/* ============================================
   🎨 PREMIUM DESIGN SYSTEM 2025
   Flight-Agency V3 Style - Ultra-Premium UI/UX
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

/* ============================================
   DESIGN TOKENS - Premium Light Theme
   Elite Travel Agency - Luxury Aesthetic
   ============================================ */

:root {
    /* === MODERN PREMIUM COLOR PALETTE 2025 === */
    /* Sophisticated, Elegant, World-Class Travel Brand Colors */
    
    /* === Primary Backgrounds - Soft & Elegant === */
    --pure-white: #FFFFFF;
    --bg-primary: #FAFBFC;
    --bg-secondary: #F5F7FA;
    --bg-tertiary: #F0F2F5;
    --bg-accent: #F8F9FA;
    --bg-warm: #FFFBF7;
    
    /* === Primary Colors - Deep & Rich === */
    --deep-blue: #0F172A;
    --deep-blue-dark: #020617;
    --deep-blue-light: #1E293B;
    --navy-blue: #1E40AF;
    --royal-blue: #2563EB;
    --sky-blue: #3B82F6;
    
    /* === Accent Colors - Warm & Luxurious === */
    --royal-gold: #C9A961;
    --gold-light: #E5D4A1;
    --gold-warm: #D4AF37;
    --amber: #F59E0B;
    --amber-light: #FCD34D;
    --terracotta: #DC6B47;
    --terracotta-light: #E89F7A;
    
    /* === Text Colors - High Contrast & Readable === */
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #64748B;
    --text-light: #94A3B8;
    --text-on-dark: #F8FAFC;
    
    /* === Border & Divider Colors === */
    --border-light: #E2E8F0;
    --border-medium: #CBD5E1;
    --border-subtle: rgba(226, 232, 240, 0.5);
    --divider: #E2E8F0;
    
    /* === Glass & Overlay Effects === */
    --glass-white: rgba(255, 255, 255, 0.85);
    --glass-bg: rgba(250, 251, 252, 0.9);
    --glass-border: rgba(15, 23, 42, 0.08);
    
    /* === Status Colors === */
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --error: #EF4444;
    --error-light: #FEE2E2;
    --info: #3B82F6;
    --info-light: #DBEAFE;
    
    /* === Modern Gradient System === */
    --gradient-primary: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #1E40AF 100%);
    --gradient-blue: linear-gradient(135deg, #1E40AF 0%, #2563EB 50%, #3B82F6 100%);
    --gradient-gold: linear-gradient(135deg, #C9A961 0%, #D4AF37 50%, #E5D4A1 100%);
    --gradient-warm: linear-gradient(135deg, #C9A961 0%, #DC6B47 50%, #F59E0B 100%);
    --gradient-blue-gold: linear-gradient(135deg, #1E40AF 0%, #1E3A8A 30%, #2563EB 50%, #C9A961 80%, #D4AF37 100%);
    --gradient-navy-gold: linear-gradient(135deg, #1E40AF 0%, #1E3A8A 25%, #2563EB 50%, #C9A961 75%, #D4AF37 100%);
    --gradient-card: linear-gradient(135deg, #1E40AF 0%, #1E3A8A 30%, #2563EB 50%, #C9A961 80%, #D4AF37 100%);
    --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 30%, #1E40AF 70%, #2563EB 100%);
    --gradient-glass: linear-gradient(135deg, rgba(250, 251, 252, 0.98) 0%, rgba(255, 255, 255, 0.95) 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(250, 251, 252, 0.98) 100%);
    --gradient-soft: linear-gradient(180deg, #FAFBFC 0%, #F5F7FA 100%);
    
    /* === Typography === */
    --font-display: 'Poppins', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Suisse Int\'l', sans-serif;
    
    /* === Glassmorphism - Modern Light Theme === */
    --glass-bg: rgba(250, 251, 252, 0.85);
    --glass-bg-strong: rgba(255, 255, 255, 0.98);
    --glass-border: rgba(15, 23, 42, 0.08);
    --glass-shadow: 0 8px 32px rgba(15, 23, 42, 0.06);
    --glass-blur: blur(24px) saturate(180%);
    
    /* === Modern Shadows - Soft & Elegant === */
    --shadow-soft: 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow-medium: 0 8px 24px rgba(15, 23, 42, 0.08);
    --shadow-deep: 0 16px 48px rgba(15, 23, 42, 0.1);
    --shadow-gold: 0 8px 32px rgba(201, 169, 97, 0.25);
    --shadow-warm: 0 8px 32px rgba(220, 107, 71, 0.2);
    --shadow-glow: 0 0 40px rgba(201, 169, 97, 0.2);
    --shadow-inner: inset 0 2px 4px rgba(15, 23, 42, 0.03);
    --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 12px 40px rgba(15, 23, 42, 0.12);
    --shadow-elevated: 0 20px 60px rgba(15, 23, 42, 0.15);
    
    /* === Spacing - Compact Layout === */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 0.75rem;
    --space-lg: 1rem;
    --space-xl: 1.25rem;
    --space-2xl: 1.5rem;
    --space-3xl: 2rem;
    --space-4xl: 2.5rem;
    --space-5xl: 3rem;
    
    /* Section Padding */
    --section-padding: 2.5rem;
    --section-padding-mobile: 1.5rem;
    
    /* === Transitions - Spring Physics === */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-fast: 0.2s var(--ease-smooth);
    --transition-base: 0.3s var(--ease-smooth);
    --transition-slow: 0.5s var(--ease-smooth);
    --transition-spring: 0.6s var(--ease-spring);
    
    /* === Border Radius - Smooth Rounded === */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;
}

/* ============================================
   DARK MODE AS DEFAULT
   ============================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Subtle background pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 30%, var(--gold-subtle) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(10, 36, 99, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ============================================
   GLASSMORPHISM COMPONENTS
   ============================================ */

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--deep-blue);
}

.glass-card-strong {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-card);
}

.premium-card {
    background: var(--gradient-navy-gold);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: var(--space-lg);
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
    color: var(--text-on-dark);
}

.premium-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--deep-blue);
}

/* ============================================
   TYPOGRAPHY - Premium Styling
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    color: var(--deep-blue);
    line-height: 1.1;
}

h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--deep-blue);
}

h3 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
    color: var(--text-primary);
}

h4 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 600;
}

p {
    font-family: var(--font-body);
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.0625rem;
}

/* ============================================
   PREMIUM BUTTONS
   ============================================ */

.btn-premium {
    font-family: var(--font-display);
    font-weight: 600;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-xl);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-spring);
    font-size: 1rem;
    background: var(--gradient-blue);
    color: var(--pure-white);
    box-shadow: var(--shadow-medium);
}

.btn-premium::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-premium:hover::before {
    width: 300px;
    height: 300px;
}

.btn-premium:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    background: var(--deep-blue-dark);
}

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

.btn-gold {
    background: var(--gradient-gold);
    color: var(--deep-blue);
    box-shadow: var(--shadow-gold);
}

.btn-gold:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    background: var(--gold-light);
}

.btn-glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    box-shadow: var(--glass-shadow);
}

.btn-glass:hover {
    background: var(--glass-bg-strong);
    border-color: var(--deep-blue);
    box-shadow: var(--shadow-card);
    transform: translateY(-2px);
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    position: relative;
    z-index: 1;
}

.container-fluid {
    width: 100%;
    padding: 0 var(--space-md);
}

/* ============================================
   ANIMATIONS - Advanced Motion
   ============================================ */

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

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(212, 175, 55, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(212, 175, 55, 0.6);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.8s var(--ease-smooth);
}

.animate-fadeInScale {
    animation: fadeInScale 0.6s var(--ease-spring);
}

.animate-slideInLeft {
    animation: slideInLeft 0.8s var(--ease-smooth);
}

.animate-slideInRight {
    animation: slideInRight 0.8s var(--ease-smooth);
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-gold {
    color: var(--royal-gold);
}

.text-glow {
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.5);
}

.gradient-text {
    background: var(--gradient-blue-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shimmer-effect {
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
}