/* =========================================
   1. CSS Variables & Reset
   ========================================= */
:root {
    --primary-color: #2563eb;       /* Trustworthy Blue */
    --primary-dark: #1d4ed8;        /* Darker Blue for hover */
    --accent-color: #059669;        /* Professional Green for CTAs */
    --accent-hover: #047857;        /* Darker Green for hover */
    --bg-body: #f8fafc;             /* Very light slate background */
    --bg-card: #ffffff;             /* Pure white for cards */
    --text-main: #334155;           /* Slate 700 for main text */
    --text-heading: #0f172a;        /* Slate 900 for headings */
    --text-muted: #64748b;          /* Slate 500 for secondary text */
    --border-color: #e2e8f0;        /* Light border */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 12px;
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.2s ease;
    font-weight: 500;
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
    text-underline-offset: 3px;
}

ul, ol {
    margin-left: 24px;
    margin-bottom: 24px;
    padding-left: 10px;
}

li {
    margin-bottom: 12px;
}

/* =========================================
   2. Layout & Container
   ========================================= */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

/* =========================================
   3. Header & Navigation
   ========================================= */
.site-header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 16px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: -0.5px;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 32px;
    margin: 0;
}

.nav-links li a {
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
}

.nav-links li a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.btn-nav {
    background-color: var(--primary-color);
    color: white !important;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none !important;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn-nav:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2.5px;
    background-color: var(--text-heading);
    margin: 5px 0;
    border-radius: 2px;
    transition: 0.3s;
}

/* =========================================
   4. Hero Section
   ========================================= */
.hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    color: white;
    padding: 100px 0 120px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at top right, rgba(37, 99, 235, 0.2), transparent 40%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.15;
    letter-spacing: -1px;
    color: #ffffff;
}

.hero p {
    font-size: 1.25rem;
    margin: 0 auto 36px auto;
    color: #cbd5e1;
    line-height: 1.6;
    max-width: 650px;
}

.btn-primary {
    display: inline-block;
    background-color: var(--accent-color);
    color: white !important;
    padding: 16px 36px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.1rem;
    text-decoration: none !important;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px rgba(5, 150, 105, 0.4);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(5, 150, 105, 0.5);
    text-decoration: none;
}

/* =========================================
   5. Article Content
   ========================================= */
.article-body {
    background-color: var(--bg-card);
    margin-top: -60px; /* Overlap hero slightly for modern look */
    margin-bottom: 60px;
    padding: 60px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 10;
}

.article-body h2 {
    color: var(--text-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-top: 48px;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
    line-height: 1.3;
}

.article-body h2:first-of-type {
    margin-top: 0;
}

.article-body h3 {
    color: var(--text-heading);
    font-size: 1.4rem;
    font-weight: 600;
    margin-top: 36px;
    margin-bottom: 16px;
    letter-spacing: -0.3px;
}

.article-body p {
    margin-bottom: 24px;
    font-size: 1.05rem;
    color: var(--text-main);
}

.article-body a {
    color: var(--primary-color);
    font-weight: 600;
    border-bottom: 1px dashed var(--primary-color);
    text-decoration: none;
}

.article-body a:hover {
    border-bottom-style: solid;
    color: var(--primary-dark);
}

/* =========================================
   6. FAQ Section
   ========================================= */
.faq-section {
    margin-top: 48px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background-color: #f8fafc;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    padding: 24px;
    border-radius: 0 var(--radius) var(--radius) 0;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.faq-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 1.15rem;
    color: var(--text-heading);
}

.faq-item p {
    margin-bottom: 0;
    font-size: 1rem;
    color: var(--text-muted);
}

/* =========================================
   7. Contact Section
   ========================================= */
.contact-section {
    background-color: var(--bg-body);
    padding: 40px 0 80px;
    text-align: center;
}

.contact-card {
    background: var(--bg-card);
    max-width: 650px;
    margin: 0 auto;
    padding: 48px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.contact-card h2 {
    color: var(--text-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-card > p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.contact-details {
    margin: 32px 0;
    text-align: left;
    display: inline-block;
    width: 100%;
    max-width: 400px;
}

.detail-item {
    margin-bottom: 20px;
    font-size: 1.05rem;
    display: flex;
    flex-direction: column;
}

.detail-item strong {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
    font-weight: 600;
}

.detail-item a, .detail-item span {
    color: var(--text-heading);
    font-weight: 600;
    font-size: 1.15rem;
    text-decoration: none;
}

.detail-item a:hover {
    color: var(--primary-color);
}

.btn-large {
    padding: 18px 48px;
    font-size: 1.15rem;
    margin-top: 16px;
}

/* =========================================
   8. Footer
   ========================================= */
footer {
    background-color: var(--text-heading);
    color: #94a3b8;
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-content p {
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.footer-content p:last-child {
    margin-bottom: 0;
}

/* =========================================
   9. Responsive Design
   ========================================= */
@media (max-width: 900px) {
    .article-body {
        padding: 40px 30px;
        margin-top: -40px;
    }
    
    .hero h1 {
        font-size: 2.4rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: white;
        position: absolute;
        top: 100%;
        left: 0;
        padding: 24px;
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--border-color);
        gap: 20px;
    }

    .nav-links.active {
        display: flex;
    }

    .hamburger {
        display: block;
    }

    .hero {
        padding: 60px 0 80px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .article-body {
        padding: 30px 20px;
        margin-top: -30px;
    }

    .article-body h2 {
        font-size: 1.6rem;
    }

    .contact-card {
        padding: 30px 20px;
    }
    
    .btn-large {
        width: 100%;
        text-align: center;
    }
}