/* =============================================
   KeyQuest – Main Stylesheet
   ============================================= */

/* ---------- CSS Custom Properties ---------- */
:root {
  --clr-primary:       #4f46e5;
  --clr-primary-dark:  #4338ca;
  --clr-primary-light: #e0e7ff;
  --clr-on-primary:    #ffffff;
  --clr-accent:        #f59e0b;

  --clr-bg:            #f8fafc;
  --clr-surface:       #ffffff;
  --clr-surface-2:     #f1f5f9;
  --clr-border:        #e2e8f0;

  --clr-text:          #1e293b;
  --clr-text-muted:    #526077;
  --clr-text-inverse:  #ffffff;
  --clr-border-strong: #7c8799;

  --clr-pass:          #15803d;
  --clr-pass-bg:       #dcfce7;
  --clr-fail:          #b91c1c;
  --clr-fail-bg:       #fee2e2;
  --clr-warn:          #92400e;
  --clr-warn-bg:       #fef3c7;
  --clr-focus:         #4f46e5;

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 12px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:  0 10px 30px rgba(0,0,0,.12), 0 4px 8px rgba(0,0,0,.06);

  --header-h:   64px;
  --transition: 0.2s ease;
}

/* ---------- Dark Theme ---------- */
[data-theme="dark"] {
  --clr-bg:          #0f172a;
  --clr-surface:     #1e293b;
  --clr-surface-2:   #273548;
  --clr-border:      #334155;
  --clr-text:        #e2e8f0;
  --clr-text-muted:  #94a3b8;
  --clr-primary:     #a5b4fc;
  --clr-primary-dark: #c7d2fe;
  --clr-primary-light: #312e81;
  --clr-on-primary:  #0f172a;
  --clr-text-inverse: #0f172a;
  --clr-border-strong: #7c8799;
  --clr-pass:        #86efac;
  --clr-pass-bg:     #14532d;
  --clr-fail:        #fca5a5;
  --clr-fail-bg:     #7f1d1d;
  --clr-warn:        #fde68a;
  --clr-warn-bg:     #78350f;
  --clr-focus:       #a5b4fc;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.3);
  --shadow-md:  0 4px 12px rgba(0,0,0,.4);
  --shadow-lg:  0 10px 30px rgba(0,0,0,.5);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--clr-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; }
img, svg { display: block; }
button { cursor: pointer; font-family: inherit; }

/* ---------- Layout Helpers ---------- */
.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}
main { flex: 1; }

/* =============================================
   HEADER
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), border-color var(--transition);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  color: var(--clr-text);
  text-decoration: none;
  flex-shrink: 0;
}
.logo-icon { width: 36px; height: 36px; border-radius: 8px; }
.logo-text {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -.5px;
  color: var(--clr-text);
}
.logo-text strong { color: var(--clr-primary); }

/* Nav */
.main-nav { margin-left: auto; }
.main-nav ul { display: flex; gap: .25rem; }
.nav-link {
  display: block;
  padding: .45rem .9rem;
  border-radius: var(--radius-sm);
  color: var(--clr-text-muted);
  font-size: .95rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.nav-link:hover, .nav-link.active {
  background: var(--clr-primary-light);
  color: var(--clr-primary);
  text-decoration: none;
}

/* Header actions */
.header-actions { display: flex; align-items: center; gap: .5rem; }

.btn-icon {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text-muted);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.btn-icon:hover { background: var(--clr-surface-2); color: var(--clr-text); }
.btn-icon .icon { width: 18px; height: 18px; }

/* Theme toggle icon swap */
:root:not([data-theme="dark"]) .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }

/* Mobile menu button */
.btn-mobile-menu {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px; height: 38px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background: transparent;
  padding: 8px;
}
.btn-mobile-menu span {
  display: block;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
  background: var(--rm-hero-bg);
  padding: 3rem 0 2.5rem;
  text-align: center;
  color: #fff;
}
.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -.5px;
  margin-bottom: .6rem;
}
.hero p {
  font-size: 1.05rem;
  max-width: 560px;
  margin-inline: auto;
}

/* =============================================
   CONVERTER CARD
   ============================================= */
.converter-section { padding: 2.5rem 0 3rem; }

.converter-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: background var(--transition), border-color var(--transition);
}

/* Case conversion buttons */
.case-buttons-section { padding: 1.25rem 1.25rem .75rem; }
.case-buttons-section h2 {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--clr-text-muted);
  margin-bottom: .85rem;
}
/* Divider */
.section-divider { height: 1px; background: var(--clr-border); margin: 0 1.25rem; }

/* Action toolbar */
.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  padding: 1rem 1.25rem;
  align-items: center;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem 1rem;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text);
  font-size: .875rem;
  font-weight: 500;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.action-btn svg { width: 15px; height: 15px; flex-shrink: 0; }
.action-btn:hover {
  background: var(--clr-surface-2);
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}
.action-btn.danger:hover {
  border-color: #ef4444;
  color: #ef4444;
}
.action-btn.success {
  border-color: #22c55e;
  color: #22c55e;
}

.ml-auto { margin-left: auto; }

/* Toast notification */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--clr-text);
  color: var(--clr-text-inverse);
  padding: .65rem 1.4rem;
  border-radius: var(--radius-lg);
  font-size: .9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  opacity: 0;
  transition: transform .3s ease, opacity .3s ease;
  pointer-events: none;
  white-space: nowrap;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ---------- Accessibility helpers ---------- */
:focus-visible {
  outline: 3px solid var(--clr-focus);
  outline-offset: 2px;
}
.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1000;
  background: var(--clr-primary);
  color: var(--clr-on-primary);
  padding: .5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus { top: .75rem; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.hero code {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: .95em;
  background: rgba(255,255,255,.18);
  padding: .05rem .4rem;
  border-radius: var(--radius-sm);
}

/* =============================================
   SETTINGS FORM
   ============================================= */
.card-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .25rem 1rem;
  padding: 1.25rem 1.25rem 0;
}
.card-heading h2 { font-size: 1.15rem; font-weight: 700; }
.card-heading p { font-size: .875rem; color: var(--clr-text-muted); }

.field-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  padding: 1.25rem;
}
.field { min-width: 0; }
.field label {
  display: block;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--clr-text-muted);
  margin-bottom: .45rem;
}
.input-wrap {
  display: flex;
  align-items: stretch;
  border: 1.5px solid var(--clr-border-strong);
  border-radius: var(--radius-md);
  background: var(--clr-surface);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.input-wrap:focus-within {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px var(--clr-primary-light);
}
.field.invalid .input-wrap { border-color: var(--clr-fail); }
.input-wrap input,
.input-wrap select {
  flex: 1;
  min-width: 0;
  padding: .6rem .8rem;
  border: none;
  outline: none;
  background: var(--clr-surface);
  color: var(--clr-text);
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 1rem;
}
.input-wrap select { font-family: inherit; font-size: .95rem; cursor: pointer; }
.input-unit {
  display: flex;
  align-items: center;
  padding: 0 .75rem;
  background: var(--clr-surface-2);
  border-left: 1.5px solid var(--clr-border);
  color: var(--clr-text-muted);
  font-size: .85rem;
  font-weight: 600;
}
.field-hint {
  font-size: .8rem;
  color: var(--clr-text-muted);
  margin-top: .35rem;
  font-variant-numeric: tabular-nums;
}

/* Messages (validation + accessibility warnings) */
.messages:empty { display: none; }
.messages { padding: 0 1.25rem 1.25rem; display: flex; flex-direction: column; gap: .5rem; }
.message {
  display: flex;
  gap: .6rem;
  align-items: flex-start;
  padding: .7rem .9rem;
  border-radius: var(--radius-md);
  font-size: .875rem;
  line-height: 1.5;
}
.message svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: .1rem; }
.message.error { background: var(--clr-fail-bg); color: var(--clr-fail); }
.message.warn  { background: var(--clr-warn-bg); color: var(--clr-warn); }

/* =============================================
   OUTPUT
   ============================================= */
.output-block { padding: 1.25rem; }
.output-block h3,
.preview-block h3 {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--clr-text-muted);
  margin-bottom: .6rem;
}
.code-output {
  display: block;
  width: 100%;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: clamp(.9rem, .8rem + .4vw, 1.15rem);
  background: var(--clr-surface-2);
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  white-space: pre;
  line-height: 1.6;
}
.code-output .tok-fn   { color: var(--clr-primary); font-weight: 600; }
.code-output .tok-prop { color: var(--clr-text-muted); }
.code-output.big { font-size: clamp(1rem, .85rem + .7vw, 1.4rem); font-weight: 600; }
.code-output.scale { max-height: 320px; overflow: auto; font-size: .875rem; }

/* =============================================
   PLAYER BAR (level, XP, streak)
   ============================================= */
.player-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem 1.25rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--clr-border);
  background: var(--clr-surface-2);
}
.level-badge {
  width: 46px; height: 46px;
  flex-shrink: 0;
  border-radius: 14px;
  background: linear-gradient(135deg, #1a5fb4, #0b2a4a);
  color: #fff;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  line-height: 1;
  box-shadow: 0 4px 12px rgba(26,95,180,.35);
}
.level-badge small { font-size: .6rem; font-weight: 600; opacity: .9; letter-spacing: .5px; }
.level-badge strong { font-size: 1.2rem; font-weight: 800; }
.player-info { flex: 1; min-width: 180px; }
.player-rank { font-weight: 700; font-size: .95rem; }
.player-rank span { font-weight: 500; color: var(--clr-text-muted); font-size: .8rem; margin-left: .35rem; }
.xp-track { height: 8px; border-radius: 999px; background: var(--clr-border); overflow: hidden; margin-top: .4rem; }
.xp-fill { height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--rm-success), var(--rm-primary)); transition: width .6s ease; }
.player-chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .3rem .7rem;
  border-radius: 999px;
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  font-size: .8rem;
  font-weight: 600;
  white-space: nowrap;
}
.chip button { background: none; border: none; color: inherit; font: inherit; padding: 0; }
.sound-btn { cursor: pointer; }
.sound-btn[aria-pressed="false"] { opacity: .6; }

/* =============================================
   MODE TABS
   ============================================= */
.mode-tabs {
  display: flex;
  gap: .25rem;
  padding: .75rem 1.25rem 0;
  border-bottom: 1px solid var(--clr-border);
  overflow-x: auto;
}
.mode-tab {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .65rem 1rem;
  border: none;
  border-bottom: 3px solid transparent;
  background: none;
  color: var(--clr-text-muted);
  font-size: .92rem;
  font-weight: 600;
  white-space: nowrap;
}
.mode-tab:hover { color: var(--clr-text); }
.mode-tab[aria-selected="true"] { color: var(--clr-primary); border-bottom-color: var(--clr-primary); }
.mode-panel { padding: 1.25rem; }
.mode-panel[hidden] { display: none; }
.panel-intro { font-size: .9rem; color: var(--clr-text-muted); margin-bottom: 1rem; }

/* =============================================
   LESSON MAP
   ============================================= */
.tier { margin-bottom: 1.25rem; }
.tier-head {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .6rem;
}
.tier-head h3 { font-size: 1rem; font-weight: 700; }
.tier-dot { width: 12px; height: 12px; border-radius: 50%; }
.tier-progress { font-size: .78rem; color: var(--clr-text-muted); margin-left: auto; }
.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: .6rem;
}
.lesson-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .25rem;
  padding: .8rem .9rem;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text);
  text-align: left;
  transition: border-color var(--transition), transform .1s, box-shadow var(--transition);
}
.lesson-card:not(:disabled):hover { border-color: var(--clr-primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.lesson-card:disabled { cursor: not-allowed; opacity: .55; background: var(--clr-surface-2); }
.lesson-card .num { font-size: .72rem; font-weight: 700; color: var(--clr-text-muted); }
.lesson-card .name { font-weight: 600; font-size: .9rem; }
.lesson-card .meta { font-size: .75rem; color: var(--clr-text-muted); }
.lesson-card .stars { font-size: .95rem; letter-spacing: 1px; color: #f59e0b; }
.lesson-card .stars .off { color: var(--clr-border-strong); }
.lesson-card .lock { position: absolute; top: .7rem; right: .75rem; font-size: .9rem; }
.lesson-card.next { border-color: var(--clr-primary); box-shadow: 0 0 0 3px var(--clr-primary-light); }

/* =============================================
   TYPING AREA
   ============================================= */
.typing-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1rem;
  margin-bottom: .9rem;
}
.typing-head h3 { font-size: 1.05rem; font-weight: 700; }
.typing-head .target { font-size: .8rem; color: var(--clr-text-muted); }
.live-stats { display: flex; flex-wrap: wrap; gap: .5rem; margin-left: auto; }
.live-stat {
  min-width: 76px;
  padding: .35rem .7rem;
  border-radius: var(--radius-md);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  text-align: center;
}
.live-stat strong { display: block; font-size: 1.15rem; font-weight: 800; font-variant-numeric: tabular-nums; line-height: 1.2; }
.live-stat span { font-size: .68rem; font-weight: 600; text-transform: uppercase; letter-spacing: .8px; color: var(--clr-text-muted); }
.live-stat.combo strong { color: #f59e0b; }

.text-box {
  position: relative;
  padding: 1.25rem 1.4rem;
  border-radius: var(--radius-lg);
  border: 2px solid var(--clr-border);
  background: var(--clr-surface);
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: clamp(1.1rem, .95rem + .7vw, 1.5rem);
  line-height: 1.9;
  letter-spacing: .3px;
  cursor: text;
  min-height: 9.5em;
  max-height: 9.5em;
  overflow: hidden;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  overflow-wrap: break-word;
}
.text-box.focused { border-color: var(--clr-primary); box-shadow: 0 0 0 4px var(--clr-primary-light); }
.text-box .ch { color: var(--clr-text-muted); border-radius: 3px; transition: color .08s; }
.text-box .ok { color: var(--clr-text); }
.text-box .err { color: #fff; background: #dc2626; }
.text-box .err.space { background: rgba(220,38,38,.5); }
.text-box .cur { position: relative; }
.text-box .cur::before {
  content: '';
  position: absolute;
  left: -1px; top: .25em; bottom: .25em;
  width: 2px;
  background: var(--clr-primary);
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.text-box .focus-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--clr-surface) 80%, transparent);
  backdrop-filter: blur(2px);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-primary);
}
.text-box.focused .focus-hint { display: none; }
.hidden-input { position: absolute; opacity: 0; width: 1px; height: 1px; left: 0; top: 0; pointer-events: none; }
.progress-track { height: 6px; border-radius: 999px; background: var(--clr-border); overflow: hidden; margin-top: .75rem; }
.progress-fill { height: 100%; width: 0; background: var(--clr-primary); transition: width .15s linear; }
.typing-actions { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .9rem; align-items: center; }
.typing-actions .hint { font-size: .8rem; color: var(--clr-text-muted); margin-left: auto; }
.typing-actions kbd, .guide-kbd {
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  padding: .1rem .4rem;
  border: 1px solid var(--clr-border-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--clr-surface);
}

/* Option pills (test length, content) */
.option-row { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; align-items: center; margin-bottom: 1rem; }
.pill-group { display: inline-flex; border: 1.5px solid var(--clr-border); border-radius: 999px; overflow: hidden; }
.pill-group button {
  padding: .35rem .85rem;
  border: none;
  background: var(--clr-surface);
  color: var(--clr-text);
  font-size: .82rem;
  font-weight: 600;
}
.pill-group button + button { border-left: 1.5px solid var(--clr-border); }
.pill-group button[aria-pressed="true"] { background: var(--clr-primary); color: var(--clr-on-primary); }
.option-label { font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: var(--clr-text-muted); margin-right: .35rem; }

/* =============================================
   ON-SCREEN KEYBOARD (finger guide)
   ============================================= */
.kbd {
  margin-top: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  user-select: none;
}
.kbd[hidden] { display: none; }
.kbd-row { display: flex; gap: 5px; }
.key {
  width: 40px; height: 40px;
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: .8rem;
  font-weight: 600;
  color: #1e293b;
  border: 1px solid rgba(0,0,0,.12);
  border-bottom-width: 3px;
  transition: transform .06s, box-shadow .1s;
}
.key.wide { width: 64px; font-size: .68rem; }
.key.wider { width: 80px; font-size: .68rem; }
.key.space { width: 260px; }
.key.home::after { content: ''; position: absolute; }
.key.bump { text-decoration: underline; text-underline-offset: 3px; }
.key.next { outline: 3px solid #f59e0b; outline-offset: 1px; transform: translateY(-2px); box-shadow: 0 0 14px rgba(245,158,11,.7); }
.key.pressed { transform: translateY(2px); border-bottom-width: 1px; }
.f-lp { background: #fecaca; } .f-lr { background: #fed7aa; } .f-lm { background: #fef08a; } .f-li { background: #bbf7d0; }
.f-ri { background: #a7f3d0; } .f-rm { background: #bae6fd; } .f-rr { background: #c7d2fe; } .f-rp { background: #f5d0fe; }
.f-th { background: #e2e8f0; }
[data-theme="dark"] .key { filter: saturate(.8) brightness(.85); }
.finger-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: .35rem .9rem; margin-top: .6rem; font-size: .72rem; color: var(--clr-text-muted); }
.finger-legend span { display: inline-flex; align-items: center; gap: .3rem; }
.finger-legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

/* Heat map variant */
.kbd.heat .key { background: var(--clr-surface-2); color: var(--clr-text); }

/* =============================================
   RESULTS
   ============================================= */
.results-panel {
  text-align: center;
  padding: 1.5rem 1rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--clr-border);
  background: var(--clr-surface-2);
}
.results-panel[hidden] { display: none; }
.results-title { font-size: 1.5rem; font-weight: 800; margin-bottom: .25rem; }
.results-sub { color: var(--clr-text-muted); margin-bottom: 1rem; }
.big-stars { font-size: 2.4rem; letter-spacing: 6px; color: #f59e0b; margin-bottom: .5rem; }
.big-stars .off { color: var(--clr-border-strong); }
.big-stars span { display: inline-block; animation: pop .45s ease both; }
.big-stars span:nth-child(2) { animation-delay: .15s; }
.big-stars span:nth-child(3) { animation-delay: .3s; }
@keyframes pop { 0% { transform: scale(0); } 70% { transform: scale(1.3); } 100% { transform: scale(1); } }
.result-stats { display: flex; flex-wrap: wrap; justify-content: center; gap: .75rem; margin: 1rem 0; }
.result-stat { min-width: 110px; padding: .7rem 1rem; border-radius: var(--radius-md); background: var(--clr-surface); border: 1px solid var(--clr-border); }
.result-stat strong { display: block; font-size: 1.6rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.result-stat span { font-size: .72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .8px; color: var(--clr-text-muted); }
.xp-gain { display: inline-block; margin: .25rem 0 .75rem; padding: .3rem .9rem; border-radius: 999px; background: var(--clr-pass-bg); color: var(--clr-pass); font-weight: 700; }
.results-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem; margin-top: .75rem; }
.wpm-chart { max-width: 640px; margin: .5rem auto 0; }
.wpm-chart svg { width: 100%; height: auto; display: block; }
.chart-line { fill: none; stroke: var(--clr-primary); stroke-width: 2.5; stroke-linejoin: round; }
.chart-area { fill: var(--clr-primary-light); opacity: .7; }
.chart-axis { stroke: var(--clr-border-strong); stroke-width: 1; }
.chart-label { fill: var(--clr-text-muted); font-size: 11px; font-family: 'Inter', sans-serif; }
.chart-err { fill: #dc2626; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .6rem 1.2rem;
  border-radius: var(--radius-md);
  border: none;
  background: var(--clr-primary);
  color: var(--clr-on-primary);
  font-size: .95rem;
  font-weight: 600;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--rm-primary) 30%, transparent);
}
.btn-primary:hover { background: var(--clr-primary-dark); }

/* =============================================
   WORD RAIN GAME
   ============================================= */
.game-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: radial-gradient(ellipse at top, #1e1b4b, #0b1020 70%);
  height: clamp(360px, 58vh, 560px);
  outline: none;
}
.game-wrap.focused { box-shadow: 0 0 0 4px var(--clr-primary-light); }
.game-wrap canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.game-hud {
  position: absolute;
  top: .75rem; left: .75rem; right: .75rem;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  pointer-events: none;
}
.hud-item {
  padding: .3rem .7rem;
  border-radius: 999px;
  background: rgba(15,23,42,.7);
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.hud-item.lives { margin-left: auto; letter-spacing: 2px; }
.game-typed {
  position: absolute;
  bottom: .9rem; left: 50%;
  transform: translateX(-50%);
  min-width: 160px;
  padding: .45rem 1rem;
  border-radius: 999px;
  background: rgba(15,23,42,.8);
  border: 1px solid rgba(165,180,252,.5);
  color: #fff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.05rem;
  text-align: center;
  pointer-events: none;
}
.game-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  padding: 1.5rem;
  text-align: center;
  color: #fff;
  background: rgba(11,16,32,.72);
  backdrop-filter: blur(3px);
}
.game-overlay[hidden] { display: none; }
.game-overlay h3 { font-size: clamp(1.5rem, 1.1rem + 2vw, 2.4rem); font-weight: 800; }
.game-overlay p { color: #9ebfe0; max-width: 46ch; }
.game-overlay .stats { display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem; margin: .4rem 0; }
.game-overlay .stats span { padding: .35rem .8rem; border-radius: 999px; background: rgba(255,255,255,.12); font-weight: 700; font-size: .85rem; }
.game-overlay .pill-group { border-color: rgba(255,255,255,.35); }
.game-overlay .pill-group button { background: rgba(255,255,255,.08); color: #fff; }
.game-overlay .pill-group button + button { border-color: rgba(255,255,255,.35); }
.game-overlay .pill-group button[aria-pressed="true"] { background: #1a5fb4; }

/* =============================================
   PROGRESS DASHBOARD
   ============================================= */
.stat-tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .75rem; margin-bottom: 1.25rem; }
.stat-tile { padding: .9rem 1rem; border-radius: var(--radius-md); border: 1px solid var(--clr-border); background: var(--clr-surface-2); }
.stat-tile strong { display: block; font-size: 1.6rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.stat-tile span { font-size: .75rem; color: var(--clr-text-muted); font-weight: 600; }
.dash-section { margin-bottom: 1.5rem; }
.dash-section h3 { font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: var(--clr-text-muted); margin-bottom: .75rem; display: flex; align-items: center; gap: .75rem; }
.dash-section h3 .action-btn { margin-left: auto; text-transform: none; letter-spacing: 0; font-size: .8rem; padding: .3rem .75rem; }
.chart-box { border: 1px solid var(--clr-border); border-radius: var(--radius-lg); background: var(--clr-surface-2); padding: .75rem; }
.empty-note { font-size: .88rem; color: var(--clr-text-muted); padding: .5rem 0; }
.badge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: .6rem; }
.badge {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .65rem .8rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
}
.badge .icon { font-size: 1.6rem; line-height: 1; }
.badge .name { font-weight: 700; font-size: .85rem; }
.badge .desc { font-size: .74rem; color: var(--clr-text-muted); }
.badge.locked { opacity: .55; filter: grayscale(1); }
.data-actions { display: flex; flex-wrap: wrap; gap: .5rem; }

/* Confetti + achievement pop-up */
#confetti { position: fixed; inset: 0; pointer-events: none; z-index: 998; }
.achievement-pop {
  position: fixed;
  top: calc(var(--header-h) + 1rem);
  right: 1rem;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .8rem 1.1rem;
  border-radius: var(--radius-lg);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-lg);
  transform: translateX(130%);
  transition: transform .4s cubic-bezier(.2,.9,.3,1.2);
  max-width: calc(100vw - 2rem);
}
.achievement-pop.show { transform: translateX(0); }
.achievement-pop .icon { font-size: 2rem; }
.achievement-pop small { display: block; font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--clr-primary); }
.achievement-pop strong { font-size: .95rem; }

.ref-card p code, .ref-card p kbd {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: .85em;
  background: var(--clr-surface-2);
  padding: .05rem .3rem;
  border-radius: 4px;
}

@media (max-width: 760px) {
  /* Keys share each row's width so the whole keyboard always fits */
  .kbd, .kbd-row { gap: 3px; width: 100%; }
  .kbd-row { justify-content: center; }
  .key { flex: 1 1 0; width: auto; min-width: 0; height: 32px; font-size: .6rem; border-radius: 5px; overflow: hidden; }
  .key.wide { flex-grow: 1.5; font-size: .5rem; }
  .key.wider { flex-grow: 1.9; font-size: .5rem; }
  .key.space { flex: 0 0 55%; }
  .pill-group { flex-wrap: wrap; border-radius: var(--radius-md); }
  .live-stat span { font-size: .58rem; letter-spacing: .3px; }
  .live-stats { margin-left: 0; width: 100%; }
  .live-stat { flex: 1; min-width: 0; }
  .typing-actions .hint { display: none; }
}


/* =============================================
   REFERENCE SECTION (case descriptions)
   ============================================= */
.reference-section {
  padding: 3rem 0;
  background: var(--clr-surface-2);
  border-top: 1px solid var(--clr-border);
}
.reference-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: .5rem;
}
.reference-section .section-subtitle {
  color: var(--clr-text-muted);
  margin-bottom: 2rem;
}
.reference-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.ref-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.4rem;
  transition: box-shadow var(--transition), transform var(--transition);
}
.ref-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.ref-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: .35rem; }
.ref-card .example {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: .85rem;
  background: var(--clr-surface-2);
  color: var(--clr-primary);
  padding: .3rem .6rem;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: .5rem;
}
.ref-card p { font-size: .875rem; color: var(--clr-text-muted); }

/* =============================================
   ABOUT SECTION
   ============================================= */
#about {
  padding: 3.5rem 0;
}
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.about-text h2 { font-size: 1.75rem; font-weight: 800; margin-bottom: 1rem; }
.about-text p { color: var(--clr-text-muted); line-height: 1.8; margin-bottom: .75rem; }
.feature-list { display: flex; flex-direction: column; gap: .65rem; margin-top: 1.25rem; }
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  font-size: .9rem;
}
.feature-icon {
  width: 30px; height: 30px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--clr-primary-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--clr-primary);
  font-size: 1rem;
  margin-top: .05rem;
}
.about-visual {
  background: var(--rm-hero-bg);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  color: #fff;
}
.demo-cases { display: flex; flex-direction: column; gap: .85rem; }
.demo-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,.12);
  border-radius: var(--radius-md);
  padding: .65rem 1rem;
  font-size: .88rem;
  backdrop-filter: blur(4px);
}
.demo-row .label { opacity: .8; font-weight: 500; }
.demo-row .value { font-weight: 700; font-family: 'JetBrains Mono', monospace; }

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding-top: 3rem;
  transition: background var(--transition);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 3rem;
  padding-bottom: 2.5rem;
}
.footer-brand .logo { margin-bottom: .75rem; }
.footer-tagline { font-size: .875rem; color: var(--clr-text-muted); max-width: 260px; line-height: 1.6; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.footer-col h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: 1px; color: var(--clr-text-muted); margin-bottom: .85rem; }
.footer-col li + li { margin-top: .45rem; }
.footer-col a { font-size: .875rem; color: var(--clr-text-muted); transition: color var(--transition); }
.footer-col a:hover { color: var(--clr-primary); text-decoration: none; }
.footer-bottom {
  border-top: 1px solid var(--clr-border);
  padding: 1.25rem 0;
  font-size: .8rem;
  color: var(--clr-text-muted);
}
.footer-bottom .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .field-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: fixed;
    inset: var(--header-h) 0 0;
    background: var(--clr-surface);
    padding: 1.5rem 1.25rem;
    z-index: 99;
    flex-direction: column;
    gap: .35rem;
    border-top: 1px solid var(--clr-border);
  }
  .main-nav.open { display: flex; }
  .main-nav ul { flex-direction: column; }
  .nav-link { font-size: 1.1rem; padding: .75rem 1rem; }
  .btn-mobile-menu { display: flex; }
  .about-inner { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .field-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-links { grid-template-columns: 1fr; }
  .action-bar { gap: .4rem; }
  .action-btn { padding: .45rem .75rem; font-size: .8rem; }
  .about-visual { padding: 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}

/* Keep each stage's hidden input positioned inside it */
.stage { position: relative; }

/* =============================================
   Shared romelmasagca.com tool theme (../shared/rm-tools.css)
   Maps this tool's variables onto the --rm-* tokens, light and dark.
   ============================================= */
:root, :root[data-theme="dark"] {
  --clr-primary:       var(--rm-primary);
  --clr-primary-dark:  var(--rm-primary-hover);
  --clr-primary-light: var(--rm-primary-soft);
  --clr-on-primary:    var(--rm-primary-ink);
  --clr-accent:        var(--rm-amber);
  --clr-focus:         var(--rm-primary);
  --clr-bg:            var(--rm-bg);
  --clr-surface:       var(--rm-surface);
  --clr-surface-2:     var(--rm-surface-2);
  --clr-border:        var(--rm-border);
  --clr-border-strong: var(--rm-muted);
  --clr-text:          var(--rm-text);
  --clr-text-muted:    var(--rm-muted);
  --clr-text-inverse:  var(--rm-bg);
  --radius-sm:  var(--rm-radius-sm);
  --radius-md:  var(--rm-radius);
  --radius-lg:  var(--rm-radius);
  --radius-xl:  var(--rm-radius-lg);
  --shadow-sm:  var(--rm-shadow-sm);
  --shadow-md:  var(--rm-shadow-md);
  --shadow-lg:  var(--rm-shadow-lg);
  --transition: var(--rm-ease);
}
html { scroll-padding-top: 80px; }
/* Hero: the shared blueprint band in both themes */
.hero.rm-hero { background: var(--rm-hero-bg); color: var(--rm-hero-ink); }
.hero.rm-hero h1 { color: var(--rm-hero-ink); -webkit-text-fill-color: currentColor; background: none; font-weight: 700; line-height: 1.1; }
.hero.rm-hero p { color: var(--rm-hero-muted); opacity: 1; }