:root {
  color-scheme: light dark;
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel-soft: #f9fafb;
  --text: #14171f;
  --muted: #687082;
  --faint: #9299a8;
  --line: #e4e7ee;
  --line-strong: #d4d9e4;
  --accent: #2457c5;
  --accent-text: #1746a2;
  --accent-soft: #edf3ff;
  --success: #047857;
  --success-soft: #dcfce7;
  --warn: #a15c07;
  --warn-soft: #fff2d8;
  --danger: #b42318;
  --danger-soft: #fee4e2;
  --shadow: 0 22px 70px rgba(19, 28, 45, 0.12);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1017;
    --panel: #151a23;
    --panel-soft: #10151d;
    --text: #edf1f7;
    --muted: #a1a9b8;
    --faint: #768091;
    --line: #27303d;
    --line-strong: #343f4f;
    --accent: #86a6ff;
    --accent-text: #b8c9ff;
    --accent-soft: #1c2948;
    --success: #62d49d;
    --success-soft: #133022;
    --warn: #f0b35b;
    --warn-soft: #302513;
    --danger: #ff8f85;
    --danger-soft: #351918;
    --shadow: 0 22px 80px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body {
  min-height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.45;
  letter-spacing: 0;
}
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.55; }

.app-shell { width: min(1080px, calc(100vw - 32px)); margin: 28px auto 56px; }
.booking-card {
  display: grid;
  grid-template-columns: 292px minmax(320px, 1fr) 306px;
  min-height: 626px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel { padding: 26px; min-width: 0; }
.info-panel, .calendar-panel { border-right: 1px solid var(--line); }
.brand-row { display: flex; align-items: center; gap: 11px; margin-bottom: 22px; }
.logo {
  width: 42px; height: 42px; border-radius: 999px; display: grid; place-items: center; flex: none;
  background: var(--accent); color: #fff; font-weight: 800; overflow: hidden;
}
.logo img { width: 100%; height: 100%; object-fit: cover; }
.brand-name { color: var(--muted); font-weight: 700; overflow-wrap: anywhere; }
.event-title { margin: 0 0 18px; font-size: 24px; line-height: 1.15; letter-spacing: 0; }
.meta-list { display: grid; gap: 10px; margin: 0 0 18px; color: var(--muted); font-weight: 650; }
.meta-item { display: flex; align-items: center; gap: 10px; }
.icon { width: 18px; text-align: center; opacity: 0.85; }
.description { border-top: 1px solid var(--line); padding-top: 16px; color: var(--muted); }
.timezone-wrap { margin-top: 18px; }
.timezone-label { display: block; font-size: 12px; color: var(--faint); font-weight: 750; margin-bottom: 6px; text-transform: uppercase; }
.timezone-select {
  width: 100%; border: 1px solid var(--line); border-radius: 9px; background: var(--panel-soft); color: var(--text);
  padding: 10px 11px;
}

.month-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 18px; }
.month-title { font-weight: 850; font-size: 16px; }
.nav-group { display: flex; gap: 6px; }
.icon-btn { width: 34px; height: 34px; border-radius: 9px; border: 1px solid var(--line); background: var(--panel-soft); color: var(--text); }
.weekdays, .days { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 5px; }
.weekdays { margin-bottom: 8px; color: var(--faint); font-size: 11px; font-weight: 850; text-align: center; }
.day {
  aspect-ratio: 1; border: 1px solid transparent; border-radius: 10px; background: transparent; color: var(--faint);
  display: grid; place-items: center; font-weight: 750;
}
.day.in-month { color: var(--text); }
.day.available { background: var(--accent-soft); color: var(--accent-text); }
.day.selected { background: var(--accent); color: #fff; }
.day:not(:disabled):hover { border-color: var(--accent); }

.slots-panel { display: flex; flex-direction: column; }
.slot-header { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; }
.slot-title { font-weight: 850; }
.segment { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.segment button { border: 0; background: transparent; color: var(--muted); padding: 6px 9px; font-size: 12px; font-weight: 800; }
.segment button.active { background: var(--accent-soft); color: var(--accent-text); }
.slot-list { display: grid; gap: 9px; max-height: 398px; overflow: auto; padding-right: 2px; }
.slot-btn { border: 1px solid var(--line); background: var(--panel); color: var(--text); border-radius: 10px; padding: 13px; font-weight: 800; }
.slot-btn:hover, .slot-btn.selected { border-color: var(--accent); color: var(--accent-text); background: var(--accent-soft); }
.state-box { min-height: 260px; display: grid; place-items: center; text-align: center; color: var(--muted); }
.state-box strong { display: block; color: var(--text); font-size: 16px; margin-bottom: 6px; }
.alert { border-radius: 10px; padding: 11px 12px; margin-bottom: 14px; font-weight: 700; }
.alert.warn { background: var(--warn-soft); color: var(--warn); border: 1px solid color-mix(in srgb, var(--warn) 45%, transparent); }
.alert.error { background: var(--danger-soft); color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 45%, transparent); }

.form-panel { grid-column: span 2; padding: 28px; }
.back-button { border: 0; background: transparent; color: var(--muted); font-weight: 800; padding: 0 0 16px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; max-width: 640px; }
.field { display: grid; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 12px; font-weight: 850; color: var(--text); }
.field input, .field textarea {
  border: 1px solid var(--line); border-radius: 10px; background: var(--panel-soft); color: var(--text); padding: 11px 12px;
  min-width: 0;
}
.field textarea { min-height: 96px; resize: vertical; }
.guest-row { display: flex; gap: 8px; }
.guest-row input { flex: 1; }
.secondary-btn, .remove-btn {
  border: 1px solid var(--line); border-radius: 9px; background: var(--panel-soft); color: var(--text); font-weight: 800; padding: 9px 11px;
}
.primary-btn { border: 0; border-radius: 10px; background: var(--accent); color: #fff; padding: 13px 16px; font-weight: 900; }
.actions { display: flex; align-items: center; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.fine-print { color: var(--faint); font-size: 12px; }

.confirmation { max-width: 680px; margin: 0 auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 32px; text-align: center; }
.check { width: 58px; height: 58px; border-radius: 999px; background: var(--success-soft); color: var(--success); display: grid; place-items: center; margin: 0 auto 16px; font-size: 28px; font-weight: 900; }
.confirmation h1 { margin: 0 0 8px; font-size: 24px; }
.detail-list { margin: 22px auto; max-width: 480px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; text-align: left; }
.detail-row { display: grid; grid-template-columns: 105px 1fr; gap: 12px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.detail-row:last-child { border-bottom: 0; }
.detail-row span:first-child { color: var(--faint); font-weight: 800; }
.link-row { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-top: 14px; }
.link-row button { border: 0; background: transparent; color: var(--accent-text); font-weight: 850; }

.manage-card { max-width: 640px; margin: 0 auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; }
.manage-card h1 { margin: 0 0 8px; }
.manage-card p { color: var(--muted); }

@media (max-width: 920px) {
  .app-shell { width: min(100% - 20px, 700px); margin-top: 10px; }
  .booking-card { grid-template-columns: 1fr; min-height: 0; }
  .info-panel, .calendar-panel { border-right: 0; border-bottom: 1px solid var(--line); }
  .form-panel { grid-column: auto; }
  .form-grid { grid-template-columns: 1fr; }
}