*, *::before, *::after {
  box-sizing: border-box; margin: 0; padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --bg: #0d0d0d;
  --surface: #161616;
  --border: #2a2a2a;
  --text: #f0f0f0;
  --muted: #555;
  --dim: #2a2a2a;
  --green: #39e079;
  --green-dim: rgba(57,224,121,0.1);
  --orange: #ff9500;
  --red: #ff3b30;
}

html, body {
  height: 100%; width: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'Barlow', sans-serif;
  font-weight: 300;
  touch-action: manipulation;
}

/* ── SCREENS ── */
.screen {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: opacity 0.25s, transform 0.25s;
}

.screen.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
}

/* ── BLINK OVERLAY ──
   The whole screen pulses green when rest time is up, until user taps.
*/
#blink-overlay {
  position: fixed;
  inset: 0;
  background: var(--green);
  opacity: 0;
  pointer-events: none;
  z-index: 500;
  display: none;
}

#blink-overlay.active {
  display: block;
  animation: screenBlink 1s ease-in-out infinite;
}

@keyframes screenBlink {
  0%, 100% { opacity: 0;    }
  50%       { opacity: 0.35; }
}

/* ── SETTINGS SCREEN ── */
#settings-screen {
  background: var(--bg);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.settings-header {
  padding: max(env(safe-area-inset-top,0px), 2.5rem) 1.5rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.settings-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text);
}

.settings-sub {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.25rem;
  letter-spacing: 0.03em;
}

.settings-body {
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
}

.setting-group {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
}

.setting-group:last-of-type { border-bottom: none; }

.setting-label {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.85rem;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.setting-row-spaced {
  margin-bottom: 1.1rem;
}

.setting-name {
  font-size: 1rem;
  font-weight: 300;
  color: var(--text);
}

.setting-hint {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.15rem;
  line-height: 1.4;
}

/* Presets row */
.presets-row {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.preset-pill {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 99px;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--muted);
  cursor: pointer;
  background: none;
  transition: all 0.15s;
}

.preset-pill.active,
.preset-pill:active {
  background: var(--green-dim);
  border-color: var(--green);
  color: var(--green);
}

/* Stepper */
.stepper {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  flex-shrink: 0;
}

.stepper-btn {
  width: 46px; height: 46px;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.12s;
}
.stepper-btn:active { background: var(--border); }

.stepper-val {
  min-width: 60px;
  text-align: center;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  height: 46px;
  display: flex; align-items: center; justify-content: center;
}

/* Toggle */
.toggle-wrap { position: relative; width: 51px; height: 31px; flex-shrink: 0; }
.toggle-input { display: none; }
.toggle-track {
  position: absolute; inset: 0;
  border-radius: 31px;
  background: var(--border);
  cursor: pointer;
  transition: background 0.2s;
}
.toggle-input:checked + .toggle-track { background: var(--green); }
.toggle-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 27px; height: 27px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 1px 4px rgba(0,0,0,0.4);
  transition: transform 0.2s;
  pointer-events: none;
}
.toggle-input:checked ~ .toggle-thumb { transform: translateX(20px); }

/* Start button */
.start-btn-wrap {
  padding: 0 1.5rem;
}

.start-btn {
  margin: 1.5rem 0 max(env(safe-area-inset-bottom,0px), 2rem);
  width: 100%;
  padding: 1.1rem;
  background: var(--green);
  border: none;
  border-radius: 16px;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #0d0d0d;
  cursor: pointer;
  transition: all 0.15s;
}
.start-btn:active { transform: scale(0.98); }

/* ── TIMER SCREEN ── */
#timer-screen {
  background: var(--bg);
}

/* Three rows: dots / tap-area / controls */
.set-counter {
  flex-shrink: 0;
  padding: max(env(safe-area-inset-top,0px), 0.85rem) 1rem 0.6rem;
  text-align: center;
}

.sets-display {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  min-height: 18px;
}

.set-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--muted);
  transition: all 0.3s;
}
.set-dot.done    { background: var(--green); border-color: var(--green); }
.set-dot.current { border-color: var(--text); }

.overflow-count {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-left: 4px;
}

/* Tap zone — fills remaining space */
.tap-zone {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  min-height: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* Ring */
.ring-wrap {
  position: absolute;
  inset: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.ring-svg {
  width: min(62vw, 48vh);
  height: min(62vw, 48vh);
  transform: rotate(-90deg);
}

.ring-bg   { fill: none; stroke: var(--dim); stroke-width: 4; }
.ring-fill {
  fill: none;
  stroke: var(--green);
  stroke-width: 4;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.9s linear, stroke 0.4s;
}

/* Digits sit on top */
.timer-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  pointer-events: none;
}

.timer-phase {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.3s;
}

.timer-digits {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(4rem, 22vw, 7rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: color 0.3s;
  font-variant-numeric: tabular-nums;
}

/* Play icon state */
#timer-screen.phase-idle .timer-digits {
  font-size: clamp(2.5rem, 14vw, 5rem);
  color: var(--green);
  opacity: 0.85;
}

.timer-sub {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
  min-height: 1rem;
}

/* Bottom controls */
.timer-bottom {
  flex-shrink: 0;
  padding: 0.6rem 1rem max(env(safe-area-inset-bottom,0px), 1rem);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.timer-hint {
  text-align: center;
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.bottom-controls {
  display: flex;
  gap: 0.6rem;
}

.ctrl-btn {
  flex: 1;
  padding: 0.7rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  color: var(--muted);
  transition: all 0.15s;
}
.ctrl-btn:active { background: #222; }
.ctrl-btn.danger { color: var(--red); border-color: rgba(255,59,48,0.2); }

/* Color states */
.phase-rest  .timer-digits { color: var(--orange); }
.phase-rest  .ring-fill    { stroke: var(--orange); }
.phase-rest  .timer-phase  { color: var(--orange); }

.phase-alert .timer-digits { color: var(--green); }
.phase-alert .ring-fill    { stroke: var(--green); }
.phase-alert .timer-phase  { color: var(--green); }

/* Urgent pulse on last 5s */
@keyframes urgentPulse {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.3; }
}
.urgent { animation: urgentPulse 0.75s ease-in-out infinite; }