:root {
  color-scheme: dark;
  --bg: #141311;
  --panel: #1d1c18;
  --panel-2: #24221c;
  --line: rgba(240, 230, 210, 0.16);
  --text: #f3ecdd;
  --muted: #b8b0a0;
  --amber: #f0a832;
  --amber-soft: rgba(240, 168, 50, 0.14);
  --cyan: #79d4d8;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(240, 168, 50, 0.12), transparent 60%),
    radial-gradient(700px 500px at -10% 110%, rgba(121, 212, 216, 0.08), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Avenir Next", Avenir, "Segoe UI", system-ui, sans-serif;
  line-height: 1.5;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--amber);
  color: #191104;
  padding: 10px 16px;
  font-weight: 700;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
  z-index: 10;
}

.app-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  max-width: 640px;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--cyan);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow--amber {
  color: var(--amber);
}

h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 500;
  line-height: 1.05;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2.6rem, 6vw, 4rem);
}

h2 {
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 1fr);
  gap: 16px;
  align-items: start;
}

.timer-card,
.stats-card,
.squat-panel,
.guide-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.timer-card {
  padding: 28px;
}

.ring-wrap {
  position: relative;
  width: min(340px, 80vw);
  margin: 0 auto 8px;
}

.ring {
  width: 100%;
  height: auto;
  display: block;
  transform: rotate(-90deg);
}

.ring circle {
  fill: none;
  stroke-width: 10;
}

.ring__track {
  stroke: rgba(240, 230, 210, 0.1);
}

.ring__progress {
  stroke: var(--amber);
  stroke-linecap: round;
  stroke-dasharray: 628.3;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 300ms linear;
}

.ring-center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 2px;
  padding: 24px;
}

.ring-state {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.ring-time {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 9vw, 4.4rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.ring-next {
  margin: 0;
  color: var(--muted);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 18px 0 24px;
}

.button {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 12px 22px;
}

.button:hover {
  border-color: rgba(240, 230, 210, 0.4);
}

.button:disabled {
  opacity: 0.45;
  cursor: default;
}

.button--primary {
  background: var(--amber);
  border-color: var(--amber);
  color: #1d1200;
}

.button--primary:hover {
  background: #ffb63e;
}

.button--count {
  width: 100%;
  padding: 20px;
  font-size: 1.15rem;
  background: var(--amber-soft);
  border-color: var(--amber);
  color: var(--amber);
}

.button--count:active {
  transform: scale(0.98);
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.field {
  display: grid;
  gap: 6px;
}

.field > span,
.switch-row strong {
  font-size: 0.92rem;
}

.field select {
  width: 100%;
  padding: 11px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
}

.field small,
.switch-row small {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.field--wide {
  grid-column: 1 / -1;
}

.field--wide .button {
  justify-self: start;
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
}

.switch-row input {
  width: 22px;
  height: 22px;
  accent-color: var(--amber);
  flex: none;
}

.side {
  display: grid;
  gap: 16px;
}

.squat-panel {
  padding: 24px;
  border-color: var(--amber);
  background: linear-gradient(180deg, var(--amber-soft), var(--panel) 55%);
}

.squat-count {
  margin: 6px 0 4px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.squat-count strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 4rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.squat-count span {
  color: var(--muted);
  font-size: 1.4rem;
}

.rep-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 10px 0 18px;
}

.rep-dots i {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 1px solid var(--amber);
}

.rep-dots i.is-done {
  background: var(--amber);
}

.squat-note {
  color: var(--muted);
  margin: 14px 0 18px;
}

.squat-actions {
  display: grid;
  gap: 10px;
}

.stats-card {
  padding: 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  display: grid;
  gap: 2px;
}

.stat span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.stat strong {
  font-size: 1.25rem;
}

.stat small {
  color: var(--muted);
}

.last-done {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.guide-card {
  margin: 0;
  overflow: hidden;
}

.guide-card img {
  width: 100%;
  height: 190px;
  display: block;
  object-fit: cover;
  object-position: 50% 25%;
}

.guide-card figcaption {
  padding: 16px 18px 18px;
}

.guide-card figcaption span {
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.guide-card blockquote {
  margin: 6px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
  line-height: 1.35;
}

.safety {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  max-width: 720px;
}

@media (max-width: 820px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .timer-card {
    padding: 20px;
  }
}

@media (max-width: 520px) {
  .settings-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .controls .button {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ring__progress {
    transition: none;
  }
}