@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Montserrat:wght@700;800&display=swap');

:root {
  /* Colors */
  --primary-brand: #03b3b1;
  --primary-dark: #028e8d;
  --deep-navy: #0F2C59;
  --soft-cloud: #F4F7F9;
  --crisp-white: #FFFFFF;
  --subtle-accent: #E0F5F5;
  --success-green: #2ECC71;
  --text-muted: #64748b;
  --border-color: #e2e8f0;

  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing & Utilities */
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--soft-cloud);
  color: var(--deep-navy);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

a {
  text-decoration: none;
  color: var(--primary-brand);
  transition: var(--transition);
}
a:hover {
  filter: brightness(0.9);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

/* Utilities */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.text-center { text-align: center; }
.text-primary { color: var(--primary-brand); }
.text-navy { color: var(--deep-navy); }

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  z-index: 100;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--subtle-accent);
}

.nav-brand {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--primary-brand);
  font-weight: 800;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-links a {
  color: var(--deep-navy);
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--primary-brand);
}

.nav-actions {
  display: flex;
  gap: var(--spacing-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font-body);
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--primary-brand);
  color: var(--crisp-white);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 2px solid var(--primary-brand);
  color: var(--primary-brand);
  background: transparent;
}
.btn-outline:hover {
  background-color: var(--subtle-accent);
}

.btn-block {
  width: 100%;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 44, 89, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--crisp-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: var(--transition);
  position: relative;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}
.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--deep-navy);
}
.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--primary-brand);
  box-shadow: 0 0 0 3px var(--subtle-accent);
}

.input-group {
  display: flex;
  align-items: center;
}
.input-group-addon {
  padding: 0.75rem 1rem;
  background-color: var(--subtle-accent);
  border: 1px solid var(--border-color);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  font-weight: 600;
  color: var(--deep-navy);
}
.input-group .form-control {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Status Messages */
.status-msg {
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
  display: none;
}
.status-msg.error {
  display: block;
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #f87171;
}

/* Sections */
.section {
  padding: var(--spacing-xl) 0;
}

/* Cards */
.card {
  background: var(--crisp-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--subtle-accent);
  color: var(--primary-brand);
}

  .grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
  }

  @media (max-width: 768px) {
    .nav-links { display: none; }
    .section { padding: var(--spacing-lg) 0; }
    h1 { font-size: 2.5rem !important; }
  }

  /* =========================================
     Calendar & Time Slot Booking Module
  ========================================= */
  .booking-widget {
    background: var(--crisp-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
  }

  .booking-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--subtle-accent);
  }
  .booking-header h3 {
    color: var(--deep-navy);
    font-size: 1.25rem;
  }

  /* Calendar Grid */
  .calendar-month-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-weight: 700;
  }
  .calendar-month-controls button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-brand);
  }
  .calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
  }
  .calendar-grid-header {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.85rem;
  }
  .calendar-day {
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: var(--soft-cloud);
    transition: var(--transition);
    font-weight: 500;
  }
  .calendar-day:hover:not(.disabled) {
    background: var(--subtle-accent);
    color: var(--primary-brand);
  }
  .calendar-day.selected {
    background: var(--primary-brand);
    color: var(--crisp-white);
  }
  .calendar-day.disabled {
    opacity: 0.3;
    cursor: not-allowed;
  }

  /* Time Slots */
  .time-slots-container {
    display: none; /* hidden until date selected */
  }
  .time-slots-container.active {
    display: block;
    animation: fadeIn 0.3s ease;
  }
  .slots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
    margin-bottom: var(--spacing-md);
  }
  .slot-btn {
    border: 1px solid var(--border-color);
    background: var(--crisp-white);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-align: center;
    font-size: 0.9rem;
    transition: var(--transition);
    color: var(--deep-navy);
  }
  .slot-btn:hover:not(.booked) {
    border-color: var(--primary-brand);
    color: var(--primary-brand);
    background: var(--subtle-accent);
  }
  .slot-btn.selected {
    background: var(--primary-brand);
    color: var(--crisp-white);
    border-color: var(--primary-brand);
  }
  .slot-btn.booked {
    background: #f1f5f9;
    color: #cbd5e1;
    border-color: #f1f5f9;
    cursor: not-allowed;
    text-decoration: line-through;
  }

  /* Booking Confirmation Banner */
  .selected-slot-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--subtle-accent);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    color: var(--primary-brand);
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
  }

/* Rich Text Rendering */
.rich-text-content h1, .rich-text-content h2, .rich-text-content h3 { margin-top: 1.5rem; margin-bottom: 0.5rem; color: var(--primary-brand); }
.rich-text-content ul { padding-left: 1.5rem; margin-bottom: 1rem; list-style-type: disc; }
.rich-text-content p { margin-bottom: 1rem; line-height: 1.6; }