/* ===================== Vibe — All GitHub UI Blend (All-Device) =====================
   Sources:
   - eszeske08-maker/neon-dash (neon borders, Orbitron font, dark bg)
   - lovnishverma/slide-controller (cards, shadows, clean chips)
   - ilyassesalama/vibration (ink-on-neutral, rounded pills, preset strip)
   - lochie/web-haptics (minimal haptic patterns)
=============================== */
:root {
  --bg: #050510;
  --neon-blue: #00f3ff;
  --neon-pink: #ff00ff;
  --neon-green: #00ff9d;
  --neon-yellow: #ffee00;
  --ui-bg: rgba(0, 0, 0, 0.7);

  --ink: #19191c;
  --ink-2: #57575f;
  --ink-3: #696971;
  --line: #e3e3e7;
  --on-ink: #fafafa;
  --shadow: 0 1px 2px rgb(25 25 40 / 0.05), 0 10px 30px -12px rgb(25 25 40 / 0.14);

  --accent: var(--neon-blue);
  --accent-2: var(--neon-pink);
  --accent-3: var(--neon-green);
  --accent-glow: rgba(0, 243, 255, 0.35);
  --text: #f5f5f7;
  --muted: #a1a1aa;

  --r-card: 22px;
  --r-inner: 14px;
  --font: 'Orbitron', 'SF Pro Rounded', ui-rounded, system-ui, sans-serif;
  --font-code: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --gutter: 16px;
  --max-width: 520px;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #050510;
    --ink: #f2f2f4;
    --ink-2: #a5a5ad;
    --ink-3: #898991;
    --line: #2a2a31;
    --on-ink: #121215;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.4), 0 12px 30px -14px rgb(0 0 0 / 0.6);
    --accent-glow: rgba(0, 243, 255, 0.25);
  }
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100svh;
  overflow-x: hidden;
}

h1, h2, h3, p { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
button, a, [role="button"] {
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}
button svg, a svg { pointer-events: none; flex: none; }

:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

/* Screens */
.screen {
  width: 100%;
  max-width: var(--max-width);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin: 0 auto;
}
.hidden { display: none !important; }

.page {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Unsupported — black bg, white text */
.unsupported-screen {
  background: #000;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.unsupported-screen .page { text-align: center; }
.icon { font-size: 56px; margin-bottom: 16px; display: block; }
.section-title { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 700; letter-spacing: -0.03em; line-height: 1.12; margin-bottom: 10px; color: var(--text); }
.section-lede { margin-top: 0; max-width: 56ch; font-size: 1.02rem; color: var(--muted); }
.fine { font-size: 0.8rem; opacity: 0.7; margin-top: 10px; }

/* Supported screen */
.supported-screen {
  min-height: 100svh;
  background: var(--bg);
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

/* Nav */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px var(--gutter);
  position: sticky;
  top: env(safe-area-inset-top);
  z-index: 50;
  background: linear-gradient(to bottom, var(--bg) 60%, transparent);
  backdrop-filter: blur(8px);
}
.logo {
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 10px var(--accent-glow);
}
.chip {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--ui-bg);
  border: 1px solid var(--line);
  color: var(--muted);
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
.chip.small { font-size: 0.7rem; padding: 4px 10px; }
.chip.ok { color: var(--neon-green); border-color: rgba(0, 255, 157, 0.35); text-shadow: 0 0 8px rgba(0, 255, 157, 0.3); }
.chip.err { color: var(--neon-pink); border-color: rgba(255, 0, 255, 0.35); text-shadow: 0 0 8px rgba(255, 0, 255, 0.3); }

/* Sections */
.section { padding-block: 32px; width: 100%; }

/* Hero */
.hero {
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
}
.title { font-size: clamp(2rem, 6vw, 3.5rem); font-weight: 700; letter-spacing: -0.04em; line-height: 1; margin-bottom: 4px; text-shadow: 0 0 20px var(--accent-glow); }
.lede { max-width: 42ch; font-size: 1.05rem; color: var(--muted); }

/* Duration pad */
.pad {
  padding: 18px;
  border-radius: var(--r-card);
  background: var(--ui-bg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow), 0 0 0 1px var(--line);
  text-align: left;
}
.padHead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 10px;
}
.readout {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-variant-numeric: tabular-nums;
  margin-bottom: 14px;
}
.readout > :first-child {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text);
}
.of { font-size: 0.95rem; font-weight: 600; color: var(--muted); }

input[type=range] {
  width: 100%;
  height: 40px;
  -webkit-appearance: none;
  background: transparent;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 26px;
  height: 26px;
  background: var(--neon-blue);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 15px var(--accent-glow);
  transition: transform 0.1s;
  border: 2px solid #fff;
}
input[type=range]::-webkit-slider-thumb:active { transform: scale(1.15); }
input[type=range]::-webkit-slider-runnable-track {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 4px;
}
input[type=range]:focus { outline: none; }

/* Preset strip (swipeable) */
.strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(140px, 42%);
  gap: 10px;
  margin: 20px calc(var(--gutter) * -1) 0;
  padding: 0 var(--gutter) 6px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--gutter);
  overscroll-behavior-x: contain;
  scrollbar-width: none;
}
.strip::-webkit-scrollbar { display: none; }
.cell { scroll-snap-align: start; display: flex; }
@media (min-width: 560px) {
  .strip {
    grid-auto-columns: minmax(160px, 30%);
  }
}
@media (min-width: 900px) {
  .strip {
    grid-auto-flow: row;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    grid-auto-columns: auto;
    margin: 28px 0 0;
    padding: 0;
    overflow: visible;
  }
}

/* Preset chip */
.preset-chip {
  flex: 1 1 auto;
  min-width: 140px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--ui-bg);
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}
.preset-chip:hover {
  border-color: var(--neon-blue);
  color: var(--text);
  background: rgba(0, 243, 255, 0.15);
  box-shadow: 0 0 15px var(--accent-glow);
}
.preset-chip.active {
  background: var(--neon-blue);
  color: #000;
  border-color: var(--neon-blue);
  box-shadow: 0 0 25px var(--accent-glow);
}

/* Buttons */
.btn-row { display: flex; gap: 12px; margin-top: 8px; }
.btn {
  flex: 1;
  border: 2px solid var(--neon-blue);
  border-radius: 14px;
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s, filter 0.15s, opacity 0.15s, box-shadow 0.2s;
  color: var(--neon-blue);
  background: rgba(0, 243, 255, 0.05);
  text-shadow: 0 0 8px var(--accent-glow);
}
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--neon-blue);
  color: #000;
  box-shadow: 0 0 25px var(--accent-glow);
  border-color: var(--neon-blue);
}
.btn.primary:hover { filter: brightness(0.95); box-shadow: 0 0 35px var(--accent-glow); }
.btn.ghost {
  background: transparent;
  color: var(--neon-pink);
  border-color: var(--neon-pink);
  text-shadow: 0 0 8px rgba(255, 0, 255, 0.3);
}
.btn.ghost:hover { background: rgba(255, 0, 255, 0.1); box-shadow: 0 0 20px rgba(255, 0, 255, 0.3); }
.btn.primary:disabled, .btn.ghost:disabled { opacity: 0.5; cursor: not-allowed; }

/* Toggle */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--muted);
}
.toggle-track {
  position: relative;
  width: 44px;
  height: 24px;
  background: rgba(255,255,255,0.08);
  border-radius: 12px;
  transition: background 0.25s;
  border: 1px solid var(--line);
}
.toggle-track::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 20px; height: 20px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.25s;
  box-shadow: 0 0 8px rgba(0,0,0,0.3);
}
#live:checked + .toggle-track { background: var(--neon-green); border-color: var(--neon-green); box-shadow: 0 0 12px var(--accent-glow); }
#live:checked + .toggle-track::after { transform: translateX(20px); }

/* Visualizer panel */
.visualizer {
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--ui-bg);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
}
.viz-title { font-size: 0.8rem; font-weight: 700; color: var(--muted); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.viz-bar { width: 100%; height: 8px; background: rgba(255,255,255,0.06); border-radius: 4px; overflow: hidden; position: relative; margin-bottom: 8px; }
.viz-bar::after {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 0%;
  background: linear-gradient(90deg, var(--neon-blue), var(--neon-pink));
  border-radius: 4px;
  transition: width 0.2s ease;
  box-shadow: 0 0 15px var(--accent-glow);
}
.viz-bar.active::after { width: 100%; animation: pulse 1.2s infinite; }
.viz-note { font-size: 0.72rem; color: var(--ink-3); }

@keyframes pulse { 0%, 100% { opacity: 0.6; } 50% { opacity: 1; } }

/* Footer */
.app-footer { margin-top: auto; padding: 24px var(--gutter) 40px; font-size: 0.75rem; color: var(--ink-3); }

/* Responsive fine-tuning */
@media (max-width: 400px) {
  :root { --gutter: 14px; --max-width: 100%; }
  .page { padding: 0 var(--gutter); }
  .btn-row { flex-direction: column; }
  .title { font-size: 2rem; }
  .unsupported-screen .page { padding: 0 20px; }
}

@media (min-width: 900px) {
  .supported-screen { padding-top: 40px; padding-bottom: 60px; }
  .nav { padding: 16px var(--gutter); }
  .section { padding-block: 48px; }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
}