:root {
    --bg-color: #fdfdfd;
    --text-color: #333333;
    --text-muted: #666666;
    --accent-color: #6a9c78;
    --accent-hover: #527c5e;
    --nav-bg: #ffffff;
    --border-color: #eaeaea;
    --surface-color: #f4f7f6;
}
* { box-sizing: border-box; }
body { font-family: 'Helvetica Neue', Arial, sans-serif; background: var(--bg-color); color: var(--text-color); margin: 0; line-height: 1.7; }
a { color: var(--accent-color); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--accent-hover); }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* Navigation */
header { background: var(--nav-bg); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; }
.nav-inner { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.logo a { font-size: 1.5rem; font-weight: bold; color: var(--text-color); letter-spacing: 0.5px; }
.logo span { color: var(--accent-color); }
.nav-links { display: flex; gap: 30px; }
.nav-links a { color: var(--text-color); font-weight: 500; font-size: 1.05rem; }
.nav-links a:hover { color: var(--accent-color); }
.hamburger { display: none; font-size: 1.8rem; cursor: pointer; background: none; border: none; color: var(--text-color); }

/* Hero */
.hero { text-align: center; padding: 100px 20px; background: var(--surface-color); border-bottom: 1px solid var(--border-color); }
.hero h1 { font-size: 3rem; color: var(--text-color); margin-bottom: 20px; line-height: 1.2; }
.hero p { font-size: 1.2rem; color: var(--text-muted); max-width: 600px; margin: 0 auto 30px; }
.btn { display: inline-block; padding: 14px 32px; background: var(--accent-color); color: #fff; border-radius: 6px; font-weight: bold; font-size: 1.1rem; }
.btn:hover { background: var(--accent-hover); color: #fff; }

/* Grid */
.section-title { text-align: center; font-size: 2rem; margin: 60px 0 40px; }
.article-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 40px; margin-bottom: 80px; }
.article-card { background: #fff; border: 1px solid var(--border-color); border-radius: 12px; overflow: hidden; transition: transform 0.3s, box-shadow 0.3s; }
.article-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.05); }
.article-card img { width: 100%; height: 240px; object-fit: cover; }
.article-card-content { padding: 25px; }
.article-card-content h3 { margin: 0 0 15px; font-size: 1.4rem; line-height: 1.3; }
.article-card-content h3 a { color: var(--text-color); }
.article-card-content h3 a:hover { color: var(--accent-color); }
.article-card-content p { margin: 0 0 20px; color: var(--text-muted); font-size: 0.95rem; }

/* Article specific */
.article-header { text-align: center; padding: 60px 20px; background: var(--surface-color); }
.article-header h1 { max-width: 800px; margin: 0 auto; font-size: 2.5rem; line-height: 1.3; }
.article-body { max-width: 800px; margin: 60px auto; padding: 0 20px; font-size: 1.1rem; }
.article-body h2 { font-size: 1.8rem; margin: 40px 0 20px; color: var(--text-color); }
.article-body h3 { font-size: 1.4rem; margin: 30px 0 15px; }
.article-body p { margin-bottom: 20px; }
.article-body img { width: 100%; border-radius: 12px; margin: 30px 0; }
blockquote { border-left: 5px solid var(--accent-color); padding: 20px 30px; font-style: italic; color: var(--text-muted); background: var(--surface-color); margin: 30px 0; border-radius: 0 12px 12px 0; font-size: 1.2rem; line-height: 1.6; }

/* Contact/About */
.page-content { max-width: 800px; margin: 60px auto; padding: 0 20px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: bold; }
.form-group input, .form-group textarea { width: 100%; padding: 12px; border: 1px solid var(--border-color); border-radius: 6px; font-family: inherit; font-size: 1rem; }
.form-group textarea { resize: vertical; height: 150px; }

/* Footer */
footer { background: var(--nav-bg); border-top: 1px solid var(--border-color); text-align: center; padding: 40px 20px; margin-top: auto; }
footer p { color: var(--text-muted); margin: 0; }

/* Mobile */
@media (max-width: 768px) {
    .nav-links { display: none; flex-direction: column; width: 100%; position: absolute; top: 80px; left: 0; background: var(--nav-bg); border-bottom: 1px solid var(--border-color); padding: 20px 0; box-shadow: 0 10px 10px rgba(0,0,0,0.05); }
    .nav-links.active { display: flex; }
    .nav-links a { padding: 15px 20px; text-align: center; }
    .hamburger { display: block; }
    .hero h1 { font-size: 2.2rem; }
    .article-header h1 { font-size: 2rem; }
}