:root {
    --primary: #1e3a8a;       /* deep professional blue */
    --primary-dark: #172554;
    --accent: #60a5fa;        /* lighter blue accent */
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --bg: #0f172a;
    --card-bg: #1e293b;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg);
    color: var(--text);
}

h1, h2, h3 {
    font-family: 'Roboto', sans-serif;
    font-weight: 700;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    transition: all 0.25s ease;
}

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

.nav-link {
    color: var(--text-muted);
    transition: color 0.2s;
}

.nav-link:hover {
    color: white;
}

/* Language Dropdown - minimal custom styles only */
.lang-item.active {
    background-color: rgba(37, 99, 235, 0.3);
    font-weight: 600;
}

.card-mock {
    background: linear-gradient(135deg, #020617, #96969645);
    border: 1px solid #475569;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.6);
}

section {
    scroll-margin-top: 5rem;
}

html[lang="zh-Hant"] .hero h1 {
    white-space: nowrap;
}

/* Mobile improvements */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    .hero p {
        font-size: 1.125rem;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    html[lang="zh-Hant"] .hero h1 {
        font-size: 2rem;
    }
}