/* Main Styles for CodeClub */
:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.navbar-brand img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 120px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 16px;
    font-weight: 400;
}

.hero-desc {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* Features Section */
.features-section {
    padding: 80px 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}

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

.feature-icon {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 2rem;
    color: white;
}

.feature-icon.nav { background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%); }
.feature-icon.wiki { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }
.feature-icon.books { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.feature-icon.blog { background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%); }

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Stats Section */
.stats-section {
    background: white;
    padding: 64px 24px;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stats-container {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Recent Posts Section */
.posts-section {
    padding: 80px 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.posts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.posts-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.btn-view-all {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-view-all:hover {
    gap: 12px;
}

.post-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.post-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}

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

.post-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.post-category {
    padding: 4px 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-weight: 500;
}

.post-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.post-excerpt {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.footer {
    background: white;
    border-top: 1px solid var(--border-color);
    padding: 48px 24px 24px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.social-link {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1.125rem;
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-text a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 80px 24px;
    }

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

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .features-grid {
        grid-template-columns: 1fr;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .navbar-nav {
        position: fixed;
        top: 64px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 64px);
        background: white;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 40px;
        gap: 0;
        transition: left 0.3s ease;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .navbar-nav.active {
        left: 0;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 20px;
        font-size: 1.1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .posts-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
}