:root {
    --bg: #0f172a;
    --bg-soft: #111827;
    --card: #1e293b;
    --text: #e5e7eb;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-soft: rgba(56, 189, 248, 0.12);
    --border: rgba(148, 163, 184, 0.25);
    --white: #ffffff;
    --max-width: 1120px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(100% - 32px, var(--max-width));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(15, 23, 42, 0.92);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
}

.header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
}

.logo-mark {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid var(--border);
}

.logo-text {
    font-size: 1.05rem;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 22px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

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

.hero {
    padding: 110px 0 96px;
    background:
        radial-gradient(circle at top left, rgba(56, 189, 248, 0.16), transparent 34%),
        radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.10), transparent 30%);
}

.hero-content {
    max-width: 850px;
}

.eyebrow,
.section-label {
    color: var(--accent);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.8rem;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    font-size: clamp(2.4rem, 6vw, 4.8rem);
    line-height: 1.05;
    margin-bottom: 24px;
}

h2 {
    font-size: clamp(1.8rem, 4vw, 3rem);
    line-height: 1.15;
    margin-bottom: 20px;
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.hero-text {
    max-width: 720px;
    color: var(--text-muted);
    font-size: 1.15rem;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 20px;
    border-radius: 999px;
    font-weight: 700;
    border: 1px solid var(--border);
}

.button.primary {
    background: var(--accent);
    color: #082f49;
    border-color: var(--accent);
}

.button.secondary {
    background: transparent;
    color: var(--text);
}

.button:hover {
    transform: translateY(-1px);
}

.section {
    padding: 86px 0;
    background: var(--bg);
}

.section-dark {
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 56px;
}

.section-grid p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    margin-top: 32px;
}

.card {
    padding: 26px;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: var(--card);
}

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

.tag {
    display: inline-block;
    margin: 10px 8px 0 0;
    padding: 5px 10px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 700;
}

.timeline {
    display: grid;
    gap: 18px;
    margin-top: 30px;
}

.timeline-item {
    padding: 24px;
    border-left: 4px solid var(--accent);
    background: var(--bg-soft);
    border-radius: 0 18px 18px 0;
}

.timeline-item p {
    color: var(--text-muted);
    margin-bottom: 0;
}

.contact-section {
    background:
        linear-gradient(135deg, rgba(56, 189, 248, 0.12), transparent),
        var(--bg);
}

.contact-box {
    padding: 42px;
    border: 1px solid var(--border);
    border-radius: 26px;
    background: rgba(30, 41, 59, 0.72);
}

.contact-box p {
    color: var(--text-muted);
    max-width: 680px;
}

.site-footer {
    border-top: 1px solid var(--border);
    background: #020617;
    color: var(--text-muted);
}

.footer-inner {
    min-height: 86px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    font-size: 0.9rem;
}

.footer-inner p {
    margin: 0;
}

@media (max-width: 820px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 0;
    }

    .main-nav {
        flex-wrap: wrap;
        gap: 14px;
    }

    .hero {
        padding: 72px 0;
    }

    .section-grid,
    .card-grid {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
    }
}