:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface2: #eef0f7;
  --text: #1b1e28;
  --muted: #6b7186;
  --border: #dfe3ee;
  --accent: #4f46e5;
  --accent-soft: #e6e4fb;
  --green: #15803d;
  --green-soft: #dcf3e3;
  --amber: #b45309;
  --amber-soft: #fdeed3;
  --red: #b91c1c;
  --red-soft: #fde3e3;
  --shadow: 0 1px 3px rgba(20, 24, 40, .08);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141c;
    --surface: #1c1f2b;
    --surface2: #262a3a;
    --text: #e8eaf2;
    --muted: #9aa1b8;
    --border: #333850;
    --accent: #8b85f4;
    --accent-soft: #2c2a52;
    --green: #4ade80;
    --green-soft: #163524;
    --amber: #fbbf24;
    --amber-soft: #3a2c10;
    --red: #f87171;
    --red-soft: #3d1a1a;
    --shadow: 0 1px 3px rgba(0, 0, 0, .4);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding-bottom: calc(70px + env(safe-area-inset-bottom));
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px 10px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  font-size: 22px;
  background: var(--accent);
  color: #fff;
  width: 40px; height: 40px;
  border-radius: 12px;
  display: grid; place-items: center;
}
.brand h1 { margin: 0; font-size: 20px; letter-spacing: 2px; }
.tagline { margin: 0; font-size: 11px; color: var(--muted); letter-spacing: 1px; }

.view { max-width: 640px; margin: 0 auto; padding: 4px 16px 24px; }
.view h2 { font-size: 15px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); margin: 18px 2px 10px; }
.hint { color: var(--muted); font-size: 13px; margin: 4px 2px 12px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  margin-bottom: 12px;
}
.card .row { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.card h3 { margin: 0 0 2px; font-size: 17px; }
.meta { color: var(--muted); font-size: 13px; margin: 0; }
.notes { font-size: 14px; margin: 8px 0 0; white-space: pre-wrap; }
.rationale { font-size: 13px; color: var(--muted); font-style: italic; margin: 8px 0 0; }

.badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.badge.high  { background: var(--green-soft); color: var(--green); }
.badge.low   { background: var(--amber-soft); color: var(--amber); }
.badge.plain { background: var(--surface2); color: var(--muted); font-weight: 600; }
.badge.signal { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

.btn {
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 14px;
  cursor: pointer;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--red); }
.btn.small { font-size: 13px; padding: 5px 10px; }
.btn:disabled { opacity: .5; cursor: wait; }
.btn:active { transform: translateY(1px); }

form.stack, .stack { display: flex; flex-direction: column; gap: 10px; }
input[type=text], input[type=password], input[type=number], input[type=datetime-local], textarea, select {
  font: inherit;
  font-size: 15px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
}
textarea { min-height: 90px; resize: vertical; }
label { font-size: 13px; font-weight: 600; color: var(--muted); }
label > input, label > select, label > textarea { margin-top: 4px; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grid2 > *, .track-row > input { min-width: 0; }
@media (max-width: 480px) { .grid2 { grid-template-columns: 1fr; } }

.track-row { display: flex; gap: 8px; align-items: center; }
.track-row input[type=text] { flex: 1; }
.track-row input[type=number] { width: 84px; }

.banner {
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 600;
  margin-top: 10px;
}
.followup-box, .msg-box {
  background: var(--surface2);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  white-space: pre-wrap;
  margin-top: 10px;
}

.signal-log { margin-top: 10px; font-size: 13px; }
.signal-log li { margin-bottom: 4px; }
.signal-input { display: flex; gap: 8px; margin-top: 10px; }
.signal-input input { flex: 1; }

.empty {
  text-align: center;
  color: var(--muted);
  padding: 40px 20px;
  font-size: 14px;
}
.empty .big { font-size: 34px; display: block; margin-bottom: 8px; }

.tabs {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: flex;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom);
  z-index: 10;
}
.tabs button {
  flex: 1;
  font: inherit;
  font-size: 12.5px;
  font-weight: 600;
  padding: 12px 2px;
  border: none;
  background: none;
  color: var(--muted);
  cursor: pointer;
  position: relative;
}
.tabs button.active { color: var(--accent); }
.count {
  display: inline-block;
  min-width: 17px;
  font-size: 10.5px;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: 0 4px;
  margin-left: 2px;
}
.count:empty { display: none; }

.toast {
  position: fixed;
  bottom: calc(78px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
  z-index: 20;
  max-width: 90vw;
  text-align: center;
}
.toast.error { background: var(--red); color: #fff; }
.hidden { display: none !important; }

.next-meetup { font-size: 15px; font-weight: 700; color: var(--accent); margin-top: 6px; }
.divider { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

.header-actions { display: flex; gap: 8px; align-items: center; }
.mixer-toggle.on {
  background: var(--green-soft);
  border-color: var(--green);
  color: var(--green);
  animation: mixerpulse 2s ease-in-out infinite;
}
@keyframes mixerpulse { 50% { box-shadow: 0 0 0 5px color-mix(in srgb, var(--green) 18%, transparent); } }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chip {
  font: inherit; font-size: 14px; font-weight: 700;
  width: 38px; height: 34px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface2);
  color: var(--text);
  cursor: pointer;
}
.chip:nth-child(n+7) { border-color: var(--green); color: var(--green); }
.chip:active { transform: scale(.94); }
.chip:disabled { opacity: .4; }

.mixer-card { border-left: 4px solid var(--green); }
.due-row { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.due-row:last-child { border-bottom: none; }
.due-time { font-weight: 700; color: var(--accent); white-space: nowrap; }
.due-row.overdue .due-time { color: var(--red); }