/* ============================================
   B_77 Kalender — Design im B77-Stil
   Inter Tight, Dark-Theme, Crosshair-Ästhetik
   ============================================ */

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

:root {
  --bg: #0a0a0a;
  --bg-2: #111;
  --bg-3: #1a1a1a;
  --fg: #f5f5f5;
  --fg-dim: #888;
  --fg-dimmer: #555;
  --line: #222;
  --line-2: #333;
  --accent: #f5f5f5;
  --success: #6ee7a0;
  --warn: #f5b042;
  --danger: #ff6b6b;
  --available: #6ee7a0;
  --booked: #f5b042;
  --past: #333;
}

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter Tight', -apple-system, sans-serif;
  font-weight: 400;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
}

a { color: var(--fg); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select {
  font-family: inherit;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  color: var(--fg);
  padding: 0.7rem 0.9rem;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  transition: border-color 0.15s ease;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--fg);
}

/* ============== NAV ============== */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 3rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.nav-brand .mark {
  width: 28px;
  height: 28px;
  border: 1.5px solid var(--fg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.7rem;
  letter-spacing: 0;
}

.nav-meta {
  font-size: 0.75rem;
  color: var(--fg-dim);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-align: right;
  line-height: 1.5;
}

.nav-meta strong { color: var(--fg); font-weight: 600; }

/* ============== HEAD ============== */
.head {
  padding: 4rem 3rem 2.5rem;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.head .kicker {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--fg-dim);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.head .kicker::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--available);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--available);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.head h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: 1.5rem;
}

.head h1 .dot {
  display: inline-block;
  width: 0.4em;
  height: 0.4em;
  background: var(--fg);
  border-radius: 50%;
  vertical-align: 0.1em;
  margin-left: 0.1em;
}

.head .sub {
  font-size: 1rem;
  color: var(--fg-dim);
  max-width: 600px;
  line-height: 1.6;
}

.head .meta-line {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--fg-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

/* ============== CONTAINER ============== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 3rem;
}

.section-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--fg-dim);
  margin-bottom: 1.5rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-label .count {
  background: var(--bg-2);
  padding: 0.2rem 0.6rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--fg);
}

/* ============== BUTTONS ============== */
.btn {
  background: var(--fg);
  color: var(--bg);
  border: none;
  padding: 0.85rem 1.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn:hover { transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--line-2);
}

.btn-ghost:hover {
  border-color: var(--fg);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}

.btn-danger:hover {
  background: var(--danger);
  color: var(--bg);
}

.btn-sm {
  padding: 0.5rem 0.9rem;
  font-size: 0.8rem;
}

/* ============== FORMS ============== */
.form-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
  align-items: center;
}

.form-row label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
}

.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
}

.form-row textarea { min-height: 80px; resize: vertical; }

.form-card {
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

/* ============== KALENDER-GRID ============== */
.calendar-wrap {
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.calendar-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.calendar-head h3 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.calendar-head .range {
  font-size: 0.8rem;
  color: var(--fg-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.cal-grid {
  display: grid;
  grid-template-columns: 70px repeat(var(--days, 5), 1fr);
  gap: 1px;
  background: var(--line);
}

.cal-cell {
  background: var(--bg-2);
  padding: 0.7rem 0.5rem;
  min-height: 50px;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.cal-cell.head-cell {
  background: var(--bg-3);
  flex-direction: column;
  gap: 0.2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.cal-cell.head-cell .weekday {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
}

.cal-cell.head-cell .date {
  font-size: 1rem;
}

.cal-cell.time-cell {
  background: var(--bg-3);
  color: var(--fg-dim);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.cal-slot {
  cursor: pointer;
  transition: all 0.12s ease;
  border: 1px solid transparent;
  position: relative;
}

/* ============== SLOT-ZUSTÄNDE ============== */

/* Admin: leer (nicht angeboten) */
.cal-slot.empty {
  background: var(--bg-2);
  color: var(--fg-dimmer);
}

.cal-slot.empty:hover {
  background: var(--bg-3);
  border-color: var(--line-2);
}

.cal-slot.empty::after {
  content: '+';
  font-size: 1.1rem;
  font-weight: 300;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.cal-slot.empty:hover::after {
  opacity: 0.5;
}

/* Verfügbar (vom Admin angeboten) */
.cal-slot.available {
  background: rgba(110, 231, 160, 0.08);
  color: var(--available);
  border-color: rgba(110, 231, 160, 0.3);
  font-weight: 500;
}

.cal-slot.available:hover {
  background: rgba(110, 231, 160, 0.18);
  border-color: var(--available);
}

.cal-slot.available::before {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--available);
}

/* Gebucht */
.cal-slot.booked {
  background: rgba(245, 176, 66, 0.1);
  color: var(--warn);
  border-color: rgba(245, 176, 66, 0.3);
  font-weight: 500;
  cursor: default;
}

.cal-slot.booked::before {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  width: 6px;
  height: 6px;
  background: var(--warn);
}

/* Vergangen */
.cal-slot.past {
  background: var(--bg-2);
  color: var(--past);
  cursor: not-allowed;
  text-decoration: line-through;
  opacity: 0.4;
}

/* Vom Kunden ausgewählt (in book.html) */
.cal-slot.selected {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
  font-weight: 700;
}

/* Aktuelle Buchung des Kunden (in book.html bei Umbuchung) */
.cal-slot.my-booking {
  background: rgba(110, 231, 160, 0.2);
  color: var(--available);
  border-color: var(--available);
  font-weight: 700;
}

.cal-slot.my-booking::after {
  content: '✓';
  position: absolute;
  top: 4px;
  right: 4px;
  font-size: 0.7rem;
}

/* ============== LEGENDE ============== */
.legend {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--fg-dim);
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  margin-top: 1rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border: 1px solid var(--line-2);
}

.legend-dot.available { background: rgba(110, 231, 160, 0.15); border-color: var(--available); }
.legend-dot.booked { background: rgba(245, 176, 66, 0.15); border-color: var(--warn); }
.legend-dot.empty { background: var(--bg-2); }

/* ============== KUNDENLISTE (Admin) ============== */
.customer-list {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.customer-row {
  background: var(--bg-2);
  padding: 1rem 1.2rem;
  display: grid;
  grid-template-columns: 1fr 200px 200px auto;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  transition: background 0.12s ease;
}

.customer-row:hover { background: var(--bg-3); }

.customer-row.active {
  background: var(--bg-3);
  border-left: 3px solid var(--fg);
  padding-left: calc(1.2rem - 3px);
}

.customer-row .name {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.customer-row .email {
  font-size: 0.85rem;
  color: var(--fg-dim);
  display: block;
  margin-top: 0.2rem;
}

.customer-row .range,
.customer-row .status {
  font-size: 0.8rem;
  color: var(--fg-dim);
  letter-spacing: 0.05em;
}

.customer-row .status .booked-info {
  color: var(--warn);
  font-weight: 600;
}

.customer-row .status .open-info {
  color: var(--available);
  font-weight: 600;
}

/* ============== INFO-BOX / BOOKING-INFO ============== */
.info-box {
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  padding: 1.5rem;
  margin-bottom: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.info-box .item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.info-box .item .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
}

.info-box .item .value {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ============== MODAL ============== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  backdrop-filter: blur(4px);
}

.modal-backdrop.active { display: flex; }

.modal {
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  padding: 2rem;
  width: 90%;
  max-width: 500px;
  position: relative;
}

.modal h3 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.modal .modal-sub {
  color: var(--fg-dim);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  gap: 0.8rem;
  margin-top: 1.5rem;
  justify-content: flex-end;
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--fg-dim);
  font-size: 1.5rem;
  cursor: pointer;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover { color: var(--fg); }

/* ============== STATUS / ALERT ============== */
.alert {
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--fg);
  background: var(--bg-2);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.alert.success { border-color: var(--available); }
.alert.success .alert-title { color: var(--available); }
.alert.warn { border-color: var(--warn); }
.alert.warn .alert-title { color: var(--warn); }
.alert.danger { border-color: var(--danger); }
.alert.danger .alert-title { color: var(--danger); }

.alert-title {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.75rem;
  margin-bottom: 0.3rem;
}

/* ============== LINK-COPY ============== */
.link-box {
  background: var(--bg-3);
  border: 1px dashed var(--line-2);
  padding: 1rem;
  font-family: 'SF Mono', Menlo, monospace;
  font-size: 0.85rem;
  color: var(--fg-dim);
  word-break: break-all;
  margin: 1rem 0;
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  color: var(--fg);
  padding: 0.3rem 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.copy-btn:hover { background: var(--bg); }
.copy-btn.copied { background: var(--available); color: var(--bg); border-color: var(--available); }

/* ============== EMPTY STATE ============== */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--fg-dim);
}

.empty-state .icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.3;
}

.empty-state h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--fg);
}

/* ============== RESPONSIVE ============== */
@media (max-width: 768px) {
  .nav, .head, .container { padding: 1.5rem; }
  .head { padding-top: 2.5rem; }
  .head h1 { font-size: 2.2rem; }
  .form-row { grid-template-columns: 1fr; gap: 0.4rem; }
  .customer-row { grid-template-columns: 1fr; gap: 0.5rem; padding: 1rem; }
  .customer-row .range, .customer-row .status { font-size: 0.75rem; }
  .cal-grid { font-size: 0.7rem; }
  .cal-cell { padding: 0.4rem 0.2rem; min-height: 40px; }
  .cal-cell.time-cell { font-size: 0.65rem; }
  .nav-meta { display: none; }
}

/* ============== CROSSHAIR-Deko im Hintergrund ============== */
.head::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 300px;
  height: 300px;
  border: 1px solid var(--line);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.3;
}

.head::after {
  content: '';
  position: absolute;
  top: 50px;
  right: 50px;
  width: 200px;
  height: 200px;
  border: 1px solid var(--line);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.5;
}