:root {
    --bg-color: #0b0f19;
    --card-bg: #151c2e;
    --card-border: #232d42;
    --primary: #00f2fe;
    --secondary: #4facfe;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --accent: #10b981;
}

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

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Header & Nav */
header {
    background-color: rgba(21, 28, 46, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
}

.logo-brand img {
    width: 38px;
    height: 38px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

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

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

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 1.5rem 3rem;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.75rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
}

/* Main Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

/* Grid Layout */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.card-date {
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.card h2 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    color: #ffffff;
    line-height: 1.4;
}

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

.read-more {
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

/* Article Page Layout */
.article-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2.5rem;
}

.article-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 1.5rem;
}

.article-header h1 {
    font-size: 2.2rem;
    color: #ffffff;
    margin-bottom: 0.75rem;
}

.article-meta {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
}

.article-content p {
    margin-bottom: 1.25rem;
    color: var(--text-main);
    font-size: 1.05rem;
}

.article-content h3 {
    color: #ffffff;
    margin: 1.75rem 0 0.75rem;
    font-size: 1.4rem;
}

.article-content ul, .article-content ol {
    margin: 1rem 0 1.5rem 1.5rem;
    color: var(--text-main);
}

.article-content li {
    margin-bottom: 0.5rem;
}

.back-link {
    display: inline-block;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

/* Footer */
footer {
    border-top: 1px solid var(--card-border);
    padding: 2.5rem 1.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

footer a:hover {
    color: var(--primary);
}