:root {
  color-scheme: light;
  --bg: oklch(0.97 0.006 160);
  --panel: oklch(0.995 0.004 160);
  --ink: oklch(0.18 0.025 165);
  --muted: oklch(0.47 0.028 165);
  --line: oklch(0.86 0.014 160);
  --green: oklch(0.43 0.085 154);
  --green-soft: oklch(0.9 0.045 154);
  --rust: oklch(0.52 0.12 39);
  --amber: oklch(0.77 0.14 83);
  --danger: oklch(0.5 0.15 24);
  --shadow: 0 24px 70px oklch(0.2 0.03 165 / 0.12);
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 0.75rem;
  --space-lg: 1rem;
  --space-xl: 1.5rem;
  --space-2xl: 2rem;
  --radius: 8px;
  --progress: 0deg;
  --phase-color: var(--green);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, oklch(0.98 0.008 155), oklch(0.94 0.012 205) 62%, oklch(0.95 0.018 65));
  color: var(--ink);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
input {
  font: inherit;
  letter-spacing: 0;
}

button {
  min-height: 2.75rem;
  border: 0;
  border-radius: var(--radius);
  padding: 0 var(--space-lg);
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, color 160ms ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

button:active:not(:disabled) {
  transform: translateY(0);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.primary {
  background: var(--green);
  color: oklch(0.99 0.004 160);
}

.secondary {
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid color-mix(in oklch, var(--green) 18%, transparent);
}

.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}

.compact {
  min-height: 2.25rem;
  padding: 0 var(--space-md);
}

.shell {
  width: min(70rem, calc(100% - 2rem));
  min-height: 100vh;
  margin: 0 auto;
  padding: var(--space-xl) 0;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: var(--space-xl);
}

.topbar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.brand-mark {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--amber);
  font-weight: 800;
}

.brand-copy {
  min-width: 0;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: 1.2rem;
  line-height: 1.1;
}

h2 {
  font-size: 1.35rem;
  line-height: 1.15;
}

h3 {
  font-size: 0.95rem;
  line-height: 1.2;
}

.brand-copy p,
.message,
.timer-core small {
  color: var(--muted);
}

.mac-link {
  margin-left: auto;
  min-height: 2.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 var(--space-md);
  color: var(--ink);
  text-decoration: none;
  background: oklch(0.99 0.004 160 / 0.68);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(18rem, 0.78fr) minmax(20rem, 1.22fr);
  gap: var(--space-xl);
  align-items: stretch;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.room-panel,
.timer-panel {
  padding: var(--space-xl);
}

.section-heading,
.room-form,
.people {
  display: grid;
  gap: var(--space-md);
}

.section-heading {
  margin-bottom: var(--space-xl);
}

.eyebrow {
  color: var(--rust);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.field {
  display: grid;
  gap: var(--space-sm);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
}

input {
  width: 100%;
  min-height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 var(--space-md);
  background: oklch(0.985 0.004 160);
  color: var(--ink);
}

input:focus {
  outline: 3px solid color-mix(in oklch, var(--amber) 42%, transparent);
  border-color: var(--green);
}

.button-row,
.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.active-room {
  margin-top: var(--space-xl);
  padding: var(--space-md);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--space-sm);
  align-items: center;
}

.active-room[hidden] {
  display: none;
}

.active-room strong {
  display: block;
  margin-top: var(--space-xs);
  font-size: 1.4rem;
  overflow-wrap: anywhere;
}

.message {
  min-height: 1.4rem;
  margin-top: var(--space-md);
  font-size: 0.92rem;
}

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

.people {
  margin-top: var(--space-xl);
}

.people-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.people-head span {
  min-width: 2rem;
  min-height: 2rem;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green);
  font-weight: 800;
}

.people-list {
  min-height: 3rem;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: 0;
  margin: 0;
  list-style: none;
}

.person-chip {
  max-width: 100%;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: var(--space-sm) var(--space-md);
  background: oklch(0.99 0.004 160);
  color: var(--ink);
}

.person-dot {
  width: 0.7rem;
  height: 0.7rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--green);
}

.timer-panel {
  display: grid;
  gap: var(--space-xl);
}

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

.revision-badge {
  min-height: 2rem;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  padding: 0 var(--space-md);
  background: oklch(0.94 0.012 205);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 750;
  white-space: nowrap;
}

#timerTitle {
  font-size: 4rem;
  line-height: 0.95;
  margin-top: var(--space-xs);
}

.timer-ring {
  width: min(100%, 23rem);
  aspect-ratio: 1;
  margin: 0 auto;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background:
    conic-gradient(var(--phase-color) var(--progress), oklch(0.9 0.014 160) 0),
    oklch(0.94 0.014 160);
}

.timer-core {
  width: 78%;
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-items: center;
  align-content: center;
  gap: var(--space-sm);
  background: var(--panel);
  border: 1px solid var(--line);
}

.timer-core span {
  font-size: 3.3rem;
  line-height: 0.95;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.exercise-block {
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-lg);
  border-radius: var(--radius);
  background: oklch(0.96 0.018 78);
  border: 1px solid color-mix(in oklch, var(--amber) 42%, var(--line));
}

.exercise-block strong {
  font-size: 1.3rem;
}

.controls {
  grid-template-columns: 1.2fr 1fr 1fr;
}

@media (max-width: 780px) {
  .shell {
    width: min(100% - 1rem, 42rem);
    padding: var(--space-md) 0;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .room-panel,
  .timer-panel {
    padding: var(--space-lg);
  }

  .topbar {
    align-items: start;
  }

  .active-room {
    grid-template-columns: 1fr;
  }

  #timerTitle {
    font-size: 3rem;
  }

  .timer-core span {
    font-size: 2.4rem;
  }

  .controls {
    grid-template-columns: 1fr;
  }
}

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