:root {
  color-scheme: light;
  --bg: #f4f1e8;
  --panel: rgba(255, 253, 247, 0.84);
  --ink: #26332f;
  --muted: #65736d;
  --line: rgba(38, 51, 47, 0.14);
  --accent: #51766e;
  --accent-2: #b27d58;
  --soft: #dfe8df;
  --shadow: 0 20px 70px rgba(38, 51, 47, 0.12);
  --settings-width: clamp(18rem, 30vw, 24rem);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 12%, rgba(178, 125, 88, 0.18), transparent 30rem),
    radial-gradient(circle at 85% 8%, rgba(81, 118, 110, 0.16), transparent 26rem),
    linear-gradient(135deg, #f7f3e9 0%, #edf2eb 52%, #f6eee3 100%);
  color: var(--ink);
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
}

.app {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
  min-height: 100svh;
  padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  transition: gap 0.72s cubic-bezier(0.22, 1, 0.36, 1);
}

.practice,
.settings {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.practice {
  position: relative;
  flex: 1 1 auto;
  display: grid;
  align-content: center;
  gap: clamp(1.2rem, 4vw, 2.8rem);
  overflow: hidden;
  min-height: calc(100svh - 2rem);
  padding: clamp(1.3rem, 6vw, 4.8rem);
  border-radius: 8px;
  transition: min-height 0.45s ease, padding 0.45s ease;
}

.settings-shell {
  position: relative;
  flex: 0 0 auto;
  width: var(--settings-width);
  min-width: 0;
  min-height: 12.25rem;
  overflow: hidden;
  opacity: 1;
  transition:
    width 0.72s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.72s cubic-bezier(0.22, 1, 0.36, 1);
}

.settings {
  position: absolute;
  top: 0;
  right: 0;
  align-self: start;
  display: grid;
  gap: 1.25rem;
  width: var(--settings-width);
  min-width: var(--settings-width);
  padding: 1.1rem;
  border-radius: 8px;
  max-height: 28rem;
  overflow: hidden;
  transform: translateX(0);
  opacity: 1;
  transition: opacity 0.5s ease, transform 0.56s ease;
}

.sky {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.sky span {
  position: absolute;
  display: block;
  width: 44vmin;
  aspect-ratio: 1;
  border-radius: 999px;
  border: 1px solid rgba(81, 118, 110, 0.16);
  opacity: 0.5;
  animation: breathe 12s ease-in-out infinite;
}

.sky span:nth-child(1) {
  left: -12vmin;
  top: 12%;
}

.sky span:nth-child(2) {
  right: -10vmin;
  bottom: 8%;
  animation-delay: -3s;
}

.sky span:nth-child(3) {
  left: 42%;
  top: -24vmin;
  animation-delay: -6s;
}

@keyframes breathe {
  0%,
  100% {
    transform: scale(0.92);
  }
  50% {
    transform: scale(1.08);
  }
}

.session-state,
.progress-wrap,
.controls {
  position: relative;
  z-index: 1;
}

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

h2,
p {
  margin-top: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 1.15rem;
}

.timer-ring {
  position: relative;
  display: grid;
  place-items: center;
  justify-self: center;
  margin-inline: auto;
  width: min(64vw, 27rem);
  aspect-ratio: 1;
}

.ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  transform: rotate(-90deg);
}

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

.ring-track {
  stroke: rgba(38, 51, 47, 0.1);
}

.ring-progress {
  --ring-length: 678.584;
  --ring-progress: 0;
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: var(--ring-length);
  stroke-dashoffset: calc(var(--ring-length) * (1 - var(--ring-progress)));
  opacity: 1;
  transition: stroke-dashoffset 0.28s ease, opacity 2.8s ease;
}

body.afterglow .ring-progress {
  opacity: 0;
}

.ring-time {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0.45rem;
  place-items: center;
  text-align: center;
}

.ring-time span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 750;
  letter-spacing: 0;
}

.time {
  font-variant-numeric: tabular-nums;
  font-size: clamp(3.9rem, 11vw, 7.8rem);
  font-weight: 750;
  line-height: 0.82;
  letter-spacing: 0;
}

.session-note {
  max-height: 2rem;
  max-width: 38rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.22rem);
  opacity: 1;
  overflow: hidden;
  transition:
    opacity 0.72s cubic-bezier(0.22, 1, 0.36, 1),
    max-height 0.72s cubic-bezier(0.22, 1, 0.36, 1),
    margin 0.72s cubic-bezier(0.22, 1, 0.36, 1);
}

.progress-wrap {
  display: grid;
  gap: 0;
}

.intervals {
  display: grid;
  grid-template-columns: repeat(var(--interval-count, 3), minmax(0, 1fr));
  gap: 0.45rem;
}

.intervals span {
  height: 0.28rem;
  border-radius: 999px;
  background: rgba(38, 51, 47, 0.14);
}

.intervals span.done {
  background: var(--accent);
}

.controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, max-content));
  gap: 0.7rem;
  align-items: center;
  min-height: 3rem;
}

.primary,
.secondary {
  min-height: 3rem;
  border-radius: 8px;
  padding: 0 1.1rem;
  font-weight: 750;
  grid-row: 1;
  opacity: 0;
  transform: translateY(0.35rem);
  pointer-events: none;
  transition: opacity 0.24s ease, transform 0.24s ease;
}

.primary.is-visible,
.secondary.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.primary {
  min-width: 9rem;
  grid-column: 1;
  background: var(--ink);
  color: #fffdf7;
  box-shadow: inset 0 0 0 1px transparent;
  transition:
    opacity 0.24s ease,
    transform 0.24s ease,
    background-color 0.32s ease,
    color 0.32s ease,
    box-shadow 0.32s ease;
}

.primary.is-reset {
  background: transparent;
  color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--line);
}

.secondary {
  grid-column: 2;
  background: var(--soft);
  color: var(--ink);
}

.compact {
  min-height: 2.5rem;
  padding: 0 0.8rem;
  font-size: 0.9rem;
}

.settings-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.settings-head span,
small {
  color: var(--muted);
  font-size: 0.82rem;
}

.field {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.55rem 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.field span,
.field output {
  color: var(--ink);
  font-weight: 700;
}

.field input[type="range"] {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--accent);
}

body.running .sky span {
  animation-duration: 8s;
}

body.settings-leaving .app,
body.session-active .app {
  gap: 0;
}

body.settings-leaving .settings-shell,
body.session-active .settings-shell {
  width: 0;
  opacity: 0;
}

body.session-active .practice {
  min-height: calc(100svh - 2rem);
}

body.settings-leaving .settings,
body.session-active .settings {
  pointer-events: none;
  opacity: 0;
  transform: translateX(0.75rem);
}

body.settings-leaving .session-note,
body.session-active .session-note {
  opacity: 0;
  max-height: 0;
  margin: 0;
}

@media (max-width: 860px) {
  .app {
    flex-direction: column;
  }

  .practice {
    min-height: 66svh;
  }

  .timer-ring {
    width: min(78vw, 24rem);
  }

  .settings {
    align-self: stretch;
    width: 100%;
    min-width: 0;
  }

  .settings-shell {
    width: 100%;
    max-height: 28rem;
    transition: max-height 0.62s ease;
  }

  body.session-active .app {
    gap: 0;
  }

  body.settings-leaving .settings-shell,
  body.session-active .settings-shell {
    width: 100%;
    max-height: 0;
    min-height: 0;
  }

  body.settings-leaving .settings,
  body.session-active .settings {
    transform: translateY(1rem);
  }
}

@media (max-width: 520px) {
  .practice,
  .settings {
    border-radius: 0;
  }

  .app {
    gap: 0.8rem;
    padding: 0;
  }

  .practice {
    min-height: 62svh;
  }

  body.session-active .practice {
    min-height: 100svh;
  }

  .timer-ring {
    width: min(82vw, 21rem);
  }
}

@media (orientation: landscape) and (max-height: 520px) and (max-width: 950px) {
  .app {
    flex-direction: column;
    gap: 0.55rem;
    padding: 0;
  }

  .practice,
  .settings {
    border-radius: 0;
  }

  .practice {
    min-height: calc(100svh - 2.75rem);
    gap: clamp(0.55rem, 2.1svh, 0.9rem);
    padding: max(0.75rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(0.75rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  }

  body.settings-leaving .practice,
  body.session-active .practice {
    min-height: 100svh;
  }

  .timer-ring {
    width: min(54svh, 42vw, 18rem);
  }

  .time {
    font-size: clamp(2.9rem, 13svh, 5rem);
  }

  .ring-time {
    gap: 0.32rem;
  }

  .session-note {
    max-height: 1.5rem;
    margin-top: 0.55rem;
    font-size: 0.95rem;
  }

  .intervals {
    gap: 0.34rem;
  }

  .intervals span {
    height: 0.22rem;
  }

  .controls {
    min-height: 2.65rem;
  }

  .primary,
  .secondary {
    min-height: 2.65rem;
    padding: 0 0.95rem;
  }

  .settings {
    align-self: stretch;
    width: 100%;
    min-width: 0;
  }

  .settings-shell {
    width: 100%;
    max-height: 28rem;
    transition: max-height 0.62s ease;
  }

  body.settings-leaving .settings-shell,
  body.session-active .settings-shell {
    width: 100%;
    max-height: 0;
    min-height: 0;
  }

  body.settings-leaving .settings,
  body.session-active .settings {
    transform: translateY(1rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}