.calendar-body {
  background: radial-gradient(circle at top left, rgba(76, 29, 149, 0.14), transparent 45%), #0f172a;
  min-height: 100vh;
  color: #e2e8f0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.calendar-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2rem 5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
}

.calendar-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.calendar-card {
  background: rgba(15, 23, 42, 0.78);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 22px;
  padding: 1.5rem 1.6rem;
  box-shadow: 0 32px 55px -40px rgba(15, 23, 42, 0.9);
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.calendar-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.calendar-card__label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(148, 163, 184, 0.75);
}

.calendar-card__icon {
  font-size: 1.2rem;
}

.calendar-card__value {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  font-weight: 700;
  color: #f8fafc;
  font-size: 2rem;
}

.calendar-card__value small {
  font-size: 0.95rem;
  color: rgba(148, 163, 184, 0.78);
}

.calendar-card__caption {
  font-size: 0.9rem;
  color: rgba(148, 163, 184, 0.78);
  margin: 0;
}

.calendar-card__progress {
  height: 8px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.18);
  overflow: hidden;
}

.calendar-card__progress > div {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #38bdf8, #818cf8);
  width: 0%;
  transition: width 0.4s ease;
}

.calendar-panel {
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 26px;
  padding: 2.25rem;
  box-shadow: 0 50px 75px -60px rgba(15, 23, 42, 0.95);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.calendar-panel__header {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  align-items: center;
}

.calendar-panel__header h1 {
  margin: 0;
  font-size: 1.8rem;
  color: #f8fafc;
}

.calendar-panel__header p {
  margin: 0.4rem 0 0 0;
  color: rgba(148, 163, 184, 0.78);
  font-size: 0.95rem;
}

.calendar-filter {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 240px;
}

.calendar-filter label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(148, 163, 184, 0.72);
}

.calendar-select {
  position: relative;
}

.calendar-select select {
  appearance: none;
  width: 100%;
  border-radius: 16px;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(15, 23, 42, 0.9);
  color: #f8fafc;
  font: inherit;
  cursor: pointer;
  transition: border 0.3s ease, box-shadow 0.3s ease;
}

.calendar-select select:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15);
}

.calendar-select::after {
  content: '▾';
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(148, 163, 184, 0.7);
  pointer-events: none;
}

.calendar-heatmap-shell {
  background: rgba(2, 6, 23, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 22px;
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  --calendar-cell-size: 16px;
  --calendar-column-gap: 4px;
  --calendar-row-gap: 4px;
  --calendar-month-label-width: calc(var(--calendar-cell-size) + var(--calendar-column-gap));
}

.calendar-months {
  display: flex;
  gap: var(--calendar-column-gap);
  margin-left: 48px;
  color: rgba(148, 163, 184, 0.65);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.calendar-months span {
  width: var(--calendar-month-label-width);
  text-align: left;
}

.calendar-heatmap-body {
  display: flex;
  gap: 12px;
}

.calendar-weekdays {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2px 0;
  color: rgba(148, 163, 184, 0.6);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.calendar-weekdays span {
  height: max(var(--calendar-cell-size), 12px);
  line-height: max(var(--calendar-cell-size), 12px);
}

.calendar-heatmap {
  display: flex;
  gap: var(--calendar-column-gap);
  overflow-x: auto;
  padding-bottom: 4px;
}

.calendar-week {
  display: flex;
  flex-direction: column;
  gap: var(--calendar-row-gap);
}

.calendar-day {
  width: var(--calendar-cell-size);
  height: var(--calendar-cell-size);
  border-radius: 4px;
  background: #1f2937;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.calendar-day[data-count="0"] { background: rgba(15, 23, 42, 0.85); }
.calendar-day[data-count="1"] { background: #0f766e; }
.calendar-day[data-count="2"] { background: #0d9488; }
.calendar-day[data-count="3"] { background: #14b8a6; }
.calendar-day[data-count="4"] { background: #2dd4bf; }
.calendar-day[data-count="5"] { background: #5eead4; }

.calendar-day.is-today {
  outline: 1px solid rgba(148, 163, 184, 0.8);
  outline-offset: 1px;
}

.calendar-day:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 20px -16px rgba(14, 165, 233, 0.6);
  z-index: 2;
}

.calendar-day:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 50%;
  top: -38px;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.95);
  color: #f8fafc;
  padding: 0.4rem 0.6rem;
  border-radius: 8px;
  font-size: 0.75rem;
  white-space: nowrap;
  box-shadow: 0 14px 30px -20px rgba(15, 23, 42, 0.6);
}

.calendar-legend {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: rgba(148, 163, 184, 0.65);
  font-size: 0.8rem;
}

.calendar-legend-scale {
  display: flex;
  gap: 0.25rem;
}

.calendar-legend-scale span {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: rgba(15, 23, 42, 0.85);
}

.calendar-legend-scale span[data-level="1"] { background: #0f766e; }
.calendar-legend-scale span[data-level="2"] { background: #0d9488; }
.calendar-legend-scale span[data-level="3"] { background: #14b8a6; }
.calendar-legend-scale span[data-level="4"] { background: #2dd4bf; }
.calendar-legend-scale span[data-level="5"] { background: #5eead4; }

@media (max-width: 768px) {
  .calendar-page {
    padding: 3.2rem 1.5rem 4rem 1.5rem;
    align-items: center;
  }

  .calendar-metrics {
    justify-items: center;
    gap: 1.25rem;
  }

  .calendar-card {
    width: min(100%, 320px);
  }

  .calendar-panel {
    padding: 1.75rem;
    width: min(100%, 720px);
    margin: 0 auto;
    align-items: center;
  }

  .calendar-months {
    justify-content: flex-start;
  }

  .calendar-weekdays {
    font-size: 0.7rem;
  }

  .calendar-card__value {
    font-size: 1.8rem;
  }

  .calendar-heatmap-shell {
    align-items: center;
  }

  .calendar-heatmap-body {
    align-items: center;
  }
}

@media (max-width: 540px) {
  .calendar-page {
    padding: 2.75rem 1.25rem 3.5rem 1.25rem;
  }

  .calendar-card {
    width: min(100%, 280px);
  }

  .calendar-panel {
    padding: 1.5rem 1.25rem;
  }
}