/* ─── Design Tokens ───────────────────────────────────────────────────────── */
:root {
  --bg: #121213;
  --surface: #1a1a1b;
  --card: #242425;
  --card-hover: #2e2e30;
  --border: #3a3a3c;
  --border-light: #4a4a4c;

  /* Correct letter: teal — distinct from Wordle's green */
  --green: #0f766e;
  --green-bright: #14b8a6;
  --green-glow: rgba(20, 184, 166, 0.25);

  /* Wrong position: golden-orange — less red than previous amber */
  --yellow: #d97706;
  --yellow-bright: #fbbf24;
  --yellow-glow: rgba(251, 191, 36, 0.20);

  /* Not in word: slate (replaces near-black gray) */
  --gray-tile: #334155;
  --gray-text: #818384;

  /* Blue palette for splitter words */
  --blue-accent: #4a90d9;
  --blue-bright: #74b3f5;
  --blue-glow: rgba(74, 144, 217, 0.25);

  --text: #ffffff;
  --text-secondary: #a0a0a2;
  --text-muted: #606062;

  --accent: #14b8a6;
  --accent-dim: #0d5e58;

  --font: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Courier New', monospace;

  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 18px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow-green: 0 0 24px rgba(20, 184, 166, 0.35), 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-glow-yellow: 0 0 24px rgba(251, 191, 36, 0.25), 0 4px 16px rgba(0, 0, 0, 0.4);

  --transition: 0.18s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ─── Header ──────────────────────────────────────────────────────────────── */
#header {
  border-bottom: 1px solid var(--border);
  background: rgba(18, 18, 19, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 1.5rem;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-icon {
  display: none;
}

.logo-g,
.logo-y {
  display: none;
}

/* ─── wrdlcoach Logo ─────────────────────────────────────────────────────── */
.logo-mark {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
  align-items: center;
}

.logo-tile {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 800;
  border-radius: 5px;
  color: #fff;
  text-transform: uppercase;
  user-select: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.logo-mark:hover .logo-tile {
  transform: translateY(-5px);
}

.logo-mark:hover .logo-tile:nth-child(1) {
  transition-delay: 0.00s;
  box-shadow: 0 8px 16px rgba(20, 184, 166, 0.45);
}

.logo-mark:hover .logo-tile:nth-child(2) {
  transition-delay: 0.06s;
  box-shadow: 0 8px 16px rgba(251, 191, 36, 0.45);
}

.logo-mark:hover .logo-tile:nth-child(3) {
  transition-delay: 0.12s;
  box-shadow: 0 8px 16px rgba(71, 85, 105, 0.45);
}

.logo-mark:hover .logo-tile:nth-child(4) {
  transition-delay: 0.18s;
  box-shadow: 0 8px 16px rgba(20, 184, 166, 0.45);
}

.lt-teal {
  background: var(--green);
}

.lt-amber {
  background: var(--yellow);
}

.lt-slate {
  background: #475569;
  border: 2px solid #64748b;
}

.brand-name {
  font-family: var(--mono);
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  margin: 0;
}

.brand-wrdl {
  color: var(--green-bright);
}

.brand-coach {
  color: var(--text);
}

.header-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

.header-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-top: 1px;
}

/* Candidate count badge */
.candidate-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  transition: var(--transition);
  min-width: 80px;
}

.candidate-badge.urgent {
  border-color: var(--yellow);
  background: rgba(181, 159, 59, 0.12);
}

.candidate-badge.solved {
  border-color: var(--green-bright);
  background: rgba(20, 184, 166, 0.12);
}

#candidate-count {
  font-size: 1.5rem;
  font-weight: 800;
  font-family: var(--mono);
  line-height: 1;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.badge-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

/* ─── Main Layout ─────────────────────────────────────────────────────────── */
#main {
  flex: 1;
  padding: 2rem 1.5rem;
}

.layout {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

/* ─── Panels ──────────────────────────────────────────────────────────────── */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.panel-header {
  margin-bottom: 1.25rem;
}

.panel-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.panel-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ─── Legend ──────────────────────────────────────────────────────────────── */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 1.25rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
}

.swatch-gray {
  background: var(--gray-tile);
}

.swatch-yellow {
  background: var(--yellow);
}

.swatch-green {
  background: var(--green);
}

/* ─── Tile Grid ───────────────────────────────────────────────────────────── */
.guess-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 1rem;
}

.tile-row {
  display: flex;
  gap: 6px;
}

/* Generic tile */
.tile {
  width: 52px;
  height: 52px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text);
  background: var(--bg);
  user-select: none;
  transition: background var(--transition), border-color var(--transition),
    transform 0.1s ease, box-shadow var(--transition);
}

/* Committed row tiles (read-only) */
.committed-row .tile {
  cursor: default;
  border-color: transparent;
}

.committed-row .tile.gray {
  background: var(--gray-tile);
  border-color: var(--gray-tile);
}

.committed-row .tile.yellow {
  background: var(--yellow);
  border-color: var(--yellow);
}

.committed-row .tile.green {
  background: var(--green);
  border-color: var(--green);
}

/* Active (editable) row tiles */
.active-tile {
  cursor: pointer;
  border-color: var(--border-light);
}

.active-tile:hover {
  border-color: var(--text-muted);
  transform: scale(1.04);
}

.active-tile:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.active-tile:active {
  transform: scale(0.96);
}

.active-tile.has-letter {
  border-color: var(--gray-text);
}

.active-tile.yellow {
  background: var(--yellow);
  border-color: var(--yellow-bright);
  box-shadow: var(--shadow-glow-yellow);
}

.active-tile.green {
  background: var(--green);
  border-color: var(--green-bright);
  box-shadow: var(--shadow-glow-green);
}

/* Flip animation on color change */
@keyframes flip {
  0% {
    transform: scaleY(1);
  }

  45% {
    transform: scaleY(0);
  }

  55% {
    transform: scaleY(0);
  }

  100% {
    transform: scaleY(1);
  }
}

.tile.flipping {
  animation: flip 0.3s ease;
}

/* Pop animation on letter insert */
@keyframes pop {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.12);
  }

  100% {
    transform: scale(1);
  }
}

.tile.popping {
  animation: pop 0.1s ease;
}

/* ─── Active Row Controls ─────────────────────────────────────────────────── */
.active-row {
  margin-top: 0.5rem;
}

.active-tile-row {
  margin-bottom: 12px;
}

.active-controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background var(--transition), transform 0.1s ease, opacity var(--transition);
  letter-spacing: 0.01em;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn:not(:disabled):hover {
  transform: translateY(-1px);
}

.btn:not(:disabled):active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--green);
  color: #fff;
}

.btn-primary:not(:disabled):hover {
  background: var(--green-bright);
}

.btn-ghost {
  background: var(--card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--card-hover);
  color: var(--text);
}

/* ─── Hints & Errors ──────────────────────────────────────────────────────── */
.input-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

.input-error {
  font-size: 0.8rem;
  color: #ff6b6b;
  background: rgba(255, 107, 107, 0.1);
  border: 1px solid rgba(255, 107, 107, 0.3);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-top: 0.75rem;
}

/* ─── Results Panel ───────────────────────────────────────────────────────── */
.suggestions-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.suggestions-empty p {
  font-size: 0.9rem;
  line-height: 1.6;
}

.empty-sub {
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.highlight {
  color: var(--green-bright);
}

/* Loading spinner */
.suggestions-loading {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 1rem;
  animation: spin 0.8s linear infinite;
}

/* Warning banner */
.warning-banner {
  background: rgba(185, 128, 9, 0.15);
  border: 1px solid rgba(251, 191, 36, 0.4);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.8rem;
  color: var(--yellow-bright);
  margin-bottom: 1rem;
}

/* Suggestion cards */
.suggestions-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.suggestion-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 28px 1fr auto;
  align-items: center;
  gap: 12px;
  transition: background var(--transition), border-color var(--transition),
    transform var(--transition), box-shadow var(--transition);
  cursor: default;
}

.suggestion-card:hover {
  background: var(--card-hover);
  border-color: var(--border-light);
  transform: translateX(3px);
}

/* #1 card gets a green glow */
.suggestion-card.rank-1 {
  border-color: var(--green);
  background: rgba(15, 118, 110, 0.12);
  box-shadow: var(--shadow-glow-green);
}

.suggestion-card.rank-1:hover {
  background: rgba(15, 118, 110, 0.18);
}

.rank-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-align: center;
}

.suggestion-card.rank-1 .rank-num {
  color: var(--green-bright);
}

.suggestion-word-block {
  min-width: 0;
}

.suggestion-word {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.answer-badge {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: rgba(20, 184, 166, 0.15);
  color: var(--green-bright);
  border: 1px solid rgba(20, 184, 166, 0.35);
  border-radius: 4px;
  padding: 1px 5px;
  margin-left: 6px;
  vertical-align: middle;
}

/* Splitter cards — words that cannot be the answer given current constraints */
.suggestion-card.splitter {
  border-color: var(--blue-accent);
  background: rgba(74, 144, 217, 0.10);
  border-left: 3px solid var(--blue-bright);
}

.suggestion-card.splitter:hover {
  border-color: var(--blue-bright);
  background: rgba(74, 144, 217, 0.16);
}

.suggestion-card.splitter .suggestion-word {
  color: var(--blue-bright);
}

.suggestion-card.splitter .entropy-bar-fill {
  background: linear-gradient(90deg, var(--blue-accent), var(--blue-bright));
}

.suggestion-card.splitter .entropy-big {
  color: var(--blue-bright);
}

.suggestion-card.splitter .rank-num {
  color: var(--blue-accent);
}

.suggestion-card.splitter.rank-1 {
  border-color: var(--blue-bright);
  border-left: 3px solid var(--blue-bright);
  background: rgba(74, 144, 217, 0.14);
  box-shadow: 0 0 0 1px rgba(74, 144, 217, 0.25), 0 4px 16px rgba(0, 0, 0, 0.4);
}

.suggestion-card.splitter.rank-1 .rank-num {
  color: var(--blue-bright);
}

.suggestion-card.splitter.rank-1 .entropy-big {
  color: var(--blue-bright);
}

.splitter-badge {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: rgba(74, 144, 217, 0.15);
  color: var(--blue-bright);
  border: 1px solid rgba(74, 144, 217, 0.35);
  border-radius: 4px;
  padding: 1px 5px;
  margin-left: 6px;
  vertical-align: middle;
}

/* Entropy bar */
.entropy-bar-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.entropy-bar-bg {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.entropy-bar-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--green-bright), var(--yellow-bright));
  transition: width 0.5s cubic-bezier(.4, 0, .2, 1);
}

.entropy-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.suggestion-meta {
  text-align: right;
}

.entropy-big {
  font-family: var(--mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.suggestion-card.rank-1 .entropy-big {
  color: var(--green-bright);
}

.entropy-unit {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 2px;
  text-align: right;
}

/* Perf note */
.perf-note {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 0.75rem;
  font-family: var(--mono);
}

/* ─── Panel title row (title + toggle) ───────────────────────────────────── */
.panel-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 4px;
}

.panel-title-row .panel-title {
  margin-bottom: 0;
}

/* ─── Hard Mode Toggle ────────────────────────────────────────────────────── */
.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
}

.toggle-input {
  display: none;
}

.toggle-track {
  position: relative;
  width: 38px;
  height: 22px;
  background: var(--border);
  border-radius: 11px;
  transition: background var(--transition);
  flex-shrink: 0;
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}

.toggle-input:checked+.toggle-track {
  background: var(--green);
}

.toggle-input:checked+.toggle-track .toggle-thumb {
  transform: translateX(16px);
  background: #fff;
}

.toggle-text {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: color var(--transition);
}

.toggle-input:checked~.toggle-text {
  color: var(--green-bright);
}


/* ─── Mode Tabs ───────────────────────────────────────────────────────────── */
.mode-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: 0 1.5rem;
}

.mode-tab {
  padding: 12px 22px;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
  letter-spacing: 0.01em;
  margin-bottom: -1px;
}

.mode-tab:hover {
  color: var(--text-secondary);
}

.mode-tab.active {
  color: var(--text);
  border-bottom-color: var(--green-bright);
}

/* ─── Coach: Start Controls ───────────────────────────────────────────────── */
.coach-start-area {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 1.25rem;
}

.coach-manual-row {
  display: flex;
  gap: 8px;
}

.coach-word-input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  outline: none;
  transition: border-color var(--transition);
}

.coach-word-input:focus {
  border-color: var(--green);
}

.coach-word-input::placeholder {
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-muted);
}

/* ─── Coach: 6×5 Game Grid ────────────────────────────────────────────────── */
.coach-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.coach-grid .tile {
  cursor: default;
}

.coach-grid .tile.gray {
  background: var(--gray-tile);
  border-color: var(--gray-tile);
}

.coach-grid .tile.yellow {
  background: var(--yellow);
  border-color: var(--yellow);
}

.coach-grid .tile.green {
  background: var(--green);
  border-color: var(--green);
}

/* ─── Coach: Grade Card ───────────────────────────────────────────────────── */
.coach-grade-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 1rem;
}

.coach-grade-card-inner {
  display: flex;
  align-items: center;
  gap: 16px;
}

.grade-letter {
  font-family: var(--mono);
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1;
  flex-shrink: 0;
  min-width: 52px;
  text-align: center;
}

.grade-details {
  flex: 1;
  min-width: 0;
}

.grade-label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 3px;
}

.grade-stats {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 7px;
}

.efficiency-bar-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.efficiency-bar-bg {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.efficiency-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s cubic-bezier(.4, 0, .2, 1);
}

.efficiency-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ─── Coach: Alternatives header ─────────────────────────────────────────── */
.coach-alt-header {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

/* ─── Coach: Round history pills ─────────────────────────────────────────── */
.coach-round-history {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-top: 0.75rem;
}

.round-history-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.78rem;
}

.pill-num {
  color: var(--text-muted);
  flex-shrink: 0;
}

.pill-word {
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text);
}

.pill-grade {
  font-weight: 800;
  font-family: var(--mono);
  flex-shrink: 0;
}

.pill-label {
  color: var(--text-secondary);
  flex: 1;
}

.pill-eff {
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

/* ─── Coach: End Banner ───────────────────────────────────────────────────── */
.coach-end-banner {
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  margin-top: 1rem;
}

.coach-end-banner.solved {
  background: rgba(15, 118, 110, 0.2);
  border: 1px solid var(--green);
  color: var(--green-bright);
}

.coach-end-banner.failed {
  background: rgba(181, 59, 59, 0.15);
  border: 1px solid #b53b3b;
  color: #e07070;
}

.overall-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.overall-grade {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  flex-shrink: 0;
}

.overall-details {
  text-align: left;
}

.overall-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
}

.overall-stats {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ─── Footer ──────────────────────────────────────────────────────────────── */

#footer {
  border-top: 1px solid var(--border);
  padding: 1rem 1.5rem;
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ─── Utility ─────────────────────────────────────────────────────────────── */
.hidden {
  display: none !important;
}

kbd {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: var(--mono);
  font-size: 0.75em;
}

strong {
  color: var(--text);
}

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .header-inner {
    height: 60px;
  }

  .header-title {
    font-size: 1rem;
  }

  .header-sub {
    display: none;
  }

  .panel {
    padding: 1.25rem;
  }

  .tile {
    width: 46px;
    height: 46px;
    font-size: 1.05rem;
  }

  #main {
    padding: 1rem;
  }
}

@media (max-width: 380px) {
  .tile {
    width: 40px;
    height: 40px;
    font-size: 0.9rem;
  }
}

/* ─── Mobile Keyboard ───────────────────────────────────────────────────────── */
.coach-keyboard {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
  width: 100%;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  user-select: none;
}

.keyboard-row {
  display: flex;
  justify-content: center;
  gap: 6px;
}

.key {
  flex: 1;
  height: 52px;
  border-radius: 4px;
  border: 0;
  background-color: var(--border);
  color: var(--text);
  font-weight: 700;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.1s;
  padding: 0;
}

.key:active {
  opacity: 0.7;
}

.key.key-wide {
  flex: 1.5;
  font-size: 0.9rem;
}

.spacer {
  flex: 0.5;
}

/* Keyboard state colors */
.key.correct {
  background-color: var(--green);
  color: #fff;
}

.key.present {
  background-color: var(--yellow);
  color: #fff;
}

.key.absent {
  background-color: var(--gray-dark);
  color: #fff;
}