/* ═══════════════════════════════════════════════════════════════
   ÓMBRE · Stay in the shadow.
   Pale stone, ink shadow palette · Mobile-first · Quiet by design
   ═══════════════════════════════════════════════════════════════ */

/* ──────────────────────────────────────────────────────────────
   DESIGN TOKENS
   Color is state, not decoration. The vermillion accent appears
   only when a session is active — that's the only animation
   the eye does during deep work.
   ────────────────────────────────────────────────────────────── */
:root {
  /* Surface */
  --c-stone:      #F2EFE8;  /* primary background — warm off-white */
  --c-stone-2:    #EBE7DD;  /* slight elevation */
  --c-stone-3:    #E5E0D2;  /* deeper surface */

  /* Text + structure */
  --c-ink:        #1F1D18;  /* primary ink — body, timer, mark */
  --c-smoke:      #5C5852;  /* secondary text */
  --c-sand:       #B8AE99;  /* tertiary text, subtle borders */
  --c-sand-soft:  rgba(31, 29, 24, 0.10);
  --c-sand-line:  rgba(31, 29, 24, 0.18);

  /* Accent — used ONLY for active-session state.
     Vermillion is a deep warm red. Not orange, not crimson — vermillion.
     It signals work happening; nothing else. */
  --c-vermillion: #8C2818;
  --c-vermillion-soft: rgba(140, 40, 24, 0.10);

  /* Type — three voices for three jobs */
  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Type scale — restrained. Most of the screen is one of two sizes. */
  --fs-xs:  0.7rem;     /* 11.2px */
  --fs-sm:  0.85rem;    /* 13.6px */
  --fs-md:  1rem;       /* 16px */
  --fs-lg:  1.18rem;    /* 18.9px */
  --fs-xl:  1.5rem;     /* 24px */
  --fs-2xl: 1.85rem;    /* 29.6px */
  --fs-timer: clamp(4.5rem, 18vw, 8rem); /* fluid timer numerals */

  /* Spacing */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;

  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 10px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-quiet: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ──────────────────────────────────────────────────────────────
   RESET
   ────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
button { background: none; border: none; font: inherit; color: inherit; cursor: pointer; }
input { font: inherit; color: inherit; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-md);
  line-height: 1.55;
  color: var(--c-ink);
  background: var(--c-stone);
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* Allow color transitions when entering/leaving active state */
  transition: background-color 0.5s var(--ease-quiet);
}

/* When the timer is active, the background shifts almost imperceptibly
   warmer. Subliminal cue that work is happening. */
body.is-live {
  background-color: var(--c-stone);
}

/* ──────────────────────────────────────────────────────────────
   STAGE LAYOUT — single column, generous whitespace
   ────────────────────────────────────────────────────────────── */
.stage {
  max-width: 600px;
  margin: 0 auto;
  min-height: 100dvh;
  padding: var(--sp-5) var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

@media (min-width: 600px) {
  .stage { padding: var(--sp-6) var(--sp-5); gap: var(--sp-7); }
}

/* ──────────────────────────────────────────────────────────────
   TOPBAR — wordmark + meta
   ────────────────────────────────────────────────────────────── */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--sp-3);
}

/* The wordmark IS the brand. Italic serif, lowercase except Ó. */
.wordmark {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: var(--fs-2xl);
  letter-spacing: -0.015em;
  color: var(--c-ink);
  line-height: 1;
}

.meta {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: var(--fs-xs);
  color: var(--c-sand);
  letter-spacing: 0.06em;
}

/* ──────────────────────────────────────────────────────────────
   TIMER COLUMN
   ────────────────────────────────────────────────────────────── */
.timer-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--sp-5);
  padding: var(--sp-5) 0;
}

/* ── Presets — shown only in idle state ── */
.presets {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
  justify-content: center;
  transition: opacity 0.3s var(--ease-out), height 0.3s var(--ease-out);
}

.presets[hidden] { display: none; }

.preset {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 14px;
  border: 0.5px solid var(--c-sand-line);
  border-radius: var(--r-sm);
  color: var(--c-smoke);
  background: transparent;
  transition: all 0.2s var(--ease-out);
  cursor: pointer;
}

.preset:hover {
  border-color: var(--c-ink);
  color: var(--c-ink);
}

.preset.is-active {
  background: var(--c-ink);
  color: var(--c-stone);
  border-color: var(--c-ink);
}

/* When session is live, the active preset goes vermillion */
body.is-live .preset.is-active {
  background: var(--c-vermillion);
  border-color: var(--c-vermillion);
}

/* ── Time display — the centerpiece ── */
.time {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: var(--fs-timer);
  letter-spacing: -0.025em;
  line-height: 1;
  color: var(--c-ink);
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
  transition: color 0.4s var(--ease-quiet), opacity 0.4s var(--ease-quiet);
  /* Subtle padding-top so descenders don't clip on tall renderings */
  padding-top: 0.05em;
}

body.is-live .time { color: var(--c-vermillion); }
body.is-done .time { color: var(--c-ink); opacity: 0.4; }

/* ── Status line — italic serif, soft ── */
.status {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: var(--fs-lg);
  color: var(--c-smoke);
  transition: color 0.4s var(--ease-quiet);
  min-height: 1.5em;
  /* Allow JS to set custom text without layout shift on long phrases */
  max-width: 28ch;
}

body.is-live .status { color: var(--c-vermillion); }

/* ── Controls ── */
.controls {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 12px 28px;
  border-radius: var(--r-md);
  border: 0.5px solid var(--c-ink);
  cursor: pointer;
  transition: all 0.18s var(--ease-out);
  white-space: nowrap;
  min-width: 120px;
}

.btn:active { transform: translateY(1px); }

.btn-solid {
  background: var(--c-ink);
  color: var(--c-stone);
}

.btn-solid:hover {
  background: var(--c-vermillion);
  border-color: var(--c-vermillion);
}

.btn-ghost {
  background: transparent;
  color: var(--c-ink);
}

.btn-ghost:hover {
  background: var(--c-stone-2);
  border-color: var(--c-ink);
}

.btn[hidden] { display: none; }

/* ──────────────────────────────────────────────────────────────
   NOISE TOGGLE — quiet, undecorated
   ────────────────────────────────────────────────────────────── */
.noise {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  padding-top: var(--sp-5);
  border-top: 0.5px solid var(--c-sand-soft);
}

.noise-row {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
}

.noise-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-smoke);
  letter-spacing: 0.02em;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.2s var(--ease-out);
}

.noise-toggle:hover { color: var(--c-ink); }

.noise-toggle[aria-pressed="true"] {
  color: var(--c-vermillion);
}

.noise-pip {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-sand);
  transition: background 0.3s var(--ease-out), box-shadow 0.4s var(--ease-out);
  flex-shrink: 0;
}

.noise-toggle[aria-pressed="true"] .noise-pip {
  background: var(--c-vermillion);
  box-shadow: 0 0 0 4px var(--c-vermillion-soft);
}

.noise-label { user-select: none; }

.noise-help {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 0.5px solid var(--c-sand-line);
  background: transparent;
  color: var(--c-sand);
  font-size: 11px;
  font-family: var(--font-body);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: help;
  transition: all 0.2s var(--ease-out);
  padding: 0;
  flex-shrink: 0;
}

.noise-help:hover {
  border-color: var(--c-ink);
  color: var(--c-ink);
}

/* Three-color picker — same visual pattern as the duration presets */
.noise-colors {
  display: flex;
  gap: var(--sp-1);
  flex-wrap: wrap;
  justify-content: center;
}

.ncolor {
  font-family: var(--font-body);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 11px;
  border: 0.5px solid var(--c-sand-line);
  border-radius: var(--r-sm);
  color: var(--c-smoke);
  background: transparent;
  transition: all 0.2s var(--ease-out);
  cursor: pointer;
}

.ncolor:hover {
  border-color: var(--c-ink);
  color: var(--c-ink);
}

.ncolor.is-active {
  background: var(--c-ink);
  color: var(--c-stone);
  border-color: var(--c-ink);
}

/* When session is live AND noise is on, the active color goes vermillion */
body.is-live .noise-toggle[aria-pressed="true"] ~ .noise-colors .ncolor.is-active,
.noise-toggle[aria-pressed="true"] ~ .noise-colors .ncolor.is-active {
  background: var(--c-vermillion);
  border-color: var(--c-vermillion);
}

/* The waveform line — flat when inactive, breathes when active */
.noise-wave {
  width: 120px;
  height: 14px;
  color: var(--c-sand);
  transition: color 0.3s var(--ease-out);
  flex-shrink: 0;
  display: none;
}

@media (min-width: 480px) {
  .noise-wave { display: block; }
}

.noise-wave svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.noise-toggle[aria-pressed="true"] ~ .noise-wave,
.noise[aria-label] .noise-toggle[aria-pressed="true"] ~ * .noise-wave {
  color: var(--c-vermillion);
}

/* When noise is on, color the wave vermillion via parent state */
.noise:has(.noise-toggle[aria-pressed="true"]) .noise-wave {
  color: var(--c-vermillion);
}

/* ──────────────────────────────────────────────────────────────
   VOLUME SLIDER — only visible while noise is on
   ────────────────────────────────────────────────────────────── */
.volume {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  max-width: 320px;
  margin: 0 auto;
  width: 100%;
  animation: fadeInUp 0.3s var(--ease-out);
}

.volume[hidden] { display: none; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.volume-label {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-sand);
  flex-shrink: 0;
}

/* Custom slider — minimal, ink-on-stone */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 2px;
  background: var(--c-sand-line);
  border-radius: 1px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-ink);
  cursor: grab;
  transition: transform 0.15s var(--ease-out), background 0.2s var(--ease-out);
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-ink);
  border: none;
  cursor: grab;
  transition: transform 0.15s var(--ease-out);
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="range"]::-webkit-slider-thumb:active { cursor: grabbing; }

body.is-live input[type="range"]::-webkit-slider-thumb { background: var(--c-vermillion); }
body.is-live input[type="range"]::-moz-range-thumb     { background: var(--c-vermillion); }

/* ──────────────────────────────────────────────────────────────
   MODAL
   ────────────────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(31, 29, 24, 0.5);
  display: grid;
  place-items: center;
  z-index: 100;
  padding: var(--sp-3);
  animation: fade 0.2s var(--ease-out);
}

@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

/* Critical override — without this, hidden attribute is overridden by display:grid */
.modal-backdrop[hidden] { display: none !important; }

.modal {
  background: var(--c-stone);
  border: 0.5px solid var(--c-sand-line);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  width: 100%;
  max-width: 440px;
  animation: slideUp 0.3s var(--ease-out);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--sp-3);
}

.modal-head h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: var(--fs-xl);
  color: var(--c-ink);
}

.icon-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  font-size: 22px;
  color: var(--c-smoke);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  cursor: pointer;
  transition: background 0.18s var(--ease-out);
  padding: 0;
}

.icon-btn:hover { background: var(--c-stone-2); color: var(--c-ink); }

.modal-body {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  line-height: 1.65;
  color: var(--c-smoke);
  margin-bottom: var(--sp-3);
}

.modal-fine {
  font-size: var(--fs-xs);
  color: var(--c-sand);
}

/* Definitions list inside help modal — three noise types explained */
.noise-defs {
  margin: var(--sp-3) 0;
  padding: var(--sp-3);
  background: var(--c-stone-2);
  border-radius: var(--r-md);
}

.noise-defs dt {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--fs-md);
  color: var(--c-ink);
  margin-top: var(--sp-2);
}

.noise-defs dt:first-child { margin-top: 0; }

.noise-defs dd {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  line-height: 1.55;
  color: var(--c-smoke);
  margin: 2px 0 var(--sp-1) 0;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--sp-4);
}

/* ──────────────────────────────────────────────────────────────
   TOAST
   ────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: calc(var(--sp-5) + env(safe-area-inset-bottom, 0));
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--c-ink);
  color: var(--c-stone);
  padding: 10px 18px;
  border-radius: var(--r-md);
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--fs-sm);
  z-index: 200;
  opacity: 0;
  transition:
    opacity 0.3s var(--ease-out),
    transform 0.3s var(--ease-out);
  max-width: calc(100vw - 32px);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast[hidden] { display: none !important; }

/* ──────────────────────────────────────────────────────────────
   ACCESSIBILITY
   ────────────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

@supports (padding: max(0px)) {
  body {
    padding-top: env(safe-area-inset-top);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }
}

/* Focus-visible — only show outline for keyboard users */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--c-vermillion);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}