:root {
  --bg: #08080a;
  --case: #17171b;
  --case-hi: #232329;
  --case-lo: #0d0d10;
  --border: #000000;
  --text: #e8e6df;
  --text-dim: #7a7a82;
  --amber: #ffb000;
  --amber-dim: #4d3600;
  --red: #ff3b30;
  --red-dim: #4a0f0c;
  --green: #33ff99;
  --green-dim: #0c3d26;
  --blue: #2fb8ff;
  --blue-dim: #0c3049;
  --font-display: "Courier New", "Consolas", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
}

body {
  background:
    radial-gradient(circle at 50% -10%, #1a1a1f 0%, #08080a 60%);
}

#app {
  height: 100dvh;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.screen {
  display: none;
  flex: 1;
  min-height: 0;
  padding: 14px;
}
.screen.active { display: flex; }

/* ---------- Device "case" panel shared across all 3 screens ---------- */

.panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: linear-gradient(180deg, var(--case-hi), var(--case) 12%, var(--case) 88%, var(--case-lo));
  border-radius: 22px;
  border: 1px solid #000;
  box-shadow:
    0 0 0 2px #2c2c33 inset,
    0 0 0 4px #000 inset,
    0 18px 40px rgba(0,0,0,0.55),
    0 1px 0 rgba(255,255,255,0.04) inset;
  overflow: hidden;
  position: relative;
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 16px 10px;
  flex-shrink: 0;
}

.panel-title {
  flex: 1;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.28em;
  color: var(--amber);
  text-shadow: 0 0 6px rgba(255,176,0,0.55);
}

.chip-btn {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  background: linear-gradient(180deg, #2a2a30, #17171b);
  border: 1px solid #000;
  border-radius: 8px;
  padding: 8px 14px;
  box-shadow: 0 2px 0 #000, 0 3px 4px rgba(0,0,0,0.5), 0 1px 0 rgba(255,255,255,0.06) inset;
  cursor: pointer;
}
.chip-btn:active {
  transform: translateY(1px);
  box-shadow: 0 1px 0 #000, 0 1px 2px rgba(0,0,0,0.5);
}
.chip-btn-danger {
  color: var(--red);
  text-shadow: 0 0 6px rgba(255,59,48,0.5);
}

.led-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 8px 2px rgba(255,59,48,0.9);
  animation: blink 1s steps(2, jump-none) infinite;
  flex-shrink: 0;
}
@keyframes blink {
  50% { opacity: 0.25; }
}

/* decorative speaker grille strip */
.grille {
  height: 10px;
  margin: 0 16px 8px;
  border-radius: 6px;
  flex-shrink: 0;
  background-image: repeating-linear-gradient(
    90deg,
    #000 0px,
    #000 3px,
    transparent 3px,
    transparent 7px
  );
  background-color: var(--case-lo);
  box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 -1px 2px rgba(0,0,0,0.6) inset;
  opacity: 0.8;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 4px 20px 12px;
  -webkit-overflow-scrolling: touch;
}

.panel-footer {
  flex-shrink: 0;
  padding: 14px 18px calc(16px + env(safe-area-inset-bottom));
}

/* ---------- Setup screen ---------- */

.setup-row {
  display: flex;
  gap: 14px;
  padding: 10px 0;
}

.setup-field {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setup-label {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.setup-sublabel {
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: none;
  color: #55555e;
}

.setup-input-wrap {
  display: flex;
  align-items: baseline;
  gap: 8px;
  background: #000;
  border-radius: 10px;
  padding: 10px 14px;
  box-shadow: 0 0 0 1px #2c2c33, 0 2px 6px rgba(0,0,0,0.6) inset;
}

.setup-input-wrap input[type="number"] {
  flex: 1;
  width: 100%;
  min-width: 0;
  background: transparent;
  border: none;
  color: var(--amber);
  text-shadow: 0 0 8px rgba(255,176,0,0.6);
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.setup-input-wrap input[type="number"]:focus { outline: none; }
.setup-input-wrap input::placeholder { color: #6b4c00; }

.unit {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  flex-shrink: 0;
}

.setup-divider {
  display: flex;
  align-items: center;
  margin: 14px 0 4px;
  color: var(--text-dim);
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.3em;
}
.setup-divider::before,
.setup-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, #2c2c33, transparent);
}
.setup-divider span {
  padding: 0 10px;
  white-space: nowrap;
}

.setup-hint {
  margin: 0;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

.big-btn {
  width: 100%;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.2em;
  color: var(--text);
  background: linear-gradient(180deg, #2a2a30, #17171b);
  border: 1px solid #000;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 4px 0 #000, 0 8px 14px rgba(0,0,0,0.55), 0 1px 0 rgba(255,255,255,0.06) inset;
  cursor: pointer;
}
.big-btn:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 #000, 0 2px 6px rgba(0,0,0,0.5);
}
.start-btn {
  color: var(--green);
  text-shadow: 0 0 8px rgba(51,255,153,0.55);
}
.start-btn:disabled {
  color: var(--text-dim);
  text-shadow: none;
  cursor: not-allowed;
  opacity: 0.6;
}

/* ---------- Run screen ---------- */

.run-total-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 4px 22px 10px;
  flex-shrink: 0;
}
.run-total-label {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}
.run-total-clock {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
  text-shadow: 0 0 6px rgba(255,176,0,0.5);
  letter-spacing: 0.05em;
}

.run-display {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 0 16px;
  border-radius: 14px;
  background: #000;
  box-shadow: 0 0 0 1px #2c2c33, 0 4px 16px rgba(0,0,0,0.6) inset;
  padding: 20px;
  transition: box-shadow 0.4s ease;
}

.phase-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.18em;
  color: var(--amber);
  text-shadow: 0 0 10px rgba(255,176,0,0.6);
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.phase-clock {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 72px;
  line-height: 1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
  text-shadow: 0 0 16px rgba(255,176,0,0.6);
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.get-ready {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--red);
  text-shadow: 0 0 8px rgba(255,59,48,0.7);
  opacity: 0;
  animation: none;
}
.get-ready.show {
  animation: pulse 0.5s steps(2, jump-none) infinite;
}
@keyframes pulse {
  50% { opacity: 0.15; }
  0%, 100% { opacity: 1; }
}

/* phase color themes */
.run-display.phase-warmup .phase-label,
.run-display.phase-warmup .phase-clock { color: var(--amber); text-shadow: 0 0 14px rgba(255,176,0,0.6); }
.run-display.phase-warmup { box-shadow: 0 0 0 1px var(--amber-dim), 0 0 24px rgba(255,176,0,0.15) inset; }

.run-display.phase-fast .phase-label,
.run-display.phase-fast .phase-clock { color: var(--red); text-shadow: 0 0 14px rgba(255,59,48,0.65); }
.run-display.phase-fast { box-shadow: 0 0 0 1px var(--red-dim), 0 0 24px rgba(255,59,48,0.18) inset; }

.run-display.phase-slow .phase-label,
.run-display.phase-slow .phase-clock { color: var(--green); text-shadow: 0 0 14px rgba(51,255,153,0.55); }
.run-display.phase-slow { box-shadow: 0 0 0 1px var(--green-dim), 0 0 24px rgba(51,255,153,0.15) inset; }

.run-display.phase-cooldown .phase-label,
.run-display.phase-cooldown .phase-clock { color: var(--blue); text-shadow: 0 0 14px rgba(47,184,255,0.6); }
.run-display.phase-cooldown { box-shadow: 0 0 0 1px var(--blue-dim), 0 0 24px rgba(47,184,255,0.16) inset; }

.run-tally {
  display: flex;
  justify-content: center;
  gap: 28px;
  padding: 14px 16px calc(4px + env(safe-area-inset-bottom));
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  flex-shrink: 0;
}
.run-tally b {
  color: var(--text);
  font-size: 15px;
  margin-left: 4px;
}

.tally-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}
.tally-dot.fast { background: var(--red); box-shadow: 0 0 6px rgba(255,59,48,0.8); }
.tally-dot.slow { background: var(--green); box-shadow: 0 0 6px rgba(51,255,153,0.8); }

/* ---------- Done screen ---------- */

.done-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 10px;
  padding-top: 20px;
}

.done-total-label {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--text-dim);
}

.done-total-clock {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 56px;
  color: var(--amber);
  text-shadow: 0 0 16px rgba(255,176,0,0.6);
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}

.done-tally {
  display: flex;
  gap: 16px;
  width: 100%;
  margin-top: 10px;
}

.done-tally-item {
  flex: 1;
  background: #000;
  border-radius: 12px;
  box-shadow: 0 0 0 1px #2c2c33, 0 4px 10px rgba(0,0,0,0.5) inset;
  padding: 16px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.done-tally-label {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}

.done-tally-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 34px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 360px) {
  .phase-clock { font-size: 58px; }
  .done-total-clock { font-size: 44px; }
}