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

:root {
    --bg-primary: #000000;
    --bg-secondary: #0b0b0b;
    --bg-card: #1a1a1a;
    --border-color: #1f2937;
    --border-light: #374151;
    --text-primary: #ffffff;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --warning: #f59e0b;
    --danger: #ef4444;
    --success: #10b981;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    line-height: 1.6;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

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

/* Header */
.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    width: 48px;
    height: 48px;
    border-radius: 12px;
}

.logo-section h1 {
    color: var(--text-primary);
    font-size: 24px;
    font-weight: 700;
}

.nav {
    display: flex;
    gap: 24px;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
    align-items: center;
}

.hero-title {
    color: var(--text-primary);
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 20px;
}

.hero-subtitle strong {
    color: var(--accent-primary);
}

.hero-description {
    color: var(--text-muted);
    font-size: 16px;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-icon {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.3);
}

/* Features Section */
.features {
    padding: 80px 0;
}

.section-title {
    color: var(--text-primary);
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h3 {
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 14px;
}

/* Safety Section */
.safety-section {
    padding: 80px 0;
    background-color: var(--bg-secondary);
}

.safety-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.safety-card {
    background-color: var(--bg-card);
    border-radius: 16px;
    padding: 32px;
    border-left: 4px solid;
}

.safety-card.warning {
    border-left-color: var(--danger);
}

.safety-card.info {
    border-left-color: var(--accent-primary);
}

.safety-card h3 {
    color: var(--text-primary);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
}

.safety-card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.safety-card ul {
    list-style: none;
    padding-left: 0;
}

.safety-card ul li {
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

.safety-card ul li::before {
    content: "•";
    position: absolute;
    left: 8px;
    color: var(--accent-primary);
    font-weight: bold;
}

.safety-card.warning ul li::before {
    color: var(--danger);
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
    text-align: center;
}

.cta-content h2 {
    color: var(--text-primary);
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-content p {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 32px;
}

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

.btn {
    padding: 16px 32px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
    text-decoration: none;
}

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

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

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 48px 0 24px;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}

.footer-section h4 {
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-section p,
.footer-section a {
    color: var(--text-muted);
    font-size: 14px;
    text-decoration: none;
    line-height: 1.8;
}

.footer-section a:hover {
    color: var(--accent-primary);
}

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

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 14px;
}

/* Policy Pages */
.policy-page {
    padding: 48px 0;
    min-height: 100vh;
}

.policy-header {
    text-align: center;
    margin-bottom: 48px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
}

.policy-header h1 {
    color: var(--text-primary);
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.policy-header .date {
    color: var(--text-muted);
    font-size: 14px;
}

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

.policy-content h2 {
    color: var(--text-primary);
    font-size: 28px;
    font-weight: 600;
    margin-top: 48px;
    margin-bottom: 16px;
}

.policy-content h3 {
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 12px;
}

.policy-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
    text-align: justify;
}

.policy-content ul,
.policy-content ol {
    color: var(--text-secondary);
    margin-bottom: 16px;
    padding-left: 24px;
}

.policy-content li {
    margin-bottom: 8px;
    line-height: 1.8;
}

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

.policy-content .warning {
    color: var(--danger);
    font-weight: 600;
}

.policy-content .highlight {
    background-color: var(--bg-card);
    border-left: 4px solid var(--accent-primary);
    padding: 16px 24px;
    margin: 24px 0;
    border-radius: 8px;
}

.cta-box {
    background-color: var(--bg-card);
    border: 2px solid var(--accent-primary);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    margin: 32px 0;
}

.cta-box .btn {
    margin-top: 16px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 16px;
    }

    .nav {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

    .safety-content {
        grid-template-columns: 1fr;
    }

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

    .btn {
        width: 100%;
    }

    .section-title {
        font-size: 28px;
    }

    .policy-header h1 {
        font-size: 32px;
    }

    .policy-content h2 {
        font-size: 24px;
    }
}