/* AI Healthier Every Day — design system
 * Teal = healthcare trust; amber reserved for streak/timer energy.
 * No framework, no build step — served as-is by FastAPI StaticFiles.
 */
:root {
  --teal-700: #0f766e;
  --teal-600: #0d9488;
  --teal-100: #ccfbf1;
  --teal-50: #f0fdfa;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #f6f8f8;
  --card: #ffffff;
  --amber: #d97706;
  --amber-100: #fef3c7;
  --red: #b91c1c;
  --red-50: #fef2f2;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(16, 42, 40, 0.06), 0 4px 14px rgba(16, 42, 40, 0.06);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}
main { max-width: 880px; margin: 0 auto; padding: 16px 16px 32px; }
h1, h2 { margin: 0; line-height: 1.25; }
h2 { font-size: 1.05rem; }
p { margin: 0.35em 0; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 0.82rem; }

/* ---------- top bar ---------- */
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  padding: 10px 16px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo { width: 34px; height: 34px; color: var(--teal-700); flex: none; }
.brand h1 { font-size: 1.1rem; letter-spacing: -0.01em; }
.tagline { margin: 0; font-size: 0.8rem; color: var(--muted); }
.top-actions { display: flex; align-items: center; gap: 10px; }
.ai-status {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.78rem; color: var(--muted);
  background: var(--bg); border: 1px solid var(--line);
  padding: 3px 10px; border-radius: 999px;
}
.ai-status .dot { width: 8px; height: 8px; border-radius: 50%; background: #9ca3af; }
.ai-status.live .dot { background: #059669; box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.15); }
.ai-status.fallback .dot { background: var(--amber); box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15); }

/* ---------- tabs ---------- */
.tabs {
  max-width: 880px; margin: 10px auto 0; padding: 0 16px;
  display: flex; gap: 8px;
}
.tab {
  flex: 1; border: 1px solid var(--line); background: var(--card);
  padding: 9px 6px; border-radius: 999px; cursor: pointer;
  font-size: 0.9rem; color: var(--muted); transition: all 0.15s;
}
.tab.active { background: var(--teal-700); border-color: var(--teal-700); color: #fff; font-weight: 600; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- cards ---------- */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 16px; margin-top: 14px;
}
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.hero-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 0 14px; }
@media (max-width: 640px) { .hero-grid { grid-template-columns: 1fr; } }
.greeting { font-size: 1.35rem; font-weight: 700; margin: 0; }
.date-line { color: var(--muted); font-size: 0.9rem; }

/* ---------- buttons ---------- */
.primary-btn, .secondary-btn, .ghost-btn {
  border-radius: 10px; cursor: pointer; font-size: 0.92rem;
  padding: 9px 16px; transition: filter 0.15s;
}
.primary-btn { background: var(--teal-700); color: #fff; border: none; font-weight: 600; }
.primary-btn:hover { filter: brightness(1.08); }
.secondary-btn { background: var(--teal-50); color: var(--teal-700); border: 1px solid var(--teal-100); }
.ghost-btn { background: transparent; border: 1px solid var(--line); color: var(--muted); }
.ghost-btn:hover { color: var(--ink); }
.row-btns { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }

/* ---------- streak ring ---------- */
.streak-card { display: flex; flex-direction: column; align-items: center; justify-content: center; }
.streak-ring { width: 110px; height: 110px; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--line); stroke-width: 10; }
.ring-fg {
  fill: none; stroke: var(--teal-600); stroke-width: 10; stroke-linecap: round;
  stroke-dasharray: 326.7; stroke-dashoffset: 326.7;
  transition: stroke-dashoffset 0.6s ease;
}
.ring-fg.amber { stroke: var(--amber); }
.streak-ring text { font-size: 30px; font-weight: 700; fill: var(--ink); transform: rotate(90deg); transform-origin: 60px 60px; }
.streak-label { color: var(--muted); font-size: 0.85rem; }

/* ---------- lists / chips / grid ---------- */
.item-list { display: flex; flex-direction: column; gap: 8px; }
.item-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px;
}
.item-row .name { font-weight: 600; font-size: 0.95rem; }
.item-row .meta { color: var(--muted); font-size: 0.8rem; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.chip {
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  border-radius: 999px; padding: 5px 12px; font-size: 0.82rem; cursor: pointer;
}
.chip.active { background: var(--teal-100); border-color: var(--teal-600); color: var(--teal-700); font-weight: 600; }
.ex-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }
.ex-card {
  border: 1px solid var(--line); border-radius: 12px; padding: 12px;
  display: flex; flex-direction: column; gap: 6px; cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s; text-align: left; background: var(--card);
}
.ex-card:hover { border-color: var(--teal-600); box-shadow: var(--shadow); }
.ex-card .ex-name { font-weight: 700; font-size: 0.95rem; }
.ex-card .ex-meta { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  font-size: 0.7rem; padding: 2px 8px; border-radius: 999px;
  background: var(--teal-50); color: var(--teal-700); border: 1px solid var(--teal-100);
}
.badge.warn { background: var(--amber-100); color: var(--amber); border-color: #fde68a; }
.ex-card .ex-purpose { color: var(--muted); font-size: 0.82rem; }

/* ---------- safety / tips ---------- */
.safety-box {
  background: var(--amber-100); border: 1px solid #fde68a; color: #78350f;
  border-radius: 12px; padding: 10px 12px; font-size: 0.85rem; margin: 10px 0;
}
.safety-box:empty { display: none; }
.tip-text { font-size: 1.02rem; }
.plan-note { margin-top: 10px; }

/* ---------- training stage ---------- */
.stage-wrap {
  position: relative; border-radius: 12px; overflow: hidden;
  background: #0b1512; aspect-ratio: 4 / 3; max-height: 60vh; margin-top: 10px;
}
.stage-wrap video, .stage-wrap canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; transform: scaleX(-1);
}
.hud {
  position: absolute; left: 12px; right: 12px; bottom: 12px;
  display: flex; align-items: flex-end; justify-content: space-between; gap: 10px;
  pointer-events: none;
}
.hud-reps {
  background: rgba(15, 118, 110, 0.88); color: #fff; border-radius: 14px;
  padding: 6px 14px; font-size: 1.7rem; font-weight: 800; line-height: 1;
  display: flex; flex-direction: column; align-items: center;
}
.hud-reps small { font-size: 0.68rem; font-weight: 400; opacity: 0.85; }
.hud-cue {
  background: rgba(255, 255, 255, 0.92); color: var(--ink);
  border-radius: 10px; padding: 6px 12px; font-size: 0.85rem; max-width: 70%;
}
.privacy-note { margin-top: 8px; }
.timer-ring-wrap { display: flex; flex-direction: column; align-items: center; padding: 8px 0; }
.timer-ring { width: 150px; height: 150px; transform: rotate(-90deg); }
.timer-ring text { font-size: 26px; font-weight: 700; fill: var(--ink); transform: rotate(90deg); transform-origin: 60px 60px; }
.timer-cue { margin-top: 10px; font-size: 1.05rem; font-weight: 600; color: var(--teal-700); text-align: center; min-height: 1.6em; }

/* ---------- summary ---------- */
.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 10px; margin: 10px 0; }
.summary-grid .s { border: 1px solid var(--line); border-radius: 12px; padding: 10px; text-align: center; }
.summary-grid .s b { font-size: 1.3rem; display: block; }
.summary-grid .s span { color: var(--muted); font-size: 0.78rem; }

/* ---------- chat ---------- */
.chat-card { display: flex; flex-direction: column; }
.chat-log { display: flex; flex-direction: column; gap: 10px; max-height: 46vh; overflow-y: auto; padding: 4px 2px; }
.msg { max-width: 85%; border-radius: 14px; padding: 9px 12px; font-size: 0.93rem; white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--teal-700); color: #fff; border-bottom-right-radius: 4px; }
.msg.bot { align-self: flex-start; background: var(--bg); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg .msg-meta { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.msg .src { font-size: 0.7rem; color: var(--muted); }
.badge.agent { background: var(--teal-100); color: var(--teal-700); }
.badge.template { background: #f3f4f6; color: var(--muted); }
.badge.tool { background: #eef2ff; color: #4338ca; border-color: #e0e7ff; }
.safety-banner {
  background: var(--red-50); border: 1px solid #fecaca; color: var(--red);
  border-radius: 12px; padding: 10px 12px; font-size: 0.88rem; margin: 4px 0;
}
.chat-input-row { display: flex; gap: 8px; margin-top: 10px; }
.chat-input-row input {
  flex: 1; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; font-size: 0.95rem; outline: none;
}
.chat-input-row input:focus { border-color: var(--teal-600); }

/* ---------- progress ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 0 14px; }
.stat { text-align: center; }
.stat-num { font-size: 1.7rem; font-weight: 800; display: block; color: var(--teal-700); }
.stat-label { color: var(--muted); font-size: 0.8rem; }
#chart { width: 100%; }
#history-list .item-row .when { color: var(--muted); font-size: 0.78rem; }

/* ---------- footer ---------- */
footer {
  max-width: 880px; margin: 8px auto 28px; padding: 0 16px;
  color: var(--muted); font-size: 0.8rem;
}