/* ================= BASE ================= */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b1220;
  color: #e5e7eb;
}

/* ================= NAVBAR ================= */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  background: rgba(17, 26, 46, 0.9);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.logo {
  font-weight: bold;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  gap: 15px;
}

.nav-links a {
  color: #cbd5e1;
  text-decoration: none;
  transition: 0.2s;
}

.nav-links a:hover {
  color: white;
}

.back-btn {
  background: linear-gradient(135deg,#4f46e5,#3b82f6);
  color: white;
  padding: 8px 12px;
  border-radius: 8px;
  text-decoration: none;
  transition: 0.2s;
}

.back-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 15px rgba(59,130,246,0.4);
}

/* ================= PAGE ================= */
.booking-page {
  display: flex;
  justify-content: center;
  padding: 40px 15px;
}

/* ================= CARD ================= */
.booking-card {
  width: 100%;
  max-width: 500px;
  background: rgba(17, 26, 46, 0.95);
  padding: 22px;
  border-radius: 16px;
  border: 1px solid #1f2a44;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4);
  backdrop-filter: blur(6px);
}

/* ================= TITLE ================= */
.booking-card h2 {
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

/* ================= CALENDAR ================= */
#calendar {
  margin-top: 10px;
  font-size: 14px;
  border-radius: 10px;
  overflow: hidden;
}

/* ================= DATE TEXT ================= */
#selectedDate {
  text-align: center;
  margin: 12px 0;
  color: #cbd5e1;
  font-size: 14px;
}

/* ================= INPUT ================= */
.input {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  border-radius: 10px;
  border: 1px solid #334155;
  background: #0b1220;
  color: white;
  transition: 0.2s;
}

.input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 2px rgba(59,130,246,0.3);
}

/* ================= BUTTON ================= */
.btn {
  width: 100%;
  margin-top: 15px;
  padding: 13px;
  background: linear-gradient(135deg,#4f46e5,#3b82f6);
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.25s;
  font-weight: bold;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(59,130,246,0.5);
}

/* ================= CALENDAR EVENTS ================= */
.fc-event {
  background: #ef4444 !important;
  border: none !important;
  opacity: 0.85;
  border-radius: 6px;
}

/* ================= SLOT SYSTEM ================= */
.slot {
  padding: 10px;
  margin: 5px;
  border-radius: 6px;
  background: #1f2937;
  color: white;
  cursor: pointer;
  transition: 0.3s ease;
  text-align: center;
}

.slot:hover {
  background: #374151;
}

.slot.booked {
  background: #ef4444 !important;
  color: white;
  cursor: not-allowed;
  opacity: 0.6;
  pointer-events: none;
}

/* ================= HAMBURGER ================= */
.hamburger {
  display: none;
  font-size: 26px;
  cursor: pointer;
  color: white;
}

/* ================= MOBILE ================= */
@media (max-width: 768px) {

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 60px;
    right: 15px;
    background: #111a2e;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  }

  .nav-links.active {
    display: flex;
  }

  .hamburger {
    display: block;
  }

  .booking-card {
    padding: 18px;
  }
}