@import url("https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,600&family=Outfit:wght@400;500;600;700&display=swap");

:root {
  --bg-a: #e6f1ec;
  --bg-b: #edf5f1;
  --card-bg: rgba(255, 255, 255, 0.82);
  --surface: rgba(255, 255, 255, 0.8);
  --surface-strong: rgba(255, 255, 255, 0.88);
  --ink: #213433;
  --muted: #627a79;
  --line: rgba(46, 84, 80, 0.18);
  --phase: #2f9b8d;
  --phase-strong: #247a6f;
  --phase-soft: rgba(47, 155, 141, 0.2);
  --phase-fill: rgba(47, 155, 141, 0.68);
  --toggle-accent: #3c7b73;
  --core-scale: 0.78;
  --container-fill: 0;
  --hold-progress: 0;
  --hold-visibility: 0;
  --hold-alert: 0;
  --hold-start-rotation: 0deg;
}

* {
  box-sizing: border-box;
}

html {
  width: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
  font-family: "Outfit", sans-serif;
  color: var(--ink);
  background: var(--bg-b);
  transition: background-color 0.8s ease;
}

body[data-phase="inhale"] {
  --bg-a: #e4f3ee;
  --bg-b: #eaf6f1;
  --phase: #2d9f91;
  --phase-strong: #1f786d;
  --phase-soft: rgba(45, 159, 145, 0.2);
  --phase-fill: rgba(45, 159, 145, 0.7);
}

body[data-phase="hold-high"] {
  --bg-a: #f2f0e1;
  --bg-b: #f6f3e5;
  --phase: #a08d46;
  --phase-strong: #786a34;
  --phase-soft: rgba(160, 141, 70, 0.22);
  --phase-fill: rgba(160, 141, 70, 0.72);
}

body[data-phase="exhale"] {
  --bg-a: #e4ecf8;
  --bg-b: #e9f0fa;
  --phase: #5d87c6;
  --phase-strong: #44699e;
  --phase-soft: rgba(93, 135, 198, 0.2);
  --phase-fill: rgba(93, 135, 198, 0.7);
}

body[data-phase="hold-low"] {
  --bg-a: #e8edef;
  --bg-b: #edf2f4;
  --phase: #6d838b;
  --phase-strong: #52686f;
  --phase-soft: rgba(109, 131, 139, 0.2);
  --phase-fill: rgba(109, 131, 139, 0.68);
}

.shell {
  width: min(calc(100vw - 2rem), 620px);
  max-width: 100%;
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.card {
  position: relative;
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: clamp(1rem, 2.6vw, 1.35rem);
  box-shadow: 0 18px 44px rgba(31, 54, 52, 0.12);
  backdrop-filter: blur(10px);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.18);
  pointer-events: none;
  z-index: 0;
}

.header,
.visualizer,
.quote-card,
.settings {
  position: relative;
  z-index: 1;
}

.header {
  margin-bottom: 0.98rem;
  text-align: center;
}

.eyebrow {
  margin: 0;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}

h1 {
  margin: 0.14rem 0 0;
  font-family: "Newsreader", serif;
  font-size: clamp(2rem, 4.9vw, 2.65rem);
  line-height: 1.05;
  letter-spacing: 0.01em;
}

.subhead {
  margin: 0.42rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.visualizer {
  --scene-scale: 1;
  --scene-max-size: min(calc(84vw * 1.3), calc(430px * 1.3), 92vw);
  width: 100%;
  display: grid;
  justify-items: center;
  align-content: end;
  gap: 0.4rem;
  min-height: calc(var(--scene-max-size) + 2rem);
  margin: 0 0 0.95rem;
  position: relative;
  z-index: 2;
}

.elapsed {
  margin: 0;
  border: 0;
  background: none;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  letter-spacing: 0.03em;
}

.scene {
  position: relative;
  width: min(100%, calc(84vw * var(--scene-scale)), calc(430px * var(--scene-scale)), 92vw);
  aspect-ratio: 1 / 1;
  border-radius: 26px;
  border: 1px solid var(--line);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.scene-glow {
  position: absolute;
  inset: 0;
  background: var(--phase-soft);
  opacity: 0.5;
  transition: background-color 0.5s ease, opacity 0.35s ease;
  z-index: 1;
}

.scene-fill {
  position: absolute;
  inset: 0;
  transform-origin: bottom center;
  transform: scaleY(var(--container-fill));
  background: var(--phase-fill);
  transition: transform 0.11s linear, background 0.35s ease;
  pointer-events: none;
  z-index: 2;
}

.scene-fill::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 2px;
  background: var(--phase-strong);
  opacity: 0.52;
}

.hold-ring {
  position: absolute;
  inset: 6%;
  opacity: calc(var(--hold-visibility) * (0.34 + var(--hold-alert) * 0.5));
  filter: drop-shadow(0 0 calc(3px + var(--hold-alert) * 6px) var(--phase-soft));
  transition: opacity 0.2s ease-out;
  pointer-events: none;
  z-index: 4;
}

.hold-trace {
  width: 100%;
  height: 100%;
  display: block;
}

.hold-track,
.hold-progress {
  fill: none;
  stroke-width: 3.5;
}

.hold-track {
  stroke: rgba(40, 72, 69, 0.16);
}

.hold-progress {
  stroke: var(--phase-strong);
  stroke-linecap: round;
  stroke-dasharray: 100;
  stroke-dashoffset: calc(100 - (var(--hold-progress) * 100));
  transform-box: fill-box;
  transform-origin: 50% 50%;
  transform: rotate(var(--hold-start-rotation));
  transition: stroke 0.35s ease, stroke-dashoffset 0.09s linear;
}

.breath-core {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 46%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: #f7fbfc;
  border: 2px solid var(--phase);
  box-shadow: inset 0 0 0 1px var(--phase-soft);
  transform: translate(-50%, -50%) scale(var(--core-scale));
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
  z-index: 5;
}

.breath-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: grid;
  gap: 0.18rem;
  justify-items: center;
  pointer-events: none;
  z-index: 6;
}

.instruction,
.countdown {
  margin: 0;
  will-change: opacity;
  backface-visibility: hidden;
}

.instruction {
  font-size: clamp(1.12rem, 3.1vw, 1.52rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--phase-strong);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.35);
  transition: color 0.35s ease, opacity 0.24s ease;
}

.countdown {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--phase-strong);
  transition: color 0.35s ease, opacity 0.24s ease;
}

.quote-card {
  width: 100%;
  margin: 0.24rem 0 0.9rem;
  padding: 0.92rem 0.9rem 2.9rem;
  border: 1px solid rgba(46, 84, 80, 0.14);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.76), rgba(255, 255, 255, 0.68)),
    linear-gradient(145deg, rgba(255, 255, 255, 0) 35%, var(--phase-soft) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), inset 0 -1px 0 rgba(46, 84, 80, 0.05);
  min-height: clamp(10rem, 24vw, 11.4rem);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.42rem;
  overflow: hidden;
  isolation: isolate;
  z-index: 1;
}

.quote-text {
  margin: 0;
  font-family: "Newsreader", serif;
  font-size: clamp(1rem, 2.3vw, 1.16rem);
  line-height: 1.42;
  color: var(--ink);
  overflow: visible;
  display: block;
  padding-right: 0;
  padding-bottom: 0;
  text-align: center;
  transition: opacity 0.24s ease;
  position: relative;
  z-index: 1;
  will-change: opacity;
  backface-visibility: hidden;
}

.quote-author {
  margin: 0;
  width: 100%;
  text-align: right;
  font-size: 0.83rem;
  letter-spacing: 0.02em;
  color: var(--phase-strong);
  transition: color 0.35s ease, opacity 0.24s ease;
  position: relative;
  z-index: 1;
  margin-bottom: 0;
  will-change: opacity;
  backface-visibility: hidden;
}

.quote-footer {
  position: absolute;
  left: 0.9rem;
  right: auto;
  bottom: 0.72rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 0.24rem;
  z-index: 1;
}

.quote-refresh {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  white-space: nowrap;
}

.quote-controls {
  display: flex;
  align-items: center;
  gap: 0.44rem;
}

.quote-auto {
  display: inline-flex;
  align-items: center;
  gap: 0.26rem;
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  user-select: none;
}

.quote-auto input {
  margin: 0;
  width: 0.86rem;
  height: 0.86rem;
  accent-color: var(--toggle-accent);
}

.quote-shuffle {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
  font: inherit;
  font-size: 0.73rem;
  line-height: 1;
  padding: 0.31rem 0.62rem;
  cursor: pointer;
  transition: border-color 0.22s ease, background-color 0.22s ease, opacity 0.2s ease;
}

.quote-shuffle:hover {
  border-color: rgba(46, 84, 80, 0.3);
  background: rgba(255, 255, 255, 0.9);
}

.quote-shuffle:focus-visible {
  outline: 2px solid var(--phase-strong);
  outline-offset: 2px;
}

.quote-shuffle:disabled,
.quote-auto input:disabled,
.quote-auto input:disabled + span {
  opacity: 0.5;
  cursor: not-allowed;
}

.instruction.is-fading,
.countdown.is-fading,
.quote-text.is-fading,
.quote-author.is-fading {
  opacity: 0;
}

.settings {
  margin-top: 0.2rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  padding: 0.72rem;
}

.settings-title {
  margin: 0 0 0.58rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.size-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.56rem;
  margin-bottom: 0.72rem;
}

.size-control {
  margin-bottom: 0;
  padding: 0.52rem 0.62rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-strong);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.size-sound-toggle {
  min-height: 100%;
}

.size-inline-label {
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  color: var(--ink);
  font-weight: 500;
  white-space: nowrap;
  flex-shrink: 0;
}

.size-control-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

#size-slider {
  flex: 1 1 auto;
  min-width: 0;
  accent-color: var(--toggle-accent);
}

#size-value {
  min-width: 3.2ch;
  text-align: right;
  font-size: 0.8rem;
  color: var(--muted);
}

.toggles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.56rem;
  margin-bottom: 0.72rem;
}

.toggle-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.56rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-strong);
  font-size: 0.89rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.toggle-item span {
  color: var(--ink);
  font-weight: 500;
  white-space: nowrap;
}

.toggle-item input {
  appearance: none;
  margin: 0;
  width: 2.1rem;
  height: 1.2rem;
  border-radius: 999px;
  border: 1px solid rgba(53, 93, 89, 0.34);
  background: rgba(123, 146, 143, 0.3);
  position: relative;
  cursor: pointer;
  transition: background-color 0.22s ease, border-color 0.22s ease;
}

.toggle-item input:focus-visible {
  outline: 2px solid var(--phase-strong);
  outline-offset: 2px;
}

.toggle-item input::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 1px;
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  transition: transform 0.22s ease;
}

.toggle-item input:checked {
  background: var(--toggle-accent);
  border-color: var(--toggle-accent);
}

.toggle-item input:checked::after {
  transform: translateX(0.86rem);
}

.toggle-item input:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.controls {
  display: flex;
  gap: 0.55rem;
}

.controls button {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.68rem 0.8rem;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.15s ease, background 0.22s ease, border-color 0.22s ease;
}

.btn-primary {
  background: var(--phase);
  border-color: var(--phase-strong);
  color: #ffffff;
}

.btn-ghost {
  background: var(--surface-strong);
  color: var(--ink);
}

.controls button:hover {
  opacity: 0.94;
}

.controls button:active {
  transform: translateY(1px);
}

.controls button:focus-visible {
  outline: 2px solid var(--phase-strong);
  outline-offset: 2px;
}

.is-hidden {
  display: none;
}

@media (max-width: 560px) {
  .subhead {
    font-size: 0.78rem;
  }

  .visualizer {
    --scene-max-size: min(calc(88vw * 1.3), calc(360px * 1.3), 92vw);
  }

  .scene {
    width: min(100%, calc(88vw * var(--scene-scale)), calc(360px * var(--scene-scale)), 92vw);
    border-radius: 22px;
  }

  .quote-card {
    margin-top: 0.2rem;
    padding-top: 0.84rem;
  }

  .quote-footer {
    left: 0.74rem;
    right: auto;
    gap: 0.22rem;
  }

  .quote-refresh,
  .quote-auto,
  .quote-shuffle {
    font-size: 0.7rem;
  }

  .settings {
    padding: 0.64rem;
  }

  .toggle-item {
    font-size: 0.84rem;
    padding-inline: 0.6rem;
  }
}

@media (max-width: 430px) {
  .size-row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .size-sound-toggle {
    min-height: auto;
  }

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

  .toggle-item {
    min-height: 2.5rem;
  }

  .toggle-item span {
    white-space: normal;
    line-height: 1.2;
  }

  .toggle-item input {
    flex-shrink: 0;
  }
}

@media (min-width: 900px) {
  .shell {
    width: calc(100vw - 2rem);
    max-width: none;
  }

  .card {
    min-height: calc(100vh - 2rem);
  }

  .visualizer {
    --scene-max-size: min(calc(70vh * 1.3), calc(760px * 1.3), 90vw);
  }

  .scene {
    width: min(100%, calc(70vh * var(--scene-scale)), calc(760px * var(--scene-scale)), 90vw);
  }
}

@media (max-height: 780px) {
  body {
    place-items: start center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .instruction,
  .countdown,
  .quote-text,
  .quote-author,
  .controls button,
  .toggle-item input,
  .toggle-item input::after,
  .scene-fill,
  .hold-ring,
  .hold-progress,
  .scene-glow,
  .breath-core {
    transition: none;
  }
}