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

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

:root {
    /* Colors */
    --color-primary: #C8102E;
    --color-primary-dark: #A00D25;
    --color-accent: #FFD700;
    --color-bg: #FFFFFF;
    --color-bg-light: #F5F5F5;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #E0E0E0;
    --color-link: #0066CC;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   Header
   ============================================ */

.header {
    background-color: var(--color-bg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo h1 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    font-weight: 700;
}

.language-switcher {
    display: flex;
    gap: var(--spacing-xs);
}

.lang-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

.lang-btn:hover {
    background: var(--color-bg-light);
}

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

.header-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

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

.nav-link:hover {
    color: var(--color-primary);
}

/* ============================================
   Hero Section (Homepage)
   ============================================ */

.hero {
    text-align: center;
    padding: var(--spacing-lg) 0;
    background: linear-gradient(135deg, #FFF5F5 0%, #FFE0E0 100%);
    width: 100%;
}

.hero-text-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin: 0 auto;
    width: 100%;
    padding: var(--spacing-lg) 0;
}

.hero-text-svg {
    width: 100%;
    height: 250px;
    max-width: 1400px;
    display: block;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-primary);
    margin: 0;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin: 0;
}

@media (max-width: 768px) {
    .hero-text-svg {
        width: 100%;
        height: 200px;
    }
    
    .hero-text-svg text:first-of-type {
        font-size: 36px !important;
        y: 80 !important;
    }
    
    .hero-text-svg text:last-of-type {
        font-size: 18px !important;
        y: 120 !important;
    }
}

/* ============================================
   Cities Section
   ============================================ */

.cities-section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
    position: relative;
    padding-bottom: var(--spacing-md);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--color-primary);
}

.cities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.city-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
    display: block;
    color: inherit;
    text-decoration: none;
}

.city-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.city-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--color-bg-light);
}

.city-card-content {
    padding: var(--spacing-md);
}

.city-card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.city-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.tag {
    display: inline-block;
    padding: 4px var(--spacing-xs);
    background: var(--color-bg-light);
    color: var(--color-text-light);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
}

.tag.history {
    background: #E8F4F8;
    color: #0066CC;
}

.tag.modern {
    background: #F0F8E8;
    color: #4CAF50;
}

.tag.nature {
    background: #FFF3E0;
    color: #FF9800;
}

.city-card-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    width: 100%;
    text-align: center;
}

.city-card-button:hover {
    background: var(--color-primary-dark);
}

/* ============================================
   City Detail Page
   ============================================ */

.city-hero {
    position: relative;
    height: 500px;
    overflow: hidden;
}

.city-hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.city-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.city-hero-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    align-items: flex-end;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
}

.city-hero-content .container {
    padding-bottom: var(--spacing-xl);
}

.city-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.city-subtitle {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
}

.affiliate-cta {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
}

.affiliate-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-decoration: none;
}

.affiliate-button:hover {
    background: var(--color-primary-dark);
}

.affiliate-note {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

/* Side Navigation */
.side-nav {
    position: fixed;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: none; /* Hidden on mobile, shown on desktop */
}

.side-nav-list {
    list-style: none;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
}

.side-nav-list li {
    margin-bottom: var(--spacing-xs);
}

.side-nav-list a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-size: var(--font-size-sm);
}

.side-nav-list a:hover,
.side-nav-list a.active {
    background: var(--color-primary);
    color: white;
}

/* City Main Content */
.city-main {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.content-section {
    margin-bottom: var(--spacing-xxl);
    scroll-margin-top: 100px;
}

/* Attractions Grid */
.attractions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.attraction-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.attraction-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.attraction-image {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
    object-fit: cover;
    background: var(--color-bg-light);
}

.attraction-content {
    padding: var(--spacing-md);
}

.attraction-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.attraction-description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.attraction-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.attraction-info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* Itinerary Cards */
.itinerary-card {
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.itinerary-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.itinerary-day {
    margin-bottom: var(--spacing-md);
}

.itinerary-day-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.itinerary-items {
    list-style: none;
    padding-left: var(--spacing-md);
}

.itinerary-items li {
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: var(--spacing-md);
}

.itinerary-items li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Food Cards */
.food-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.food-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.food-image {
    width: 100%;
    height: auto;
    aspect-ratio: 4/3;
    object-fit: cover;
    background: var(--color-bg-light);
}

.food-content {
    padding: var(--spacing-md);
}

.food-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.food-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* Info Cards */
.info-card {
    background: var(--color-bg-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.info-card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.info-list {
    list-style: none;
}

.info-list li {
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-md);
    position: relative;
}

.info-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

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

.footer {
    background: var(--color-bg-light);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer-text {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

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

@media (min-width: 1024px) {
    .side-nav {
        display: block;
    }
}

@media (max-width: 1023px) {
    .cities-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .attractions-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .cities-grid {
        grid-template-columns: 1fr;
    }
    
    .attractions-grid {
        grid-template-columns: 1fr;
    }
    
    .city-title {
        font-size: var(--font-size-3xl);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .header-nav {
        width: 100%;
        justify-content: space-between;
    }
}

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

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }