:root {
    --primary-color: #1e3a8a; /* Deep blue */
    --secondary-color: #3b82f6; /* Soft blue */
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --accent-blue: #60a5fa;
    --max-width: 1100px;
    --radius: 12px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background: var(--bg-gradient);
    min-height: 100vh;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Header & Navigation */
header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.top-banner {
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 8px 0;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

/* Hero Section */
.hero {
    padding: 80px 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    line-height: 1.1;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.hero-content p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.hero-btns {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: #1e40af;
    transform: translateY(-2px);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: rgba(30, 58, 138, 0.05);
}

/* Hero Grid Blocks */
.side-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.grid-block {
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.grid-block h4 {
    font-size: 0.9rem;
    color: var(--primary-color);
}

/* Framework Overview Cards */
.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 2rem;
    color: var(--primary-color);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-4px);
}

.card h3 {
    margin-bottom: 16px;
    color: var(--primary-color);
}

/* Workflow Steps */
.workflow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.step {
    text-align: center;
}

.step-circle {
    width: 48px;
    height: 48px;
    background: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-weight: 700;
}

/* Content Pages */
.content-wrapper {
    background: var(--card-bg);
    max-width: 850px;
    margin: 60px auto;
    padding: 60px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05);
}

.content-wrapper h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.content-wrapper h2 {
    font-size: 1.6rem;
    color: var(--primary-color);
    margin-top: 40px;
    margin-bottom: 16px;
}

.content-wrapper p, .content-wrapper ul {
    margin-bottom: 20px;
    color: var(--text-main);
}

.content-wrapper ul {
    padding-left: 24px;
}

.content-wrapper blockquote {
    border-left: 4px solid var(--accent-blue);
    padding: 20px;
    background: #f8fafc;
    font-style: italic;
    margin: 30px 0;
}

.last-updated {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Forms */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
}

.form-group textarea {
    height: 160px;
}

/* Footer */
footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 80px 0 40px;
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
    margin-bottom: 60px;
}

.footer-col h4 {
    color: white;
    margin-bottom: 24px;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid #1e293b;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }
    .hero-content {
        text-align: center;
    }
    .hero-btns {
        justify-content: center;
    }
    .hero-content h1 {
        font-size: 2.2rem;
    }
    .content-wrapper {
        padding: 40px 24px;
        margin: 40px 16px;
    }
}