:root {
  --bg: #10141c;
  --surface: #171c26;
  --surface-2: #1d2330;
  --border: #262d3a;
  --text: #edeff4;
  --muted: #8b93a7;

  --caffeine: #e8a33d;
  --caffeine-soft: rgba(232, 163, 61, 0.16);
  --adderall: #8b7fe8;
  --adderall-soft: rgba(139, 127, 232, 0.16);
  --xanax: #e8748c;
  --xanax-soft: rgba(232, 116, 140, 0.16);
  --sleep: #4fb6c4;
  --sleep-soft: rgba(79, 182, 196, 0.16);

  --radius: 14px;
  --font-ui: 'Manrope', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }

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

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: conic-gradient(from 200deg, var(--caffeine), var(--adderall), var(--xanax), var(--sleep), var(--caffeine));
  flex-shrink: 0;
}
.brand h1 { font-size: 20px; margin: 0; font-weight: 800; letter-spacing: -0.02em; }
.brand-sub { margin: 0; font-size: 12px; color: var(--muted); }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.live-clock { font-family: var(--font-mono); color: var(--muted); font-size: 13px; }

.btn {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  padding: 9px 16px;
  cursor: pointer;
  transition: transform 0.1s ease, border-color 0.15s ease;
}
.btn:hover { border-color: #3a4356; }
.btn:active { transform: scale(0.97); }
.btn-ghost { background: transparent; }

/* ---------- Panels ---------- */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 18px;
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 10px;
}
.panel-head h2 { font-size: 15px; margin: 0; font-weight: 700; }
.panel-sub { font-size: 12px; color: var(--muted); font-family: var(--font-mono); }

/* ---------- Rhythm strip (signature element) ---------- */
.rhythm-strip {
  position: relative;
  height: 64px;
  border-radius: 10px;
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  overflow: hidden;
}
.rhythm-hour-tick {
  position: absolute; top: 0; bottom: 0; width: 1px; background: rgba(255,255,255,0.05);
}
.rhythm-hour-label {
  position: absolute; bottom: 3px; font-size: 9px; color: var(--muted); font-family: var(--font-mono);
  transform: translateX(-50%);
}
.rhythm-sleep-band {
  position: absolute; top: 0; bottom: 0; background: var(--sleep-soft);
  border-left: 1px solid var(--sleep); border-right: 1px solid var(--sleep);
}
.rhythm-dot {
  position: absolute; top: 8px; width: 10px; height: 10px; border-radius: 50%;
  transform: translateX(-50%);
  border: 2px solid var(--bg);
}
.rhythm-legend {
  display: flex; gap: 16px; margin-top: 10px; font-size: 12px; color: var(--muted); flex-wrap: wrap;
}
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 5px; }
.dot-caffeine { background: var(--caffeine); }
.dot-adderall { background: var(--adderall); }
.dot-xanax { background: var(--xanax); }
.dot-sleep { background: var(--sleep); }

/* ---------- Grid / cards ---------- */
.grid { display: grid; gap: 14px; margin-bottom: 18px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 3px solid transparent;
}
.card h3 { margin: 0 0 4px; font-size: 14px; font-weight: 700; }
.card-caffeine { border-top-color: var(--caffeine); }
.card-adderall { border-top-color: var(--adderall); }
.card-xanax { border-top-color: var(--xanax); }
.card-sleep { border-top-color: var(--sleep); }

.amount-row { display: flex; align-items: baseline; gap: 6px; }
.amount-row input[type="number"] {
  width: 100%; font-family: var(--font-mono); font-size: 22px; font-weight: 600;
  background: transparent; border: none; color: var(--text); padding: 2px 0;
}
.amount-row input[type="number"]:focus { outline: none; }
.unit { color: var(--muted); font-size: 12px; }

input[type="range"] { width: 100%; accent-color: var(--muted); }
.card-caffeine input[type="range"] { accent-color: var(--caffeine); }
.card-adderall input[type="range"] { accent-color: var(--adderall); }
.card-xanax input[type="range"] { accent-color: var(--xanax); }

.mini-label { font-size: 11px; color: var(--muted); margin-top: 4px; }
.hint { font-weight: 400; }

input[type="date"], input#hoursSleptOverride {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); padding: 8px 10px; font-family: var(--font-mono); font-size: 13px;
}

.time-picker { display: flex; gap: 6px; align-items: center; }
.time-picker select {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); padding: 7px 8px; font-family: var(--font-mono); font-size: 13px;
}

.btn-log {
  margin-top: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.card-caffeine .btn-log:hover { border-color: var(--caffeine); color: var(--caffeine); }
.card-adderall .btn-log:hover { border-color: var(--adderall); color: var(--adderall); }
.card-xanax .btn-log:hover { border-color: var(--xanax); color: var(--xanax); }
.card-sleep .btn-log:hover { border-color: var(--sleep); color: var(--sleep); }

.form-msg { font-size: 12px; min-height: 14px; margin: 0; }
.form-msg.ok { color: var(--sleep); }
.form-msg.err { color: var(--xanax); }

/* ---------- Range toggle ---------- */
.range-toggle { display: flex; gap: 4px; background: var(--surface-2); padding: 3px; border-radius: 999px; }
.range-toggle button {
  border: none; background: transparent; color: var(--muted); font-family: var(--font-ui);
  font-size: 12px; font-weight: 600; padding: 6px 12px; border-radius: 999px; cursor: pointer;
}
.range-toggle button.active { background: var(--surface); color: var(--text); }

/* ---------- Stats ---------- */
.stats-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
@media (max-width: 900px) { .stats-row { grid-template-columns: repeat(2, 1fr); } }
.stat {
  background: var(--surface-2); border-radius: 10px; padding: 14px; text-align: center;
  border-bottom: 3px solid var(--border);
}
.stat-caffeine { border-bottom-color: var(--caffeine); }
.stat-adderall { border-bottom-color: var(--adderall); }
.stat-xanax { border-bottom-color: var(--xanax); }
.stat-sleep { border-bottom-color: var(--sleep); }
.stat-corr { border-bottom-color: var(--muted); }
.stat-value { display: block; font-family: var(--font-mono); font-size: 22px; font-weight: 600; }
.stat-label { display: block; font-size: 11px; color: var(--muted); margin-top: 4px; }

/* ---------- Charts ---------- */
.chart-holder { height: 280px; }

/* ---------- Recent activity ---------- */
.recent-list { display: flex; flex-direction: column; gap: 6px; max-height: 320px; overflow-y: auto; }
.recent-row {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface-2); border-radius: 8px; padding: 9px 12px; font-size: 13px;
}
.recent-left { display: flex; align-items: center; gap: 10px; }
.recent-row .dot { width: 9px; height: 9px; }
.recent-time { color: var(--muted); font-family: var(--font-mono); font-size: 12px; }
.recent-del {
  border: none; background: transparent; color: var(--muted); cursor: pointer; font-size: 16px;
  line-height: 1; padding: 4px 6px; border-radius: 6px;
}
.recent-del:hover { color: var(--xanax); background: rgba(232,116,140,0.1); }

.footer-note { text-align: center; color: var(--muted); font-size: 12px; margin-top: 20px; }

/* ---------- Login overlay ---------- */
.login-overlay {
  position: fixed; inset: 0; background: rgba(16,20,28,0.92);
  display: flex; align-items: center; justify-content: center; z-index: 100;
  backdrop-filter: blur(3px);
}
.login-overlay[hidden] { display: none; }
.app-hidden { display: none; }

/* ---------- Login (unused standalone variant, kept for reference) ---------- */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; width: 280px; text-align: center;
}
.login-card h1 { margin: 0 0 4px; }
.login-sub { color: var(--muted); font-size: 13px; margin: 0 0 16px; }
.login-card input {
  width: 100%; padding: 10px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text); margin-bottom: 12px; font-family: var(--font-ui);
}
.login-error { color: var(--xanax); font-size: 12px; }