:root {
  color-scheme: light dark;
  --bg: #eef3f1;
  --surface: #ffffff;
  --surface-2: #f6f8f7;
  --text: #17211f;
  --muted: #5e6b68;
  --line: #dce5e1;
  --accent: #167c80;
  --accent-2: #d88a3d;
  --accent-3: #5d6fb8;
  --danger: #a83f3f;
  --shadow: 0 18px 50px rgba(22, 33, 31, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  min-height: 44px;
  border-radius: 8px;
  padding: 0 16px;
  cursor: pointer;
}

button:hover,
select:hover,
input:hover {
  border-color: color-mix(in srgb, var(--accent), var(--line) 45%);
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent), transparent 68%);
  outline-offset: 2px;
}

.breath-app {
  width: min(1120px, calc(100% - 28px));
  min-height: calc(100dvh - 28px);
  margin: 14px auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 16px;
}

.practice,
.settings {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.practice {
  min-height: 680px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
}

.settings {
  padding: 20px;
  align-self: stretch;
  overflow: auto;
}

.topbar {
  min-height: 86px;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 1.9rem;
  letter-spacing: 0;
}

.icon-button {
  width: 44px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  font-size: 1.25rem;
}

.icon-button[aria-pressed="false"] {
  color: var(--muted);
  background: var(--surface-2);
}

.sound-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sound-controls select {
  width: 158px;
  min-height: 38px;
  padding: 0 8px;
  font-size: 0.88rem;
  border-radius: 999px;
  transition: opacity 160ms ease, transform 160ms ease;
}

.sound-controls.is-muted select {
  opacity: 0;
  pointer-events: none;
  transform: translateX(4px);
}

.stage {
  min-height: 0;
  display: grid;
  grid-template-rows: 1fr auto auto;
  place-items: center;
  padding: 28px 20px 18px;
  text-align: center;
}

.orb-wrap {
  width: min(62vw, 390px);
  aspect-ratio: 1;
  position: relative;
  display: grid;
  place-items: center;
}

.orb-rings {
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 38% 32%, rgba(255, 255, 255, 0.65), transparent 24%),
    radial-gradient(circle, color-mix(in srgb, var(--accent), white 18%), color-mix(in srgb, var(--accent-3), black 10%));
  opacity: 0.9;
  transform: scale(var(--orb-scale, 0.54));
  transition: background-color 300ms ease;
  box-shadow:
    0 0 0 calc(20px * var(--orb-scale, 0.54)) color-mix(in srgb, var(--accent), transparent 82%),
    0 0 0 calc(42px * var(--orb-scale, 0.54)) color-mix(in srgb, var(--accent-2), transparent 86%),
    0 24px 60px color-mix(in srgb, var(--accent), transparent 72%);
}

.orb-rings.is-preparing {
  animation: preparePulse 2.8s ease-in-out infinite;
}

.orb-rings.is-preparing-exit {
  animation: prepareFadeOut 4s ease-in-out forwards;
}

.orb-rings.is-transitioning {
  transition:
    transform 700ms ease,
    opacity 450ms ease,
    box-shadow 700ms ease,
    background-color 300ms ease;
}

@keyframes preparePulse {
  0%,
  100% {
    transform: scale(var(--orb-scale, 0.62));
    opacity: 0.82;
    box-shadow:
      0 0 0 calc(16px * var(--orb-scale, 0.62)) color-mix(in srgb, var(--accent), transparent 86%),
      0 0 0 calc(34px * var(--orb-scale, 0.62)) color-mix(in srgb, var(--accent-2), transparent 91%),
      0 18px 44px color-mix(in srgb, var(--accent), transparent 80%);
  }

  45% {
    transform: scale(calc(var(--orb-scale, 0.62) + 0.025));
    opacity: 0.92;
    box-shadow:
      0 0 0 calc(20px * var(--orb-scale, 0.62)) color-mix(in srgb, var(--accent), transparent 82%),
      0 0 0 calc(42px * var(--orb-scale, 0.62)) color-mix(in srgb, var(--accent-2), transparent 88%),
      0 24px 56px color-mix(in srgb, var(--accent), transparent 74%);
  }
}

@keyframes prepareFadeOut {
  0% {
    transform: scale(var(--orb-scale, 0.62));
    opacity: 0.86;
    box-shadow:
      0 0 0 calc(18px * var(--orb-scale, 0.62)) color-mix(in srgb, var(--accent), transparent 84%),
      0 0 0 calc(38px * var(--orb-scale, 0.62)) color-mix(in srgb, var(--accent-2), transparent 89%),
      0 20px 48px color-mix(in srgb, var(--accent), transparent 78%);
  }

  55% {
    transform: scale(0.58);
    opacity: 0.58;
    box-shadow:
      0 0 0 14px color-mix(in srgb, var(--accent), transparent 90%),
      0 0 0 28px color-mix(in srgb, var(--accent-2), transparent 94%),
      0 14px 34px color-mix(in srgb, var(--accent), transparent 86%);
  }

  100% {
    transform: scale(0.5);
    opacity: 0.24;
    box-shadow:
      0 0 0 8px color-mix(in srgb, var(--accent), transparent 96%),
      0 0 0 18px color-mix(in srgb, var(--accent-2), transparent 98%),
      0 8px 22px color-mix(in srgb, var(--accent), transparent 92%);
  }
}

.orb {
  position: relative;
  width: 42%;
  aspect-ratio: 1;
  border-radius: 50%;
  padding: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 6px;
  border: 0;
  color: white;
  background: color-mix(in srgb, var(--accent), black 18%);
}

.orb-label {
  font-size: 1rem;
  font-weight: 700;
}

.orb-count {
  font-size: 2.2rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.instruction {
  width: min(620px, 100%);
  min-height: 54px;
  margin: 18px 0 12px;
  color: var(--muted);
  font-size: 1.1rem;
}

.session-meta {
  width: min(540px, 100%);
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.session-meta span {
  min-width: 92px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-2);
}

.session-progress {
  width: min(540px, 100%);
  min-height: 30px;
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
}

.session-progress-track {
  height: 8px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  overflow: hidden;
}

.session-progress-bar {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 120ms linear;
}

.test-result {
  width: min(540px, 100%);
  margin-top: 18px;
  padding: 18px;
  display: grid;
  gap: 14px;
  text-align: left;
  border: 1px solid color-mix(in srgb, var(--accent), transparent 62%);
  border-radius: 8px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent), transparent 88%), transparent 58%),
    var(--surface-2);
}

.test-result-kicker {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.test-result h2 {
  margin: 0;
  font-size: 1.15rem;
}

.test-result-score {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

#test-result-time {
  font-size: 2.3rem;
  line-height: 1;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

#test-result-range {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: color-mix(in srgb, var(--surface), transparent 18%);
  font-size: 0.84rem;
  font-weight: 700;
}

.test-result p {
  margin: 0;
}

#test-result-text {
  color: var(--text);
  line-height: 1.55;
}

#test-result-next {
  color: var(--muted);
  line-height: 1.5;
}

.controls {
  padding: 16px 20px 20px;
  display: flex;
  justify-content: center;
  gap: 10px;
  border-top: 1px solid var(--line);
}

.field {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
}

label {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

select,
input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--text);
  background: var(--surface);
}

.summary {
  min-height: 58px;
  margin: 4px 0 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--muted);
  line-height: 1.45;
}

.preset-meta {
  min-height: 38px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 18px;
}

.preset-meta span {
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 12px;
}

.settings-grid .toggle,
.settings-grid .field:has(#pace) {
  grid-column: span 2;
}

.toggle {
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  margin-bottom: 10px;
}

.toggle input {
  width: 20px;
  min-height: 20px;
}

.notice {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.is-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: 840px) {
  .breath-app {
    width: 100%;
    min-height: 100dvh;
    margin: 0;
    grid-template-columns: 1fr;
    gap: 0;
  }

  .practice,
  .settings {
    border-left: 0;
    border-right: 0;
    box-shadow: none;
  }

  .practice {
    min-height: 620px;
  }

  .sound-controls select {
    width: 144px;
  }

  .settings {
    max-height: none;
  }

  .orb-wrap {
    width: min(78vw, 340px);
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101716;
    --surface: #17211f;
    --surface-2: #202b28;
    --text: #eef5f2;
    --muted: #a5b5b0;
    --line: #31413d;
    --accent: #31a5a1;
    --accent-2: #e09a51;
    --accent-3: #8290d8;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
  }
}