:root {
    --primary: #111827;          /* Deep Midnight Slate */
    --accent: #2563eb;           /* Electric Royal Blue */
    --accent-hover: #1d4ed8;     /* Deep Active Blue */
    --bg-main: #f9fafb;          /* Pure Off-White Tint */
    --bg-card: #ffffff;          /* True Stark White Canvas */
    --border-color: #e5e7eb;     /* Fine Silver Rule Line */
    --text-main: #1f2937;        /* Dark Charcoal Body Font */
    --text-muted: #4b5563;       /* Balanced Gray Meta Details */
    --text-light: #9ca3af;       /* Secondary Footer Copy */
    --max-width: 1100px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { background-color: var(--bg-main); color: var(--text-main); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; line-height: 1.7; -webkit-font-smoothing: antialiased; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; }

.site-header { background-color: var(--primary); padding: 1.5rem 0; position: sticky; top: 0; z-index: 100; }
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo { color: #ffffff; font-weight: 700; font-size: 1.35rem; text-decoration: none; letter-spacing: -0.025em; }
.nav-links a { color: var(--text-light); text-decoration: none; font-size: 0.95rem; font-weight: 500; }

.hero-section { padding: 5rem 0 3.5rem 0; max-width: 800px; }
.hero-section h1 { color: var(--primary); font-size: 2.75rem; line-height: 1.2; font-weight: 800; letter-spacing: -0.04em; margin-bottom: 1.5rem; }
.hero-section p { color: var(--text-muted); font-size: 1.25rem; }

.asymmetric-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; margin-bottom: 4rem; }
.card { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 6px; padding: 2.5rem; }
.card-featured { grid-column: 1 / 2; }
.card-tag { color: var(--accent); font-size: 0.8rem; font-weight: 700; text-transform: uppercase; margin-bottom: 1rem; display: block; }
.card h2 { color: var(--primary); font-size: 2.25rem; font-weight: 700; line-height: 1.3; margin-bottom: 1rem; }
.card p { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 1.5rem; }
.card-meta { color: var(--text-light); font-size: 0.85rem; }

.sidebar-block { background-color: var(--primary); color: #ffffff; border-radius: 6px; padding: 2rem; }
.sidebar-block h3 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.sidebar-block p { color: var(--text-light); font-size: 0.9rem; margin-bottom: 1.25rem; }
.pdf-list { list-style: none; }
.pdf-list a { color: #ffffff; text-decoration: none; font-size: 0.9rem; border-bottom: 1px solid rgba(255,255,255,0.2); }

.newsletter-box { background-color: #ffffff; border: 1px solid var(--border-color); border-radius: 6px; padding: 3rem; margin-bottom: 6rem; max-width: 800px; }
.newsletter-box h2 { color: var(--primary); font-size: 1.75rem; margin-bottom: 0.5rem; }
.newsletter-box p { color: var(--text-muted); margin-bottom: 1.5rem; }
.newsletter-form { display: flex; gap: 1rem; }
input[type="email"] { flex: 1; padding: 0.75rem 1rem; border: 1px solid var(--border-color); border-radius: 4px; font-size: 1rem; }

.btn { background-color: var(--accent); color: #ffffff; border: none; border-radius: 4px; padding: 0.75rem 1.5rem; font-weight: 600; cursor: pointer; }
.btn:hover { background-color: var(--accent-hover); }
.btn-secondary { background-color: transparent; color: var(--text-muted); border: 1px solid var(--border-color); border-radius: 4px; padding: 0.75rem 1.5rem; cursor: pointer; }

.site-footer { background-color: var(--primary); color: var(--text-light); padding: 3rem 0; font-size: 0.9rem; margin-top: 4rem; }

.gdpr-banner { position: fixed; bottom: 0; left: 0; right: 0; background-color: #ffffff; border-top: 1px solid var(--border-color); padding: 1.5rem 0; box-shadow: 0 -4px 10px rgba(0,0,0,0.05); z-index: 1000; display: none; }
.gdpr-container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; display: flex; justify-content: space-between; align-items: center; }
.gdpr-buttons { display: flex; gap: 1rem; }

@media (max-width: 900px) {
    .asymmetric-grid { grid-template-columns: 1fr; }
    .newsletter-form { flex-direction: column; }
    .gdpr-container { flex-direction: column; align-items: flex-start; gap: 1rem; }
}