:root {
    --primary: #2c3e50;
    --accent: #3498db;
    --bg-color: #f8f9fa;
    --text-color: #333;
    --footer-bg: #1a252f;
    --white: #ffffff;
    --border: #e9ecef;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

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

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col-8 {
    width: 66.66%;
    padding: 0 15px;
}

.col-4 {
    width: 33.33%;
    padding: 0 15px;
}

.col-12 {
    width: 100%;
    padding: 0 15px;
}

/* Header */
header {
    background: var(--white);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
}

.logo span {
    color: var(--accent);
}

.search-box form {
    display: flex;
}

.search-box input {
    padding: 8px 15px;
    border: 1px solid var(--border);
    border-radius: 4px 0 0 4px;
    outline: none;
}

.search-box button {
    background: var(--accent);
    color: var(--white);
    border: none;
    padding: 8px 15px;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}

/* Nav */
nav {
    border-top: 1px solid var(--border);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li a {
    display: block;
    padding: 12px 20px;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
}

nav ul li a:hover,
nav ul li a.active {
    background: var(--accent);
    color: var(--white);
}

/* Main Content */
main {
    padding: 30px 0;
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    border-left: 5px solid var(--accent);
    padding-left: 10px;
    margin-bottom: 20px;
    color: var(--primary);
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-img {
    height: 200px;
    object-fit: cover;
    width: 100%;
}

.card-body {
    padding: 15px;
}

.card-cat {
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    display: block;
    margin-bottom: 5px;
}

.card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.4;
}

.card-meta {
    font-size: 12px;
    color: #999;
    display: flex;
    justify-content: space-between;
}

/* Detail */
.article-header h1 {
    font-size: 32px;
    margin-bottom: 15px;
    color: var(--primary);
}

.article-meta {
    margin-bottom: 20px;
    color: #666;
    font-size: 14px;
}

.featured-image {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 20px;
}

.article-content {
    font-size: 18px;
    line-height: 1.8;
    color: #444;
}

.article-content p {
    margin-bottom: 15px;
}

/* Sidebar */
.widget {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.widget-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 10px;
}

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

.mini-list li {
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.mini-list li:last-child {
    border: none;
    margin: 0;
    padding: 0;
}

.mini-link {
    font-weight: 600;
    font-size: 14px;
    display: block;
}

.ad-space {
    background: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    margin-bottom: 20px;
}

/* Form */
.form-group {
    margin-bottom: 15px;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
}

.btn {
    background: var(--accent);
    color: var(--white);
    padding: 12px 25px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
}

/* Footer */
footer {
    background: var(--footer-bg);
    color: #ecf0f1;
    padding: 40px 0 20px;
    margin-top: 40px;
}

.footer-cols {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.footer-col {
    flex: 1;
    padding: 0 15px;
    min-width: 250px;
}

.footer-col h3 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-copy {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    font-size: 13px;
    color: #95a5a6;
}

/* Responsive */
@media (max-width: 768px) {

    .col-8,
    .col-4 {
        width: 100%;
    }

    .top-bar {
        flex-direction: column;
        gap: 15px;
    }

    nav ul {
        overflow-x: auto;
        white-space: nowrap;
    }

    .footer-col {
        margin-bottom: 30px;
    }
}