/* ========================================
   Modern Airbnb-Style Design System
   ======================================== */

:root {
    /* Color Palette - Airbnb Inspired */
    --primary-color: #FF385C;
    --primary-dark: #E61E4D;
    --primary-light: #FF5A5F;
    --secondary-color: #00A699;
    --accent-color: #FC642D;
    
    /* Neutral Colors */
    --text-primary: #222222;
    --text-secondary: #717171;
    --text-light: #B0B0B0;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F7F7F7;
    --bg-light: #FAFAFA;
    --border-color: #DDDDDD;
    --border-light: #EBEBEB;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.08);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.12);
    --shadow-lg: 0 6px 16px rgba(0,0,0,0.12);
    --shadow-xl: 0 10px 30px rgba(0,0,0,0.15);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.15);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 50%;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    
    /* Typography */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Paytone One', 'Poppins', sans-serif;
    
    --text-xs: 12px;
    --text-sm: 14px;
    --text-base: 16px;
    --text-lg: 18px;
    --text-xl: 20px;
    --text-2xl: 24px;
    --text-3xl: 30px;
    --text-4xl: 36px;
    --text-5xl: 48px;
    --text-6xl: 60px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ========================================
   Global Reset & Base Styles
   ======================================== */

* {
    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-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

body.loaded {
    animation: fadeIn 0.3s ease-in;
}

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

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-color);
}

/* ========================================
   Navigation Bar - Modern & Sticky
   ======================================== */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    background: var(--bg-primary);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
    padding: var(--space-lg) var(--space-2xl);
}

nav.scrolled {
    background: var(--bg-primary);
    border-bottom-color: var(--border-light);
    box-shadow: var(--shadow-sm);
    padding: var(--space-md) var(--space-2xl);
}

nav.scroll-down {
    transform: translateY(-100%);
}

nav.scroll-up {
    transform: translateY(0);
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    height: 40px;
    width: auto;
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.05);
}

.navbar {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
}

.navbar li {
    display: inline-block;
}

.navbar a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    position: relative;
}

.navbar a:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.navbar a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(12px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-12px);
}

/* ========================================
   Hero Section - Full Screen
   ======================================== */

.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.3) 0%,
        rgba(0, 0, 0, 0.5) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 900px;
    padding: var(--space-2xl);
    animation: fadeInUp 0.8s ease-out;
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.5rem);
    margin-bottom: var(--space-2xl);
    color: rgba(255, 255, 255, 0.95);
    font-weight: 400;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.2);
}

/* ========================================
   Search Bar - Modern & Interactive
   ======================================== */

.search-container {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-md);
    box-shadow: var(--shadow-xl);
    max-width: 850px;
    margin: 0 auto;
    animation: slideUp 0.6s ease-out 0.3s both;
}

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

.search-form {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1.5fr 1fr;
    gap: var(--space-sm);
    align-items: end;
}

.search-group {
    position: relative;
}

.search-group label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.search-input {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-family: var(--font-primary);
    transition: all var(--transition-fast);
    background: var(--bg-light);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 56, 92, 0.1);
}

.search-input::placeholder {
    color: var(--text-light);
}

.search-btn {
    width: 100%;
    padding: var(--space-md);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.search-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

/* Price Range Slider */
.price-range-container {
    width: 100%;
}

.price-range {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(
        to right,
        var(--primary-light) 0%,
        var(--primary-light) 50%,
        var(--border-light) 50%,
        var(--border-light) 100%
    );
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}

.price-range::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.price-range::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: var(--shadow-lg);
}

.price-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    border: none;
}

.price-display {
    display: inline-block;
    font-weight: 600;
    color: var(--primary-color);
    font-size: var(--text-lg);
}

/* ========================================
   Cards - Modern Card Design
   ======================================== */

.card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
    border: 1px solid var(--border-light);
    opacity: 0;
    transform: translateY(20px);
}

.card.animate-in {
    animation: cardFadeIn 0.5s ease-out forwards;
}

@keyframes cardFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.card-image-container {
    position: relative;
    width: 100%;
    padding-top: 66.67%; /* 3:2 Aspect Ratio */
    overflow: hidden;
    background: var(--bg-secondary);
}

.card-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card:hover .card-image {
    transform: scale(1.05);
}

.card-badge {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    background: white;
    color: var(--text-primary);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    box-shadow: var(--shadow-md);
    z-index: 2;
}

.favorite-btn {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 2;
}

.favorite-btn:hover {
    background: white;
    transform: scale(1.1);
}

.favorite-btn.active {
    color: var(--primary-color);
}

.favorite-btn i {
    font-size: var(--text-lg);
}

.card-content {
    padding: var(--space-lg);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--space-md);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: 600;
    margin: 0 0 var(--space-xs);
    color: var(--text-primary);
}

.card-subtitle {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin: 0;
}

.card-rating {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-sm);
}

.rating-star {
    color: #FFB400;
}

.card-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-light);
}

.card-price {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.card-price-amount {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--text-primary);
}

.card-price-unit {
    font-size: var(--text-sm);
    font-weight: 400;
    color: var(--text-secondary);
}

/* ========================================
   Grid Layouts
   ======================================== */

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-2xl);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1200px) {
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: var(--text-base);
    font-weight: 600;
    font-family: var(--font-primary);
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

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

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

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

.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--text-lg);
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   Footer
   ======================================== */

footer {
    background: var(--text-primary);
    color: white;
    padding: var(--space-3xl) var(--space-2xl) var(--space-xl);
    margin-top: var(--space-3xl);
}

.footer-container {
    max-width: 1440px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.footer-section h4 {
    color: white;
    margin-bottom: var(--space-lg);
    font-size: var(--text-lg);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-md);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    :root {
        --text-5xl: 40px;
        --text-4xl: 32px;
        --text-3xl: 26px;
    }
    
    nav {
        padding: var(--space-md) var(--space-lg);
    }
    
    .container {
        padding: var(--space-2xl) var(--space-lg);
    }
    
    .search-form {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .navbar {
        position: fixed;
        top: 80px;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        align-items: flex-start;
        padding: var(--space-xl);
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-base);
        gap: var(--space-lg);
    }
    
    .navbar.active {
        right: 0;
    }
    
    .navbar a {
        width: 100%;
        padding: var(--space-md);
    }
    
    .hero {
        height: 80vh;
        min-height: 500px;
    }
    
    .hero-content {
        padding: var(--space-lg);
    }
    
    .search-container {
        margin: var(--space-lg);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 480px) {
    :root {
        --text-5xl: 32px;
        --text-4xl: 26px;
        --text-3xl: 22px;
        --space-2xl: 32px;
        --space-3xl: 48px;
    }
    
    .container {
        padding: var(--space-xl) var(--space-md);
    }
    
    .card-content {
        padding: var(--space-md);
    }
}

/* ========================================
   Utility Classes
   ======================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden { display: none; }
.show { display: block; }

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

.loading {
    animation: spin 1s linear infinite;
}

/* Notification/Toast */
.notification {
    position: fixed;
    top: var(--space-xl);
    right: var(--space-xl);
    background: white;
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-tooltip);
    transform: translateX(400px);
    transition: transform var(--transition-base);
    max-width: 400px;
}

.notification.show {
    transform: translateX(0);
}

.notification-success {
    border-left: 4px solid #00C853;
}

.notification-error {
    border-left: 4px solid #FF5252;
}

.notification-info {
    border-left: 4px solid #2196F3;
}