:root {
    --primary: #3b82f6;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --accent: #2563eb;
    --text: #1f2937;
    --text-light: #4b5563;
    --bg: #ffffff;
    --bg-alt: #f3f4f6;
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', system-ui, sans-serif; }
body { color: var(--text); background: var(--bg); line-height: 1.6; }
a { text-decoration: none; color: var(--primary); transition: 0.3s; }
a:hover { color: var(--primary-dark); }

/* Header */
.site-header {
    position: sticky; top: 0; z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.header-inner { display: flex; justify-content: space-between; align-items: center; }
.logo-container { display: flex; align-items: center; gap: 15px; }
.logo-container img { width: 50px; height: 50px; object-fit: contain; border-radius: 8px; }
.logo-container h1 { font-size: 1.5rem; color: var(--text); font-weight: 700; margin: 0; line-height: 1.2; }
.main-nav ul { display: flex; gap: 20px; list-style: none; }
.main-nav a { color: var(--text); font-weight: 600; padding: 5px 0; }
.main-nav a:hover { color: var(--primary); }

/* Hero Parallax */
.hero-parallax {
    height: 80vh; min-height: 500px;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}
.hero-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(29,78,216,0.9) 0%, rgba(59,130,246,0.9) 100%);
}
.hero-content { position: relative; z-index: 10; color: white; max-width: 800px; padding: 0 20px; }
.hero-content h2 { font-size: 3rem; margin-bottom: 20px; font-weight: 800; line-height: 1.2; text-shadow: 0 2px 10px rgba(0,0,0,0.3); }
.hero-content p { font-size: 1.2rem; margin-bottom: 30px; opacity: 0.9; }

/* Overlapping Cards */
.services-overlap {
    margin-top: -80px; position: relative; z-index: 20;
    padding-bottom: 80px;
}
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.service-card {
    background: white; padding: 40px 30px;
    border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid var(--primary);
}
.service-card:hover { transform: translateY(-5px); box-shadow: 0 15px 40px rgba(0,0,0,0.12); }
.service-card h3 { font-size: 1.3rem; margin-bottom: 15px; color: var(--primary-dark); }

/* Core Focus */
.core-focus { padding: 80px 0; background: var(--bg-alt); text-align: center; }
.section-title { font-size: 2rem; margin-bottom: 50px; color: var(--text); position: relative; display: inline-block; }
.section-title::after { content: ''; position: absolute; bottom: -10px; left: 50%; transform: translateX(-50%); width: 60px; height: 3px; background: var(--primary); }
.focus-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.focus-item { padding: 30px; background: white; border-radius: 12px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
.focus-icon { width: 60px; height: 60px; background: var(--primary-light); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 24px; font-weight: bold; }
@media (max-width: 900px) { .focus-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .focus-grid { grid-template-columns: 1fr; } }

/* Articles Section */
.articles-section { padding: 80px 0; }
.articles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 30px; }
.article-card { background: white; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 15px rgba(0,0,0,0.05); transition: 0.3s; border: 1px solid #e5e7eb; }
.article-card:hover { transform: translateY(-5px); box-shadow: 0 10px 25px rgba(0,0,0,0.1); }
.article-card-content { padding: 25px; }
.article-card h3 { font-size: 1.2rem; margin-bottom: 10px; line-height: 1.4; }
.article-card h3 a { color: var(--text); }
.article-card h3 a:hover { color: var(--primary); }
.article-meta { font-size: 0.9rem; color: var(--text-light); margin-bottom: 15px; }

/* Article Detail */
.article-detail { padding: 60px 0; max-width: 800px; margin: 0 auto; }
.article-header { text-align: center; margin-bottom: 40px; }
.article-header h1 { font-size: 2.5rem; margin-bottom: 20px; line-height: 1.3; }
.article-body h2 { margin: 30px 0 15px; color: var(--primary-dark); }
.article-body p { margin-bottom: 20px; font-size: 1.1rem; }
.article-body ul { margin-bottom: 20px; padding-left: 20px; }
.article-body li { margin-bottom: 10px; font-size: 1.1rem; }

/* Author Box */
.author-box { display: flex; gap: 20px; align-items: center; background: var(--bg-alt); padding: 30px; border-radius: 12px; margin-top: 50px; border-left: 4px solid var(--primary); }
.author-avatar { width: 80px; height: 80px; border-radius: 50%; background: var(--primary-light); display: flex; align-items: center; justify-content: center; font-size: 2rem; color: var(--primary); font-weight: bold; flex-shrink: 0; }
.author-info h4 { margin-bottom: 8px; font-size: 1.2rem; color: var(--primary-dark); }
.author-info p { margin: 0; font-size: 0.95rem; color: var(--text-light); }

/* Footer */
.site-footer { background: #111827; color: #9ca3af; padding: 60px 0 30px; margin-top: 60px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; margin-bottom: 40px; }
.footer-col h4 { color: white; font-size: 1.2rem; margin-bottom: 20px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #9ca3af; }
.footer-links a:hover { color: white; }
.footer-bottom { text-align: center; padding-top: 30px; border-top: 1px solid #374151; font-size: 0.9rem; }