:root {
  --bg: #0b0f14;
  --surface: #141b22;
  --surface-2: #1b242c;
  --border: #2a3540;
  --text: #eef2f5;
  --text-dim: #9fb0bd;
  --accent: #14b8a6;
  --accent-dim: #0f766e;
  --danger: #f87171;
  --warn: #fbbf24;
  --radius: 14px;
  --gap: 12px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f7f8;
    --surface: #ffffff;
    --surface-2: #eef2f4;
    --border: #dde3e7;
    --text: #101418;
    --text-dim: #5b6a75;
    --accent: #0f766e;
    --accent-dim: #14b8a6;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  padding-bottom: 76px; /* space for bottom nav */
  min-height: 100vh;
}

.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
}

header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  padding-top: max(16px, env(safe-area-inset-top));
  max-width: 480px;
  margin: 0 auto;
}

header.topbar h1 {
  font-size: 17px;
  font-weight: 600;
  margin: 0;
}

.refresh-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 20px;
  line-height: 1;
  padding: 6px;
  cursor: pointer;
}

.refresh-btn.spinning {
  animation: spin 0.6s linear infinite;
  color: var(--accent);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: var(--gap);
}

.hero {
  text-align: center;
  padding: 24px 16px;
}

.hero .label {
  font-size: 13px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero .value {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  margin: 8px 0 4px;
}

.hero .value.negative { color: var(--danger); }

.hero .sub {
  font-size: 13px;
  color: var(--text-dim);
}

.tier-row {
  display: flex;
  justify-content: space-between;
  gap: var(--gap);
}

.tier {
  flex: 1;
  text-align: center;
  padding: 10px;
  border-radius: 10px;
  background: var(--surface-2);
}

.tier .tier-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tier .tier-value {
  font-size: 18px;
  font-weight: 600;
  margin-top: 2px;
}

.tier.estimate .tier-value { opacity: 0.85; font-weight: 500; }

.staleness {
  display: flex;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
  justify-content: center;
  margin-top: 10px;
  flex-wrap: wrap;
}

.staleness .dot { color: var(--accent); }

.breakdown {
  display: flex;
  justify-content: space-around;
  text-align: center;
}

.breakdown .item .num { font-size: 20px; font-weight: 600; }
.breakdown .item .lbl { font-size: 12px; color: var(--text-dim); }

.section-title {
  font-size: 13px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 20px 0 8px 4px;
}

.shortcut-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.shortcut-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  text-align: left;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.15s ease;
}

.shortcut-btn:active { transform: scale(0.97); background: var(--surface-2); }

.shortcut-btn .kcal {
  display: block;
  font-size: 12px;
  color: var(--accent);
  margin-top: 4px;
}

.log-box {
  display: flex;
  gap: 8px;
}

.log-box input[type="text"] {
  flex: 1;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 16px; /* iOS Safari auto-zooms focused inputs under 16px */
}

button {
  font-family: inherit;
}

.btn {
  padding: 12px 16px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #062420;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}

.btn.secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn.danger { background: var(--danger); color: #200606; }
.btn:disabled { opacity: 0.5; cursor: default; }

.log-list .entry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  gap: 8px;
}
.log-list .entry:last-child { border-bottom: none; }
.log-list .entry .desc { flex: 1; }
.log-list .entry .desc .time { font-size: 11px; color: var(--text-dim); display: block; }
.log-list .entry .kcal { font-weight: 600; white-space: nowrap; }
.log-list .entry .del {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 16px;
  padding: 4px 6px;
}

.candidate-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--surface-2);
  border: 1px solid var(--accent-dim);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: var(--gap);
  font-size: 14px;
}
.candidate-banner .actions { display: flex; gap: 6px; }
.candidate-banner .actions button { padding: 6px 10px; font-size: 13px; }

nav.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 8px 0 max(8px, env(safe-area-inset-bottom));
}

nav.bottom-nav a {
  flex: 1;
  text-align: center;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 12px;
  padding: 6px 0;
}

nav.bottom-nav a.active { color: var(--accent); font-weight: 600; }

.field {
  margin-bottom: 16px;
}
.field label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.field input[type="number"],
.field input[type="text"],
.field input[type="time"],
.field input[type="password"],
.field select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 16px; /* iOS Safari auto-zooms focused inputs under 16px */
}

.time-list { display: flex; flex-direction: column; gap: 8px; }
.time-list .row { display: flex; gap: 8px; align-items: center; }
.time-list .row input { flex: 1; }

.toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 20px;
  max-width: 380px;
  width: 100%;
}

.modal h2 { margin: 0 0 10px; font-size: 17px; }
.modal p { color: var(--text-dim); font-size: 14px; }

.install-banner {
  background: var(--surface-2);
  border: 1px solid var(--accent-dim);
  border-radius: 12px;
  padding: 12px;
  font-size: 13px;
  margin-bottom: var(--gap);
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}
.install-banner button {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
}

.error-text { color: var(--danger); font-size: 13px; margin-top: 6px; }

canvas#weight-chart {
  width: 100%;
  height: 260px;
  display: block;
}

.legend {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.legend .swatch { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; vertical-align: middle; }