:root {
  color-scheme: light;
  --bg: #f4f1ec;
  --bg-top: #faf7f2;
  --card: #ffffff;
  --card-soft: #faf9f6;
  --cell: #fffdf9;
  --ink: #1f2937;
  --muted: #6b7280;
  --accent: #c76d3a;
  --accent-soft: #f7dfd0;
  --tag-ink: #8f4317;
  --border: #e5ded5;
  --shadow: 0 18px 40px rgba(31, 41, 55, 0.08);
  --today-bg: #fff1c7;
  --today-border: #d97706;
  --today-shadow: rgba(217, 119, 6, 0.18);
  --today-date: #9a3412;
  --today-chip-bg: #b45309;
  --today-chip-ink: #fffaf3;
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #111827;
  --bg-top: #0b1120;
  --card: #172033;
  --card-soft: #1e293b;
  --cell: #132033;
  --ink: #e5eefc;
  --muted: #b6c2d2;
  --accent: #f39b63;
  --accent-soft: rgba(243, 155, 99, 0.2);
  --tag-ink: #ffd7bd;
  --border: #314158;
  --shadow: 0 20px 45px rgba(2, 6, 23, 0.45);
  --today-bg: rgba(245, 158, 11, 0.18);
  --today-border: #fbbf24;
  --today-shadow: rgba(251, 191, 36, 0.18);
  --today-date: #ffffff;
  --today-chip-bg: #fbbf24;
  --today-chip-ink: #1f2937;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 100%);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button {
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  padding: 0.85rem 1.15rem;
}

.button-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border);
}

button[disabled] {
  background: #d1d5db;
  cursor: not-allowed;
}

.app-shell {
  margin: 0 auto;
  max-width: 1600px;
  padding: 1.5rem;
  display: grid;
  gap: 1rem;
}

.hero-card,
.calendar-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-card h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3rem);
}

.hero-copy {
  margin: 0.5rem 0 0;
  font-size: 1rem;
  line-height: 1.5;
}

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

.nav-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.calendar-card {
  padding: 0.75rem;
}

.calendar-card--today {
  border-color: var(--today-border);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.6rem;
}

.day-header {
  padding: 0.7rem 0.45rem;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--muted);
}

.day-cell {
  min-height: 140px;
  padding: 0.9rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--cell);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.day-cell--empty {
  background: transparent;
  border-style: dashed;
}

.day-cell--today {
  background: var(--today-bg);
  border-color: var(--today-border);
  box-shadow: 0 0 0 1px var(--today-border), 0 18px 32px var(--today-shadow);
}

.day-cell__date-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.day-cell__badges {
  display: flex;
  gap: 0.4rem;
  align-items: flex-start;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.day-cell__date {
  font-size: 1.15rem;
  font-weight: 700;
}

.day-cell--today .day-cell__date {
  color: var(--today-date);
}

.day-cell__weekday {
  margin: 0 0 0.2rem;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.day-cell__content {
  display: grid;
  gap: 0.4rem;
}

.day-cell__content p {
  margin: 0;
  line-height: 1.4;
}

.tag {
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--tag-ink);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.3rem 0.55rem;
  text-transform: uppercase;
}

.tag--today {
  background: var(--today-chip-bg);
  color: var(--today-chip-ink);
}

@media (max-width: 900px) {
  .calendar-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .day-cell,
  .day-cell--empty {
    min-height: unset;
  }

  .day-cell--empty {
    display: none;
  }
}

@media (max-width: 540px) {
  .app-shell {
    padding: 0.5rem;
    gap: 0.5rem;
  }

  .hero-card {
    padding: 0.75rem;
    gap: 0.5rem;
  }

  .hero-card h1 {
    font-size: clamp(1.3rem, 5vw, 2rem);
  }

  .hero-copy {
    margin: 0.25rem 0 0;
    font-size: 0.85rem;
    line-height: 1.4;
  }

  .hero-card,
  .calendar-card {
    border-radius: 16px;
  }

  .calendar-card {
    padding: 0.4rem;
  }

  .calendar-grid {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .day-header {
    display: none;
  }

  .day-cell {
    min-height: unset;
    padding: 0.55rem 0.7rem;
    border-radius: 12px;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
  }

  .day-cell--empty {
    display: none;
  }

  .day-cell__date-row {
    flex-shrink: 0;
  }

  .day-cell__weekday {
    margin: 0 0 0.1rem;
    font-size: 0.7rem;
  }

  .day-cell__date {
    font-size: 1rem;
  }

  .day-cell__content {
    flex: 1;
    display: flex;
    flex-direction: row;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
  }

  .day-cell__content p {
    font-size: 0.82rem;
  }

  .day-cell__badges {
    flex-shrink: 0;
  }

  .tag {
    font-size: 0.65rem;
    padding: 0.2rem 0.4rem;
  }

  .nav-controls {
    flex-wrap: nowrap;
    gap: 0.4rem;
  }

  .nav-controls button {
    flex: 1;
    padding: 0.6rem 0.4rem;
    font-size: 0.82rem;
    white-space: nowrap;
    text-align: center;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .button-secondary {
    flex: 0 0 auto;
    padding: 0.6rem;
    font-size: 0.82rem;
  }
}