:root {
    --primary: #0F172A;
    --secondary: #475569;
    --accent: #F59E0B;
    --accent-hover: #D97706;
    --bg-body: #F8FAFC;
    --bg-card: #FFFFFF;
    --border: #E2E8F0;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Navigation */
header {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.nav-container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo svg {
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links a.nav-item {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

.lang-switch {
    background: var(--bg-body);
    border: 1px solid var(--border);
    padding: 6px 16px;
    border-radius: 99px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: all 0.2s;
}

.lang-switch:hover {
    background: var(--border);
}

/* Hero Section */
.hero {
    padding: 160px 24px 100px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    color: var(--primary);
}

.hero p {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-inline: auto;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.btn-primary:hover {
    background-color: #1E293B;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: white;
    color: var(--primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background-color: var(--bg-body);
}

/* Features/Cards */
.section-cards {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px 80px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
}

.card h2 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--primary);
}

.card p {
    color: var(--secondary);
    margin-bottom: 24px;
}

.card-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
}

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

/* Standard Page (Support / Privacy) */
.page-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 140px 24px 80px;
}

.page-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.page-content h1 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.page-content .meta {
    color: var(--secondary);
    margin-bottom: 40px;
    font-size: 0.95rem;
}

.page-content h2 {
    font-size: 1.25rem;
    margin: 32px 0 16px;
    color: var(--primary);
}

.page-content p {
    color: var(--secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

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

.page-content li {
    margin-bottom: 8px;
}

.page-content a.inline-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.page-content a.inline-link:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.note-box {
    margin-top: 32px;
    padding: 20px;
    background: var(--bg-body);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.note-box p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 40px 24px;
    text-align: center;
    color: var(--secondary);
    font-size: 0.9rem;
}

footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

@media (max-width: 640px) {
    .nav-container {
        flex-wrap: wrap;
        gap: 16px;
        justify-content: center;
    }
    .page-content {
        padding: 32px 24px;
    }
}