/* =========================================
   1. Variables & Reset
   ========================================= */
:root {
    /* Color Palette: Deep Navy & Warm Amber */
    --primary: #0f172a;       /* Deep Navy */
    --secondary: #334155;     /* Slate */
    --accent: #f59e0b;        /* Warm Amber */
    --accent-hover: #d97706;  /* Darker Amber */
    --bg-light: #f8fafc;      /* Very Light Grey */
    --bg-white: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    
    --font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --container-width: 1100px;
    --header-height: 70px;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-main);
    background-color: var(--bg-light);
    line-height: 1.7;
}

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

ul {
    list-style: none;
}

/* =========================================
   2. Layout & Utilities
   ========================================= */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--bg-white);
    color: var(--bg-white);
}

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

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* =========================================
   3. Header
   ========================================= */
.site-header {
    background-color: var(--primary);
    color: var(--bg-white);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bg-white);
}

.logo span {
    color: var(--accent);
}

.main-nav ul {
    display: flex;
    gap: 30px;
    align-items: center;
}

.main-nav a {
    font-weight: 500;
}

.main-nav a:hover {
    color: var(--accent);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--bg-white);
    border-radius: 2px;
    transition: 0.3s;
}

/* =========================================
   4. Hero Section
   ========================================= */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, #1e293b 100%);
    color: var(--bg-white);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Abstract CSS Shape for visual interest without images */
.hero::after {
    content: '';
    position: absolute;
    bottom: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.25rem;
    color: #cbd5e1;
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* =========================================
   5. Article Content
   ========================================= */
.content-area {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.article-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.lead {
    font-size: 1.2rem;
    color: var(--secondary);
    margin-bottom: 30px;
    font-weight: 500;
    border-left: 4px solid var(--accent);
    padding-left: 20px;
}

.article-wrapper h2 {
    color: var(--primary);
    font-size: 1.8rem;
    margin-top: 50px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border);
}

.article-wrapper p {
    margin-bottom: 20px;
}

.text-link {
    color: var(--accent);
    font-weight: 600;
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

.text-link:hover {
    color: var(--accent-hover);
}

.check-list {
    margin: 20px 0 30px 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.check-list li {
    position: relative;
    padding-left: 30px;
    background-color: var(--bg-light);
    padding: 15px 15px 15px 40px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: transform 0.2s ease;
}

.check-list li:hover {
    transform: translateX(5px);
    border-color: var(--accent);
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 15px;
    color: var(--accent);
    font-weight: bold;
}

/* =========================================
   6. Contact Section
   ========================================= */
.contact-section {
    background-color: var(--bg-light);
    padding: 80px 0;
    border-top: 1px solid var(--border);
}

.contact-header {
    text-align: center;
    margin-bottom: 50px;
}

.contact-header h2 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.contact-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.contact-card {
    background: var(--bg-white);
    padding: 40px 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
    border-top: 4px solid transparent;
}

.contact-card:hover {
    transform: translateY(-10px);
    border-top-color: var(--accent);
}

.icon-circle {
    width: 60px;
    height: 60px;
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.contact-card h3 {
    margin-bottom: 10px;
    color: var(--primary);
}

.contact-card a, .contact-card p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.contact-card a:hover {
    color: var(--accent);
}

.contact-cta {
    text-align: center;
}

/* =========================================
   7. Footer
   ========================================= */
.site-footer {
    background-color: var(--primary);
    color: #94a3b8;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    color: var(--bg-white);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.footer-links h4, .footer-info h4 {
    color: var(--bg-white);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #334155;
    font-size: 0.9rem;
}

/* =========================================
   8. Animations
   ========================================= */
.fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================
   9. Responsive Design
   ========================================= */
@media (max-width: 768px) {
    .mobile-toggle {
        display: flex;
    }

    .main-nav {
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--primary);
        padding: 20px;
        transform: translateY(-150%);
        transition: transform 0.3s ease-in-out;
        box-shadow: 0 10px 10px rgba(0,0,0,0.1);
    }

    .main-nav.active {
        transform: translateY(0);
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .check-list {
        grid-template-columns: 1fr;
    }
}