:root {
  --bg: #f5f3ef;
  --bg-card: #ffffff;
  --text: #2a2a2a;
  --text-muted: #8a8680;
  --accent: #6b5b95;
  --accent-light: #e8e4f0;
  --border: rgba(0, 0, 0, 0.08);
  --danger: #c94a4a;
  --success: #4a8960;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  --safe-top: env(safe-area-inset-top);
  --safe-bottom: env(safe-area-inset-bottom);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a1c;
    --bg-card: #2a2a2d;
    --text: #f0ede8;
    --text-muted: #9a958e;
    --accent: #9b8bc4;
    --accent-light: #3a3348;
    --border: rgba(255, 255, 255, 0.08);
  }
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  overscroll-behavior: none;
}

#app {
  max-width: 520px;
  margin: 0 auto;
  padding: calc(var(--safe-top) + 20px) 20px calc(var(--safe-bottom) + 20px);
  min-height: 100vh;
}

@media (max-width: 420px) {
  #app {
    padding: calc(var(--safe-top) + 16px) 12px calc(var(--safe-bottom) + 16px);
  }
  .card {
    padding: 14px 12px;
  }
}

.view {
  display: none;
}
.view.active {
  display: block;
}

.app-header {
  margin-bottom: 24px;
  text-align: center;
}
.app-header h1 {
  margin: 0;
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.5px;
}
.subtitle {
  margin: 4px 0 0;
  color: var(--text-muted);
  font-size: 15px;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 12px;
}
.section-header h2 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.muted {
  color: var(--text-muted);
  font-size: 14px;
}

#intervals-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.interval-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 10px;
}
.interval-row .idx {
  color: var(--text-muted);
  font-size: 13px;
  min-width: 20px;
}
.interval-row input[type="text"] {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 15px;
  padding: 6px 8px;
  border-radius: 6px;
  text-overflow: ellipsis;
}
.interval-row input[type="text"]:focus {
  background: var(--bg-card);
  outline: none;
}
.interval-row input[type="number"] {
  width: 52px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 14px;
  padding: 6px;
  border-radius: 6px;
  text-align: center;
  -moz-appearance: textfield;
}
.interval-row input[type="number"]::-webkit-outer-spin-button,
.interval-row input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.interval-row .unit {
  font-size: 12px;
  color: var(--text-muted);
}
.interval-row .remove {
  background: transparent;
  border: none;
  color: var(--danger);
  font-size: 20px;
  padding: 4px 8px;
  cursor: pointer;
}

/* Tighten the interval row on narrow screens so long names like
   "Watching the breath" don't truncate. */
@media (max-width: 420px) {
  .interval-row {
    gap: 4px;
    padding: 8px 8px;
  }
  .interval-row .idx {
    min-width: 14px;
    font-size: 12px;
  }
  .interval-row input[type="text"] {
    font-size: 14px;
    padding: 6px 4px;
  }
  .interval-row input[type="number"] {
    width: 38px;
    font-size: 13px;
    padding: 5px 2px;
  }
  .interval-row .unit {
    font-size: 11px;
    margin-left: -2px;
  }
  .interval-row .remove {
    font-size: 18px;
    padding: 4px 2px;
  }
}

.add-row {
  margin-bottom: 12px;
}

.preset-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  gap: 12px;
}
.setting-row label {
  font-size: 15px;
  flex: 1;
}
.setting-row select,
.setting-row input[type="range"] {
  flex-basis: 140px;
  flex-shrink: 0;
}
.setting-row select {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 8px;
  -webkit-appearance: none;
  appearance: none;
}
.setting-row input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}
.setting-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
}

.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 28px;
  flex-shrink: 0;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.switch .slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 28px;
  transition: 0.2s;
  cursor: pointer;
}
.switch .slider::before {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}
.switch input:checked + .slider {
  background: var(--accent);
}
.switch input:checked + .slider::before {
  transform: translateX(20px);
}

.btn {
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 0.1s, background 0.15s;
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
}
.btn:active {
  transform: scale(0.97);
}
.btn-primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.btn-large {
  width: 100%;
  padding: 16px;
  font-size: 17px;
  font-weight: 600;
  border-radius: var(--radius);
}
.btn-ghost {
  background: transparent;
  width: 100%;
}
.btn-small {
  padding: 8px 12px;
  font-size: 13px;
}
.btn-danger {
  color: var(--danger);
}

/* Running view */
.run-container {
  text-align: center;
  padding: 40px 0;
}
.phase-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin: 0 0 8px;
}
.phase-name {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 32px;
}

.progress-container {
  position: relative;
  width: 260px;
  height: 260px;
  margin: 0 auto 24px;
}
.progress-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}
.progress-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 4;
}
.progress-fg {
  fill: none;
  stroke: var(--accent);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 628.3;
  stroke-dashoffset: 628.3;
  transition: stroke-dashoffset 0.3s linear;
}
.progress-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.time-display {
  font-size: 56px;
  font-weight: 300;
  font-variant-numeric: tabular-nums;
  letter-spacing: -1px;
}
.upcoming {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
  min-height: 20px;
}
.control-row {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.control-row .btn {
  flex: 1;
  max-width: 110px;
}

/* Done view */
.done-container {
  text-align: center;
  padding: 80px 20px 40px;
}
.done-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-weight: 300;
}
.done-container h2 {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 600;
}
.done-container p {
  margin: 0 0 32px;
  font-size: 16px;
}
.done-container .btn {
  min-width: 180px;
  padding: 14px 20px;
}

/* Footer note (PWA install hint) */
.footer-note {
  text-align: center;
  margin: 20px 0 16px;
  font-size: 13px;
  line-height: 1.5;
  padding: 0 8px;
}

/* Sessions list */
#sessions-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.session-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: border-color 0.15s, background 0.15s;
}
.session-item:active {
  background: var(--accent-light);
}
.session-item.active {
  border-color: var(--accent);
  background: var(--accent-light);
}
.session-item .session-info {
  flex: 1;
  min-width: 0;
}
.session-item .session-name {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.session-item .session-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}
.session-item .session-delete {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  line-height: 1;
  padding: 4px 8px;
  cursor: pointer;
  flex-shrink: 0;
}
.session-item .session-delete:hover {
  color: var(--danger);
}
.empty-hint {
  margin: 4px 0 0;
}
.empty-hint.hidden,
#sessions-list.hidden {
  display: none;
}

.session-action-row {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}
.session-action-row .btn {
  flex: 1;
}
.session-action-row .btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.session-action-row .btn.dirty {
  border-color: var(--accent);
  color: var(--accent);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal.open {
  display: flex;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
}
.modal-card {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}
.modal-card h3 {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 600;
}
.modal-card input[type="text"] {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
}
.modal-card input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}
.modal-error {
  min-height: 18px;
  margin: 6px 0 12px;
  color: var(--danger);
}
.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}
.modal-actions .btn {
  min-width: 90px;
}