* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #09090b;
  --surface: #18181b;
  --surface-hover: #1f1f23;
  --border: #27272a;
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --success: #22c55e;
  --radius: 12px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 3rem 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 440px;
  width: 100%;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.host-info {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.2rem 0.6rem 0.6rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  margin-bottom: 1.75rem;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: white;
}

.host-info h1 {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.host-info p {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.2;
}

.page-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Steps */
.step {
  display: none;
  opacity: 0;
  transform: translateY(12px);
}

.step.active {
  display: block;
  animation: slideUp 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUp {
  to { opacity: 1; transform: translateY(0); }
}

.step h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.01em;
}

.date-label {
  font-weight: 500;
  color: var(--accent);
  font-size: 0.8rem;
}

/* Calendar */
.calendar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.calendar-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.calendar-nav button {
  background: var(--surface-hover);
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 34px;
  height: 34px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.15s ease;
}

.calendar-nav button:hover {
  background: #27272a;
  color: var(--text);
  border-color: #3f3f46;
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-size: 0.65rem;
  color: #52525b;
  margin-bottom: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: none;
  background: none;
  color: #3f3f46;
  font-size: 0.82rem;
  cursor: default;
  transition: all 0.2s ease;
  font-family: inherit;
  font-weight: 400;
  position: relative;
}

/* Available (clickable) days */
.calendar-day:not(.disabled):not(.empty) {
  color: var(--text);
  font-weight: 600;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.15);
  cursor: pointer;
}

.calendar-day:not(.disabled):not(.empty):hover {
  background: rgba(59, 130, 246, 0.18);
  border-color: rgba(59, 130, 246, 0.35);
  transform: scale(1.08);
}

.calendar-day.disabled {
  color: #27272a;
  cursor: default;
}

.calendar-day.empty { cursor: default; }

.calendar-day.selected {
  background: var(--accent) !important;
  border-color: var(--accent) !important;
  color: white;
  font-weight: 700;
  box-shadow: 0 0 20px var(--accent-glow), 0 2px 8px rgba(59, 130, 246, 0.3);
  transform: scale(1.08);
}

/* Time Slots */
.tz-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.slots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 1.25rem;
}

.slot-btn {
  padding: 0.65rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 0.8rem;
  font-family: inherit;
  transition: all 0.2s ease;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.slot-btn:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  box-shadow: 0 0 12px var(--accent-glow);
}

.slot-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 0 20px var(--accent-glow);
}

.loading, .no-slots {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Form */
.booking-summary {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}

.form-group {
  margin-bottom: 1.1rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}

.optional {
  color: var(--text-muted);
  font-weight: 400;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  transition: all 0.2s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #52525b;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea { resize: vertical; min-height: 72px; }

.btn-primary {
  width: 100%;
  padding: 0.75rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s ease;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-back {
  display: inline-block;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  font-family: inherit;
  padding: 0.4rem 0;
  transition: color 0.15s;
}

.btn-back:hover { color: var(--text); }

/* Confirmation */
.confirmation {
  text-align: center;
  padding: 2.5rem 0;
}

.check-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  margin: 0 auto 1.5rem;
  box-shadow: 0 0 30px rgba(34, 197, 94, 0.2);
}

.confirmation h3 {
  font-size: 1.3rem;
  justify-content: center;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.confirmation p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
}

.btn-meet {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: var(--accent);
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.btn-meet:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.confirm-note {
  font-size: 0.75rem;
  color: #52525b;
}

/* Mobile */
@media (max-width: 480px) {
  .slots-grid { grid-template-columns: repeat(2, 1fr); }
  body { padding: 2rem 1rem; }
  .page-title { font-size: 1.35rem; }
}