:root {
  --bg: #0b0f14;
  --panel: #121821;
  --panel-2: #1a2230;
  --border: #232c3b;
  --text: #e6edf3;
  --muted: #8b98a9;
  --accent: #22c55e;
  --accent-2: #16a34a;
  --danger: #ef4444;
  --warn: #f59e0b;
  --info: #3b82f6;
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100dvh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.app {
  max-width: 780px;
  margin: 0 auto;
  padding: 16px 16px 96px 16px;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.topbar .brand {
  font-weight: 700;
  letter-spacing: 0.2px;
  font-size: 18px;
  color: var(--text);
}
.topbar .brand .dot { color: var(--accent); }
.topbar .spacer { flex: 1; }
.topbar .user { color: var(--muted); font-size: 13px; }
.topbar button.linklike {
  background: transparent;
  color: var(--muted);
  border: 0;
  padding: 4px 6px;
  cursor: pointer;
}
.topbar button.linklike:hover { color: var(--text); }

.tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 8px 0;
  z-index: 10;
  margin-bottom: 12px;
}
.tabs button {
  background: var(--panel);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 10px 6px;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
}
.tabs button.active {
  color: var(--text);
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(34,197,94,0.12), transparent);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
}
.card h2 {
  margin: 0 0 12px 0;
  font-size: 16px;
  color: var(--text);
}
.card .subtle {
  color: var(--muted);
  font-size: 13px;
}

.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row > .grow { flex: 1; }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; min-width: 0; }
.field label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.4px; }
.field input, .field select, .field textarea {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
  outline: none;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); }
.grid-2, .grid-3, .grid-4 { display: grid; gap: 10px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 520px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}

button.primary, button.secondary, button.danger {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
  font-size: 14px;
}
button.primary { background: var(--accent); color: #0b0f14; }
button.primary:hover { background: var(--accent-2); }
button.secondary { background: var(--panel-2); color: var(--text); border-color: var(--border); }
button.secondary:hover { border-color: var(--accent); }
button.danger { background: transparent; color: var(--danger); border-color: rgba(239,68,68,0.4); }
button.danger:hover { background: rgba(239,68,68,0.08); }

.summary { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
@media (max-width: 520px) { .summary { grid-template-columns: repeat(3, 1fr); } }
.stat {
  background: var(--panel-2);
  border-radius: 10px;
  padding: 10px;
  text-align: center;
  border: 1px solid var(--border);
}
.stat .k { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
.stat .v { font-size: 20px; font-weight: 700; margin-top: 2px; }
.stat .g { color: var(--muted); font-size: 11px; margin-top: 2px; }

.progress {
  height: 6px;
  background: var(--panel-2);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 6px;
}
.progress .bar {
  height: 100%;
  background: var(--accent);
  transition: width 200ms ease;
}
.progress .bar.over { background: var(--warn); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
tbody tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td .del { color: var(--muted); background: transparent; border: 0; cursor: pointer; padding: 4px 6px; }
td .del:hover { color: var(--danger); }

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 14px;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  z-index: 100;
  opacity: 0;
  transition: opacity 200ms ease;
  pointer-events: none;
  max-width: calc(100% - 32px);
}
.toast.show { opacity: 1; }
.toast.error { border-color: rgba(239,68,68,0.5); }

.auth-wrap {
  max-width: 380px;
  margin: 8vh auto 0 auto;
  padding: 16px;
}
.auth-wrap .brand-big {
  text-align: center;
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.auth-wrap .brand-big .dot { color: var(--accent); }
.auth-wrap .tag {
  color: var(--muted);
  text-align: center;
  margin-bottom: 18px;
  font-size: 13px;
}
.auth-wrap .toggle {
  display: flex; gap: 6px; margin-bottom: 12px;
}
.auth-wrap .toggle button {
  flex: 1;
  padding: 10px;
  background: var(--panel);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}
.auth-wrap .toggle button.active { color: var(--text); border-color: var(--accent); }

.pin-input {
  letter-spacing: 8px;
  text-align: center;
  font-size: 22px;
  font-weight: 700;
}

.muted { color: var(--muted); }

/* Day navigation arrows */
button.daynav {
  padding: 8px 12px;
  font-size: 16px;
  line-height: 1;
  min-width: 40px;
}
button.daynav:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* Segmented control (7d / 14d / 30d) */
.seg {
  display: inline-flex;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2px;
  gap: 2px;
}
.seg button {
  background: transparent;
  color: var(--muted);
  border: 0;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
}
.seg button.active {
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 0 0 1px var(--border);
}

/* Trend chart */
.chart-plot {
  position: relative;
  height: 140px;
  padding: 8px 0 22px 0;
}
.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 100%;
  position: relative;
  z-index: 1;
}
.bar-col {
  flex: 1;
  min-width: 0;
  height: 100%;
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: stretch;
  position: relative;
}
.bar-col .bar-fill {
  display: block;
  min-height: 2px;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
  transition: opacity 150ms;
}
.bar-col.empty .bar-fill { background: var(--border); min-height: 2px; opacity: 0.6; }
.bar-col.over .bar-fill { background: var(--warn); }
.bar-col.sel .bar-fill { outline: 2px solid var(--text); outline-offset: 1px; }
.bar-col:hover .bar-fill { opacity: 0.85; }
.bar-col .bar-label {
  position: absolute;
  bottom: -18px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 10px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.bar-col .bar-label.today { color: var(--accent); font-weight: 700; }
.chart-goal {
  position: absolute;
  left: 0;
  right: 0;
  border-top: 1px dashed rgba(230, 237, 243, 0.35);
  z-index: 0;
  pointer-events: none;
}
.chart-goal span {
  position: absolute;
  right: 0;
  top: -16px;
  background: var(--bg);
  color: var(--muted);
  font-size: 10px;
  padding: 0 4px;
  letter-spacing: 0.3px;
}
.chart-legend { margin-top: 8px; font-size: 12px; }
.section-sep { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 12px;
  border: 1px solid var(--border);
}