@layer components;

:root {
  --booking-purple: #667eea;
  --booking-purple-dark: #764ba2;
  --booking-gold: #fbbf24;
  --booking-input: hsla(0, 0%, 100%, 0.2);
  --booking-input-focus: hsla(38, 100%, 60%, 0.8);
  --booking-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

/* Mobile-First Booking Section */
.booking-section {
  background: linear-gradient(135deg, var(--booking-purple) 0%, var(--booking-purple-dark) 100%);
  padding: clamp(3rem, 10vw, 5rem) clamp(1.5rem, 5vw, 3rem);
  position: relative;
  overflow: hidden;
  scroll-margin-top: 5rem;
  isolation: isolate;
}

/* Grain Texture Overlay */
.booking-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 25% 25%, hsla(0,0%,100%,0.1) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, hsla(0,0%,100%,0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
}

/* Booking Hero Banner */
.booking-hero {
  background: hsla(0,0%,100%,0.12);
  backdrop-filter: blur(20px);
  border-radius: clamp(1.5rem, 6vw, 2rem);
  border: 1px solid hsla(0,0%,100%,0.25);
  padding: clamp(2rem, 6vw, 3rem);
  margin-bottom: clamp(2.5rem, 7vw, 3rem);
  text-align: center;
  position: relative;
  z-index: 2;
}

.booking-content h2 {
  font-size: clamp(2rem, 7vw, 2.5rem);
  background: linear-gradient(135deg, white, hsl(200,100%,95%));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0 0 clamp(0.75rem, 2vw, 1rem);
  font-weight: 800;
  letter-spacing: -0.025em;
}

.booking-content p {
  color: hsla(0,0%,100%,0.95);
  font-size: clamp(1rem, 3vw, 1.15rem);
  margin: 0;
  font-weight: 500;
}

/* Booking Form Wrapper */
.booking-form-wrapper {
  max-width: min(95vw, 800px);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.booking-form {
  background: hsla(0,0%,100%,0.18);
  backdrop-filter: blur(25px);
  border-radius: clamp(1.5rem, 6vw, 2rem);
  border: 1px solid hsla(0,0%,100%,0.35);
  padding: clamp(2rem, 6vw, 2.5rem);
  box-shadow: var(--booking-shadow);
  position: relative;
  overflow: hidden;
}

.booking-form::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 30%, hsla(0,0%,100%,0.03) 50%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Form Grid - Mobile Stacked */
.form-row {
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 3vw, 1.5rem);
  margin-bottom: clamp(1.5rem, 4vw, 2rem);
}

@media (min-width: 480px) {
  .form-row {
    flex-direction: row;
  }
  
  .form-group {
    flex: 1;
  }
}

/* Form Group */
.form-group {
  position: relative;
  z-index: 1;
}

.form-group label {
  display: block;
  margin-bottom: clamp(0.5rem, 1.5vw, 0.75rem);
  color: hsla(0,0%,100%,0.98);
  font-weight: 600;
  font-size: clamp(0.9rem, 2.2vw, 0.95rem);
  transition: color 0.3s ease;
}

/* Touch-Friendly Inputs */
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  min-height: clamp(3rem, 4.5vw, 3.5rem); /* 44px+ touch target */
  padding: clamp(0.875rem, 2.5vw, 1rem) clamp(2.75rem, 6vw, 3rem) clamp(0.875rem, 2.5vw, 1rem) clamp(1rem, 3vw, 1.25rem);
  background: var(--booking-input);
  border: 1px solid hsla(0,0%,100%,0.35);
  border-radius: clamp(0.75rem, 3vw, 1rem);
  color: hsl(0,0%,100%);
  font-size: clamp(1rem, 2.8vw, 1rem);
  font-family: inherit;
  backdrop-filter: blur(12px);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  appearance: none;
  -webkit-appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: hsla(0,0%,100%,0.65);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  background: hsla(0,0%,100%,0.3);
  border-color: var(--booking-input-focus);
  box-shadow: 
    0 0 0 clamp(2px, 0.5vw, 3px) rgba(251, 191, 36, 0.25),
    var(--booking-shadow);
  transform: translateY(-0.125rem);
}

/* Input Icons */
.input-icon {
  position: absolute;
  left: clamp(1rem, 3vw, 1.25rem);
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(1.1rem, 3vw, 1.25rem);
  color: hsla(0,0%,100%,0.7);
  pointer-events: none;
  z-index: 2;
  transition: color 0.3s ease;
}

.form-group:focus-within .input-icon {
  color: var(--booking-gold);
}

/* Select Styling */
.form-group select {
  background-image: 
    linear-gradient(45deg, transparent 50%, hsla(0,0%,100%,0.3) 50%),
    linear-gradient(135deg, hsla(0,0%,100%,0.3) 50%, transparent 50%);
  background-position: 
    calc(100% - 1.25rem) calc(1em + 0.25rem),
    calc(100% - 0.75rem) calc(1em + 0.25rem);
  background-size: 0.5rem 0.5rem, 0.5rem 0.5rem;
  background-repeat: no-repeat;
  cursor: pointer;
}

/* Textarea */
.form-group textarea {
  resize: vertical;
  min-height: 5rem;
}

/* Submit Button - Hero Style */
.submit-btn {
  position: relative;
  z-index: 3;
  width: 100%;
  background: linear-gradient(135deg, var(--booking-gold), #f59e0b);
  color: #111827;
  border: none;
  padding: clamp(1.125rem, 3.5vw, 1.25rem) clamp(2rem, 6vw, 2.5rem);
  border-radius: 3rem;
  font-size: clamp(1.05rem, 3vw, 1.1rem);
  font-weight: 800;
  cursor: pointer;
  transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.75rem, 2vw, 1rem);
  box-shadow: 0 12px 35px rgba(251, 191, 36, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-height: 3.75rem;
  position: relative;
  overflow: hidden;
}

.submit-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, hsla(0,0%,100%,0.3), transparent);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.submit-btn:hover::before,
.submit-btn:focus-visible::before {
  opacity: 1;
}

.submit-btn:hover,
.submit-btn:focus-visible {
  transform: translateY(-0.375rem) scale(1.02);
  box-shadow: 0 25px 50px rgba(251, 191, 36, 0.7);
}

.submit-btn svg {
  width: clamp(1.1rem, 3vw, 1.25rem);
  height: clamp(1.1rem, 3vw, 1.25rem);
  flex-shrink: 0;
}

/* Error States */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
  border-color: hsla(4, 90%, 65%, 0.8);
  background: hsla(4, 90%, 95%, 0.3);
  box-shadow: 0 0 0 3px hsla(4, 90%, 65%, 0.2);
}

.form-group.error label {
  color: hsl(4, 90%, 55%);
}

/* Loading State */
.submit-btn.loading {
  pointer-events: none;
}

.submit-btn.loading::after {
  content: '';
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid hsla(0,0%,100%,0.3);
  border-top-color: #111827;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-left: 0.75rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Responsive Enhancements */
@media (min-width: 768px) {
  .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(1.25rem, 3vw, 1.5rem);
  }
}

@media (min-width: 1024px) {
  .booking-hero {
    max-width: 50rem;
    margin-left: auto;
    margin-right: auto;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .booking-form,
  .form-group input,
  .submit-btn {
    transition: none;
  }
}

@media (prefers-contrast: high) {
  .booking-form,
  .booking-hero {
    border: 2px solid;
  }
  
  .form-group input,
  .form-group select,
  .form-group textarea {
    border-width: 2px;
  }
}

/* Focus Management */
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.submit-btn:focus-visible {
  outline: 3px solid var(--booking-gold);
  outline-offset: 2px;
}