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

:root {
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #0f3460;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #ffffff;
    --bg-alt: #f5f7fa;
    --border-color: #e0e0e0;
    --card-hover: #f8f9fc;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-alt);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    background: var(--primary-color);
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-logo {
    color: #fff;
    font-size: 1.25rem;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 8px 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #fff;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 60px 0;
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: 48px;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.page-description {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    display: block;
}

.card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
    line-height: 1.4;
}

.card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.5;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: rgba(255, 255, 255, 0.7);
    padding: 32px 24px;
    text-align: center;
    margin-top: auto;
}

.footer p {
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.footer p:last-child {
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        gap: 16px;
    }

    .nav-menu a {
        font-size: 0.85rem;
    }

    .page-header h1 {
        font-size: 1.75rem;
    }

    .page-description {
        font-size: 1rem;
    }

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

    .main-content {
        padding: 40px 0;
    }
}

@media (max-width: 480px) {
    .nav-logo {
        font-size: 1rem;
    }

    .container {
        padding: 0 16px;
    }

    .card {
        padding: 20px;
    }
}