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

:root {
    --primary: #005C97;
    --primary-dark: #004a7c;
    --primary-light: #e6f0f7;
    --text: #1e293b;
    --text-secondary: #64748b;
    --background: #ffffff;
    --background-alt: #f8fafc;
    --border: #e2e8f0;
    --success: #10b981;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --radius-lg: 16px;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

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

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

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(to bottom, var(--primary-light), var(--background));
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 92, 151, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text);
}

.hero-text {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(0, 92, 151, 0.3);
}

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

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

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Features */
.features {
    padding: 100px 0;
    background: var(--background);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: box-shadow 0.3s, transform 0.3s;
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-light);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--primary);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
}

/* Download Section */
.download {
    padding: 100px 0;
    background: #0f172a;
    color: white;
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 32px 32px;
    opacity: 0.5;
}

.download-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.download-content h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.download-content > p {
    font-size: 1.125rem;
    color: #94a3b8;
    margin-bottom: 32px;
}

.download-steps {
    list-style: none;
    margin-bottom: 32px;
}

.download-steps li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: #e2e8f0;
}

.step-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.step-icon svg {
    width: 100%;
    height: 100%;
    stroke: #3b82f6;
}

.download-note {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 20px;
    font-size: 0.875rem;
    color: #94a3b8;
}

.download-note strong {
    color: white;
}

.download-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    color: var(--text);
    box-shadow: var(--shadow-lg);
    transform: rotate(2deg);
    transition: transform 0.5s;
}

.download-card:hover {
    transform: rotate(0deg);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
}

.card-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

.card-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
}

.card-header span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.card-status {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.status-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--background-alt);
    border-radius: var(--radius);
}

.status-badge {
    background: #dcfce7;
    color: #166534;
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Info Section */
.info {
    padding: 100px 0;
    background: var(--background-alt);
}

.info-content {
    max-width: 800px;
    margin: 0 auto;
}

.info-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.info-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 32px 0 16px;
}

.info-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 1.125rem;
}

.info-content ul {
    margin-left: 24px;
    color: var(--text-secondary);
}

.info-content li {
    margin-bottom: 12px;
}

.info-content strong {
    color: var(--text);
}

/* Page Hero */
.page-hero {
    padding: 140px 0 60px;
    background: #0f172a;
    color: white;
    text-align: center;
}

.page-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.page-hero p {
    font-size: 1.25rem;
    color: #94a3b8;
}

/* About Content */
.about-content {
    padding: 80px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 60px;
}

.about-section {
    margin-bottom: 40px;
}

.about-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.about-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.about-section p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.7;
}

.about-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 40px;
}

.about-card {
    padding: 24px;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.about-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.about-card-icon.blue {
    background: var(--primary-light);
}

.about-card-icon.blue svg {
    stroke: var(--primary);
}

.about-card-icon.teal {
    background: #ccfbf1;
}

.about-card-icon.teal svg {
    stroke: #0d9488;
}

.about-card-icon svg {
    width: 24px;
    height: 24px;
}

.about-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.about-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.compatibility-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.compatibility-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.compatibility-list svg {
    width: 18px;
    height: 18px;
    stroke: var(--text-secondary);
}

/* Sidebar */
.about-sidebar {
    position: sticky;
    top: 100px;
}

.specs-card {
    background: var(--background-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.specs-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.specs-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.spec-item {
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.spec-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.spec-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.spec-value {
    font-weight: 500;
    font-size: 1.125rem;
}

.specs-footer {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.specs-footer-header {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.specs-footer-header svg {
    width: 24px;
    height: 24px;
    stroke: var(--primary);
}

.specs-footer p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Policy Content */
.policy-content {
    padding: 80px 0;
}

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

.policy-article h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 40px 0 16px;
}

.policy-article h2:first-child {
    margin-top: 0;
}

.policy-article h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 24px 0 12px;
}

.policy-article p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.policy-article ul {
    margin: 0 0 16px 24px;
    color: var(--text-secondary);
}

.policy-article li {
    margin-bottom: 8px;
}

/* Footer */
.footer {
    background: #0f172a;
    color: white;
    padding: 60px 0;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 24px;
}

.footer-logo .logo-icon {
    width: 28px;
    height: 28px;
    stroke: white;
}

.footer-links {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-copyright {
    color: #64748b;
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    .download-card {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: 20px;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero h1 {
        font-size: 2.25rem;
    }
    
    .hero-text {
        font-size: 1rem;
    }
    
    .features,
    .download,
    .info {
        padding: 60px 0;
    }
    
    .section-header h2,
    .download-content h2,
    .info-content h2 {
        font-size: 1.75rem;
    }
    
    .about-cards {
        grid-template-columns: 1fr;
    }
    
    .compatibility-list {
        grid-template-columns: 1fr;
    }
    
    .page-hero h1 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 12px;
    }
}