:root {
  --brand: #6b3f2d;
  --paper: #efe7dc;
  --ink: #1a2433;
  --muted: #6b7280;
  --ok: #3b7e41;
  --warn: #b7791f;
  --full: #9b2c2c;
  --card: #f5efe6;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  background: #fff;
  color: var(--ink);
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    Inter,
    Arial,
    sans-serif;
  margin: 0;
}

.page-header {
  margin: 0 auto;
  max-width: 1100px;
  padding: 32px 16px 8px;
}

.page-header h1 {
  font-size: 36px;
  margin: 0 0 8px;
}

.page-header p {
  color: var(--muted);
  margin: 0;
}

.tabs {
  display: flex;
  gap: 8px;
  margin: 12px auto 8px;
  max-width: 1100px;
  padding: 0 16px;
}

.tab-btn {
  background: #fff;
  border: 2px solid var(--brand);
  border-radius: 999px;
  color: var(--brand);
  cursor: pointer;
  font-weight: 700;
  padding: 10px 14px;
}

.tab-btn.active {
  background: var(--brand);
  color: #fff;
}

.tab-panel {
  display: none;
  margin: 0 auto;
  max-width: 1100px;
  padding: 8px 16px 40px;
}

.tab-panel.active {
  display: block;
}

.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1.05fr 0.95fr;
}

@media (width <= 900px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.cal-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 10px 20px rgb(0 0 0 / 7%);
  padding: 14px;
}

.cal-head {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  padding: 8px 6px;
}

.cal-head .title {
  font-weight: 800;
}

.cal-head .nav {
  background: var(--brand);
  border: none;
  border-radius: 10px;
  color: #fff;
  cursor: pointer;
  font-size: 22px;
  height: 40px;
  width: 40px;
}

.cal {
  display: grid;
  gap: 6px;
  grid-template-columns: repeat(7, 1fr);
}

.cal .day,
.cal .wk {
  border-radius: 10px;
  padding: 7px 4px;
  text-align: center;
}

.cal .wk {
  color: var(--muted);
  font-weight: 700;
}

.cell {
  background: #fff;
  border: 1px solid #eee;
  border-radius: 12px;
  cursor: pointer;
  padding: 10px 0;
  position: relative;
  user-select: none;
}

.cell.inactive {
  cursor: not-allowed;
  opacity: 0.35;
}

.cell.full {
  background: linear-gradient(180deg, #fff, #fde8e8);
  border-color: #f5cccc;
}

.cell.partial {
  background: linear-gradient(180deg, #fff, #fff7ea);
  border-color: #ffe3b3;
}

.cell.range {
  outline: 3px solid var(--brand);
}

.cell.start::after,
.cell.end::after {
  background: var(--brand);
  border-radius: 50%;
  bottom: 6px;
  content: '';
  height: 8px;
  left: 50%;
  position: absolute;
  transform: translateX(-50%);
  width: 8px;
}

.legend {
  align-items: center;
  color: var(--muted);
  display: flex;
  gap: 12px;
  margin-top: 10px;
}

.legend .dot {
  border: 1px solid #ddd;
  border-radius: 50%;
  display: inline-block;
  height: 10px;
  margin-right: 4px;
  width: 10px;
}

.legend .dot.free {
  background: #e9f7ea;
  border-color: #d3edd6;
}

.legend .dot.partial {
  background: #fff7ea;
  border-color: #ffe3b3;
}

.legend .dot.full {
  background: #fde8e8;
  border-color: #f5cccc;
}

.booking-form {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 10px 20px rgb(0 0 0 / 7%);
  padding: 16px;
  position: sticky;
  top: 12px;
}

.booking-form h3 {
  margin: 0 0 8px;
}

label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin: 10px 0 6px;
}

input,
textarea,
select {
  border: 2px solid #dfe3e8;
  border-radius: 12px;
  font-size: 16px;
  padding: 12px;
  width: 100%;
}

.split {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
}

@media (width <= 640px) {
  .split {
    grid-template-columns: 1fr;
  }
}

.consent {
  align-items: flex-start;
  display: flex;
  font-weight: 500;
  gap: 10px;
}

.cta {
  background: var(--brand);
  border: none;
  border-radius: 999px;
  color: #fff;
  cursor: pointer;
  font-weight: 800;
  margin-top: 8px;
  padding: 14px 18px;
}

.cta:hover {
  box-shadow: 0 8px 18px rgb(107 63 45 / 25%);
  transform: translateY(-1px);
}