:root {
  color-scheme: dark;
  --font-body: "Segoe UI Variable", "Trebuchet MS", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Bahnschrift", "Arial Narrow", "Trebuchet MS", system-ui, sans-serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  --radius-sm: 0.625rem;
  --radius-md: 0.95rem;
  --radius-lg: 1.35rem;
  --radius-xl: 1.75rem;
  --radius-pill: 999px;

  --surface-0: oklch(13% 0.018 62);
  --surface-1: oklch(17% 0.022 62);
  --surface-2: oklch(21% 0.024 62);
  --surface-3: oklch(26% 0.026 62);
  --ink-1: oklch(94% 0.014 76);
  --ink-2: oklch(80% 0.026 76);
  --ink-3: oklch(66% 0.034 76);
  --line-subtle: oklch(34% 0.034 64);
  --line-strong: oklch(48% 0.055 66);
  --ember: oklch(74% 0.16 62);
  --ember-strong: oklch(80% 0.18 70);
  --ember-ink: oklch(18% 0.04 58);
  --steel: oklch(64% 0.09 220);
  --danger: oklch(71% 0.15 28);
  --ready: oklch(75% 0.14 145);
  --ready-surface: oklch(25% 0.07 145 / 38%);
  --focus-ring: oklch(80% 0.17 70 / 34%);

  --shadow-raised: 0 1.5rem 4rem oklch(4% 0.01 62 / 46%);
  --shadow-soft: 0 1rem 2.5rem oklch(4% 0.01 62 / 28%);
  --transition-fast: 160ms cubic-bezier(0.22, 1, 0.36, 1);

  font-family: var(--font-body);
  background: var(--surface-0);
  color: var(--ink-1);
}

* { box-sizing: border-box; }

html { min-width: 320px; }

body {
  margin: 0;
  min-height: 100vh;
  isolation: isolate;
  background:
    radial-gradient(circle at 12% 6%, oklch(63% 0.13 58 / 22%), transparent 22rem),
    radial-gradient(circle at 88% 18%, oklch(58% 0.08 220 / 18%), transparent 24rem),
    linear-gradient(135deg, var(--surface-1) 0%, var(--surface-0) 48%, oklch(10% 0.018 42) 100%);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(90deg, oklch(92% 0.02 76 / 4%) 1px, transparent 1px),
    linear-gradient(0deg, oklch(92% 0.02 76 / 4%) 1px, transparent 1px);
  background-size: 3rem 3rem;
  mask-image: linear-gradient(to bottom, oklch(0% 0 0 / 82%), transparent 78%);
}

button,
textarea { font: inherit; }

button { -webkit-tap-highlight-color: transparent; }

h1,
h2,
p { margin-top: 0; }

.app-shell {
  position: relative;
  z-index: 1;
  width: min(72rem, 100%);
  margin: 0 auto;
  padding: clamp(var(--space-5), 4vw, var(--space-10)) clamp(var(--space-4), 3vw, var(--space-8)) var(--space-10);
}

.hero {
  display: grid;
  gap: var(--space-4);
  max-width: 46rem;
  padding: var(--space-4) 0 var(--space-6);
}

.eyebrow {
  width: fit-content;
  margin: 0;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  color: var(--ember-strong);
  background: oklch(28% 0.07 62 / 44%);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1;
  text-transform: uppercase;
}

h1 {
  margin-bottom: 0;
  font-family: var(--font-display);
  font-size: clamp(2.7rem, 11vw, 5.8rem);
  font-stretch: condensed;
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 0.88;
}

h2 {
  margin-bottom: var(--space-1);
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  font-weight: 750;
  letter-spacing: -0.025em;
}

.intro {
  max-width: 42rem;
  margin-bottom: 0;
  color: var(--ink-2);
  font-size: clamp(1rem, 1.7vw, 1.1rem);
  line-height: 1.7;
}

.card {
  position: relative;
  margin-top: var(--space-5);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, oklch(23% 0.026 62 / 96%), oklch(17% 0.02 62 / 96%)),
    var(--surface-1);
  box-shadow: var(--shadow-raised);
  overflow: hidden;
}

.card::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background: linear-gradient(135deg, oklch(82% 0.16 70 / 11%), transparent 34%, oklch(60% 0.08 220 / 9%));
}

.controls,
.timers-card {
  padding: clamp(var(--space-5), 3vw, var(--space-8));
}

.section-heading {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.heading-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-2);
}

.timer-tools {
  display: grid;
  justify-items: end;
  gap: var(--space-2);
}

textarea {
  position: relative;
  z-index: 1;
  width: 100%;
  min-height: 15rem;
  resize: vertical;
  padding: var(--space-5);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-lg);
  outline: none;
  background: oklch(11% 0.018 62 / 82%);
  box-shadow: inset 0 0.0625rem 0 oklch(100% 0 0 / 5%);
  color: var(--ink-1);
  line-height: 1.6;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

textarea::placeholder { color: var(--ink-3); }

textarea:focus-visible {
  border-color: var(--ember-strong);
  background: oklch(12% 0.02 62 / 94%);
  box-shadow: 0 0 0 0.25rem var(--focus-ring), inset 0 0.0625rem 0 oklch(100% 0 0 / 6%);
}

.actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

button {
  min-height: 2.875rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  padding: 0 var(--space-5);
  cursor: pointer;
  color: var(--ember-ink);
  background: linear-gradient(180deg, var(--ember-strong), var(--ember));
  box-shadow: 0 0.75rem 1.75rem oklch(10% 0.06 58 / 32%);
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.015em;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

button:hover {
  transform: translateY(-0.0625rem);
  box-shadow: 0 1rem 2rem oklch(10% 0.06 58 / 42%);
}

button:active { transform: translateY(0); }

button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
}

button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 0.25rem var(--focus-ring), 0 1rem 2rem oklch(10% 0.06 58 / 38%);
}

.secondary-button,
.ghost-button {
  border-color: var(--line-subtle);
  color: var(--ink-1);
  background: oklch(25% 0.028 62 / 82%);
  box-shadow: none;
}

.secondary-button:hover,
.ghost-button:hover {
  border-color: var(--line-strong);
  background: oklch(30% 0.034 62 / 88%);
}

.ghost-button {
  min-height: 2.375rem;
  padding: 0 var(--space-4);
  font-size: 0.85rem;
}

.status {
  position: relative;
  z-index: 1;
  min-height: 1.5em;
  margin: var(--space-4) var(--space-1) 0;
  color: var(--ink-2);
  line-height: 1.5;
}

.status.error { color: var(--danger); }

.reminder-status {
  margin-top: calc(var(--space-4) * -1);
  margin-bottom: var(--space-4);
}

.muted {
  margin: 0;
  color: var(--ink-3);
  font-size: 0.95rem;
}

.clock {
  flex: 0 0 auto;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-pill);
  color: var(--ink-2);
  background: oklch(12% 0.016 62 / 62%);
  font-family: var(--font-display);
  font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.timer-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.timer-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-5);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, oklch(24% 0.03 62 / 92%), oklch(15% 0.018 62 / 94%)),
    var(--surface-2);
  box-shadow: var(--shadow-soft);
}

.timer-name {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 2.4vw, 1.35rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.event-badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.35rem;
  margin-left: var(--space-2);
  padding: 0 var(--space-2);
  border: 1px solid oklch(72% 0.14 145 / 45%);
  border-radius: var(--radius-pill);
  color: var(--ready);
  background: oklch(22% 0.06 145 / 42%);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  vertical-align: middle;
}

.timer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.timer-world,
.timer-location {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: 0 var(--space-3);
  border: 1px solid oklch(58% 0.12 70 / 46%);
  border-radius: var(--radius-pill);
  color: var(--ember-strong);
  background: oklch(24% 0.07 62 / 48%);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timer-location {
  border-color: oklch(58% 0.08 220 / 44%);
  color: oklch(76% 0.08 220);
  background: oklch(22% 0.05 220 / 42%);
}

.timer-date {
  margin: var(--space-3) 0 0;
  color: var(--ink-3);
  font-size: 0.9rem;
  line-height: 1.45;
}

.countdown {
  justify-self: end;
  min-width: 9ch;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--ink-1);
  background: oklch(10% 0.018 62 / 72%);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 5vw, 2.45rem);
  font-weight: 850;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.035em;
  line-height: 1;
  text-align: right;
}

.timer-item.ready {
  border-color: oklch(67% 0.13 145 / 62%);
  background:
    linear-gradient(135deg, var(--ready-surface), oklch(15% 0.018 62 / 96%)),
    var(--surface-2);
}

.timer-item.ready .countdown {
  color: var(--ready);
  background: oklch(16% 0.054 145 / 78%);
}

.empty-state {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  gap: var(--space-2);
  min-height: 12rem;
  padding: var(--space-8) var(--space-4);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-lg);
  color: var(--ink-3);
  background: oklch(12% 0.018 62 / 54%);
  text-align: center;
}

.empty-state::before {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  content: "00";
  color: var(--ember-strong);
  background: oklch(24% 0.07 62 / 44%);
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.06em;
}

.empty-state strong {
  color: var(--ink-1);
  font-family: var(--font-display);
  font-size: 1.18rem;
  letter-spacing: -0.02em;
}

.empty-state span {
  max-width: 22rem;
  line-height: 1.55;
}

.empty-state[hidden] { display: none; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 760px) {
  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .clock { width: fit-content; }

  .timer-tools { justify-items: start; }

  .timer-tools .heading-actions { justify-content: flex-start; }
}

@media (max-width: 640px) {
  .app-shell { padding-inline: var(--space-3); }

  .controls,
  .timers-card { padding: var(--space-4); }

  textarea { min-height: 13rem; }

  .actions > button { flex: 1 1 10rem; }

  .timer-item {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .countdown {
    justify-self: stretch;
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    transition-duration: 1ms;
  }
}