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

:root {
    --bg: #0f172a;
    --bg-deep: #020617;
    --card: #172033;
    --card-light: #1e293b;
    --text: #f8fafc;
    --muted: #cbd5e1;
    --blue: #3b82f6;
    --blue-dark: #2563eb;
    --blue-soft: #93c5fd;
    --border: rgba(148, 163, 184, 0.2);
}

html {
    scroll-behavior: smooth;
}

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

a {
    color: inherit;
}

.container {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-wrap {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-decoration: none;
}

.brand-ai {
    color: var(--blue);
    text-shadow: 0 0 12px rgba(59, 130, 246, 0.5);
}

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

.nav a {
    text-decoration: none;
}

.nav a:hover {
    color: var(--blue-soft);
}

.hero {
    min-height: 680px;
    display: flex;
    align-items: center;
    text-align: center;
    background:
        radial-gradient(circle at 20% 10%, rgba(59, 130, 246, 0.25), transparent 28%),
        radial-gradient(circle at 80% 20%, rgba(96, 165, 250, 0.18), transparent 28%),
        var(--bg);
}

.hero-inner {
    padding: 100px 0;
}

.badge {
    display: inline-block;
    background: var(--blue-dark);
    color: white;
    padding: 10px 18px;
    border-radius: 999px;
    margin-bottom: 34px;
    font-weight: 700;
}

h1 {
    max-width: 920px;
    margin: 0 auto 24px;
    font-size: clamp(3rem, 8vw, 6.3rem);
    line-height: 0.95;
    letter-spacing: -3px;
}

.hero-text {
    max-width: 780px;
    margin: 0 auto 36px;
    font-size: clamp(1.15rem, 2vw, 1.45rem);
    color: var(--muted);
}

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

.button {
    display: inline-block;
    padding: 15px 24px;
    border-radius: 12px;
    font-weight: 800;
    text-decoration: none;
    transition: transform 0.15s ease, background 0.15s ease, border 0.15s ease;
}

.button:hover {
    transform: translateY(-2px);
}

.primary {
    background: var(--blue-dark);
    color: white;
}

.primary:hover {
    background: var(--blue);
}

.secondary {
    border: 2px solid var(--blue-dark);
    color: white;
}

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

.section {
    padding: 86px 0;
}

.section-label {
    color: var(--blue-soft);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.8rem;
    font-weight: 800;
    margin-bottom: 12px;
}

h2 {
    max-width: 900px;
    font-size: clamp(2rem, 4vw, 3.5rem);
    line-height: 1.05;
    letter-spacing: -1.5px;
    margin-bottom: 28px;
}

.grid {
    display: grid;
    gap: 22px;
    margin-top: 36px;
}

.three {
    grid-template-columns: repeat(3, 1fr);
}

.four {
    grid-template-columns: repeat(4, 1fr);
}

.card,
.mini-card {
    background: linear-gradient(180deg, var(--card-light), var(--card));
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 28px;
}

.card:hover,
.mini-card:hover {
    border-color: rgba(147, 197, 253, 0.55);
}

.icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

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

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

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.idea-list {
    display: grid;
    gap: 12px;
}

.idea-list div {
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(147, 197, 253, 0.25);
    border-radius: 14px;
    padding: 16px 18px;
    font-weight: 700;
}

.cta {
    padding: 90px 0;
}

.cta-box {
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.3), transparent 35%),
        linear-gradient(180deg, var(--card-light), var(--card));
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 60px 30px;
    text-align: center;
}

.cta-box h2 {
    margin-left: auto;
    margin-right: auto;
}

.cta-box p {
    color: var(--muted);
    font-size: 1.3rem;
    margin-bottom: 28px;
}

.footer {
    border-top: 1px solid var(--border);
    padding: 28px 0;
    color: #94a3b8;
    text-align: center;
    font-size: 0.95rem;
}

@media (max-width: 900px) {
    .three,
    .four,
    .split {
        grid-template-columns: 1fr;
    }

    .hero {
        min-height: auto;
    }
}

@media (max-width: 640px) {
    .nav-wrap {
        flex-direction: column;
        padding: 18px 0;
    }

    .nav {
        gap: 14px;
        flex-wrap: wrap;
        justify-content: center;
    }

    h1 {
        letter-spacing: -1.5px;
    }

    .badge {
        font-size: 0.9rem;
    }
}