:root {
    --bg-primary: #0a0b0d;
    --bg-secondary: #121418;
    --bg-card: #181b20;
    --border-color: #262a33;
    --text-primary: #f0f2f5;
    --text-secondary: #9da5b4;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --max-width: 1120px;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
}

/* Header */
.header {
    border-bottom: 1px solid var(--border-color);
    background: rgba(10, 11, 13, 0.85);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
}

.brand-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background-color: var(--accent);
    box-shadow: 0 0 10px var(--accent);
}

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

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

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

/* Hero */
.hero {
    padding: 110px 0 90px 0;
    text-align: center;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 36px auto;
    font-weight: 400;
}

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

.btn {
    display: inline-block;
    padding: 12px 26px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent);
    color: #ffffff;
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

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

/* Sections */
.section {
    padding: 90px 0;
}

.section-alt {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background-color: var(--accent-glow);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.card-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Arch Box */
.arch-box {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.arch-step {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.arch-num {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.8;
}

.arch-info h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.arch-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.contact-box {
    margin-top: 32px;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.footer-meta {
    font-weight: 500;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .footer-container {
        flex-direction: column;
        gap: 12px;
    }
}