:root {
  --glass-bg: rgba(255,255,255,0.06);
  --glass-bg-strong: rgba(255,255,255,0.11);
  --glass-border: rgba(255,255,255,0.12);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.40);
  --ink: #e2e8f0;
  --ink-dim: rgba(226,232,240,0.62);
  --ink-faint: rgba(226,232,240,0.40);
  --accent: #38bdf8;
  --accent-2: #67e8f9;
  --accent-3: #3b82f6;
}

body {
  font-family: 'Inter', sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 18%, rgba(56,189,248,0.18), transparent 45%),
    radial-gradient(circle at 88% 12%, rgba(103,232,249,0.12), transparent 42%),
    radial-gradient(circle at 55% 95%, rgba(59,130,246,0.16), transparent 45%),
    linear-gradient(160deg, #0b1120 0%, #0f172a 55%, #05070d 100%);
  background-attachment: fixed;
}

h1, h2, h3, .display-font {
  font-family: 'Space Grotesk', sans-serif;
}

a {
  color: var(--accent-2);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--glass-shadow);
  padding: 1.4rem 1.5rem;
  color: var(--ink);
}

.label-eyebrow {
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: .68rem;
  color: var(--ink-dim);
  margin-bottom: .5rem;
}

.streak-num {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 2.4rem;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.glass-input {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--glass-border);
  color: var(--ink);
  border-radius: 14px;
}
.glass-input::placeholder {
  color: var(--ink-faint);
}
.glass-input:focus {
  background: rgba(255,255,255,0.09);
  border-color: var(--accent);
  color: var(--ink);
  box-shadow: 0 0 0 .2rem rgba(56,189,248,0.25);
}

.btn-glass {
  background: linear-gradient(135deg, rgba(56,189,248,0.55), rgba(59,130,246,0.55));
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--ink);
  font-weight: 600;
  border-radius: 12px;
  padding: .55rem 1.2rem;
  font-size: .88rem;
}
.btn-glass:hover {
  background: linear-gradient(135deg, rgba(56,189,248,0.72), rgba(59,130,246,0.72));
  color: var(--ink);
}

.habit-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .6rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.habit-row:last-child {
  border-bottom: none;
}

.check-circle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--glass-border);
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s ease;
}
.check-circle.done {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  box-shadow: 0 0 14px rgba(56,189,248,0.55);
}
.check-circle.done i {
  color: #0b1120;
  font-size: .7rem;
}
.check-circle i {
  font-size: .7rem;
  color: transparent;
}

/* Same visual as .check-circle, but usable directly on a native
   <input type="checkbox"> so existing onchange/auto-submit behavior
   keeps working — no extra JS needed to toggle a fake control. */
input.check-circle {
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
}
input.check-circle:checked {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  box-shadow: 0 0 14px rgba(56,189,248,0.55);
}
input.check-circle:checked::after {
  content: '\2713';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0b1120;
  font-size: .7rem;
  font-weight: 700;
}

.table-glass {
  color: var(--ink);
  --bs-table-color: var(--ink);
  --bs-table-bg: transparent;
  --bs-table-striped-color: var(--ink);
  --bs-table-striped-bg: rgba(255,255,255,0.05);
  --bs-table-hover-color: var(--ink);
  --bs-table-hover-bg: rgba(255,255,255,0.08);
  --bs-table-border-color: rgba(255,255,255,0.1);
}
.table-glass thead th {
  color: var(--ink-dim);
  border-bottom-color: rgba(255,255,255,0.16);
  font-weight: 600;
}

.heatmap {
  display: grid;
  grid-template-columns: repeat(26, 1fr);
  gap: 4px;
  margin-top: .6rem;
}
.heat-cell {
  aspect-ratio: 1;
  border-radius: 4px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
}
.heat-cell.l1 { background: rgba(56,189,248,0.25); }
.heat-cell.l2 { background: rgba(56,189,248,0.5); }
.heat-cell.l3 { background: rgba(56,189,248,0.78); box-shadow: 0 0 6px rgba(56,189,248,0.5); }
.heat-cell.l4 {
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  box-shadow: 0 0 10px rgba(59,130,246,0.6);
}