@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --bg: #0b0f19;
    --card: rgba(17, 24, 39, 0.65);
    --text: #f8fafc;
    --muted: #94a3b8;
    --blue: #3b82f6;
    --violet: #8b5cf6;
    --border: rgba(255,255,255,0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background:
        radial-gradient(circle at 20% 20%, rgba(59,130,246,0.15), transparent 35%),
        radial-gradient(circle at 80% 60%, rgba(139,92,246,0.12), transparent 35%),
        var(--bg);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
}

#network {
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: 0.65;
}

section {
    padding: 100px 24px;
}

h1, h2, h3 {
    line-height: 1.2;
}

h2 {
    font-size: 2.6rem;
    text-align: center;
    margin-bottom: 60px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px 64px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(90deg, var(--blue), var(--violet));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero {
    min-height: 100vh;
}

.hero-content {
    max-width: 1100px;
    margin: auto;
    text-align: center;
    padding-top: 80px;
}

.subtitle {
    color: var(--blue);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 30px;
    font-size: 0.9rem;
}

h1 {
    font-size: clamp(2.8rem, 6vw, 5.8rem);
    font-weight: 900;
}

h1 span {
    background: linear-gradient(90deg, var(--blue), var(--violet));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.description {
    max-width: 850px;
    margin: 40px auto;
    color: var(--muted);
    font-size: 1.2rem;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary,
.nav-btn {
    padding: 14px 28px;
    border-radius: 16px;
    text-decoration: none;
    font-weight: 600;
    transition: all .3s ease;
}

.btn-primary,
.nav-btn {
    background: linear-gradient(90deg, var(--blue), var(--violet));
    color: white;
}

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

.btn-primary:hover,
.btn-secondary:hover,
.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(59,130,246,0.3);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: auto;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 32px;
    backdrop-filter: blur(18px);
    transition: all .35s ease;
    box-shadow: 0 0 30px rgba(59,130,246,0.04);
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(59,130,246,0.4);
    box-shadow: 0 0 45px rgba(59,130,246,0.14);
}

.card h3 {
    margin-bottom: 16px;
    color: var(--blue);
    font-size: 1.35rem;
}

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

.section-text {
    max-width: 900px;
    margin: 40px auto 0;
    text-align: center;
    color: var(--muted);
    font-size: 1.2rem;
}

.architecture {
    text-align: center;
}

.diagram {
    max-width: 800px;
    margin: auto;
    padding: 40px;
    border-radius: 30px;
    background: var(--card);
    border: 1px solid var(--border);
    backdrop-filter: blur(16px);
    box-shadow: 0 0 50px rgba(59,130,246,0.08);
}

.diagram div {
    font-size: 1.3rem;
    padding: 10px;
}

.diagram span {
    display: block;
    font-size: 2rem;
    color: var(--blue);
}

.contact p {
    max-width: 900px;
    margin: auto;
    text-align: center;
    color: var(--muted);
    font-size: 1.2rem;
}

.philosophy {
    text-align: center;
}

.contact {
    text-align: center;
}

.contact-box {
    margin-top: 40px;
    display: inline-block;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 40px 70px;
    backdrop-filter: blur(20px);
    box-shadow: 0 0 40px rgba(59,130,246,0.08);
}

.contact-box p {
    margin: 10px 0;
}

.fade-in {
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 900px) {
    nav {
        padding: 24px;
    }

    h2 {
        font-size: 2rem;
    }

    .contact-box {
        width: 100%;
        padding: 30px;
    }

    section {
        padding: 70px 20px;
    }
}