/* CSS Design System for Vlog Minh Hải - Football Theme */
:root {
    /* Football Theme Colors */
    --primary: #1B5E20;
    /* Deep grass green */
    --primary-light: #2E7D32;
    /* Bright green */
    --primary-op-10: rgba(46, 125, 50, 0.1);
    --accent: #FFD700;
    /* Gold */
    --accent-hover: #FFC107;
    /* Amber */
    --dark: #0D1117;
    /* Dark background */
    --dark-card: #161B22;
    /* Card background */
    --dark-card-hover: #21262d;
    --text: #E6EDF3;
    /* Light text */
    --text-muted: #8B949E;
    /* Muted text */
    --border: #30363d;
    /* Border color */

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Transitions */
    --transition: all 0.3s ease;
}

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

body {
    background-color: var(--dark);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

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

/* Header & Nav */
header {
    background-color: rgba(13, 17, 23, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-links a {
    color: var(--text);
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
}

.lang-switch {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    margin-top: 80px;
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    background: radial-gradient(circle at 70% 30%, rgba(46, 125, 50, 0.2) 0%, rgba(13, 17, 23, 0) 70%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-text h1 {
    font-size: 4rem;
    background: linear-gradient(to right, #fff, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-sm);
}

.hero-text .subtitle {
    font-size: 1.5rem;
    color: var(--primary-light);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.hero-text .bio {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    max-width: 600px;
    /* Increased from default/implicit */
    border-radius: 20px;
    border: 3px solid var(--accent);
    /* Slightly thicker border */
    box-shadow: 0 0 40px rgba(255, 215, 0, 0.2);
    /* Enhanced glow */
    margin: 0 auto;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary-light);
    color: white;
    box-shadow: 0 4px 15px rgba(46, 125, 50, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(46, 125, 50, 0.6);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
}

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

/* Section Styles */
section {
    padding: var(--spacing-lg) 0;
}

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

.section-title {
    font-size: 2.5rem;
    color: var(--text);
    position: relative;
    padding-left: 15px;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 30px;
    width: 5px;
    background: var(--accent);
    border-radius: 2px;
}

/* Cards Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.card {
    background-color: var(--dark-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    background-color: var(--dark-card-hover);
    border-color: var(--primary-light);
}

.card-image {
    height: 180px;
    background-color: #2b3137;
    position: relative;
    overflow: hidden;
}

.card-image img {
    height: 100%;
    width: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

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

.card-tag {
    display: inline-block;
    padding: 2px 8px;
    background: var(--primary-op-10);
    color: var(--primary-light);
    border-radius: 4px;
    font-size: 0.8rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text);
}

.card-excerpt {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    padding-top: var(--spacing-sm);
    margin-top: auto;
}

/* Predictions Section */
.match-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--dark-card);
    padding: var(--spacing-sm);
    border-radius: 10px;
    border: 1px solid var(--border);
    margin-bottom: var(--spacing-sm);
}

.team {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 40%;
}

.team-logo {
    width: 40px;
    height: 40px;
    background: #2b3137;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.team.home {
    flex-direction: row-reverse;
    text-align: right;
}

.vs {
    width: 20%;
    text-align: center;
    font-weight: bold;
    color: var(--accent);
    font-size: 1.2rem;
}

.prediction-badge {
    background: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-top: 5px;
    display: inline-block;
}

/* Social Media Section */
.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px;
    background: var(--dark-card);
    border-radius: 12px;
    width: 150px;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.social-item:hover {
    background: var(--dark-card-hover);
    transform: translateY(-5px);
    border-color: var(--accent);
}

.social-icon {
    font-size: 2rem;
    color: var(--text);
}

.social-name {
    font-weight: 600;
}

/* Footer */
footer {
    background: var(--dark-card);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--text-muted);
}

.footer-links a:hover {
    color: var(--accent);
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .nav-links {
        display: none;
        /* Add JS hamburger menu later */
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}