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

:root {
  /* High-Tech Light Mode Palette */
  --color-bg: #f8fafc; /* Very light cool grey */
  --color-surface: rgba(255, 255, 255, 0.85); /* Glassmorphism surface */
  --color-ink: #0f172a; /* Primary text */
  --color-ink-muted: #64748b; /* Secondary text */
  
  --color-primary: #e02440; /* Requested Red */
  --color-primary-hover: #b81b32; 
  --color-primary-glow: rgba(224, 36, 64, 0.25);
  
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-focus: rgba(224, 36, 64, 0.4);
  
  /* Status Colors */
  --color-success: #059669;
  --color-warning: #d97706;

  /* Spacing */
  --space-2: 0.5rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  
  /* Borders and Shadows */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  
  --shadow-surface: 0 10px 40px -10px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 4px 15px var(--color-primary-glow);
}

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

body {
  font-family: 'Sarabun', 'Inter', sans-serif;
  background-color: var(--color-bg);
  background-image: radial-gradient(circle at 50% 0%, rgba(224, 36, 64, 0.05) 0%, transparent 60%);
  color: var(--color-ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3 {
  font-family: 'Inter', 'Sarabun', sans-serif;
  color: var(--color-ink);
  font-weight: 600;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: var(--space-4);
  color: var(--color-ink);
}

h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

p {
  color: var(--color-ink-muted);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-4);
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-12);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-6);
}

.header-brand {
  display: flex;
  flex-direction: column;
}

.header-brand span {
  font-size: 0.875rem;
  color: var(--color-primary);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 0;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(224, 36, 64, 0.25);
}

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

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

.btn-outline:hover {
  background-color: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.15);
}

/* Glassmorphism Containers */
#calendar, .form-container {
  background-color: var(--color-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-surface);
  border: 1px solid rgba(255, 255, 255, 0.6); /* Highlights glass effect */
}

/* FullCalendar Overrides */
.fc-theme-standard td, .fc-theme-standard th {
  border-color: var(--color-border) !important;
}

.fc-col-header-cell-cushion {
  color: var(--color-ink);
  font-weight: 600;
  padding: var(--space-2) !important;
}

.fc-daygrid-day-number {
  color: var(--color-ink-muted);
  text-decoration: none !important;
}

.fc-day-today {
  background-color: rgba(224, 36, 64, 0.05) !important;
}

.fc-event {
  border: none !important;
  border-radius: var(--radius-sm) !important;
  padding: 3px 6px;
  font-size: 0.85rem;
}

.fc .fc-button-primary {
  background-color: transparent !important;
  border: 1px solid var(--color-border) !important;
  color: var(--color-ink) !important;
  transition: all 0.2s;
  background-image: none !important;
  box-shadow: none !important;
}

.fc .fc-button-primary:not(:disabled):hover {
  background-color: rgba(0, 0, 0, 0.03) !important;
}

.fc .fc-button-primary:not(:disabled).fc-button-active {
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
  color: white !important;
}

/* Form Styles */
.form-container {
  max-width: 800px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-row {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.form-row > .form-group {
  flex: 1;
  min-width: 250px;
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-2);
  color: var(--color-ink);
  font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
input[type="time"],
select,
textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  color: var(--color-ink);
  background-color: white;
  transition: all 0.3s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

input:read-only {
  background-color: #f1f5f9 !important;
  color: #64748b !important;
  cursor: not-allowed;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  color: var(--color-ink);
}

.checkbox-group input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.equipment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  background: rgba(0, 0, 0, 0.02);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .container {
    padding: var(--space-4) var(--space-2);
  }

  .header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
  }
  
  .header > div {
    width: 100%;
  }

  .header-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .header .btn {
    width: 100%;
    text-align: center;
  }

  .form-container, #calendar {
    padding: var(--space-4);
    border-radius: var(--radius-md);
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  .form-row > .form-group {
    min-width: 100%;
  }

  .fc .fc-toolbar {
    flex-direction: column;
    gap: var(--space-4);
  }
  
  .fc .fc-toolbar-title {
    font-size: 1.25rem !important;
    text-align: center;
  }
  
  .fc .fc-button {
    padding: 0.5em 0.75em !important;
    font-size: 0.85rem !important;
  }
  
  .fc-event {
    padding: 2px 4px !important;
    font-size: 0.7rem !important;
  }
  
  .fc-event-title, .fc-event-time {
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }
  
  .fc-daygrid-day-frame {
    min-height: 80px !important;
  }
}