/* ==========================================================================
   SomeChess — design tokens & shared components ("estudio sereno" theme:
   matte minimal glassmorphism). Single source of truth for visual style.

   Rationale lives in .claude/skills/chess-tutor-style/SKILL.md — read it
   before adding a new token or component class. Do not invent one-off
   styles per screen; extend this file so every module stays consistent.
   ========================================================================== */

:root {
  color-scheme: light;

  /* --- base surfaces (light) --- */
  --bg-grad-1: #eef2f8;
  --bg-grad-2: #e6ebf4;
  --bg-grad-3: #eef4f2;
  --surface: rgba(255, 255, 255, 0.42);
  --surface-strong: rgba(255, 255, 255, 0.78);
  --surface-border: rgba(24, 33, 51, 0.12);
  --surface-border-strong: rgba(24, 33, 51, 0.18);

  /* --- text --- */
  --text: #1c2434;
  --text-dim: #5c6780;
  --text-on-accent: #ffffff;

  /* --- semantic accents ---
     accent  = cool, used for every interactive/neutral-focus element
     insight = warm, RESERVED for reveal/explanation/"you saw it right" moments
     success/caution/danger = feedback triad, reused by Phase 2 error severity */
  --accent: #2f7a82;
  --accent-strong: #23616a;
  --accent-soft: rgba(47, 122, 130, 0.14);
  --insight: #b8862c;
  --insight-soft: rgba(184, 134, 44, 0.16);
  --success: #3f8f5f;
  --success-soft: rgba(63, 143, 95, 0.15);
  --caution: #c07a2e;
  --caution-soft: rgba(192, 122, 46, 0.16);
  --danger: #b8433f;
  --danger-soft: rgba(184, 67, 63, 0.14);
  --focus-ring: #2f7fb8;
  --mode-serious: #4c6579;
  --mode-serious-soft: rgba(76, 101, 121, 0.14);
  --mode-serious-border: rgba(76, 101, 121, 0.24);
  --mode-coaching: #a66b29;
  --mode-coaching-soft: rgba(166, 107, 41, 0.16);
  --mode-coaching-border: rgba(166, 107, 41, 0.25);

  /* --- shape --- */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* --- spacing (4px base) --- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  /* --- glass surface --- */
  --blur-glass: 28px;
  --glass-saturate: saturate(1.5);
  --shadow-glass: 0 10px 34px rgba(20, 30, 50, 0.13), 0 1px 2px rgba(20, 30, 50, 0.07);
  --shadow-glass-strong: 0 18px 48px rgba(20, 30, 50, 0.20), 0 2px 4px rgba(20, 30, 50, 0.10);

  /* --- type --- */
  --font-sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;

  /* --- motion --- */
  --ease-serene: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 220ms;
}

/* --- dark theme: system preference, unless an explicit choice overrides it --- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg-grad-1: #12151d;
    --bg-grad-2: #171b26;
    --bg-grad-3: #141a1a;
    --surface: rgba(255, 255, 255, 0.09);
    --surface-strong: rgba(255, 255, 255, 0.24);
    --surface-border: rgba(255, 255, 255, 0.14);
    --surface-border-strong: rgba(255, 255, 255, 0.20);

    --text: #e8ebf2;
    --text-dim: #98a1b8;

    --accent: #5db3ba;
    --accent-strong: #7ecbd1;
    --accent-soft: rgba(93, 179, 186, 0.18);
    --insight: #e0b559;
    --insight-soft: rgba(224, 181, 89, 0.18);
    --success: #63c088;
    --success-soft: rgba(99, 192, 136, 0.16);
    --caution: #e0975a;
    --caution-soft: rgba(224, 151, 90, 0.16);
    --danger: #e0736b;
    --danger-soft: rgba(224, 115, 107, 0.16);
    --focus-ring: #6fb3e0;
    --mode-serious: #94adca;
    --mode-serious-soft: rgba(148, 173, 202, 0.18);
    --mode-serious-border: rgba(148, 173, 202, 0.28);
    --mode-coaching: #efc47a;
    --mode-coaching-soft: rgba(239, 196, 122, 0.18);
    --mode-coaching-border: rgba(239, 196, 122, 0.28);

    --shadow-glass: 0 10px 34px rgba(0, 0, 0, 0.38), 0 1px 2px rgba(0, 0, 0, 0.26);
    --shadow-glass-strong: 0 18px 48px rgba(0, 0, 0, 0.48), 0 2px 4px rgba(0, 0, 0, 0.30);
  }
}

/* --- dark theme: explicit user choice, wins over system preference either way --- */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg-grad-1: #12151d;
  --bg-grad-2: #171b26;
  --bg-grad-3: #141a1a;
  --surface: rgba(255, 255, 255, 0.09);
  --surface-strong: rgba(255, 255, 255, 0.24);
  --surface-border: rgba(255, 255, 255, 0.14);
  --surface-border-strong: rgba(255, 255, 255, 0.20);

  --text: #e8ebf2;
  --text-dim: #98a1b8;

  --accent: #5db3ba;
  --accent-strong: #7ecbd1;
  --accent-soft: rgba(93, 179, 186, 0.18);
  --insight: #e0b559;
  --insight-soft: rgba(224, 181, 89, 0.18);
  --success: #63c088;
  --success-soft: rgba(99, 192, 136, 0.16);
  --caution: #e0975a;
  --caution-soft: rgba(224, 151, 90, 0.16);
  --danger: #e0736b;
  --danger-soft: rgba(224, 115, 107, 0.16);
  --focus-ring: #6fb3e0;
  --mode-serious: #94adca;
  --mode-serious-soft: rgba(148, 173, 202, 0.18);
  --mode-serious-border: rgba(148, 173, 202, 0.28);
  --mode-coaching: #efc47a;
  --mode-coaching-soft: rgba(239, 196, 122, 0.18);
  --mode-coaching-border: rgba(239, 196, 122, 0.28);

  --shadow-glass: 0 10px 34px rgba(0, 0, 0, 0.38), 0 1px 2px rgba(0, 0, 0, 0.26);
  --shadow-glass-strong: 0 18px 48px rgba(0, 0, 0, 0.48), 0 2px 4px rgba(0, 0, 0, 0.30);
}

/* ==========================================================================
   Base
   ========================================================================== */

* { box-sizing: border-box; }

html {
  color-scheme: inherit;
  /* Mobile app conventions (this app is used mostly on the phone — see
     .claude/skills/chess-tutor-style/SKILL.md): no double-tap-zoom or blue tap
     flash on buttons/links, no rubber-band scroll fighting the board drag. */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  overscroll-behavior-y: none;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px; /* iOS Safari auto-zooms into inputs below 16px — never go smaller */
  color: var(--text);
  background:
    radial-gradient(1100px 700px at 8% -10%, var(--bg-grad-3) 0%, transparent 60%),
    radial-gradient(900px 600px at 100% 0%, var(--bg-grad-2) 0%, transparent 55%),
    var(--bg-grad-1);
  background-attachment: fixed;
  transition: background-color var(--duration-base) var(--ease-serene);
  overscroll-behavior-y: none;
}

button, a, input, textarea, select { -webkit-tap-highlight-color: transparent; }
/* Buttons/links are tap targets, not text — no accidental text-selection on long-press. */
button, a, .btn, .tab-bar a { -webkit-user-select: none; user-select: none; }

h1, h2, h3 { margin: 0; font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1rem; color: var(--text-dim); font-weight: 600; }

.hidden { display: none !important; }

::selection { background: var(--accent-soft); }

*:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.001ms !important; animation-duration: 0.001ms !important; }
}

/* ==========================================================================
   Glass surfaces — matte: blur + translucency only, no gloss/shine overlay
   ========================================================================== */

.glass-panel {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(var(--blur-glass)) var(--glass-saturate);
  -webkit-backdrop-filter: blur(var(--blur-glass)) var(--glass-saturate);
}

.glass-panel--strong {
  background: var(--surface-strong);
  border: 1px solid var(--surface-border-strong);
  border-color: var(--surface-border-strong);
  box-shadow: var(--shadow-glass-strong);
  backdrop-filter: blur(calc(var(--blur-glass) * 0.9)) var(--glass-saturate);
  -webkit-backdrop-filter: blur(calc(var(--blur-glass) * 0.9)) var(--glass-saturate);
}

.glass-panel--flat {
  /* Small chips/rows: same material, less elevation. */
  box-shadow: none;
  border-radius: var(--radius-md);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 10px 18px;
  color: var(--text-on-accent);
  background: var(--accent);
  transition: transform var(--duration-fast) var(--ease-serene),
              filter var(--duration-fast) var(--ease-serene),
              opacity var(--duration-fast) var(--ease-serene);
}
.btn:hover { filter: brightness(1.06); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: default; transform: none; filter: none; }

.btn-secondary {
  background: var(--surface-strong);
  color: var(--text);
  border-color: var(--surface-border-strong);
  backdrop-filter: blur(var(--blur-glass)) var(--glass-saturate);
  -webkit-backdrop-filter: blur(var(--blur-glass)) var(--glass-saturate);
}

.btn-danger {
  background: var(--danger);
  color: var(--text-on-accent);
}

.btn-block { width: 100%; }

/* ==========================================================================
   Forms — native controls, styled minimally (accent-color covers
   radios/checkboxes without reinventing accessible widgets)
   ========================================================================== */

label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: var(--space-1);
}

input[type="text"],
input[type="password"],
input[type="number"],
textarea {
  font: inherit;
  width: 100%;
  color: var(--text);
  background: var(--surface-strong);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  backdrop-filter: blur(var(--blur-glass)) var(--glass-saturate);
  -webkit-backdrop-filter: blur(var(--blur-glass)) var(--glass-saturate);
  transition: border-color var(--duration-fast) var(--ease-serene),
    box-shadow var(--duration-fast) var(--ease-serene);
}
input[type="text"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

textarea { resize: vertical; }

input[type="radio"],
input[type="checkbox"] {
  accent-color: var(--accent);
}

fieldset { border: none; padding: 0; margin: 0 0 var(--space-4); }

.radio-row { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-2); }
.radio-row label {
  display: flex; align-items: center; gap: 6px;
  color: var(--text); font-size: 0.9rem; margin: 0; font-weight: 500;
}

/* ==========================================================================
   Chips, badges, status
   ========================================================================== */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--surface-strong);
  border: 1px solid var(--surface-border);
  font-variant-numeric: tabular-nums;
  transition: background var(--duration-fast) var(--ease-serene),
              color var(--duration-fast) var(--ease-serene);
}
.chip--accent-active { background: var(--accent-soft); color: var(--accent-strong); border-color: transparent; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--surface-strong);
  color: var(--text-dim);
}
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-caution { background: var(--caution-soft); color: var(--caution); }
.badge-danger  { background: var(--danger-soft);  color: var(--danger); }
.badge-insight { background: var(--insight-soft); color: var(--insight); }
.badge-mode-serious { background: var(--mode-serious-soft); color: var(--mode-serious); }
.badge-mode-coaching { background: var(--mode-coaching-soft); color: var(--mode-coaching); }

.status-banner {
  text-align: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--surface-border);
  transition: background var(--duration-fast) var(--ease-serene), color var(--duration-fast) var(--ease-serene);
}
.status-banner--danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }

.field-note {
  color: var(--text-dim);
  font-size: 0.82rem;
  margin-top: var(--space-2);
}

.mono-inline {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ==========================================================================
   Guided-practice panels (live coaching, candidate gate, bot tutoring)
   ========================================================================== */

.coach-panel,
.gate-panel {
  padding: var(--space-4);
  margin-bottom: var(--space-3);
}

.gate-panel textarea {
  min-height: 90px;
  margin-top: var(--space-3);
}

.coaching-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.coaching-head h3 {
  margin: 0;
  font-size: 1rem;
}

.coaching-head p {
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: 0.82rem;
}

.coach-text {
  margin: 0;
}

.coach-pv {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--surface-border);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--text-dim);
}

.coach-save {
  margin: var(--space-3) 0 0;
}

.coach-panel-note {
  margin: var(--space-3) 0 0;
  color: var(--text-dim);
  font-size: 0.78rem;
  line-height: 1.45;
}

.coach-panel-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-3);
}

.gate-hint {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: var(--space-2);
}

.gate-step-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-2);
}

.gate-step-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--surface-border-strong);
  transition: transform var(--duration-fast) var(--ease-serene),
    background var(--duration-fast) var(--ease-serene);
}

.gate-step-dot.active {
  background: var(--accent);
  transform: scale(1.1);
}

.chip-choice-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.chip-choice {
  font: inherit;
  border: 1px solid var(--surface-border-strong);
  border-radius: var(--radius-pill);
  background: var(--surface-strong);
  color: var(--text);
  padding: 8px 12px;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-serene),
    border-color var(--duration-fast) var(--ease-serene),
    background var(--duration-fast) var(--ease-serene);
}

.chip-choice:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.chip-choice.selected {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-strong);
  font-weight: 600;
}

.chip-choice.candidate-chip {
  background: var(--surface);
}

.chip-choice.candidate-chip::after {
  content: " ×";
  color: var(--text-dim);
}

/* ==========================================================================
   Mode guides (Serious vs Coaching onboarding)
   ========================================================================== */

.mode-guide {
  --mode-guide-accent: var(--mode-serious);
  --mode-guide-soft: var(--mode-serious-soft);
  --mode-guide-border: var(--mode-serious-border);
  position: relative;
  overflow: hidden;
  margin-top: var(--space-3);
  padding: 14px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--mode-guide-soft), var(--surface) 38%, rgba(255, 255, 255, 0) 100%);
  border: 1px solid var(--mode-guide-border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.26);
}

.mode-guide::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background: linear-gradient(90deg, var(--mode-guide-accent), transparent 82%);
}

.mode-guide[data-mode="serious"] {
  --mode-guide-accent: var(--mode-serious);
  --mode-guide-soft: var(--mode-serious-soft);
  --mode-guide-border: var(--mode-serious-border);
}

.mode-guide[data-mode="coaching"] {
  --mode-guide-accent: var(--mode-coaching);
  --mode-guide-soft: var(--mode-coaching-soft);
  --mode-guide-border: var(--mode-coaching-border);
}

.mode-guide-header {
  display: block;
}

.mode-guide-heading {
  min-width: 0;
}

.mode-guide-title-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.mode-guide-title {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.2;
}

.mode-guide-badge {
  flex: 0 0 auto;
  white-space: nowrap;
}

.mode-guide-subtitle {
  margin: 6px 0 0;
  color: var(--text-dim);
  font-size: 0.82rem;
  line-height: 1.35;
}

.mode-guide-body {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.mode-guide-row {
  position: relative;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: flex-start;
}

.mode-guide-row::after {
  content: "";
  position: absolute;
  left: 15px;
  top: 33px;
  bottom: 3px;
  width: 1px;
  background: linear-gradient(180deg, var(--mode-guide-border), transparent);
}

.mode-guide-row:last-child::after {
  display: none;
}

.mode-guide-row-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--mode-guide-border);
  background: linear-gradient(180deg, var(--surface-strong), rgba(255, 255, 255, 0.08));
  color: var(--mode-guide-accent);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  flex: 0 0 auto;
}

.mode-guide-row-copy {
  min-width: 0;
  padding: 0 0 9px;
  border-bottom: 1px solid var(--surface-border);
}

.mode-guide-row:last-child .mode-guide-row-copy {
  padding-bottom: 0;
  border-bottom: none;
}

.mode-guide-label {
  display: block;
  font-size: 0.69rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--mode-guide-accent);
  margin-bottom: 1px;
}

.mode-guide-value {
  font-size: 0.86rem;
  color: var(--text);
  line-height: 1.36;
}

.mode-guide-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 12px;
}

.mode-guide-pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 9px;
  border-radius: var(--radius-pill);
  background: var(--surface-strong);
  border: 1px solid var(--surface-border);
  color: var(--mode-guide-accent);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1;
}

.setup-switcher {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-3);
}

.setup-switcher-btn {
  font: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--surface-border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition:
    border-color var(--duration-fast) var(--ease-serene),
    background var(--duration-fast) var(--ease-serene),
    color var(--duration-fast) var(--ease-serene);
}

.setup-switcher-btn.active {
  background: var(--surface-strong);
  border-color: var(--mode-guide-border);
  color: var(--mode-guide-accent);
}

.setup-pane {
  margin-top: var(--space-3);
}

.setup-pane .mode-guide {
  margin-top: 0;
}

.setup-pane-card {
  padding: var(--space-4);
  border: 1px solid var(--surface-border);
}

.setup-collapse-btn {
  width: 100%;
  min-height: 40px;
  padding: 8px 12px;
  justify-content: space-between;
  gap: var(--space-2);
}

.setup-collapse-btn-title {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  font-weight: 600;
  color: var(--text);
  font-size: 0.84rem;
}

.setup-collapse-btn-icon {
  flex: 0 0 auto;
  font-size: 0.92rem;
  color: var(--text-dim);
}

.queue-panel {
  margin-top: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--surface-border);
}

.queue-status {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text);
}

.queue-status-meta {
  margin: var(--space-2) 0 0;
  color: var(--text-dim);
  font-size: 0.82rem;
  line-height: 1.45;
}

.queue-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-3);
}

.queue-actions .btn {
  flex: 1 1 180px;
}

.sparring-grid {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.sparring-card {
  width: 100%;
  text-align: left;
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition:
    border-color var(--duration-base) var(--ease-serene),
    transform var(--duration-base) var(--ease-serene),
    box-shadow var(--duration-base) var(--ease-serene),
    background var(--duration-base) var(--ease-serene);
}

.sparring-card:hover,
.sparring-card:focus-visible {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-glass);
}

.sparring-card.selected {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-soft), var(--surface) 45%);
}

.sparring-card.recommended {
  box-shadow: inset 0 0 0 1px var(--insight-soft);
}

.sparring-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.sparring-card-title {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 700;
}

.sparring-card-summary {
  margin: var(--space-2) 0 0;
  color: var(--text-dim);
  font-size: 0.85rem;
  line-height: 1.5;
}

.sparring-card-foot {
  margin-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ==========================================================================
   Progress surfaces (Phase 3 — placement, Glicko-2, weakness direction)
   ========================================================================== */

.progress-hero {
  padding: var(--space-5);
  text-align: center;
}

.progress-hero-number {
  font-size: 2.5rem;
  line-height: 1;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.progress-hero-label {
  margin-top: var(--space-2);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.progress-hero-sub {
  margin-top: var(--space-2);
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--text-dim);
}

.progress-chip-row {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.progress-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.progress-stat {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  border: 1px solid var(--surface-border);
}

.progress-stat-label {
  display: block;
  margin-bottom: 4px;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  font-weight: 700;
}

.progress-stat-value {
  font-size: 1rem;
  color: var(--text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.progress-meter-panel {
  margin-top: var(--space-4);
  padding: var(--space-4);
}

.progress-meter-panel h3,
.progress-history h3 {
  margin: 0;
  font-size: 0.98rem;
}

.progress-meter-panel > p,
.progress-history > p {
  margin: var(--space-2) 0 0;
  color: var(--text-dim);
  font-size: 0.84rem;
}

.progress-meter-row {
  margin-top: var(--space-3);
}

.progress-meter-head {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: 0.88rem;
  color: var(--text);
}

.progress-meter-track {
  height: 10px;
  margin-top: 6px;
  border-radius: var(--radius-pill);
  background: var(--surface-strong);
  overflow: hidden;
}

.progress-meter-fill {
  height: 100%;
  width: 0;
  border-radius: var(--radius-pill);
  background: var(--accent);
  transition: width var(--duration-base) var(--ease-serene);
}

.progress-meter-fill.caution { background: var(--caution); }
.progress-meter-fill.serious { background: var(--mode-serious); }
.progress-meter-fill.coaching { background: var(--mode-coaching); }

.progress-history {
  margin-top: var(--space-4);
}

.progress-event-list {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.progress-event {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  border: 1px solid var(--surface-border);
}

.progress-event-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
}

.progress-event-title {
  font-size: 0.92rem;
  color: var(--text);
  font-weight: 600;
}

.progress-event-sub {
  margin-top: 4px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.progress-empty {
  margin: var(--space-3) 0 0;
  color: var(--text-dim);
  font-size: 0.88rem;
  line-height: 1.5;
}

/* ==========================================================================
   Floating coach dialog (non-blocking pop-up for tutoring moments)
   ========================================================================== */

.coach-dialog {
  position: fixed;
  right: clamp(16px, 4vw, 32px);
  bottom: calc(92px + env(safe-area-inset-bottom));
  width: min(92vw, 430px);
  z-index: 40;
  pointer-events: none;
}

.coach-dialog:not(.hidden) {
  animation: coach-dialog-rise var(--duration-base) var(--ease-serene);
}

.coach-dialog-card {
  position: relative;
  padding: var(--space-4);
  pointer-events: auto;
  overflow: hidden;
  box-shadow: var(--shadow-glass-strong), 0 18px 46px rgba(19, 30, 44, 0.24);
  border: 1px solid var(--surface-border-strong);
  background:
    radial-gradient(circle at top right, rgba(74, 111, 165, 0.22), transparent 42%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.26), rgba(255, 255, 255, 0.14)),
    var(--surface-strong);
}

.coach-dialog-card::after {
  content: "";
  position: absolute;
  right: 30px;
  bottom: -8px;
  width: 16px;
  height: 16px;
  border-right: 1px solid var(--surface-border-strong);
  border-bottom: 1px solid var(--surface-border-strong);
  background: var(--surface-strong);
  transform: rotate(45deg);
}

.coach-dialog-close {
  width: 32px;
  height: 32px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-dim);
  font-size: 1.05rem;
  padding: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    border-color var(--duration-fast) var(--ease-serene),
    background var(--duration-fast) var(--ease-serene),
    color var(--duration-fast) var(--ease-serene);
}

.coach-dialog-close:hover,
.coach-dialog-close:focus-visible {
  border-color: var(--surface-border-strong);
  background: rgba(255, 255, 255, 0.14);
  color: var(--text);
}

@keyframes coach-dialog-rise {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 520px) {
  .progress-grid {
    grid-template-columns: 1fr;
  }

  .mode-guide {
    padding: 13px;
  }

  .mode-guide-title {
    font-size: 0.92rem;
  }

  .mode-guide-subtitle {
    font-size: 0.8rem;
    line-height: 1.32;
  }

  .mode-guide-row {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 9px;
  }

  .mode-guide-row::after {
    left: 14px;
    top: 31px;
  }

  .mode-guide-row-marker {
    width: 28px;
    height: 28px;
    font-size: 0.66rem;
  }

  .mode-guide-value {
    font-size: 0.84rem;
    line-height: 1.3;
  }

  .mode-guide-pill {
    padding: 5px 8px;
    font-size: 0.7rem;
  }

  .setup-switcher {
    gap: 7px;
  }

  .setup-switcher-btn {
    flex: 1 1 0;
    min-height: 36px;
    padding: 7px 10px;
    font-size: 0.82rem;
  }

  .setup-pane-card {
    padding: 12px;
  }

  .setup-collapse-btn {
    min-height: 38px;
    padding: 7px 11px;
  }

  .coach-dialog {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }

  .coach-dialog:not(.hidden) {
    animation: coach-dialog-rise-mobile var(--duration-base) var(--ease-serene);
  }
}

@keyframes coach-dialog-rise-mobile {
  from {
    opacity: 0;
    transform: translate(-50%, 18px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
  }
}

/* ==========================================================================
   Reveal panel — the moment analysis unlocks after the Botvinnik gate
   (post-game review, candidate gate, etc.). Uses --insight per the
   reveal-moment rule in the style skill: never used decoratively elsewhere.
   ========================================================================== */

.reveal-panel {
  border-color: var(--insight);
  box-shadow: var(--shadow-glass-strong), inset 0 0 0 1px var(--insight-soft);
}
.reveal-panel .reveal-label {
  display: block;
  font-size: 0.78rem;
  color: var(--insight);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-top: var(--space-3);
}
.reveal-panel .reveal-label:first-child { margin-top: 0; }
.reveal-panel .reveal-value {
  display: block;
  font-size: 1rem;
  color: var(--text);
}
.reveal-panel .reveal-value.mono { font-family: var(--font-mono); font-size: 0.88rem; }
.reveal-panel .reveal-explanation {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--surface-border);
  color: var(--text-dim);
  font-size: 0.88rem;
  font-style: italic;
}
/* Short memorable takeaway (distinct from .reveal-explanation's longer prose)
   -- not italic/dim on purpose, meant to stand out as the one thing worth
   remembering, e.g. for a future Woodpecker practice hint. */
.reveal-panel .reveal-tip {
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--insight-soft);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
}

/* ==========================================================================
   Toast
   ========================================================================== */

.toast {
  position: fixed;
  bottom: 92px; /* clears the fixed .tab-bar on pages that have one */
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-serene),
              transform var(--duration-base) var(--ease-serene);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ==========================================================================
   Theme toggle button
   ========================================================================== */

.theme-toggle-btn {
  width: 38px;
  height: 38px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  font-size: 1.05rem;
  line-height: 1;
}

/* ==========================================================================
   Small icon buttons (move navigator, etc.)
   ========================================================================== */

.btn-icon {
  width: 40px;  /* close to the 44px min. touch target guideline (iOS HIG / Material) */
  height: 40px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  line-height: 1;
}

/* ==========================================================================
   Move list navigator — browse past positions, chess.com-style
   ========================================================================== */

.move-nav {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-2);
}

.move-row {
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-serene);
}
.move-row:hover { background: var(--surface-strong); }
.move-ply {
  border-radius: 4px;
  padding: 0 3px;
}
.move-ply.viewing { background: var(--accent-soft); color: var(--accent-strong); font-weight: 700; }

/* ==========================================================================
   Bottom tab bar — primary navigation, mobile-first (this app is used mostly
   on the phone). Fixed to the viewport bottom like a native app. Pages using
   it need extra bottom padding (~76px) on their outermost scroll container so
   content doesn't sit under the bar — see .page-with-tabbar below.
   ========================================================================== */

.page-with-tabbar { padding-bottom: 84px !important; }

.tab-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 40;
  display: flex;
  background: var(--surface-strong);
  border-top: 1px solid var(--surface-border);
  backdrop-filter: blur(var(--blur-glass)) var(--glass-saturate);
  -webkit-backdrop-filter: blur(var(--blur-glass)) var(--glass-saturate);
  padding-bottom: env(safe-area-inset-bottom);
}

.tab-bar a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 10px 4px 8px;
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.72rem;
  font-weight: 600;
  transition: color var(--duration-fast) var(--ease-serene);
}
.tab-bar a .tab-icon { font-size: 1.35rem; line-height: 1; }
.tab-bar a.active { color: var(--accent); }