:root {
  --bg: #0a0a0a;
  --bg-elev: #161616;
  --bg-elev2: #222;
  --fg: #f5f5f5;
  --fg-dim: #999;
  --fg-faint: #555;
  --accent: #4ea3ff;
  --accent-dim: #2a6db5;
  --ok: #5fb55f;
  --warn: #e0a020;
  --bad: #d04848;
  --border: #2a2a2a;
  --radius: 10px;
  --radius-sm: 6px;
  --pad: 16px;
  --gap: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior-y: none;
}
body {
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
#app { max-width: 720px; margin: 0 auto; padding: var(--pad); padding-bottom: 100px; }
h1, h2, h3 { margin: 0 0 12px; font-weight: 600; }
h1 { font-size: 22px; }
h2 { font-size: 18px; color: var(--fg); }
h3 { font-size: 15px; color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.5px; }
p { line-height: 1.5; color: var(--fg); margin: 0 0 10px; }
small, .small { font-size: 12px; color: var(--fg-dim); }
.dim { color: var(--fg-dim); }
.faint { color: var(--fg-faint); }
.ok { color: var(--ok); }
.warn { color: var(--warn); }
.bad { color: var(--bad); }
.center { text-align: center; }
.row { display: flex; gap: var(--gap); align-items: center; }
.row.wrap { flex-wrap: wrap; }
.col { display: flex; flex-direction: column; gap: var(--gap); }
.spacer { flex: 1; }
.grow { flex: 1; }
hr { border: 0; border-top: 1px solid var(--border); margin: 16px 0; }

button, .btn {
  background: var(--bg-elev); color: var(--fg);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 16px; font-size: 15px;
  cursor: pointer; transition: background 0.15s, border-color 0.15s;
  font-family: inherit; min-height: 44px; text-align: center;
}
button:hover, .btn:hover { background: var(--bg-elev2); }
button:disabled, .btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-dim); border-color: var(--accent-dim); }
.btn-danger { background: var(--bad); color: #fff; border-color: var(--bad); }
.btn-ghost { background: transparent; border-color: var(--border); }
.btn-sm { padding: 6px 10px; font-size: 13px; min-height: 32px; }

input, select, textarea {
  background: var(--bg-elev); color: var(--fg);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 12px; font-size: 15px; font-family: inherit;
  width: 100%;
}
textarea { resize: vertical; min-height: 80px; }
label { display: block; margin: 0 0 6px; font-size: 13px; color: var(--fg-dim); }
.field { margin-bottom: 14px; }

.card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: var(--pad);
  margin-bottom: var(--gap);
}
.card-tight { padding: 12px; }
.tag {
  display: inline-block; font-size: 11px; padding: 2px 8px;
  background: var(--bg-elev2); border-radius: 999px; color: var(--fg-dim);
  letter-spacing: 0.3px;
}
.tag.evidence-strong { background: rgba(95, 181, 95, 0.18); color: var(--ok); }
.tag.evidence-mod    { background: rgba(224, 160, 32, 0.18); color: var(--warn); }
.tag.evidence-weak   { background: rgba(208, 72, 72, 0.18); color: var(--bad); }
.tag.priority-high   { background: rgba(208, 72, 72, 0.18); color: var(--bad); }
.tag.priority-med    { background: rgba(224, 160, 32, 0.18); color: var(--warn); }
.tag.priority-low    { background: rgba(95, 181, 95, 0.18); color: var(--ok); }

nav.bottom {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--bg-elev); border-top: 1px solid var(--border);
  display: flex; justify-content: space-around;
  padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
  z-index: 50;
}
nav.bottom button {
  flex: 1; background: transparent; border: none; padding: 8px 4px;
  color: var(--fg-dim); font-size: 11px; min-height: auto;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
}
nav.bottom button.active { color: var(--accent); }
nav.bottom .icn { font-size: 20px; line-height: 1; }

.inbox-badge {
  position: absolute; top: 12px; right: 12px;
  background: var(--accent); color: #fff;
  border-radius: 999px; padding: 4px 10px;
  font-size: 12px; font-weight: 600;
}
.inbox-badge[data-count="0"] { display: none; }

/* Photo capture */
.cap-wrap { position: relative; max-width: 100%; }
#cap-video, #cap-canvas { width: 100%; border-radius: var(--radius); background: #000; display: block; }
.cap-overlay {
  position: absolute; inset: 0; pointer-events: none;
  display: flex; align-items: center; justify-content: center;
}
.cap-frame-box {
  width: 60%; height: 80%; border: 2px dashed rgba(255,255,255,0.4); border-radius: 8px;
}
.cap-ghost { position: absolute; inset: 0; opacity: 0.3; pointer-events: none; object-fit: cover; width: 100%; height: 100%; }
.cap-status { padding: 10px; background: var(--bg-elev); border-radius: var(--radius); margin: 10px 0; }
.cap-status .gate { display: flex; gap: 8px; align-items: center; font-size: 13px; }
.cap-status .gate.pass { color: var(--ok); }
.cap-status .gate.fail { color: var(--bad); }

/* Habit heatmap */
.heatmap { display: grid; grid-template-columns: repeat(15, 1fr); gap: 3px; margin: 12px 0; }
.heatmap .cell { aspect-ratio: 1; border-radius: 2px; background: var(--bg-elev2); }
.heatmap .cell.l1 { background: rgba(78, 163, 255, 0.25); }
.heatmap .cell.l2 { background: rgba(78, 163, 255, 0.5); }
.heatmap .cell.l3 { background: rgba(78, 163, 255, 0.75); }
.heatmap .cell.l4 { background: var(--accent); }

/* Lists */
.list-item { padding: 12px; border-bottom: 1px solid var(--border); }
.list-item:last-child { border-bottom: none; }
.list-item .meta { font-size: 12px; color: var(--fg-dim); margin-top: 4px; }
.list-item .actions { display: flex; gap: 6px; margin-top: 8px; }

/* Modal */
.modal-bg {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7); z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.modal {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  max-width: 500px; width: 100%; max-height: 90vh; overflow-y: auto;
}

/* Disclaimer scroll-to-bottom */
.disclaimer-scroll {
  max-height: 60vh; overflow-y: auto; padding: 16px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elev); margin-bottom: 12px;
}

/* Charts */
.chart-mini { height: 120px; position: relative; margin-top: 8px; }
.chart-full { height: 280px; position: relative; }

/* Wellness gate banner */
.banner {
  padding: 12px; border-radius: var(--radius); margin: 10px 0;
  border: 1px solid var(--border);
}
.banner.warn { background: rgba(224, 160, 32, 0.1); border-color: var(--warn); color: var(--warn); }
.banner.bad  { background: rgba(208, 72, 72, 0.1);  border-color: var(--bad);  color: var(--bad);  }
.banner.info { background: rgba(78, 163, 255, 0.1); border-color: var(--accent); color: var(--accent); }

/* Onboarding steps */
.step-indicator { display: flex; gap: 6px; margin-bottom: 16px; }
.step-indicator .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }
.step-indicator .dot.active { background: var(--accent); }

/* Photo gallery thumbs */
.thumb-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.thumb-grid img { width: 100%; aspect-ratio: 3/4; object-fit: cover; border-radius: var(--radius-sm); }

/* Compare slider */
.compare-wrap { position: relative; overflow: hidden; border-radius: var(--radius); }
.compare-wrap img { width: 100%; display: block; }
.compare-wrap .top { position: absolute; top: 0; left: 0; clip-path: inset(0 50% 0 0); }
.compare-slider { width: 100%; margin-top: 8px; }