/* ─────────────────────────────────────────────────────────────
   Sound Knot — type + color tokens
   Cool technical, near-black, single amber accent
   ───────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&family=Instrument+Serif:ital@0;1&display=swap');

:root {
  /* Paper / ink — light mode */
  --gk-paper: #F4F3EE;
  --gk-paper-2: #ECEAE2;
  --gk-ink: #0B0C0E;
  --gk-ink-2: #232528;
  --gk-ink-3: #5B5E64;
  --gk-ink-4: #8B8E94;
  --gk-hair: rgba(11, 12, 14, 0.10);
  --gk-hair-2: rgba(11, 12, 14, 0.06);

  /* Accent — precise amber */
  --gk-accent: oklch(0.72 0.18 55);
  --gk-accent-soft: oklch(0.72 0.18 55 / 0.14);
  --gk-accent-ink: oklch(0.35 0.14 55);

  /* Signals (kept grayscale, accent = amber only) */
  --gk-positive: oklch(0.55 0.12 155);
  --gk-negative: oklch(0.58 0.18 25);

  --gk-sans: 'Inter Tight', -apple-system, system-ui, sans-serif;
  --gk-mono: 'JetBrains Mono', ui-monospace, monospace;
  --gk-serif: 'Instrument Serif', 'Times New Roman', serif;
}

.gk-dark {
  --gk-paper: #0B0C0E;
  --gk-paper-2: #16181C;
  --gk-ink: #F4F3EE;
  --gk-ink-2: #D6D4CC;
  --gk-ink-3: #8F9298;
  --gk-ink-4: #5B5E64;
  --gk-hair: rgba(244, 243, 238, 0.12);
  --gk-hair-2: rgba(244, 243, 238, 0.06);
  --gk-accent-soft: oklch(0.72 0.18 55 / 0.18);
  --gk-accent-ink: oklch(0.85 0.15 55);
}

/* ── Base inside a device frame ─────────────────────────────── */
.gk-app {
  font-family: var(--gk-sans);
  color: var(--gk-ink);
  background: var(--gk-paper);
  font-feature-settings: 'ss01', 'cv11';
  letter-spacing: -0.005em;
  height: 100%;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  -webkit-font-smoothing: antialiased;
}
.gk-mono { font-family: var(--gk-mono); letter-spacing: 0; }
.gk-serif { font-family: var(--gk-serif); letter-spacing: -0.01em; }
.gk-up { text-transform: uppercase; letter-spacing: 0.08em; }

/* ── Hairlines and chrome ───────────────────────────────────── */
.gk-hair { border-top: 1px solid var(--gk-hair); }
.gk-hair-b { border-bottom: 1px solid var(--gk-hair); }

/* ── Scrollbar hide for scrollable panels inside frames ─────── */
.gk-scroll { overflow-y: auto; scrollbar-width: none; }
.gk-scroll::-webkit-scrollbar { display: none; }

/* ── Buttons ────────────────────────────────────────────────── */
.gk-btn {
  font-family: var(--gk-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border: none; outline: none;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  transition: transform 0.08s ease, background 0.15s ease, color 0.15s ease;
}
.gk-btn:active { transform: scale(0.98); }
.gk-btn-primary {
  background: var(--gk-ink);
  color: var(--gk-paper);
  padding: 14px 18px;
  border-radius: 10px;
  width: 100%;
}
.gk-btn-ghost {
  background: transparent;
  color: var(--gk-ink);
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--gk-hair);
}
.gk-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 8px; border-radius: 6px;
  font-family: var(--gk-mono);
  font-size: 10.5px; letter-spacing: 0.02em;
  background: var(--gk-paper-2);
  color: var(--gk-ink-2);
  border: 1px solid var(--gk-hair-2);
  text-transform: uppercase;
  white-space: nowrap;
  flex-shrink: 0;
}
.gk-chip > * { flex-shrink: 0; }

/* ── Inputs ─────────────────────────────────────────────────── */
.gk-input {
  width: 100%;
  background: var(--gk-paper-2);
  border: 1px solid var(--gk-hair);
  border-radius: 10px;
  padding: 14px 14px;
  font-family: var(--gk-mono);
  font-size: 13px;
  color: var(--gk-ink);
  outline: none;
  letter-spacing: 0;
  box-sizing: border-box;
}
.gk-input:focus { border-color: var(--gk-ink); background: var(--gk-paper); }
.gk-input::placeholder { color: var(--gk-ink-4); }

/* ── Number markers (1/4, etc) ──────────────────────────────── */
.gk-marker {
  font-family: var(--gk-mono);
  font-size: 10px;
  color: var(--gk-ink-4);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── Knot motif container ───────────────────────────────────── */
.gk-knot-wrap { position: relative; display: flex; align-items: center; justify-content: center; }

/* ── Transcript text states ─────────────────────────────────── */
.gk-word { transition: color 0.2s ease, background 0.2s ease; }
.gk-word-active {
  background: var(--gk-accent-soft);
  color: var(--gk-ink);
  border-radius: 3px;
  padding: 0 2px;
  margin: 0 -2px;
}
.gk-word-muted { color: var(--gk-ink-4); }
.gk-word-hidden {
  color: transparent;
  background: linear-gradient(180deg, var(--gk-ink-3) 0%, var(--gk-ink-3) 100%);
  background-size: 100% 2px;
  background-position: 0 90%;
  background-repeat: no-repeat;
  border-radius: 2px;
}

/* ── Waveform bars ──────────────────────────────────────────── */
.gk-wave-bar {
  background: var(--gk-ink-2);
  border-radius: 1px;
  width: 2px;
  transition: background 0.1s ease;
}
.gk-wave-bar.played { background: var(--gk-ink); }
.gk-wave-bar.future { background: var(--gk-ink-4); opacity: 0.35; }

/* ── Tabs (bottom nav) ──────────────────────────────────────── */
.gk-tab {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 8px 0 4px;
  color: var(--gk-ink-4);
  font-family: var(--gk-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  border: none; background: transparent;
}
.gk-tab.active { color: var(--gk-ink); }

/* ── Dictation diff ─────────────────────────────────────────── */
.gk-diff-correct { color: var(--gk-ink); }
.gk-diff-missed {
  color: var(--gk-negative);
  text-decoration: underline;
  text-decoration-style: wavy;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.gk-diff-extra {
  color: var(--gk-ink-4);
  text-decoration: line-through;
}
.gk-diff-blank {
  display: inline-block;
  min-width: 40px;
  border-bottom: 1.5px dashed var(--gk-ink-4);
  height: 1em;
}

/* ── Progress bar thin ──────────────────────────────────────── */
.gk-progress {
  height: 2px;
  background: var(--gk-hair);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}
.gk-progress-fill {
  height: 100%;
  background: var(--gk-ink);
  transition: width 0.25s ease;
}

/* ── Streak squares ─────────────────────────────────────────── */
.gk-streak-cell {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 2px;
  background: var(--gk-hair);
  position: relative;
}
.gk-streak-cell.done {
  background: var(--gk-ink);
}
.gk-streak-cell.partial {
  background: var(--gk-ink-4);
}
.gk-streak-cell.today {
  background: var(--gk-accent);
}

@keyframes gk-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}