/* ============================================
   MODERN RESPONSIVE BOOKING WEBSITE
   Optimized for Mobile & Desktop
   ============================================ */

/* --- CSS Variables (Theme) --- */
:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary-color: #ec4899;
  --accent-color: #f59e0b;
  --success-color: #10b981;
  --danger-color: #ef4444;
  
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --bg-dark: #1e293b;
  
  --text-dark: #1e293b;
  --text-muted: #64748b;
  --text-light: #f1f5f9;
  
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-smooth: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

h3 {
  font-size: 1.25rem;
}

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

a {
  text-decoration: none;
  color: inherit;
}

/* --- Navigation Bar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-white);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  height: 70px;
}

.navbar-brand h2 {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
  font-size: 1.5rem;
}

.navbar-menu {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width var(--transition-normal);
}

.nav-link:hover::after {
  width: 100%;
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--text-light);
  padding: 4rem 1rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3rem;
  margin-bottom: 1rem;
  animation: slideInDown 0.8s ease;
}

.hero-subtitle {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  animation: slideInUp 0.8s ease;
  letter-spacing: 2px;
}

.hero-description {
  font-size: 1rem;
  margin-bottom: 2rem;
  opacity: 0.95;
  animation: slideInUp 1s ease;
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Buttons --- */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-block;
  text-align: center;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transition: left var(--transition-normal);
  z-index: -1;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: var(--text-light);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

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

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

.btn-service {
  background: var(--primary-color);
  color: white;
  width: 100%;
  margin-top: 1rem;
}

.btn-service:hover {
  background: var(--primary-dark);
}

.btn-submit {
  width: 100%;
  margin-top: 1.5rem;
}

/* --- Services Section --- */
.services-section {
  padding: 4rem 1rem;
  background: var(--bg-light);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-header h2 {
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-muted);
}

.service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--bg-white);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
  transform-origin: left;
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.service-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: inline-block;
}

.service-card h3 {
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.service-duration {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.service-details {
  margin: 1rem 0;
}

.service-description {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0;
}

.service-price {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 1rem 0;
}

/* --- Booking Section --- */
.booking-section {
  padding: 4rem 1rem;
  background: var(--bg-white);
}

.booking-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
}

.booking-content h2 {
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.booking-content > p {
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

/* --- Form Styles --- */
.booking-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-normal);
  background: var(--bg-light);
  color: var(--text-dark);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  background: var(--bg-white);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
  font-family: 'Inter', sans-serif;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.service-display {
  padding: 1rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 2px dashed var(--primary-color);
}

.service-name {
  font-weight: 600;
  color: var(--text-dark);
}

.service-price-badge {
  background: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.9rem;
}

.error-message {
  color: var(--danger-color);
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: none;
}

.error-message.show {
  display: block;
}

/* --- Booking Summary --- */
.booking-summary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: var(--text-light);
  padding: 2rem;
  border-radius: 12px;
  height: fit-content;
  position: sticky;
  top: 100px;
}

.booking-summary h3 {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.summary-item:last-child {
  border-bottom: none;
}

.summary-item strong {
  font-weight: 700;
  color: var(--text-light);
}

.summary-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
  margin: 1rem 0;
}

.summary-item.total {
  font-size: 1.2rem;
  padding: 1rem 0;
  margin-top: 0.5rem;
}

/* --- Modal Styles --- */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: var(--bg-white);
  padding: 3rem;
  border-radius: 12px;
  text-align: center;
  max-width: 500px;
  box-shadow: var(--shadow-xl);
  animation: slideUp 0.4s ease;
}

.modal-success-icon {
  font-size: 3rem;
  color: var(--success-color);
  margin-bottom: 1rem;
  animation: bounce 0.6s ease;
}

.modal-content h2 {
  color: var(--text-dark);
  margin-bottom: 1rem;
}

.modal-content p {
  margin-bottom: 0.5rem;
}

.modal-details {
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes bounce {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
}

/* --- Footer --- */
.footer {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 2rem 1rem;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.footer p {
  margin: 0;
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ============================================
   RESPONSIVE DESIGN - TABLET
   ============================================ */
@media (min-width: 768px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.2rem;
  }

  .hero-title {
    font-size: 3.5rem;
  }

  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .booking-wrapper {
    grid-template-columns: 1fr 350px;
  }
}

/* ============================================
   RESPONSIVE DESIGN - DESKTOP
   ============================================ */
@media (min-width: 1024px) {
  .hero {
    padding: 5rem 1rem;
  }

  .services-section {
    padding: 5rem 1rem;
  }

  .booking-section {
    padding: 5rem 1rem;
  }

  .service-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .booking-wrapper {
    grid-template-columns: 1fr 380px;
  }

  .navbar-menu {
    gap: 3rem;
  }
}

/* ============================================
   PERFORMANCE OPTIMIZATIONS
   ============================================ */

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-light: #0f172a;
    --bg-white: #1e293b;
    --text-dark: #f1f5f9;
    --text-muted: #cbd5e1;
  }

  input, textarea {
    background: #334155;
  }
}

/* High DPI screens */
@media (min-resolution: 192dpi) {
  body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}

/* --- Print Styles --- */
@media print {
  .navbar, .footer, .btn-submit {
    display: none;
  }

  .booking-summary {
    position: static;
    margin-top: 2rem;
  }
}