:root {
  --bg: #0c1118;
  --panel: #161d27;
  --panel-2: #1d2633;
  --text: #e8edf4;
  --muted: #7c8696;
  --accent: #4cc2ff;
  --accent-dim: #2a7fb0;
  --good: #57d9a3;
  --warn: #e8b25b;
  --danger: #e2606b;
}

.rate-ok { color: var(--good); }
.rate-warn { color: var(--warn); }
.rate-high { color: var(--danger); }

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

.hidden { display: none !important; }
.muted { color: var(--muted); }

/* ---------- Home ---------- */

#screen-home {
  max-width: 28rem;
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: calc(env(safe-area-inset-top) + 1.25rem) 1.25rem calc(env(safe-area-inset-bottom) + 1.25rem);
}

.home-header h1 {
  font-size: 1.4rem;
  letter-spacing: 0.02em;
}

.home-header p { margin-top: 0.3rem; font-size: 0.9rem; }

.setup { display: flex; flex-direction: column; gap: 1rem; }

.window-picker {
  display: flex;
  background: var(--panel);
  border-radius: 0.9rem;
  padding: 0.3rem;
  gap: 0.3rem;
}

.window-picker button {
  flex: 1;
  padding: 0.7rem 0;
  border-radius: 0.65rem;
  color: var(--muted);
  font-weight: 600;
}

.window-picker button.selected {
  background: var(--panel-2);
  color: var(--text);
}

.btn-start {
  padding: 1.1rem;
  border-radius: 1rem;
  background: linear-gradient(180deg, var(--accent), var(--accent-dim));
  color: #06141d;
  font-size: 1.3rem;
  font-weight: 700;
}

.btn-start:active { filter: brightness(1.15); }

.history h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

#history-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }

#history-list li {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  background: var(--panel);
  border-radius: 0.9rem;
  padding: 0.8rem 1rem;
}

.entry-main { display: flex; align-items: baseline; gap: 0.2rem; min-width: 4.2rem; }
.entry-rate { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.entry-unit { color: var(--muted); font-size: 0.85rem; }

.entry-meta { flex: 1; color: var(--muted); font-size: 0.85rem; line-height: 1.4; }

.entry-delete {
  color: var(--muted);
  font-size: 1.1rem;
  padding: 0.4rem 0.6rem;
  border-radius: 0.5rem;
}

.entry-delete.armed {
  background: var(--danger);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ---------- Measure ---------- */

.overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
}

#tap-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  user-select: none;
  -webkit-user-select: none;
}

.btn-cancel {
  align-self: flex-start;
  margin: calc(env(safe-area-inset-top) + 1rem) 0 0 1.25rem;
  padding: 0.5rem 1rem;
  border-radius: 0.7rem;
  background: var(--panel);
  color: var(--muted);
}

.measure-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  position: relative;
}

#pulse {
  position: absolute;
  width: 14rem;
  height: 14rem;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
  pointer-events: none;
}

#pulse.pulsing { animation: pulse 0.6s ease-out; }

@keyframes pulse {
  from { opacity: 0.25; transform: scale(0.6); }
  to   { opacity: 0;    transform: scale(1.4); }
}

#big-number {
  font-size: clamp(7rem, 40vw, 11rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  z-index: 1;
}

#measure-hint { color: var(--muted); font-size: 1.1rem; z-index: 1; }

.measure-footer {
  padding: 0 1.25rem calc(env(safe-area-inset-bottom) + 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  align-items: center;
}

#remaining {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  min-height: 1.4em;
}

.progress-track {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--panel);
  overflow: hidden;
}

#progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 3px;
  background: var(--accent);
}

/* ---------- Result ---------- */

#screen-result {
  align-items: center;
  justify-content: center;
  gap: 3rem;
  padding: 1.25rem;
}

.result-center { text-align: center; }

#result-title {
  color: var(--muted);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.result-rate-row { display: flex; align-items: baseline; justify-content: center; gap: 0.6rem; }

#result-rate {
  font-size: clamp(5rem, 30vw, 8rem);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.result-unit { color: var(--muted); font-size: 1.2rem; }

#result-detail { margin-top: 1rem; }

.result-actions {
  display: flex;
  gap: 0.8rem;
  width: 100%;
  max-width: 24rem;
  padding-bottom: calc(env(safe-area-inset-bottom) + 1rem);
}

.btn-primary, .btn-secondary {
  flex: 1;
  padding: 1rem;
  border-radius: 0.9rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.btn-primary { background: var(--accent); color: #06141d; }
.btn-secondary { background: var(--panel); color: var(--text); }