/**
 * TatilPro World-Class Theme System
 * 
 * This file defines the complete design system for TatilPro theme
 * following world-class standards and best practices.
 * 
 * Standards followed:
 * - WCAG 2.1 AA accessibility
 * - Modern CSS custom properties
 * - Responsive design principles
 * - Consistent spacing and typography scales
 */

/* ============================================
   ROOT VARIABLES - Design Tokens
   ============================================ */

:root {
  /* ============================================
     TYPOGRAPHY SYSTEM
     ============================================ */
  
  /* Font Families */
  --font-primary: 'Geist', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'Geist', 'Inter', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  
  /* Font Sizes - Type Scale (Major Third: 1.25) */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 2.8125rem;   /* 45px */
  --text-6xl: 3.5rem;      /* 56px */
  
  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;
  
  /* ============================================
     COLOR SYSTEM - Villa Page Standard
     ============================================ */
  
  /* Primary Brand Colors */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;
  
  /* Secondary Colors (Navy) */
  --color-secondary-50: #f8fafc;
  --color-secondary-100: #f1f5f9;
  --color-secondary-200: #e2e8f0;
  --color-secondary-300: #cbd5e1;
  --color-secondary-400: #94a3b8;
  --color-secondary-500: #64748b;
  --color-secondary-600: #475569;
  --color-secondary-700: #334155;
  --color-secondary-800: #1e293b;
  --color-secondary-900: #0f172a;
  
  /* Accent Colors */
  --color-accent-green: #28c2a6;
  --color-accent-green-dark: #1fa088;
  --color-accent-yellow: #ffc107;
  --color-accent-yellow-dark: #ffb300;
  --color-accent-red: #ed0925;
  --color-accent-red-dark: #c7081f;
  --color-accent-orange: #ff6b35;
  --color-accent-orange-dark: #e55a2b;
  
  /* Semantic Colors */
  --color-success: #38c172;
  --color-success-light: #d4edda;
  --color-warning: #ffc107;
  --color-warning-light: #fff3cd;
  --color-error: #e3342f;
  --color-error-light: #f8d7da;
  --color-info: #3b82f6;
  --color-info-light: #d1ecf1;
  
  /* Neutral Colors (Grayscale) */
  --color-neutral-50: #f9fafb;
  --color-neutral-100: #f3f4f6;
  --color-neutral-200: #e5e7eb;
  --color-neutral-300: #d1d5db;
  --color-neutral-400: #9ca3af;
  --color-neutral-500: #6b7280;
  --color-neutral-600: #4b5563;
  --color-neutral-700: #374151;
  --color-neutral-800: #1f2937;
  --color-neutral-900: #111827;
  
  /* Text Colors */
  --color-text-primary: #1a2b48;
  --color-text-secondary: #5e6d77;
  --color-text-muted: #6b7280;
  --color-text-light: #9ca3af;
  --color-text-white: #ffffff;
  --color-text-inverse: #ffffff;
  
  /* Background Colors */
  --color-bg-white: #ffffff;
  --color-bg-light: #f3f4f6;
  --color-bg-lighter: #f7fafc;
  --color-bg-gray: #e5e7eb;
  --color-bg-dark: #1a2b48;
  
  /* Border Colors */
  --color-border-light: #e0e0e0;
  --color-border-base: #d7dce3;
  --color-border-gray: #d1d5db;
  --color-border-dark: #dfdfdf;
  --color-border-primary: #3b82f6;
  
  /* Interactive States */
  --color-hover: #3b82f6;
  --color-hover-dark: #2563eb;
  --color-focus: #0066CC;
  --color-active: #1d4ed8;
  --color-disabled: #cbd5e0;
  --color-disabled-text: #9ca3af;
  
  /* ============================================
     SPACING SYSTEM - 4px Base Unit
     ============================================ */
  
  --spacing-0: 0;
  --spacing-1: 0.25rem;    /* 4px */
  --spacing-2: 0.5rem;      /* 8px */
  --spacing-3: 0.75rem;     /* 12px */
  --spacing-4: 1rem;        /* 16px */
  --spacing-5: 1.25rem;     /* 20px */
  --spacing-6: 1.5rem;      /* 24px */
  --spacing-8: 2rem;        /* 32px */
  --spacing-10: 2.5rem;     /* 40px */
  --spacing-12: 3rem;       /* 48px */
  --spacing-16: 4rem;       /* 64px */
  --spacing-20: 5rem;       /* 80px */
  --spacing-24: 6rem;       /* 96px */
  --spacing-32: 8rem;       /* 128px */
  
  /* ============================================
     BORDER RADIUS SYSTEM
     ============================================ */
  
  --radius-none: 0;
  --radius-sm: 0.25rem;     /* 4px */
  --radius-base: 0.5rem;     /* 8px */
  --radius-md: 0.75rem;      /* 12px */
  --radius-lg: 1rem;         /* 16px */
  --radius-xl: 1.5rem;       /* 24px */
  --radius-2xl: 2rem;         /* 32px */
  --radius-full: 9999px;
  
  /* ============================================
     SHADOW SYSTEM
     ============================================ */
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  --shadow-none: none;
  
  /* Colored Shadows */
  --shadow-primary: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
  --shadow-primary-lg: 0 10px 15px -3px rgba(59, 130, 246, 0.4);
  
  /* ============================================
     Z-INDEX SYSTEM
     ============================================ */
  
  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* ============================================
     TRANSITION SYSTEM
     ============================================ */
  
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  --transition-slower: 500ms ease-in-out;
  
  /* ============================================
     BREAKPOINTS (for media queries)
     ============================================ */
  
  --breakpoint-xs: 475px;
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
  
  /* Special breakpoints for optimization */
  --breakpoint-1366: 1366px;
  --breakpoint-1920: 1920px;
  
  /* ============================================
     CONTAINER MAX-WIDTHS
     ============================================ */
  
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
  --container-1366: 1280px;
  --container-1920: 1536px;
  
  /* ============================================
     LAYOUT
     ============================================ */
  
  --header-height: 80px;
  --header-height-mobile: 64px;
  --footer-height: auto;
  --sidebar-width: 320px;
  
  /* ============================================
     GRID SYSTEM
     ============================================ */
  
  --grid-columns: 12;
  --grid-gap-sm: 1rem;
  --grid-gap-md: 1.5rem;
  --grid-gap-lg: 2rem;
  
  /* ============================================
     OPACITY
     ============================================ */
  
  --opacity-0: 0;
  --opacity-25: 0.25;
  --opacity-50: 0.5;
  --opacity-75: 0.75;
  --opacity-100: 1;
}

/* ============================================
   DARK MODE (Future Support)
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark mode colors can be added here */
    /* Currently keeping light mode as default */
  }
}

/* ============================================
   BASE TYPOGRAPHY
   ============================================ */

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ============================================
   HEADINGS - Consistent Typography
   ============================================ */

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-top: 0;
  margin-bottom: var(--spacing-4);
  letter-spacing: var(--tracking-tight);
}

h1, .h1 {
  font-size: var(--text-5xl);
  font-weight: var(--font-extrabold);
  letter-spacing: var(--tracking-tighter);
  line-height: var(--leading-tight);
}

h2, .h2 {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-tight);
}

h3, .h3 {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
}

h4, .h4 {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
}

h5, .h5 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
}

h6, .h6 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

/* Responsive Heading Sizes */
@media (max-width: 768px) {
  h1, .h1 { font-size: var(--text-4xl); }
  h2, .h2 { font-size: var(--text-3xl); }
  h3, .h3 { font-size: var(--text-2xl); }
  h4, .h4 { font-size: var(--text-xl); }
  h5, .h5 { font-size: var(--text-lg); }
  h6, .h6 { font-size: var(--text-base); }
}

/* ============================================
   TEXT UTILITIES
   ============================================ */

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-light { color: var(--color-text-light); }
.text-white { color: var(--color-text-white); }

.text-primary-color { color: var(--color-primary-600); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-info { color: var(--color-info); }

/* ============================================
   BACKGROUND UTILITIES
   ============================================ */

.bg-white { background-color: var(--color-bg-white); }
.bg-light { background-color: var(--color-bg-light); }
.bg-lighter { background-color: var(--color-bg-lighter); }
.bg-gray { background-color: var(--color-bg-gray); }
.bg-dark { background-color: var(--color-bg-dark); }

.bg-primary { background-color: var(--color-primary-600); }
.bg-primary-light { background-color: var(--color-primary-100); }
.bg-secondary { background-color: var(--color-secondary-800); }

/* ============================================
   BORDER UTILITIES
   ============================================ */

.border { border-width: 1px; border-style: solid; border-color: var(--color-border-base); }
.border-light { border-color: var(--color-border-light); }
.border-gray { border-color: var(--color-border-gray); }
.border-primary { border-color: var(--color-border-primary); }

.rounded { border-radius: var(--radius-base); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* ============================================
   SHADOW UTILITIES
   ============================================ */

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-base); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-none { box-shadow: var(--shadow-none); }

.shadow-primary { box-shadow: var(--shadow-primary); }
.shadow-primary-lg { box-shadow: var(--shadow-primary-lg); }

/* ============================================
   SPACING UTILITIES
   ============================================ */

.p-0 { padding: var(--spacing-0); }
.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-5 { padding: var(--spacing-5); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.m-0 { margin: var(--spacing-0); }
.m-1 { margin: var(--spacing-1); }
.m-2 { margin: var(--spacing-2); }
.m-3 { margin: var(--spacing-3); }
.m-4 { margin: var(--spacing-4); }
.m-5 { margin: var(--spacing-5); }
.m-6 { margin: var(--spacing-6); }
.m-8 { margin: var(--spacing-8); }

/* ============================================
   BUTTON SYSTEM
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3) var(--spacing-6);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: var(--leading-normal);
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.btn-primary {
  background: linear-gradient(to right, var(--color-primary-500), var(--color-primary-600));
  color: var(--color-text-white);
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  background: linear-gradient(to right, var(--color-primary-600), var(--color-primary-700));
  box-shadow: var(--shadow-primary-lg);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--color-secondary-800);
  color: var(--color-text-white);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-900);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--color-primary-600);
  color: var(--color-primary-600);
}

.btn-outline:hover {
  background-color: var(--color-primary-600);
  color: var(--color-text-white);
}

.btn:disabled {
  background-color: var(--color-disabled);
  color: var(--color-disabled-text);
  cursor: not-allowed;
  opacity: var(--opacity-50);
}

/* ============================================
   CARD SYSTEM
   ============================================ */

.card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border-base);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-base);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-primary-400);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--spacing-6);
  border-bottom: 1px solid var(--color-border-light);
}

.card-body {
  padding: var(--spacing-6);
}

.card-footer {
  padding: var(--spacing-6);
  border-top: 1px solid var(--color-border-light);
  background-color: var(--color-bg-lighter);
}

/* ============================================
   FORM SYSTEM
   ============================================ */

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="date"],
input[type="time"],
select,
textarea {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border-base);
  border-radius: var(--radius-base);
  transition: all var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

input:disabled,
select:disabled,
textarea:disabled {
  background-color: var(--color-bg-light);
  color: var(--color-disabled-text);
  cursor: not-allowed;
}

/* ============================================
   CONTAINER SYSTEM
   ============================================ */

.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

@media (min-width: 640px) {
  .container { max-width: var(--container-sm); }
}

@media (min-width: 768px) {
  .container { max-width: var(--container-md); }
}

@media (min-width: 1024px) {
  .container { max-width: var(--container-lg); }
}

@media (min-width: 1280px) {
  .container { max-width: var(--container-xl); }
}

@media (min-width: 1366px) {
  .container { 
    max-width: var(--container-1366);
    padding-left: var(--spacing-8);
    padding-right: var(--spacing-8);
  }
}

@media (min-width: 1920px) {
  .container { 
    max-width: var(--container-1920);
    padding-left: var(--spacing-12);
    padding-right: var(--spacing-12);
  }
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */

@media (max-width: 767px) {
  .mobile-hidden { display: none !important; }
}

@media (min-width: 768px) {
  .mobile-only { display: none !important; }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.focus-visible:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

@keyframes slideIn {
  from { 
    transform: translateY(-10px); 
    opacity: 0; 
  }
  to { 
    transform: translateY(0); 
    opacity: 1; 
  }
}

@keyframes scaleIn {
  from { 
    transform: scale(0.95); 
    opacity: 0; 
  }
  to { 
    transform: scale(1); 
    opacity: 1; 
  }
}

.animate-fade-in {
  animation: fadeIn var(--transition-slow) ease-out;
}

.animate-slide-in {
  animation: slideIn var(--transition-slow) ease-out;
}

.animate-scale-in {
  animation: scaleIn var(--transition-base) ease-out;
}

/* ============================================
   LINE CLAMP UTILITIES
   ============================================ */

.line-clamp-1 {
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.line-clamp-2 {
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.line-clamp-3 {
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */

.scrollbar-thin {
  scrollbar-width: thin;
  scrollbar-color: var(--color-neutral-400) transparent;
}

.scrollbar-thin::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

.scrollbar-thin::-webkit-scrollbar-track {
  background: transparent;
}

.scrollbar-thin::-webkit-scrollbar-thumb {
  background-color: var(--color-neutral-400);
  border-radius: 3px;
}

.scrollbar-thin::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-neutral-500);
}