:root {
  --bg: #f4f8fa;
  --surface: #ffffff;
  --surface-sunken: #e9f2f6;
  --text: #12232c;
  --text-muted: #5b7079;
  --primary: #0092ca;
  --primary-deep: #00688f;
  --primary-tint: #dcf0f8;
  --accent: #ee7d3b;
  --accent-tint: #fce8db;
  --border: #d8e6ec;
  --danger: #c14a3f;
  --radius: 14px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1a21;
    --surface: #122631;
    --surface-sunken: #17313e;
    --text: #eaf3f7;
    --text-muted: #92aab4;
    --primary: #3fb4e0;
    --primary-deep: #7ecdea;
    --primary-tint: #163444;
    --accent: #f3a06a;
    --accent-tint: #33261a;
    --border: #23414f;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--primary); }

.app-shell {
  max-width: 480px;
  margin: 0 auto;
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.topbar {
  padding: 20px 20px 12px;
}

.topbar .eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 600;
}

.topbar h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 4px 0 0;
  text-wrap: balance;
}

.screen {
  flex: 1;
  padding: 4px 20px 96px;
  overflow-y: auto;
}

.screen[hidden] { display: none !important; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 14px;
}

.card h2, .card h3 {
  font-family: var(--font-display);
  margin: 0 0 8px;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}

.stat-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.stat-tile .label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-tile .value {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}

.stat-tile .value.positive { color: var(--danger); }
.stat-tile .value.negative { color: var(--primary); }

.pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--primary-tint);
  color: var(--primary-deep);
  font-size: 0.75rem;
  font-weight: 600;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: 10px;
  padding: 11px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  background: var(--primary);
  color: white;
  width: 100%;
}

.btn:active { transform: translateY(1px); }
.btn.secondary { background: var(--surface-sunken); color: var(--text); }
.btn.accent { background: var(--accent); }

.suggestion-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 10px 0 4px;
}

.suggestion-chip {
  background: var(--primary-tint);
  color: var(--primary-deep);
  border: none;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 0.82rem;
  cursor: pointer;
  font-family: var(--font-body);
}

/* Coach chat */
#chatLog {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 4px 0 14px;
}

.msg {
  max-width: 82%;
  padding: 10px 13px;
  border-radius: 14px;
  white-space: pre-wrap;
  line-height: 1.4;
  font-size: 0.94rem;
}

.msg.user {
  align-self: flex-end;
  background: var(--primary);
  color: white;
  border-bottom-right-radius: 4px;
}

.msg.assistant {
  align-self: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.chat-input-row {
  position: fixed;
  bottom: 66px;
  left: 0; right: 0;
  max-width: 480px;
  margin: 0 auto;
  padding: 10px 14px;
  background: var(--bg);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}

.chat-input-row input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 12px;
  font-size: 0.95rem;
  background: var(--surface);
  color: var(--text);
}

.chat-input-row button {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 0 16px;
  font-weight: 600;
  cursor: pointer;
}

.badge-live {
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Forms */
.field { margin-bottom: 12px; }
.field label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.field input, .field select, .field textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 11px;
  font-size: 0.95rem;
  font-family: var(--font-body);
  background: var(--surface);
  color: var(--text);
}
.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  background: var(--surface-sunken);
  border-radius: 10px;
  padding: 4px;
}
.tab-btn {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 4px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-body);
}
.tab-btn.active { background: var(--surface); color: var(--primary); }

.log-item {
  display: flex;
  justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.log-item:last-child { border-bottom: none; }
.log-item .meta { color: var(--text-muted); font-size: 0.78rem; }

/* Bottom nav */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  max-width: 480px;
  margin: 0 auto;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  height: 66px;
}
.nav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-family: var(--font-body);
  cursor: pointer;
}
.nav-btn .icon { font-size: 1.25rem; }
.nav-btn.active { color: var(--primary); font-weight: 700; }

.photo-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.photo-gallery .photo-tile {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface-sunken);
  border: 1px solid var(--border);
}
.photo-gallery .photo-tile img { width: 100%; height: 100%; object-fit: cover; display: block; }
.photo-gallery .photo-tile .tag {
  position: absolute; bottom: 4px; left: 4px;
  background: rgba(0,0,0,0.55); color: #fff;
  font-size: 0.62rem; padding: 1px 6px; border-radius: 999px;
}

.chart-wrap { width: 100%; }
.chart-wrap svg { width: 100%; height: auto; display: block; }

.center-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
}