/* Modern Cards Theme - Clean & Contemporary */

:root {
    --primary-color: #6366f1;
    --font-family: 'Inter', sans-serif;
    --text-color: #1f2937;
    --text-secondary: #6b7280;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.site-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.logo-image {
    height: 50px;
    width: auto;
    border-radius: 8px;
}

.site-title a {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    background: linear-gradient(135deg, var(--primary-color), #5855eb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-navigation ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.main-navigation a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

.main-navigation a:hover {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

/* Main Content */
.modern-main {
    padding: 3rem 0;
    min-height: calc(100vh - 200px);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
}

.main-content {
    min-height: 400px;
}

.content-card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.content-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card-header {
    padding: 2rem;
    background: linear-gradient(135deg, var(--primary-color), #5855eb);
    color: white;
}

.card-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    text-align: center;
}

.card-body {
    padding: 2rem;
    font-size: 1.125rem;
    line-height: 1.8;
}

.card-body p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.card-body h1,
.card-body h2,
.card-body h3,
.card-body h4,
.card-body h5,
.card-body h6 {
    color: var(--text-color);
    margin: 2rem 0 1rem 0;
    font-weight: 600;
}

.card-body h1 { font-size: 2rem; }
.card-body h2 { font-size: 1.75rem; }
.card-body h3 { font-size: 1.5rem; }
.card-body h4 { font-size: 1.25rem; }
.card-body h5 { font-size: 1.125rem; }
.card-body h6 { font-size: 1rem; }

.card-body a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
    font-weight: 500;
}

.card-body a:hover {
    border-bottom-color: var(--primary-color);
}

.card-footer {
    padding: 1.5rem 2rem;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
}

.card-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.meta-item i {
    color: var(--primary-color);
}

/* Sidebar */
.sidebar-content {
    min-height: 400px;
}

.sidebar {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.sidebar:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.sidebar-widget {
    margin-bottom: 2rem;
}

.sidebar-widget:last-child {
    margin-bottom: 0;
}

.widget-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

/* Footer */
.site-footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
}

.footer-content {
    text-align: center;
    color: var(--text-secondary);
}

/* Error Page */
.error-page {
    text-align: center;
    padding: 4rem 0;
    max-width: 600px;
    margin: 0 auto;
}

.error-page h1 {
    font-size: 4rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 1rem;
    line-height: 1;
}

.error-page p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: #5855eb;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .main-navigation ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .sidebar-content {
        order: -1;
    }
    
    .card-title {
        font-size: 2rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .error-page h1 {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .modern-main {
        padding: 2rem 0;
    }
    
    .card-header,
    .card-body,
    .card-footer {
        padding: 1rem;
    }
    
    .card-title {
        font-size: 1.75rem;
    }
    
    .error-page h1 {
        font-size: 2.5rem;
    }
}

/* Icons */
.icon-calendar::before { content: "📅"; }
.icon-author::before { content: "👤"; }