize-v:hover::after, .resize-v.dragging::after {
  background: var(--p);
  box-shadow: var(--glow-sm);
}

/* Quiz replaces main-layout when active */
#quiz-wrap {
  display: none;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ── Left panel — lesson content ───────────────────────────────────────────── */
#lesson-panel {
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 16px 14px 24px;
  gap: 18px;
}

#lesson-title {
  font-size: 22px;
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow);
  line-height: 1.2;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}

.lesson-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 26px;
  border: 1px solid var(--p);
  color: var(--p);
  text-shadow: var(--glow-sm);
  box-shadow: var(--glow-sm), inset 0 0 8px rgba(51,255,0,0.06);
  font-size: 18px;
  font-family: var(--font);
  font-weight: 400;
  flex-shrink: 0;
  padding: 0 4px;
}

#lesson-intro {
  color: var(--p-dim);
  line-height: 1.6;
  font-size: 17px;
  font-weight: 400;
  border-left: 2px solid var(--border);
  padding-left: 10px;
}

/* Section labels */
.section-label {
  font-size: 15px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--p-dim);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-label::before {
  content: '►';
  color: var(--p-dim);
  font-size: 12px;
}

/* Concepts */
#concepts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#concepts-list li {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 2px solid var(--border-hi);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  transition: border-color 0.1s, box-shadow 0.1s;
  font-size: 16px;
  line-height: 1.5;
  color: var(--p-dim);
}
#concepts-list li:hover {
  border-color: var(--border-hi);
  border-left-color: var(--p);
  box-shadow: inset 0 0 12px rgba(51,255,0,0.04);
}

#concepts-list strong {
  display: block;
  color: var(--amber);
  text-shadow: 0 0 8px rgba(255,204,0,0.5);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.concept-desc {
  display: block;
  font-size: 15px;
  color: var(--p-dim);
  line-height: 1.5;
}

/* Diagram */
#diagram-pre {
  background: var(--screen);
  border: 1px solid var(--border);
  padding: 12px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--p-dim);
  overflow-x: auto;
  line-height: 1.6;
  white-space: pre;
}

/* Endian-explorer widget (lesson 13) */
.endian-widget {
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}
.endian-input-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.endian-input-row label {
  color: var(--p-dim);
  font-size: 14px;
  letter-spacing: 0.05em;
}
#endian-input {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--p);
  font-family: var(--font);
  font-size: 15px;
  padding: 4px 8px;
  min-width: 160px;
}
#endian-input:focus {
  outline: none;
  border-color: var(--p);
  box-shadow: var(--glow-sm);
}
.endian-error {
  color: #e44;
  font-size: 13px;
}
.endian-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 900px) {
  .endian-grid { grid-template-columns: 1fr 1fr; }
}
.endian-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.endian-label {
  color: var(--p-dim);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.endian-row {
  display: flex;
  gap: 4px;
}
.endian-cell {
  flex: 1;
  text-align: center;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 6px 4px;
  font-family: var(--font);
}
.endian-addr  { font-size: 11px; color: var(--p-vdim); }
.endian-byte  { font-size: 18px; color: var(--p); letter-spacing: 0.05em; }
.endian-ascii { font-size: 11px; color: var(--p-vdim); }
.endian-note  { font-size: 12px; color: var(--p-vdim); font-style: italic; }

/* Exercise card */
.exercise-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-top: 1px solid var(--border-hi);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}

.exercise-card::before {
  content: '[ EXERCISE ]';
  position: absolute;
  top: -10px;
  left: 10px;
  background: var(--surface2);
  color: var(--p-dim);
  font-size: 13px;
  letter-spacing: 0.1em;
  padding: 0 4px;
}

#exercise-box {
  font-size: 16px;
  line-height: 1.6;
  color: var(--p-dim);
}

.exercise-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

#hint-btn,
#solution-btn {
  align-self: flex-start;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--p-dim);
  padding: 3px 12px;
  cursor: pointer;
  font-size: 16px;
  font-family: var(--font);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.1s, border-color 0.1s, text-shadow 0.1s;
}
#hint-btn:hover,
#solution-btn:hover {
  color: var(--p);
  border-color: var(--p);
  text-shadow: var(--glow-sm);
}

#hint-box {
  font-size: 16px;
  color: var(--amber);
  text-shadow: 0 0 8px rgba(255,204,0,0.45);
  font-family: var(--mono);
  border-top: 1px solid var(--border);
  padding-top: 8px;
  line-height: 1.6;
}

.solution-box {
  margin: 0;
  font-size: 14px;
  color: var(--p);
  font-family: var(--mono);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 10px;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 320px;
  overflow: auto;
  background: rgba(0, 0, 0, 0.2);
}

/* ── Right panel ───────────────────────────────────────────────────────────── */
#right-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

#editor-area {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

#editor-toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

/* Buttons — DOS bracket style */
.btn {
  padding: 3px 14px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 17px;
  font-family: var(--font);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.08s, border-color 0.08s, background 0.08s, text-shadow 0.08s, box-shadow 0.08s;
  background: transparent;
  color: var(--p-dim);
  position: relative;
}
.btn:hover:not(:disabled) {
  color: var(--p);
  border-color: var(--p);
  text-shadow: var(--glow-sm);
  box-shadow: var(--glow-sm);
}
.btn-primary {
  color: var(--screen);
  background: var(--p);
  border-color: var(--p);
  box-shadow: var(--glow-sm);
  font-weight: 400;
}
.btn-primary:hover:not(:disabled) {
  background: var(--p-hi);
  border-color: var(--p-hi);
  box-shadow: var(--glow);
  color: var(--screen);
  text-shadow: none;
}
.btn-secondary {
  color: var(--p-dim);
  border-color: var(--border);
}
.btn:disabled {
  opacity: 0.2;
  cursor: not-allowed;
}

#step-counter {
  margin-left: auto;
  font-size: 16px;
  color: var(--p-dim);
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

#error-banner {
  display: none;
  background: var(--red-dim);
  border-bottom: 1px solid rgba(255,58,26,0.35);
  color: var(--red);
  padding: 5px 12px;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.02em;
}

/* ── State panels ──────────────────────────────────────────────────────────── */
#state-area {
  display: grid;
  grid-template-columns: 260px 8px 200px 8px 1fr;
  grid-template-rows: 1fr;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.state-section {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.state-scroll {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

.state-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 5px 10px;
  font-size: 16px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--p-dim);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.state-header::before {
  content: '─';
  color: var(--border-hi);
}

/* ── Registers table ───────────────────────────────────────────────────────── */
#reg-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 14px;
}

#reg-table tr { border-bottom: 1px solid var(--p-vdim); }
#reg-table tr:last-child { border-bottom: none; }
#reg-table tr.changed { background: var(--amber-dim); }
#reg-table tr.changed .reg-name {
  color: var(--amber);
  text-shadow: 0 0 8px rgba(255,204,0,0.5);
}
#reg-table tr.changed .reg-hex {
  color: var(--p-hi);
  text-shadow: var(--glow-sm);
}

#reg-table td { padding: 5px 8px; }
.reg-name {
  color: var(--amber);
  font-weight: 400;
  width: 38px;
  font-size: 14px;
  text-shadow: 0 0 6px rgba(255,204,0,0.4);
}
.reg-hex  { color: var(--p);     font-size: 13px; letter-spacing: 0.04em; }
.reg-dec  { color: var(--p-dim); text-align: right; width: 60px; font-size: 13px; }

/* ── Flags ─────────────────────────────────────────────────────────────────── */
#flag-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 8px;
  align-content: start;
  flex-shrink: 0;
}

.flag {
  font-family: var(--mono);
  font-size: 13px;
  padding: 4px 6px;
  border: 1px solid var(--p-vdim);
  font-weight: 400;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  transition: all 0.1s;
  cursor: help;
}

.flag-set {
  color: var(--p);
  border-color: var(--border-hi);
  background: rgba(51,255,0,0.07);
  text-shadow: var(--glow-sm);
  box-shadow: inset 0 0 8px rgba(51,255,0,0.08);
}

.flag-clear {
  color: var(--p-vdim);
  background: transparent;
}

.flag.changed {
  border-color: var(--amber);
  box-shadow: 0 0 6px rgba(255,204,0,0.3);
}

.flag-name { font-weight: 400; }
.flag-val  { font-size: 12px; opacity: 0.8; }

/* Floating tooltip for #flag-bar (appended to body) */
#flag-tooltip.flag-tooltip {
  position: fixed;
  z-index: 10050;
  max-width: 280px;
  padding: 10px 12px;
  font-family: var(--font);
  font-size: 13px;
  line-height: 1.45;
  color: var(--p);
  background: var(--surface2);
  border: 1px solid var(--border-hi);
  border-radius: 4px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
  pointer-events: none;
}

/* ── Stack panel ───────────────────────────────────────────────────────────── */
#stack-panel {
  padding: 6px 8px;
  font-family: var(--mono);
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.empty-note {
  color: var(--p-vdim);
  font-size: 14px;
  padding: 4px 0;
}

.stack-row {
  display: flex;
  gap: 6px;
  align-items: baseline;
  padding: 2px 3px;
}
.stack-row.stack-top {
  background: rgba(51,255,0,0.07);
  border-left: 2px solid var(--p);
  padding-left: 5px;
}
.stack-addr  { color: var(--p-dim); min-width: 52px; font-size: 12px; }
.stack-val   { color: var(--p); font-size: 13px; }
.stack-label {
  color: var(--amber);
  text-shadow: 0 0 6px rgba(255,204,0,0.4);
  font-size: 12px;
  margin-left: auto;
}

/* stdout */
.stdout-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--p-dim);
  margin-bottom: 3px;
  margin-top: 2px;
}
.stdout-line {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--p);
  white-space: pre-wrap;
  word-break: break-all;
  background: rgba(51,255,0,0.06);
  border-left: 2px solid var(--border-hi);
  padding: 2px 5px;
  margin-bottom: 2px;
}
.stdout-exit { font-size: 12px; color: var(--p-dim); margin-top: 3px; }
.stack-sep   { border: none; border-top: 1px solid var(--p-vdim); margin: 6px 0; }

/* ── Execution Log ─────────────────────────────────────────────────────────── */
#step-log {
  padding: 6px 8px;
  font-family: var(--mono);
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.log-entry {
  line-height: 1.55;
  padding: 1px 4px;
  color: var(--p-dim);
}
.log-entry::before { content: '> '; color: var(--border-hi); }

.log-info  {
  color: var(--p-vdim);
  font-size: 12px;
  font-style: italic;
}
.log-info::before { content: ''; }

.log-warn  {
  color: var(--amber);
  background: var(--amber-dim);
  padding: 2px 5px;
  text-shadow: 0 0 6px rgba(255,204,0,0.3);
}
.log-error {
  color: var(--red);
  background: var(--red-dim);
  padding: 2px 5px;
}

/* ── CodeMirror — retro CRT theme ──────────────────────────────────────────*/
#editor-host { flex: 1; overflow: hidden; }

.cm-s-nasm-dark.CodeMirror {
  background: var(--screen);
  color: var(--p);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 20px;
  height: 100%;
  border: none;
}

.cm-s-nasm-dark .CodeMirror-gutters {
  background: var(--surface);
  border-right: 1px solid var(--border);
}

.cm-s-nasm-dark .CodeMirror-linenumber {
  color: var(--p-vdim);
  padding: 0 8px;
  font-size: 12px;
}
.cm-s-nasm-dark .CodeMirror-cursor {
  border-left: 2px solid var(--p);
  box-shadow: 0 0 8px var(--p-glow);
}
.cm-s-nasm-dark .CodeMirror-selected,
.cm-s-nasm-dark .CodeMirror-focused .CodeMirror-selected {
  background: rgba(51,255,0,0.12);
}
.cm-s-nasm-dark .CodeMirror-matchingbracket {
  color: var(--amber) !important;
  font-weight: bold;
  text-shadow: 0 0 6px rgba(255,204,0,0.5);
}

/* Token colours */
.cm-s-nasm-dark .cm-comment    { color: #1a5a00; font-style: italic; }
.cm-s-nasm-dark .cm-string     { color: #6aaa44; }
.cm-s-nasm-dark .cm-number,
.cm-s-nasm-dark .cm-atom       { color: #55cc88; }
.cm-s-nasm-dark .cm-keyword    { color: var(--p); text-shadow: var(--glow-sm); font-weight: 400; }  /* instructions */
.cm-s-nasm-dark .cm-variable-2 { color: var(--amber); text-shadow: 0 0 6px rgba(255,204,0,0.4); } /* registers */
.cm-s-nasm-dark .cm-def        { color: #aaffaa; font-weight: 400; }           /* labels */
.cm-s-nasm-dark .cm-meta       { color: #4a8822; font-weight: 400; }           /* directives */
.cm-s-nasm-dark .cm-type       { color: #44aa77; }                              /* byte/word/dword */
.cm-s-nasm-dark .cm-variable   { color: var(--p-dim); }
.cm-s-nasm-dark .cm-operator   { color: var(--border-hi); }

/* Active step highlight */
.cm-s-nasm-dark .cm-active-step {
  background: rgba(51,255,0,0.09) !important;
  border-left: 2px solid var(--p);
  box-shadow: inset 0 0 20px rgba(51,255,0,0.06);
}

/* ── Scrollbars ──────────────────────────────────────────────────────────────*/
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: var(--screen); }
::-webkit-scrollbar-thumb { background: var(--border); }
::-webkit-scrollbar-thumb:hover { background: var(--border-hi); }

/* ── Quiz layout ─────────────────────────────────────────────────────────────*/
#quiz-wrap {
  display: none;
  flex-direction: row;
}

#quiz-sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#quiz-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#quiz-lesson-tag {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--p-dim);
}

#quiz-progress-n {
  font-size: 34px;
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow);
  font-family: var(--font);
  letter-spacing: 0.02em;
}

.quiz-progress-track {
  height: 10px;
  background: var(--surface3);
  border: 1px solid var(--border);
  overflow: hidden;
}

#quiz-progress {
  height: 100%;
  background: var(--p);
  box-shadow: var(--glow-sm);
  transition: width 0.35s ease;
  width: 0%;
}

#quiz-score-live {
  font-size: 15px;
  color: var(--p-dim);
  font-family: var(--mono);
}

#quiz-main {
  flex: 1;
  overflow-y: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 28px;
}

#quiz-card {
  width: 100%;
  max-width: 660px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

#quiz-q {
  font-size: 20px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--p);
  text-shadow: var(--glow-sm);
  letter-spacing: 0.02em;
}

#quiz-code {
  background: var(--screen);
  border: 1px solid var(--border);
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--p);
  white-space: pre;
  overflow-x: auto;
}

#quiz-opts {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.quiz-opt {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--p-dim);
  padding: 10px 14px;
  text-align: left;
  font-size: 18px;
  font-family: var(--font);
  cursor: pointer;
  transition: border-color .1s, background .1s, color .1s, text-shadow .1s;
  line-height: 1.45;
  letter-spacing: 0.03em;
}
.quiz-opt:hover:not(:disabled) {
  border-color: var(--p);
  background: rgba(51,255,0,0.06);
  color: var(--p);
  text-shadow: var(--glow-sm);
}
.quiz-opt:disabled { cursor: default; }
.quiz-opt.opt-correct {
  border-color: var(--p);
  background: rgba(51,255,0,0.09);
  color: var(--p);
  text-shadow: var(--glow-sm);
}
.quiz-opt.opt-wrong {
  border-color: var(--red);
  background: var(--red-dim);
  color: var(--red);
}

#quiz-input {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

#quiz-input label {
  font-family: var(--mono);
  color: var(--amber);
  font-size: 16px;
  text-shadow: 0 0 6px rgba(255,204,0,0.4);
}

#quiz-input input {
  background: var(--screen);
  border: 1px solid var(--border);
  color: var(--p);
  font-family: var(--mono);
  font-size: 16px;
  padding: 6px 10px;
  width: 200px;
  outline: none;
  transition: border-color .1s, box-shadow .1s;
  caret-color: var(--p);
}
#quiz-input input:focus {
  border-color: var(--p);
  box-shadow: var(--glow-sm);
}
#quiz-input input.input-error { border-color: var(--red); }

.quiz-feedback {
  border: 1px solid;
  padding: 12px 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 17px;
  font-family: var(--font);
}
.quiz-feedback.hidden  { display: none; }
.quiz-feedback.correct {
  background: rgba(51,255,0,0.07);
  border-color: var(--border-hi);
  color: var(--p);
}
.quiz-feedback.wrong {
  background: var(--red-dim);
  border-color: rgba(255,58,26,0.35);
  color: var(--red);
}

.fb-icon  { font-size: 20px; font-weight: 700; flex-shrink: 0; line-height: 1.4; }
.fb-label { font-weight: 400; font-size: 18px; flex-shrink: 0; line-height: 1.6; }
.fb-explain { font-size: 16px; line-height: 1.6; flex-basis: 100%; margin: 0; }
.quiz-feedback.correct .fb-explain { color: var(--p-dim); }
.quiz-feedback.wrong   .fb-explain { color: var(--red); opacity: 0.8; }

#quiz-nav { display: flex; justify-content: flex-end; }

#quiz-results {
  width: 100%;
  max-width: 660px;
  flex-direction: column;
  gap: 18px;
  align-items: center;
}

.result-score {
  font-size: 88px;
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow-lg);
  font-family: var(--font);
  line-height: 1;
  letter-spacing: 0.02em;
}
.result-score span { font-size: 44px; color: var(--p-dim); }
.result-pct   { font-size: 22px; color: var(--p); font-weight: 400; text-shadow: var(--glow-sm); }
.result-grade { font-size: 17px; color: var(--p-dim); }

.result-breakdown {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 8px;
}

.result-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 10px;
  border: 1px solid var(--p-vdim);
  background: var(--surface);
  font-size: 16px;
}
.result-row.row-ok  { border-color: var(--border); }
.result-row.row-bad { border-color: rgba(255,58,26,.25); }

.row-icon { font-weight: 700; flex-shrink: 0; width: 16px; }
.result-row.row-ok  .row-icon { color: var(--p); }
.result-row.row-bad .row-icon { color: var(--red); }
.row-text   { flex: 1; font-size: 16px; color: var(--p-dim); }
.row-lesson { font-size: 13px; color: var(--p-vdim); white-space: nowrap; font-family: var(--mono); }

/* Quiz tab */
.tab-btn.quiz-tab.active { color: var(--screen); background: var(--amber); text-shadow: none; }

/* ── Gym layout ──────────────────────────────────────────────────────────────*/
#gym-wrap {
  display: none;
  flex-direction: row;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

#gym-sidebar {
  width: 180px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

#gym-sidebar-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#gym-sidebar-workout {
  font-size: 18px;
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.gym-stat-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--p-dim);
  margin-bottom: 2px;
}

.gym-rep-num {
  font-size: 28px;
  font-family: var(--font);
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow-sm);
  letter-spacing: 0.02em;
}

.gym-streak-val {
  font-size: 42px;
  font-family: var(--font);
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow);
  letter-spacing: 0.02em;
  transition: color 0.2s, text-shadow 0.2s;
}

.gym-streak-val.heating {
  color: var(--amber);
  text-shadow: 0 0 10px rgba(255,204,0,0.6), 0 0 22px rgba(255,204,0,0.3);
}
.gym-streak-val.on-fire {
  color: var(--red);
  text-shadow: 0 0 10px rgba(255,58,26,0.7), 0 0 22px rgba(255,58,26,0.4);
  animation: pulse-fire .5s ease infinite alternate;
}

@keyframes pulse-fire { from { opacity:1; } to { opacity:.65; } }

#gym-main {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

/* ── Workout menu ────────────────────────────────────────────────────────────*/
#gym-menu {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
  padding: 28px;
  align-content: start;
}

.gym-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
  cursor: pointer;
  transition: border-color .12s, background .12s, box-shadow .12s;
  color: inherit;
  font-family: var(--font);
  position: relative;
}

.gym-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--border);
  transition: background .12s, box-shadow .12s;
}

.gym-card:hover {
  border-color: var(--p);
  background: var(--surface2);
  box-shadow: 0 0 12px rgba(51,255,0,0.08), inset 0 0 20px rgba(51,255,0,0.04);
}
.gym-card:hover::before {
  background: var(--p);
  box-shadow: var(--glow-sm);
}

.gym-card-icon { font-size: 20px; line-height: 1; margin-bottom: 4px; }
.gym-card-name {
  font-size: 19px;
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.gym-card-desc { font-size: 15px; color: var(--p-dim); line-height: 1.45; }
.gym-card-meta { font-size: 13px; color: var(--p-vdim); font-family: var(--mono); margin-top: 4px; }

/* ── Drill area ──────────────────────────────────────────────────────────────*/
#gym-drill-area {
  flex: 1;
  flex-direction: column;
  align-items: center;
  padding: 24px 28px;
  gap: 20px;
  overflow-y: auto;
}

#gym-timer-wrap {
  width: 100%;
  max-width: 660px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

#gym-timer-track {
  flex: 1;
  height: 8px;
  background: var(--surface3);
  border: 1px solid var(--border);
  overflow: hidden;
}

#gym-timer-fill {
  height: 100%;
  width: 100%;
  background: var(--p);
  box-shadow: var(--glow-sm);
}

#gym-timer-label {
  font-size: 14px;
  font-family: var(--mono);
  color: var(--p-dim);
  min-width: 28px;
  text-align: right;
}

@keyframes gym-shrink { from { width: 100%; } to { width: 0%; } }

@keyframes gym-heat {
  0%   { background: var(--p);    box-shadow: var(--glow-sm); }
  50%  { background: var(--amber); box-shadow: 0 0 8px rgba(255,204,0,0.6); }
  100% { background: var(--red);  box-shadow: 0 0 8px rgba(255,58,26,0.6); }
}

#gym-question-wrap {
  width: 100%;
  max-width: 660px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#gym-category-tag {
  font-size: 13px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: .15em;
  color: var(--p-dim);
  font-family: var(--mono);
}

#gym-question {
  font-size: 22px;
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow-sm);
  line-height: 1.5;
  letter-spacing: 0.02em;
}

#gym-question code {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--amber);
  text-shadow: 0 0 6px rgba(255,204,0,0.4);
  padding: 0 3px;
}

#gym-drill-code {
  background: var(--screen);
  border: 1px solid var(--border);
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--p);
  white-space: pre;
  overflow-x: auto;
  width: 100%;
  max-width: 660px;
}

#gym-mc-area {
  width: 100%;
  max-width: 660px;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.gym-opt {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--p-dim);
  padding: 10px 12px;
  text-align: left;
  font-size: 18px;
  font-family: var(--font);
  cursor: pointer;
  transition: border-color .1s, background .1s, color .1s, text-shadow .1s;
  line-height: 1.45;
  letter-spacing: 0.03em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.gym-opt:hover:not(:disabled) {
  border-color: var(--p);
  background: rgba(51,255,0,0.06);
  color: var(--p);
  text-shadow: var(--glow-sm);
}

.gym-opt:disabled { cursor: default; }
.gym-opt.gym-opt-correct {
  border-color: var(--p);
  background: rgba(51,255,0,0.09);
  color: var(--p);
  text-shadow: var(--glow-sm);
}
.gym-opt.gym-opt-wrong {
  border-color: var(--red);
  background: var(--red-dim);
  color: var(--red);
}

.gym-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--border-hi);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--p-dim);
  flex-shrink: 0;
}

#gym-type-area {
  width: 100%;
  max-width: 660px;
  align-items: center;
  gap: 12px;
}

.gym-type-label {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--amber);
  text-shadow: 0 0 6px rgba(255,204,0,0.4);
  font-weight: 400;
}

.gym-type-inp {
  background: var(--screen);
  border: 1px solid var(--border);
  color: var(--p);
  font-family: var(--mono);
  font-size: 18px;
  padding: 8px 12px;
  width: 180px;
  outline: none;
  transition: border-color .1s, box-shadow .1s;
  caret-color: var(--p);
}

.gym-type-inp:focus {
  border-color: var(--p);
  box-shadow: var(--glow-sm);
}

.gym-type-inp.gym-inp-error   { border-color: var(--red); }
.gym-type-inp.gym-inp-correct {
  border-color: var(--p);
  background: rgba(51,255,0,0.06);
}
.gym-type-inp.gym-inp-wrong {
  border-color: var(--red);
  background: var(--red-dim);
}

.gym-feedback {
  width: 100%;
  max-width: 660px;
  border: 1px solid;
  padding: 12px 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 17px;
  font-family: var(--font);
}

.gym-feedback.hidden  { display: none; }
.gym-feedback.correct {
  background: rgba(51,255,0,0.07);
  border-color: var(--border-hi);
  color: var(--p);
}
.gym-feedback.wrong {
  background: var(--red-dim);
  border-color: rgba(255,58,26,0.35);
  color: var(--red);
}

.gym-feedback .fb-icon { font-size: 18px; font-weight: 700; flex-shrink: 0; line-height: 1.4; }
.gym-feedback strong   { font-weight: 400; font-size: 18px; flex-shrink: 0; line-height: 1.6; }
.gym-feedback.correct strong { color: var(--p); }
.gym-feedback.wrong   strong { color: var(--red); }

.gym-feedback code {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--amber);
  padding: 0 3px;
}

#gym-nav {
  width: 100%;
  max-width: 660px;
  display: flex;
  justify-content: flex-end;
}

#gym-results {
  flex-direction: column;
  gap: 18px;
  align-items: center;
  padding: 44px 28px;
  align-self: flex-start;
  width: 100%;
}

.gym-res-score {
  font-size: 96px;
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow-lg);
  font-family: var(--font);
  line-height: 1;
  letter-spacing: 0.02em;
}
.gym-res-score span  { font-size: 48px; color: var(--p-dim); }
.gym-res-pct         { font-size: 24px; color: var(--p); font-weight: 400; text-shadow: var(--glow-sm); }
.gym-res-grade       { font-size: 18px; color: var(--p-dim); }

.gym-res-stats {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

.gym-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 12px 22px;
  font-size: 13px;
  color: var(--p-dim);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-family: var(--font);
}

.gym-stat span {
  font-size: 28px;
  font-family: var(--font);
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow-sm);
  letter-spacing: 0.02em;
}

.gym-res-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

/* Gym tab */
.tab-btn.gym-tab.active { color: var(--screen); background: var(--p); text-shadow: none; }

/* Theme toggle button */
#theme-btn {
  flex-shrink: 0;
  margin-left: auto;
  font-size: 15px;
  white-space: nowrap;
  letter-spacing: 0.08em;
}

/* ══════════════════════════════════════════════════════════════════════════════
   CYBERPUNK THEME
   Neon noir — deep purple-black city, cyan + hot-pink neons, chromatic glitch
   ══════════════════════════════════════════════════════════════════════════════ */

@keyframes cyber-glitch {
  0%, 85%, 100% { text-shadow: var(--glow); transform: none; }
  86% { text-shadow: 2px 0 var(--amber), -2px 0 var(--p), 0 0 12px var(--p-glow); transform: translate(-2px, 0); }
  87% { text-shadow: -2px 0 var(--amber),  2px 0 var(--p), 0 0 12px var(--p-glow); transform: translate(2px, 0); }
  88% { text-shadow: var(--glow); transform: none; }
  93% { text-shadow: 1px 0 var(--amber), -1px 0 var(--p), 0 0 10px var(--p-glow); }
  94% { text-shadow: var(--glow); }
}

@keyframes neon-pulse {
  0%, 100% { box-shadow: 0 0 8px rgba(0,229,255,0.2),  inset 0 0 20px rgba(0,229,255,0.03); }
  50%       { box-shadow: 0 0 14px rgba(0,229,255,0.4), inset 0 0 28px rgba(0,229,255,0.06); }
}

/* ── Variable overrides ────────────────────────────────────────────────────── */
body[data-theme="cyberpunk"] {
  --p:          #00e5ff;
  --p-hi:       #80f2ff;
  --p-dim:      #006677;
  --p-vdim:     #003344;
  --p-glow:     rgba(0,229,255,0.6);
  --amber:      #ff2d78;
  --amber-dim:  rgba(255,45,120,0.15);
  --red:        #ff4455;
  --red-dim:    rgba(255,68,85,0.15);
  --screen:     #070010;
  --surface:    #0c0018;
  --surface2:   #110022;
  --surface3:   #180030;
  --border:     #280048;
  --border-hi:  #5500aa;
  --glow-sm:    0 0 8px rgba(0,229,255,0.65);
  --glow:       0 0 10px rgba(0,229,255,0.6), 0 0 22px rgba(0,229,255,0.28), 0 0 1px rgba(255,45,120,0.35);
  --glow-lg:    0 0 12px rgba(0,229,255,0.7), 0 0 30px rgba(0,229,255,0.32), 0 0 60px rgba(0,229,255,0.14), 0 0 2px rgba(255,45,120,0.5);
  --font:       'Orbitron', 'Share Tech Mono', monospace;
  --mono:       'Share Tech Mono', monospace;

  /* Orbitron is wider — scale down base size */
  font-size: 13px;

  /* Holographic grid background */
  background-color: var(--screen);
  background-image:
    linear-gradient(rgba(0,229,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.035) 1px, transparent 1px);
  background-size: 48px 48px;

  /* No flicker in cyberpunk */
  animation: warmup 0.8s ease-out both;
}

/* Cyberpunk scanlines — blue-tinted, looser */
body[data-theme="cyberpunk"]::after {
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px, transparent 3px,
    rgba(0, 0, 24, 0.12) 3px, rgba(0, 0, 24, 0.12) 4px
  );
}

/* Cyberpunk vignette — purple corners */
body[data-theme="cyberpunk"]::before {
  background: radial-gradient(ellipse 100% 100% at 50% 50%,
    transparent 42%,
    rgba(24, 0, 48, 0.48) 80%,
    rgba(10, 0, 24, 0.68) 100%
  );
}

/* ── Header ────────────────────────────────────────────────────────────────── */
body[data-theme="cyberpunk"] header {
  border-bottom-color: var(--border-hi);
  box-shadow: 0 1px 0 rgba(0,229,255,0.08), 0 2px 16px rgba(0,0,24,0.6);
}

body[data-theme="cyberpunk"] header h1 {
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  animation: cyber-glitch 7s ease-in-out infinite;
}

/* Swap blinking block cursor → magenta underscore in cyberpunk */
body[data-theme="cyberpunk"] header h1::after {
  content: '_';
  color: var(--amber);
  text-shadow: 0 0 10px rgba(255,45,120,0.8);
  animation: blink 0.7s step-end infinite;
  font-size: 16px;
  margin-left: 3px;
}

/* ── Tabs ──────────────────────────────────────────────────────────────────── */
body[data-theme="cyberpunk"] .tab-btn {
  font-size: 10px;
  letter-spacing: 0.1em;
  border-right-color: var(--border);
}
body[data-theme="cyberpunk"] .tab-btn:hover {
  background: rgba(0,229,255,0.06);
  text-shadow: var(--glow-sm);
}
body[data-theme="cyberpunk"] .tab-btn.active {
  color: var(--p);
  background: rgba(0,229,255,0.10);
  text-shadow: var(--glow-sm);
  border-bottom: 2px solid var(--p);
  box-shadow: 0 2px 8px rgba(0,229,255,0.25);
}
body[data-theme="cyberpunk"] .tab-btn.quiz-tab.active {
  color: var(--amber);
  background: rgba(255,45,120,0.10);
  border-bottom-color: var(--amber);
  box-shadow: 0 2px 8px rgba(255,45,120,0.3);
  text-shadow: 0 0 8px rgba(255,45,120,0.6);
}
body[data-theme="cyberpunk"] .tab-btn.gym-tab.active {
  color: var(--p);
  background: rgba(0,229,255,0.10);
  text-shadow: var(--glow-sm);
  border-bottom-color: var(--p);
}

/* ── Theme button in cyberpunk ─────────────────────────────────────────────── */
body[data-theme="cyberpunk"] #theme-btn {
  font-size: 10px;
  letter-spacing: 0.14em;
  border-color: var(--amber);
  color: var(--amber);
  text-shadow: 0 0 8px rgba(255,45,120,0.55);
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 5px, 100% 100%, 5px 100%, 0 calc(100% - 5px));
}
body[data-theme="cyberpunk"] #theme-btn:hover {
  background: rgba(255,45,120,0.10);
  box-shadow: 0 0 12px rgba(255,45,120,0.4);
  color: var(--amber);
  border-color: var(--amber);
}

/* ── Buttons — angled corners ──────────────────────────────────────────────── */
body[data-theme="cyberpunk"] .btn {
  font-size: 11px;
  letter-spacing: 0.12em;
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 7px 100%, 0 calc(100% - 7px));
  border-radius: 0;
}
body[data-theme="cyberpunk"] .btn-primary {
  background: var(--amber);
  color: #06000e;
  border-color: var(--amber);
  box-shadow: 0 0 14px rgba(255,45,120,0.65), 0 0 28px rgba(255,45,120,0.28);
  text-shadow: none;
}
body[data-theme="cyberpunk"] .btn-primary:hover:not(:disabled) {
  background: #ff5599;
  border-color: #ff5599;
  box-shadow: 0 0 18px rgba(255,45,120,0.85), 0 0 36px rgba(255,45,120,0.38);
  color: #06000e;
  text-shadow: none;
}
body[data-theme="cyberpunk"] .btn-secondary:hover:not(:disabled) {
  border-color: var(--p);
  color: var(--p);
  background: rgba(0,229,255,0.08);
  box-shadow: var(--glow-sm);
}

/* ── Section label icon ────────────────────────────────────────────────────── */
body[data-theme="cyberpunk"] .section-label::before {
  content: '//';
  font-family: var(--mono);
  font-size: 11px;
}

/* ── Lesson panel text sizes ───────────────────────────────────────────────── */
body[data-theme="cyberpunk"] #lesson-title    { font-size: 15px; letter-spacing: 0.12em; }
body[data-theme="cyberpunk"] .lesson-num      { font-size: 13px; min-width: 28px; }
body[data-theme="cyberpunk"] #lesson-intro    { font-size: 13px; }
body[data-theme="cyberpunk"] #concepts-list li  { font-size: 13px; }
body[data-theme="cyberpunk"] .concept-desc    { font-size: 12px; }
body[data-theme="cyberpunk"] .section-label   { font-size: 11px; }
body[data-theme="cyberpunk"] #exercise-box    { font-size: 13px; }
body[data-theme="cyberpunk"] #hint-btn,
body[data-theme="cyberpunk"] #solution-btn    { font-size: 12px; letter-spacing: 0.1em; clip-path: none; }
body[data-theme="cyberpunk"] #hint-box        { font-size: 13px; }
body[data-theme="cyberpunk"] .solution-box    { font-size: 12px; }
body[data-theme="cyberpunk"] .exercise-card::before { font-size: 10px; letter-spacing: 0.14em; }

/* ── Concepts: amber is now magenta ────────────────────────────────────────── */
body[data-theme="cyberpunk"] #concepts-list strong {
  text-shadow: 0 0 8px rgba(255,45,120,0.55);
}

/* ── State headers ─────────────────────────────────────────────────────────── */
body[data-theme="cyberpunk"] .state-header    { font-size: 11px; letter-spacing: 0.16em; }

/* ── Registers: changed rows use magenta shadow ────────────────────────────── */
body[data-theme="cyberpunk"] #reg-table tr.changed .reg-name {
  text-shadow: 0 0 8px rgba(255,45,120,0.6);
}
body[data-theme="cyberpunk"] .reg-name {
  text-shadow: 0 0 6px rgba(255,45,120,0.4);
}

/* ── Flags ─────────────────────────────────────────────────────────────────── */
body[data-theme="cyberpunk"] .flag-set {
  background: rgba(0,229,255,0.07);
  border-color: rgba(0,229,255,0.4);
}

/* ── Stack ─────────────────────────────────────────────────────────────────── */
body[data-theme="cyberpunk"] .stack-row.stack-top { background: rgba(0,229,255,0.07); }
body[data-theme="cyberpunk"] .stdout-line { background: rgba(0,229,255,0.06); border-left-color: var(--border-hi); }

/* ── Log ───────────────────────────────────────────────────────────────────── */
body[data-theme="cyberpunk"] .log-entry::before { color: var(--p-dim); }

/* ── CodeMirror retro → cyberpunk ──────────────────────────────────────────── */
body[data-theme="cyberpunk"] .cm-s-nasm-dark.CodeMirror      { background: #050010; }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .CodeMirror-gutters { background: #090018; border-right-color: var(--border); }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .CodeMirror-linenumber { color: var(--p-vdim); }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .CodeMirror-cursor { border-left-color: var(--amber); box-shadow: 0 0 10px rgba(255,45,120,0.7); }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .CodeMirror-selected,
body[data-theme="cyberpunk"] .cm-s-nasm-dark .CodeMirror-focused .CodeMirror-selected { background: rgba(0,229,255,0.12); }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .CodeMirror-matchingbracket { color: var(--p) !important; }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-comment     { color: #3a1660; }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-string      { color: #7799ff; }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-number,
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-atom        { color: #bb77ff; }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-keyword     { color: var(--p); text-shadow: var(--glow-sm); }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-variable-2  { color: var(--amber); text-shadow: 0 0 6px rgba(255,45,120,0.5); }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-def         { color: #ff88bb; }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-meta        { color: #6633aa; }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-type        { color: #44aaff; }
body[data-theme="cyberpunk"] .cm-s-nasm-dark .cm-active-step {
  background: rgba(0,229,255,0.09) !important;
  border-left-color: var(--p);
  box-shadow: inset 0 0 24px rgba(0,229,255,0.06), inset 3px 0 16px rgba(255,45,120,0.04);
}

/* ── Resize handles — cyan glow ────────────────────────────────────────────── */
body[data-theme="cyberpunk"] .resize-h:hover::after,
body[data-theme="cyberpunk"] .resize-h.dragging::after,
body[data-theme="cyberpunk"] .resize-v:hover::after,
body[data-theme="cyberpunk"] .resize-v.dragging::after { background: var(--p); box-shadow: var(--glow-sm); }

/* ── Quiz text sizes ───────────────────────────────────────────────────────── */
body[data-theme="cyberpunk"] #quiz-q           { font-size: 16px; }
body[data-theme="cyberpunk"] .quiz-opt         { font-size: 13px; letter-spacing: 0.05em; }
body[data-theme="cyberpunk"] .quiz-feedback    { font-size: 13px; }
body[data-theme="cyberpunk"] .fb-label         { font-size: 13px; }
body[data-theme="cyberpunk"] .fb-explain       { font-size: 12px; }
body[data-theme="cyberpunk"] #quiz-progress-n  { font-size: 28px; }
body[data-theme="cyberpunk"] .quiz-opt.opt-correct { background: rgba(0,229,255,0.09); border-color: var(--p); }
body[data-theme="cyberpunk"] .quiz-feedback.correct { background: rgba(0,229,255,0.07); border-color: rgba(0,229,255,0.3); }
body[data-theme="cyberpunk"] .result-score     { font-size: 72px; }

/* ── Gym text sizes & effects ──────────────────────────────────────────────── */
body[data-theme="cyberpunk"] .gym-card-name    { font-size: 13px; letter-spacing: 0.12em; }
body[data-theme="cyberpunk"] .gym-card-desc    { font-size: 12px; }
body[data-theme="cyberpunk"] .gym-card-meta    { font-size: 11px; }
body[data-theme="cyberpunk"] #gym-sidebar-workout { font-size: 13px; letter-spacing: 0.12em; }
body[data-theme="cyberpunk"] .gym-stat-label   { font-size: 11px; }
body[data-theme="cyberpunk"] .gym-rep-num      { font-size: 24px; }
body[data-theme="cyberpunk"] .gym-streak-val   { font-size: 36px; }
body[data-theme="cyberpunk"] #gym-category-tag { font-size: 11px; letter-spacing: 0.18em; }
body[data-theme="cyberpunk"] #gym-question     { font-size: 18px; }
body[data-theme="cyberpunk"] .gym-opt          { font-size: 13px; letter-spacing: 0.05em; }
body[data-theme="cyberpunk"] .gym-type-label   { font-size: 14px; }
body[data-theme="cyberpunk"] .gym-type-inp     { font-size: 14px; }
body[data-theme="cyberpunk"] .gym-feedback     { font-size: 13px; }
body[data-theme="cyberpunk"] .gym-res-score    { font-size: 72px; }
body[data-theme="cyberpunk"] .gym-res-pct      { font-size: 18px; }
body[data-theme="cyberpunk"] .gym-stat span    { font-size: 22px; }

/* Gym card hover — neon pulse instead of simple shadow */
body[data-theme="cyberpunk"] .gym-card {
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}
body[data-theme="cyberpunk"] .gym-card:hover {
  border-color: var(--p);
  transform: none;
  animation: neon-pulse 1.8s ease-in-out infinite;
  box-shadow: none;
}
body[data-theme="cyberpunk"] .gym-card:hover::before { box-shadow: 0 0 10px rgba(0,229,255,0.8); }

/* MC options — cyan correct, magenta wrong */
body[data-theme="cyberpunk"] .gym-opt.gym-opt-correct { background: rgba(0,229,255,0.09); border-color: var(--p); }
body[data-theme="cyberpunk"] .gym-feedback.correct    { background: rgba(0,229,255,0.07); border-color: rgba(0,229,255,0.3); }

/* Inputs */
body[data-theme="cyberpunk"] .gym-type-inp:focus { border-color: var(--p); box-shadow: var(--glow-sm); }
body[data-theme="cyberpunk"] .gym-type-inp.gym-inp-correct { background: rgba(0,229,255,0.06); border-color: var(--p); }
body[data-theme="cyberpunk"] #quiz-input input:focus { border-color: var(--p); box-shadow: var(--glow-sm); }

/* Timer bar */
body[data-theme="cyberpunk"] #gym-timer-fill { box-shadow: 0 0 8px rgba(0,229,255,0.8); }

/* ══════════════════════════════════════════════════════════════════════════════
   ACADEMIC THEME
   Classical conservative — warm ivory, Lora serif, Oxford crimson, navy code.
   Maximum readability for sustained study. Zero animation, zero glow.
   ══════════════════════════════════════════════════════════════════════════════ */

body[data-theme="academic"] {
  /* Ivory paper palette */
  --p:          #1c1a17;        /* deep warm black — primary text */
  --p-hi:       #000000;
  --p-dim:      #5a5650;        /* warm mid-gray */
  --p-vdim:     #9a968e;        /* light warm gray */
  --p-glow:     transparent;
  --amber:      #8b1a1a;        /* Oxford crimson — accent */
  --amber-dim:  rgba(139,26,26,0.07);
  --red:        #b91c1c;
  --red-dim:    rgba(185,28,28,0.07);
  --screen:     #f8f5ee;        /* warm ivory — like quality paper */
  --surface:    #f2efe6;
  --surface2:   #eae7dd;
  --surface3:   #e2dfd4;
  --border:     #ccc8bc;
  --border-hi:  #8b1a1a;        /* crimson highlight */
  --glow-sm:    none;
  --glow:       none;
  --glow-lg:    none;
  --font:       'Lora', Georgia, 'Times New Roman', serif;
  --mono:       'Source Code Pro', 'Courier New', monospace;

  font-size: 15px;
  line-height: 1.75;            /* generous — textbook rhythm */
  color: var(--p);
  background: var(--screen);
  background-image: none;
  animation: none;
  cursor: default;
}

/* Strip all CRT effects */
body[data-theme="academic"]::before,
body[data-theme="academic"]::after { display: none; }

/* ── Header ────────────────────────────────────────────────────────────────── */
body[data-theme="academic"] header {
  background: var(--surface);
  border-bottom: 2px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  height: 48px;
}

body[data-theme="academic"] header h1 {
  font-size: 16px;
  font-weight: 600;
  color: var(--p);
  text-shadow: none;
  letter-spacing: 0.01em;
  animation: none;
}
body[data-theme="academic"] header h1::after { display: none; }

/* ── Tabs ──────────────────────────────────────────────────────────────────── */
body[data-theme="academic"] .tab-btn {
  font-size: 13px;
  letter-spacing: 0.01em;
  color: var(--p-dim);
  border-right-color: var(--border);
  height: 48px;
}
body[data-theme="academic"] .tab-btn:hover {
  color: var(--p);
  background: rgba(0,0,0,0.04);
  text-shadow: none;
}
body[data-theme="academic"] .tab-btn.active {
  color: var(--amber);
  background: var(--amber-dim);
  text-shadow: none;
  border-bottom: 3px solid var(--amber);
  box-shadow: none;
  font-weight: 600;
}
body[data-theme="academic"] .tab-btn.quiz-tab.active {
  color: var(--amber);
  background: var(--amber-dim);
  border-bottom-color: var(--amber);
  text-shadow: none;
  box-shadow: none;
}
body[data-theme="academic"] .tab-btn.gym-tab.active {
  color: var(--amber);
  background: var(--amber-dim);
  border-bottom-color: var(--amber);
  text-shadow: none;
  box-shadow: none;
}

/* ── Theme button ──────────────────────────────────────────────────────────── */
body[data-theme="academic"] #theme-btn {
  font-size: 13px;
  letter-spacing: 0.04em;
  border-color: var(--border);
  color: var(--p-dim);
  clip-path: none;
  border-radius: 3px;
  text-transform: none;
}
body[data-theme="academic"] #theme-btn:hover {
  border-color: var(--amber);
  color: var(--amber);
  background: var(--amber-dim);
  box-shadow: none;
  text-shadow: none;
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */
body[data-theme="academic"] .btn {
  font-size: 13px;
  letter-spacing: 0.05em;
  clip-path: none;
  border-radius: 3px;
  text-transform: uppercase;
}
body[data-theme="academic"] .btn-primary {
  background: var(--amber);
  color: #fff;
  border-color: var(--amber);
  box-shadow: none;
  text-shadow: none;
}
body[data-theme="academic"] .btn-primary:hover:not(:disabled) {
  background: #6e1515;
  border-color: #6e1515;
  box-shadow: none;
  color: #fff;
  text-shadow: none;
}
body[data-theme="academic"] .btn-secondary { color: var(--p-dim); }
body[data-theme="academic"] .btn-secondary:hover:not(:disabled) {
  border-color: var(--amber);
  color: var(--amber);
  background: var(--amber-dim);
  box-shadow: none;
  text-shadow: none;
}

/* ── Step counter / error banner ───────────────────────────────────────────── */
body[data-theme="academic"] #step-counter { color: var(--p-dim); }
body[data-theme="academic"] #error-banner { color: var(--red); background: var(--red-dim); border-bottom-color: rgba(185,28,28,0.2); }

/* ── Lesson panel ──────────────────────────────────────────────────────────── */
body[data-theme="academic"] #lesson-panel { background: var(--surface); border-right: 1px solid var(--border); }

body[data-theme="academic"] #lesson-title {
  font-size: 19px;
  font-weight: 600;
  color: var(--p);
  text-shadow: none;
  text-transform: none;
  letter-spacing: 0;
  line-height: 1.3;
}

body[data-theme="academic"] .lesson-num {
  background: var(--amber);
  color: #fff;
  border-color: var(--amber);
  box-shadow: none;
  text-shadow: none;
  font-size: 14px;
  font-family: var(--mono);
}

body[data-theme="academic"] #lesson-intro {
  color: var(--p-dim);
  font-size: 15px;
  border-left-color: var(--border);
  font-style: italic;             /* serif italic reads beautifully for introductory text */
}

/* § section signs — the typographic convention for academic sections */
body[data-theme="academic"] .section-label {
  font-size: 11px;
  color: var(--p-vdim);
  letter-spacing: 0.14em;
}
body[data-theme="academic"] .section-label::before {
  content: '§';
  font-size: 13px;
  color: var(--amber);
}

body[data-theme="academic"] #concepts-list li {
  border-color: var(--border);
  border-left: 3px solid var(--border-hi);
  background: var(--screen);
  font-size: 14px;
}
body[data-theme="academic"] #concepts-list li:hover {
  border-left-color: #6e1515;
  box-shadow: none;
}
body[data-theme="academic"] #concepts-list strong {
  color: var(--amber);
  text-shadow: none;
  font-size: 13px;
}
body[data-theme="academic"] .concept-desc { font-size: 14px; }

body[data-theme="academic"] #diagram-pre {
  background: var(--surface2);
  border-color: var(--border);
  color: var(--p-dim);
}

body[data-theme="academic"] .exercise-card { background: var(--surface2); border-color: var(--border); border-top-color: var(--amber); }
body[data-theme="academic"] .exercise-card::before { color: var(--p-vdim); background: var(--surface2); }
body[data-theme="academic"] #exercise-box { font-size: 14px; color: var(--p-dim); }

body[data-theme="academic"] #hint-btn,
body[data-theme="academic"] #solution-btn { font-size: 13px; text-transform: none; }
body[data-theme="academic"] #hint-btn:hover,
body[data-theme="academic"] #solution-btn:hover { color: var(--amber); border-color: var(--amber); text-shadow: none; }
body[data-theme="academic"] #hint-box { color: var(--amber); text-shadow: none; font-size: 14px; }
body[data-theme="academic"] .solution-box { color: var(--p); text-shadow: none; font-size: 13px; border-color: var(--border); }

/* ── State panel headers ───────────────────────────────────────────────────── */
body[data-theme="academic"] .state-header {
  font-size: 11px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  color: var(--p-vdim);
  letter-spacing: 0.14em;
}
body[data-theme="academic"] .state-header::before { color: var(--amber); }

/* ── Registers ─────────────────────────────────────────────────────────────── */
body[data-theme="academic"] #reg-table tr { border-bottom-color: var(--border); }
body[data-theme="academic"] #reg-table tr.changed { background: var(--amber-dim); }
body[data-theme="academic"] #reg-table tr.changed .reg-name { color: var(--amber); text-shadow: none; }
body[data-theme="academic"] #reg-table tr.changed .reg-hex  { color: var(--p); text-shadow: none; }
body[data-theme="academic"] .reg-name { color: var(--amber); text-shadow: none; }
body[data-theme="academic"] .reg-hex  { color: #1e3a5f; }   /* navy — like printed hex in textbooks */
body[data-theme="academic"] .reg-dec  { color: var(--p-dim); }

/* ── Flags ─────────────────────────────────────────────────────────────────── */
body[data-theme="academic"] .flag { border-color: var(--border); }
body[data-theme="academic"] .flag-set {
  color: var(--p);
  background: var(--amber-dim);
  border-color: rgba(139,26,26,0.3);
  text-shadow: none;
  box-shadow: none;
}
body[data-theme="academic"] .flag-clear { color: var(--p-vdim); }
body[data-theme="academic"] .flag.changed { border-color: var(--amber); box-shadow: none; outline: none; }

/* ── Stack ─────────────────────────────────────────────────────────────────── */
body[data-theme="academic"] .stack-row.stack-top { background: var(--amber-dim); border-left-color: var(--amber); }
body[data-theme="academic"] .stack-val   { color: #1e3a5f; }
body[data-theme="academic"] .stack-label { color: var(--amber); text-shadow: none; }
body[data-theme="academic"] .stdout-line { color: var(--p); background: rgba(0,0,0,0.04); border-left-color: var(--border); }

/* ── Log ───────────────────────────────────────────────────────────────────── */
body[data-theme="academic"] .log-entry         { color: var(--p-dim); }
body[data-theme="academic"] .log-entry::before { color: var(--border-hi); }
body[data-theme="academic"] .log-warn          { color: #7a5c08; background: rgba(122,92,8,0.08); }
body[data-theme="academic"] .log-error         { color: var(--red); background: var(--red-dim); }

/* ── Resize handles ────────────────────────────────────────────────────────── */
body[data-theme="academic"] .resize-h:hover,     body[data-theme="academic"] .resize-h.dragging,
body[data-theme="academic"] .resize-v:hover,     body[data-theme="academic"] .resize-v.dragging { background: rgba(0,0,0,0.03); }
body[data-theme="academic"] .resize-h::after,    body[data-theme="academic"] .resize-v::after    { background: var(--border); }
body[data-theme="academic"] .resize-h:hover::after, body[data-theme="academic"] .resize-h.dragging::after,
body[data-theme="academic"] .resize-v:hover::after, body[data-theme="academic"] .resize-v.dragging::after { background: var(--amber); box-shadow: none; }

/* ── CodeMirror — light academic ───────────────────────────────────────────── */
body[data-theme="academic"] .cm-s-nasm-dark.CodeMirror {
  background: #f5f2eb;
  color: var(--p);
  font-size: 13px;
  line-height: 21px;
}
body[data-theme="academic"] .cm-s-nasm-dark .CodeMirror-gutters    { background: var(--surface2); border-right-color: var(--border); }
body[data-theme="academic"] .cm-s-nasm-dark .CodeMirror-linenumber { color: var(--p-vdim); }
body[data-theme="academic"] .cm-s-nasm-dark .CodeMirror-cursor     { border-left-color: var(--p); box-shadow: none; }
body[data-theme="academic"] .cm-s-nasm-dark .CodeMirror-selected,
body[data-theme="academic"] .cm-s-nasm-dark .CodeMirror-focused .CodeMirror-selected { background: rgba(139,26,26,0.1); }
body[data-theme="academic"] .cm-s-nasm-dark .CodeMirror-matchingbracket { color: var(--amber) !important; font-weight: bold; }

body[data-theme="academic"] .cm-s-nasm-dark .cm-comment    { color: #887e72; font-style: italic; }
body[data-theme="academic"] .cm-s-nasm-dark .cm-string     { color: #2c6e49; }       /* forest green */
body[data-theme="academic"] .cm-s-nasm-dark .cm-number,
body[data-theme="academic"] .cm-s-nasm-dark .cm-atom       { color: #1e3a5f; }       /* navy */
body[data-theme="academic"] .cm-s-nasm-dark .cm-keyword    { color: #1c1a17; font-weight: 600; text-shadow: none; }
body[data-theme="academic"] .cm-s-nasm-dark .cm-variable-2 { color: var(--amber); text-shadow: none; }
body[data-theme="academic"] .cm-s-nasm-dark .cm-def        { color: #1e3a5f; font-weight: 600; }
body[data-theme="academic"] .cm-s-nasm-dark .cm-meta       { color: var(--p-dim); }
body[data-theme="academic"] .cm-s-nasm-dark .cm-type       { color: #2c6e49; }
body[data-theme="academic"] .cm-s-nasm-dark .cm-active-step {
  background: rgba(139,26,26,0.07) !important;
  border-left-color: var(--amber);
  box-shadow: none;
}

/* ── Quiz ──────────────────────────────────────────────────────────────────── */
body[data-theme="academic"] #quiz-sidebar { background: var(--surface); border-right-color: var(--border); }
body[data-theme="academic"] #quiz-progress-n { font-size: 28px; color: var(--p); text-shadow: none; }
body[data-theme="academic"] .quiz-progress-track { background: var(--surface3); border-color: var(--border); }
body[data-theme="academic"] #quiz-progress { background: var(--amber); box-shadow: none; }
body[data-theme="academic"] #quiz-q { font-size: 17px; font-weight: 600; text-shadow: none; }
body[data-theme="academic"] #quiz-code { background: var(--surface2); border-color: var(--border); color: var(--p); }
body[data-theme="academic"] .quiz-opt {
  font-family: var(--font);
  font-size: 15px;
  background: var(--surface);
  border-color: var(--border);
  color: var(--p);
  border-radius: 3px;
}
body[data-theme="academic"] .quiz-opt:hover:not(:disabled) {
  border-color: var(--amber);
  background: var(--amber-dim);
  color: var(--p);
  text-shadow: none;
}
body[data-theme="academic"] .quiz-opt.opt-correct { border-color: #2c6e49; background: rgba(44,110,73,0.08); color: #1d5236; }
body[data-theme="academic"] .quiz-opt.opt-wrong   { border-color: var(--red); background: var(--red-dim); color: var(--red); }
body[data-theme="academic"] #quiz-input label     { color: var(--amber); text-shadow: none; }
body[data-theme="academic"] #quiz-input input {
  background: var(--screen);
  border-color: var(--border);
  color: var(--p);
  caret-color: var(--p);
  border-radius: 3px;
}
body[data-theme="academic"] #quiz-input input:focus { border-color: var(--amber); box-shadow: none; }
body[data-theme="academic"] .quiz-feedback { font-family: var(--font); font-size: 15px; }
body[data-theme="academic"] .quiz-feedback.correct { background: rgba(44,110,73,0.07); border-color: rgba(44,110,73,0.28); color: #1d5236; }
body[data-theme="academic"] .quiz-feedback.wrong   { background: var(--red-dim); border-color: rgba(185,28,28,0.25); color: var(--red); }
body[data-theme="academic"] .result-score { color: var(--amber); text-shadow: none; font-family: var(--mono); }
body[data-theme="academic"] .result-score span { color: var(--p-dim); }
body[data-theme="academic"] .result-pct { color: var(--p); }
body[data-theme="academic"] .result-row { border-color: var(--border); background: var(--surface); }
body[data-theme="academic"] .result-row.row-ok  .row-icon { color: #2c6e49; }
body[data-theme="academic"] .result-row.row-bad .row-icon { color: var(--red); }

/* ── Gym ───────────────────────────────────────────────────────────────────── */
body[data-theme="academic"] #gym-sidebar { background: var(--surface); border-right-color: var(--border); }
body[data-theme="academic"] #gym-sidebar-workout { font-size: 15px; color: var(--p); text-shadow: none; letter-spacing: 0; text-transform: none; }
body[data-theme="academic"] .gym-stat-label { color: var(--p-vdim); }
body[data-theme="academic"] .gym-rep-num   { font-size: 26px; color: var(--p); text-shadow: none; }
body[data-theme="academic"] .gym-streak-val { font-size: 34px; color: var(--amber); text-shadow: none; }
body[data-theme="academic"] .gym-streak-val.heating { color: #7a5c08; text-shadow: none; }
body[data-theme="academic"] .gym-streak-val.on-fire { color: var(--red); text-shadow: none; animation: none; }

body[data-theme="academic"] .gym-card {
  clip-path: none;
  border-radius: 4px;
  background: var(--surface);
  border-color: var(--border);
}
body[data-theme="academic"] .gym-card:hover {
  border-color: var(--amber);
  background: var(--surface2);
  box-shadow: 0 2px 8px rgba(0,0,0,0.07);
  animation: none;
  transform: none;
}
body[data-theme="academic"] .gym-card:hover::before { background: var(--amber); box-shadow: none; }
body[data-theme="academic"] .gym-card-name { font-size: 15px; text-transform: none; letter-spacing: 0; text-shadow: none; color: var(--p); font-weight: 600; }
body[data-theme="academic"] .gym-card-desc { font-size: 13px; color: var(--p-dim); }

body[data-theme="academic"] #gym-timer-track { background: var(--surface3); border-color: var(--border); }
body[data-theme="academic"] #gym-timer-fill  { background: var(--amber); box-shadow: none; }
body[data-theme="academic"] #gym-category-tag { color: var(--p-vdim); letter-spacing: 0.1em; }
body[data-theme="academic"] #gym-question   { font-size: 19px; color: var(--p); text-shadow: none; }
body[data-theme="academic"] #gym-question code { color: var(--amber); text-shadow: none; background: var(--surface2); }
body[data-theme="academic"] #gym-drill-code { background: var(--surface2); border-color: var(--border); color: var(--p); }

body[data-theme="academic"] .gym-opt {
  font-family: var(--font);
  font-size: 15px;
  background: var(--surface);
  border-color: var(--border);
  color: var(--p);
  border-radius: 3px;
}
body[data-theme="academic"] .gym-opt:hover:not(:disabled) {
  border-color: var(--amber);
  background: var(--amber-dim);
  color: var(--p);
  text-shadow: none;
}
body[data-theme="academic"] .gym-opt.gym-opt-correct { border-color: #2c6e49; background: rgba(44,110,73,0.08); color: #1d5236; }
body[data-theme="academic"] .gym-opt.gym-opt-wrong   { border-color: var(--red); background: var(--red-dim); color: var(--red); }
body[data-theme="academic"] .gym-key { border-color: var(--border); color: var(--p-dim); }
body[data-theme="academic"] .gym-type-label { color: var(--amber); text-shadow: none; font-size: 15px; }
body[data-theme="academic"] .gym-type-inp {
  background: var(--screen);
  border-color: var(--border);
  color: var(--p);
  border-radius: 3px;
  font-size: 15px;
  caret-color: var(--p);
}
body[data-theme="academic"] .gym-type-inp:focus         { border-color: var(--amber); box-shadow: none; }
body[data-theme="academic"] .gym-type-inp.gym-inp-correct { background: rgba(44,110,73,0.07); border-color: #2c6e49; }

body[data-theme="academic"] .gym-feedback { font-family: var(--font); font-size: 15px; }
body[data-theme="academic"] .gym-feedback.correct { background: rgba(44,110,73,0.07); border-color: rgba(44,110,73,0.28); color: #1d5236; }
body[data-theme="academic"] .gym-feedback.wrong   { background: var(--red-dim); border-color: rgba(185,28,28,0.25); color: var(--red); }

body[data-theme="academic"] .gym-res-score { font-size: 80px; color: var(--amber); text-shadow: none; font-family: var(--mono); }
body[data-theme="academic"] .gym-res-score span { color: var(--p-dim); }
body[data-theme="academic"] .gym-res-pct   { color: var(--p); text-shadow: none; }
body[data-theme="academic"] .gym-stat      { background: var(--surface); border-color: var(--border); }
body[data-theme="academic"] .gym-stat span { color: var(--p); text-shadow: none; }

/* ══════════════════════════════════════════════════════════════════════════════
   PLAYGROUND
   ══════════════════════════════════════════════════════════════════════════════ */

#playground-wrap {
  display: none;
  width: 100%;
  height: calc(100vh - var(--header-h));
  grid-template-columns: 280px 1fr;
  overflow: hidden;
}

/* Sidebar: registers + flags + stack */
#pg-sidebar {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow: hidden;
}

#pg-sidebar-top {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

#pg-sidebar-top .state-scroll {
  flex: 1 1 auto;
  overflow-y: auto;
}

#pg-sidebar-mid {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#pg-sidebar-mid #pg-stack-panel {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 6px 10px;
}

/* Main: toolbar + editor + log */
#pg-main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--screen);
}

#pg-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#pg-toolbar #pg-step-counter {
  font-size: 12px;
  color: var(--p-dim);
  font-family: var(--mono);
  margin-left: 4px;
}

#pg-snippets {
  margin-left: auto;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--p-dim);
  font-family: var(--mono);
  font-size: 12px;
  padding: 4px 8px;
  cursor: pointer;
  outline: none;
}
#pg-snippets:hover { border-color: var(--p-dim); color: var(--p); }

#pg-error-banner {
  display: none;
  padding: 6px 12px;
  background: var(--red-dim);
  color: var(--red);
  font-family: var(--mono);
  font-size: 13px;
  border-bottom: 1px solid var(--red-dim);
  flex-shrink: 0;
}

#pg-editor-host {
  flex: 1 1 auto;
  overflow: hidden;
  min-height: 0;
}

#pg-editor-host .CodeMirror {
  height: 100%;
  background: var(--screen);
  color: var(--p);
  font-family: var(--mono);
  font-size: var(--editor-font-size, 14px);
}

#pg-log-section {
  flex: 0 0 auto;
  max-height: 160px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

#pg-log-section .state-header { flex-shrink: 0; }
#pg-log-section .state-scroll {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 4px 10px 6px;
}

/* Playground tab active indicator */
.tab-btn.playground-tab.active { color: var(--screen); background: var(--p); text-shadow: none; }

/* ── Cyberpunk playground overrides ─────────────────────────────────────────── */
body[data-theme="cyberpunk"] #pg-snippets {
  background: var(--surface2);
  border-color: var(--border-hi);
  color: var(--p-dim);
}
body[data-theme="cyberpunk"] #pg-snippets:hover { border-color: var(--p); color: var(--p); }

/* ── Academic playground overrides ──────────────────────────────────────────── */
body[data-theme="academic"] #pg-sidebar  { background: var(--surface); border-right-color: var(--border); }
body[data-theme="academic"] #pg-snippets {
  background: var(--screen);
  border-color: var(--border);
  color: var(--p-dim);
  border-radius: 3px;
  font-size: 12px;
}
body[data-theme="academic"] #pg-snippets:hover { border-color: var(--amber); color: var(--amber); }
body[data-theme="academic"] #pg-error-banner   { background: var(--red-dim); color: var(--red); }
body[data-theme="academic"] #pg-editor-host .CodeMirror { background: var(--screen); color: var(--p); }
body[data-theme="academic"] .tab-btn.playground-tab.active { background: var(--amber); color: #fff; border-color: var(--amber); }

/* ── Rank (placement + adaptive practice) ───────────────────────────────────── */
.rank-wrap {
  display: none;
  flex-direction: row;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.rank-sidebar {
  width: 200px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.rank-main-col {
  flex: 1;
  overflow-y: auto;
  padding: 20px 28px 32px;
}

.rank-title {
  font-size: 26px;
  font-weight: 400;
  color: var(--p);
  text-shadow: var(--glow-sm);
  margin: 0 0 12px;
  letter-spacing: 0.02em;
}

.rank-lead {
  font-size: 16px;
  color: var(--p-dim);
  line-height: 1.55;
  max-width: 720px;
  margin: 0 0 20px;
}

.rank-muted { color: var(--p-vdim); font-size: 15px; }

.rank-tier-badge {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--border-hi);
  font-size: 18px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rank-tier-bronze  { color: #c9a227; border-color: #c9a227; }
.rank-tier-silver { color: #b8c4d9; border-color: #b8c4d9; }
.rank-tier-gold   { color: #e8c547; border-color: #e8c547; text-shadow: 0 0 8px rgba(232,197,71,0.35); }
.rank-tier-platinum { color: var(--p); border-color: var(--p); }

.rank-tier-bronze, .rank-tier-silver, .rank-tier-gold, .rank-tier-platinum { font-weight: 400; }

.rank-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  max-width: 900px;
  margin-bottom: 16px;
}

@media (max-width: 800px) {
  .rank-grid-2 { grid-template-columns: 1fr; }
}

.rank-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 14px 16px;
}

.rank-card-wide { max-width: 900px; }

.rank-card h3 {
  margin: 0 0 10px;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--p-dim);
}

.rank-list { margin: 0; padding-left: 18px; color: var(--p-dim); line-height: 1.6; }

.rank-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

.rank-lesson-bank { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }

.rank-progress { margin: 12px 0 20px; max-width: 640px; }

.rank-q-meta { margin-bottom: 8px; }

.rank-tag {
  display: inline-block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--amber);
  border: 1px solid var(--border);
  padding: 2px 8px;
}

.rank-question {
  font-size: 20px;
  color: var(--p);
  line-height: 1.5;
  max-width: 720px;
  margin: 0 0 12px;
}

.rank-code {
  background: var(--screen);
  border: 1px solid var(--border);
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.65;
  max-width: 720px;
  overflow-x: auto;
  white-space: pre;
}

.rank-mc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  max-width: 720px;
}

.rank-type-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  max-width: 720px;
}

.rank-nav { margin-top: 16px; display: flex; gap: 10px; flex-wrap: wrap; }

.rank-help-row { display: flex; gap: 8px; margin: 10px 0; }

.rank-hint-box,
.rank-sol-box {
  max-width: 720px;
  white-space: pre-wrap;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--p-dim);
  margin: 0 0 12px;
}

.rank-practice-top {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.rank-rec {
  margin-top: 10px;
  font-size: 14px;
  color: var(--p-dim);
}

.tab-btn.rank-tab.active { color: var(--screen); background: var(--p); text-shadow: var(--glow-sm); }

body[data-theme="cyberpunk"] .tab-btn.rank-tab.active {
  background: rgba(0, 229, 255, 0.12);
  color: var(--p);
  border-color: var(--p);
}

body[data-theme="academic"] .tab-btn.rank-tab.active {
  background: var(--amber);
  color: #fff;
  border-color: var(--amber);
  text-shadow: none;
}