:root {
  color-scheme: dark;
  --bg: #07152f;
  --surface: #10264d;
  --surface-raised: #173563;
  --text: #f4f8ff;
  --text-muted: #b8cbea;
  --breath: #278bff;
  --breath-light: #65c8ff;
  --breath-bg: #234574;
  --hold: #56d8ff;
  --error: #ff9b9b;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background:
    radial-gradient(ellipse at 50% 42%, rgb(26 83 160 / 34%), transparent 48%),
    radial-gradient(ellipse at 12% 95%, rgb(22 116 204 / 16%), transparent 42%),
    linear-gradient(145deg, #091a38 0%, var(--bg) 52%, #071126 100%);
  background-attachment: fixed;
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

#app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 20px 32px;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--breath-light);
  outline-offset: 3px;
}

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

/* --------------------------------- player --------------------------------- */

.view-player {
  justify-content: center;
  gap: clamp(18px, 3vh, 30px);
  width: min(100%, 1120px);
  min-height: calc(100dvh - 56px);
  margin: 0 auto;
}

.circle-wrap {
  position: relative;
  width: clamp(250px, min(72vw, 55vh), 560px);
  aspect-ratio: 1;
  filter: drop-shadow(0 0 48px rgb(39 139 255 / 22%));
}

.circle-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.circle-bg {
  fill: rgb(12 35 72 / 55%);
  stroke: #3975bd;
  stroke-width: 2;
}

.circle-main {
  fill: url(#breath-gradient) var(--breath);
  filter: drop-shadow(0 12px 26px rgb(20 125 255 / 38%));
  transform-box: fill-box;
  transform-origin: center;
  transition: fill 0.6s ease;
}

.circle-wrap.holding .circle-main {
  fill: var(--hold);
  animation: pulse 2.2s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(0.55);
  }

  50% {
    transform: scale(0.62);
  }
}

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.circle-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  pointer-events: none;
}

.phase-label {
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.05;
  text-shadow: 0 2px 18px rgb(0 41 103 / 35%);
}

.count-label {
  margin-top: 10px;
  color: #020b1b;
  font-size: clamp(1rem, 2vw, 1.4rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.round-label {
  display: grid;
  place-items: center;
  min-height: 40px;
  padding: 7px 18px;
  border: 1px solid rgb(154 200 255 / 32%);
  border-radius: 999px;
  background: linear-gradient(135deg, rgb(30 70 125 / 84%), rgb(15 42 83 / 88%));
  box-shadow: 0 6px 22px rgb(0 0 0 / 16%);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
}

.progress-row {
  display: grid;
  grid-template-columns: 5ch minmax(0, 1fr) 5ch;
  align-items: center;
  gap: clamp(10px, 2vw, 20px);
  width: min(100%, 760px);
}

.time-label {
  color: #dceaff;
  font-size: 0.9rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.time-label:last-child {
  text-align: right;
}

.progress-bar {
  width: 100%;
  height: 9px;
  border: 1px solid rgb(139 190 255 / 18%);
  border-radius: 999px;
  background: #18345e;
  box-shadow: inset 0 2px 5px rgb(0 0 0 / 28%);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--breath), var(--breath-light));
  box-shadow: 0 0 16px rgb(74 173 255 / 70%);
  transition: width 0.1s linear;
}

.controls {
  display: flex;
  gap: 12px;
}

/* ------------------------------- generator -------------------------------- */

.view-generator {
  align-items: stretch;
  width: min(100%, 680px);
  margin: 0 auto;
  gap: 4px;
}

.title {
  font-size: clamp(1.65rem, 4vw, 2.1rem);
  font-weight: 800;
  line-height: 1.12;
  margin: 8px 0 8px;
}

.hint {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0 0 20px;
  max-width: 52ch;
}

.rows {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 12px;
  padding: 14px;
  border: 1px solid rgb(116 169 235 / 16%);
  background: linear-gradient(135deg, rgb(19 47 91 / 95%), rgb(13 34 69 / 95%));
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgb(0 0 0 / 14%);
}

.row label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.field-label {
  font-size: 0.82rem;
}

.row input[type="number"],
.row select {
  min-height: 42px;
  background: #091a38;
  border: 1px solid #315783;
  border-radius: 10px;
  padding: 8px 10px;
  width: 8ch;
}

.row select {
  width: auto;
  max-width: 100%;
}

.custom-phase-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.add-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.row-bpm {
  margin-bottom: 16px;
}

.result {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.link {
  color: var(--breath-light);
  word-break: break-all;
  font-size: 0.9rem;
}

/* --------------------------------- buttons --------------------------------- */

.btn {
  min-height: 44px;
  background: linear-gradient(145deg, #173664, #10264d);
  border: 1px solid #315783;
  border-radius: 14px;
  padding: 10px 17px;
  box-shadow: 0 5px 14px rgb(0 0 0 / 14%);
  font-weight: 700;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.btn:hover {
  border-color: var(--breath-light);
  box-shadow: 0 7px 20px rgb(26 128 255 / 22%);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, #55baff, #1876f2 70%);
  border-color: #71c9ff;
  color: #061735;
  box-shadow: 0 8px 24px rgb(25 125 255 / 30%);
  font-weight: 800;
}

.btn-playback {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  padding: 0;
  border: 2px solid rgb(255 255 255 / 58%);
  border-radius: 50%;
  background: linear-gradient(145deg, #fff, #d5eaff);
  color: #1263ca;
  box-shadow: 0 10px 30px rgb(24 124 255 / 38%), inset 0 2px 3px #fff;
}

.btn-playback:hover {
  border-color: #fff;
  box-shadow: 0 12px 36px rgb(24 124 255 / 54%), inset 0 2px 3px #fff;
}

.btn-playback svg {
  width: 29px;
  height: 29px;
  fill: currentColor;
}

.btn-playback svg.restart-icon {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn-remove {
  min-height: 38px;
  padding: 7px 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
  align-self: center;
}

@media (max-width: 520px) {
  #app {
    padding: 18px 18px 24px;
  }

  .view-player {
    min-height: calc(100dvh - 42px);
    gap: 18px;
  }

  .circle-wrap {
    width: min(78vw, 48vh, 420px);
  }

  .row {
    gap: 10px;
    padding: 12px;
  }

  .custom-phase-fields {
    width: 100%;
  }
}