/* === Global Styles === */
:root {
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --secondary: #fbbf24;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f3f4f6;
    --border: #e5e7eb;
    --white: #ffffff;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

/* === Container === */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* === Header === */
.header {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
    text-decoration: none;
    transition: color 0.2s;
    min-height: 44px;
    display: flex;
    align-items: center;
}

.logo-text:hover {
    color: var(--primary-light);
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    font-size: 0.95rem;
    min-height: 44px;
    display: flex;
    align-items: center;
}

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

/* === Hero Section === */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, #1e40af 100%);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero .lead {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    min-height: 44px;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: #f59e0b;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--secondary);
}

.btn-secondary:hover {
    background: rgba(251, 191, 36, 0.1);
    transform: translateY(-2px);
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* === Content Sections === */
.content-section {
    padding: 4rem 0;
}

.content-section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.content-section h3 {
    font-size: 1.3rem;
    margin: 1.5rem 0 1rem 0;
    color: var(--text-dark);
}

.content-section p {
    margin-bottom: 1rem;
    color: var(--text-light);
    line-height: 1.7;
}

.content-section ul {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.content-section li {
    margin-bottom: 0.75rem;
    color: var(--text-light);
    line-height: 1.7;
}

.bg-light {
    background-color: var(--bg-light);
}

.bg-cta {
    background: linear-gradient(135deg, var(--primary) 0%, #1e40af 100%);
    color: var(--white);
    text-align: center;
}

.bg-cta h2 {
    color: var(--white);
}

.bg-cta p {
    color: rgba(255, 255, 255, 0.9);
}

/* === Requirements List === */
.requirements-list {
    list-style: none;
    margin-left: 0;
}

.requirements-list li {
    padding-left: 0;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.requirements-list li:last-child {
    border-bottom: none;
}

.requirements-list strong {
    color: var(--primary);
}

/* === Comparison Table === */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: var(--white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border-radius: 0.5rem;
    overflow: hidden;
}

.comparison-table th {
    background: var(--primary);
    color: var(--white);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-light);
}

.comparison-table tbody tr:hover {
    background-color: var(--bg-light);
}

/* === Variants Grid === */
.variants-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.variant-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1.5rem;
    transition: all 0.2s;
}

.variant-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.variant-card h3 {
    color: var(--primary);
    margin-top: 0;
}

.variant-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* === Download Section === */
.download-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.download-card {
    background: var(--white);
    border: 2px solid var(--border);
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.2s;
}

.download-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.15);
}

.download-card h3 {
    color: var(--primary);
    margin-top: 0;
    margin-bottom: 0.75rem;
}

.download-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* === FAQ === */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.faq-item {
    background: var(--bg-light);
    border-left: 4px solid var(--primary);
    padding: 1.5rem;
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.faq-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.faq-item h3 {
    color: var(--primary);
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.faq-item p {
    color: var(--text-light);
    margin: 0;
    line-height: 1.7;
}

/* === Footer === */
.footer {
    background: var(--primary);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

.footer a {
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.footer a:hover {
    color: var(--white);
}

.footer p {
    margin: 0.5rem 0;
    opacity: 0.95;
}

/* === Mobile Responsive === */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 1.75rem;
    }

    .hero .lead {
        font-size: 1rem;
    }

    .content-section h2 {
        font-size: 1.5rem;
    }

    .content-section {
        padding: 2.5rem 0;
    }

    .nav ul {
        gap: 1rem;
    }

    .nav a {
        font-size: 0.85rem;
    }

    .comparison-table {
        font-size: 0.9rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.75rem;
    }

    .variants-grid {
        grid-template-columns: 1fr;
    }

    .download-section {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        min-height: 48px;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px;
    }

    .hero {
        padding: 2rem 0;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero .lead {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }

    .content-section {
        padding: 2rem 0;
    }

    .content-section h2 {
        font-size: 1.3rem;
    }

    .content-section h3 {
        font-size: 1.1rem;
    }

    .header .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav ul {
        width: 100%;
        flex-direction: column;
        gap: 0.5rem;
    }

    .nav a {
        padding: 0.75rem 0;
    }

    .logo-text {
        font-size: 1.25rem;
    }

    .btn {
        width: 100%;
        padding: 0.875rem 1rem;
        min-height: 48px;
    }

    .requirements-list li {
        margin-bottom: 0.75rem;
        padding-bottom: 0.75rem;
    }

    table {
        font-size: 0.85rem;
    }
}

/* === Accessibility === */
a:focus,
button:focus,
input:focus {
    outline: 2px solid var(--secondary);
    outline-offset: 2px;
}

/* === Print === */
@media print {
    .header,
    .footer,
    .cta-buttons,
    .bg-cta {
        display: none;
    }

    .content-section {
        padding: 0 0 2rem 0;
    }

    body {
        color: #000;
    }
}