:root {
    color-scheme: dark;
    --bg: #0f172a;
    --panel: #111827;
    --panel-light: #1f2937;
    --text: #f9fafb;
    --muted: #cbd5e1;
    --accent: #22c55e;
    --accent-strong: #16a34a;
    --border: rgba(255, 255, 255, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.25), transparent 34%), var(--bg);
    color: var(--text);
}

.page {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    padding: 48px 0;
}

.hero {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 32px;
    align-items: center;
    padding: 36px;
    border: 1px solid var(--border);
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(17, 24, 39, 0.96), rgba(31, 41, 55, 0.88));
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--accent);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.78rem;
}

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

h1 {
    margin-bottom: 18px;
    font-size: clamp(2.1rem, 5vw, 4.4rem);
    line-height: 0.98;
}

.lead {
    color: var(--muted);
    font-size: 1.16rem;
    line-height: 1.65;
}

.hero__meta {
    display: inline-flex;
    gap: 10px;
    align-items: center;
    padding: 12px 16px;
    border-radius: 999px;
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.28);
}

.build-badge {
    display: inline-flex;
    margin: 18px 0 0;
    padding: 8px 12px;
    border-radius: 999px;
    color: #fef3c7;
    background: rgba(234, 179, 8, 0.13);
    border: 1px solid rgba(234, 179, 8, 0.32);
    font-size: 0.92rem;
}

.hero__image {
    width: 100%;
    max-height: 300px;
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin: 28px 0;
}

.card,
.panel {
    border: 1px solid var(--border);
    border-radius: 22px;
    background: rgba(17, 24, 39, 0.86);
    padding: 24px;
}

.card__icon {
    width: 54px;
    height: 54px;
    margin-bottom: 18px;
}

.card h2,
.panel h2 {
    margin-bottom: 10px;
}

.card p,
.panel p {
    color: var(--muted);
    line-height: 1.6;
}

button {
    border: 0;
    border-radius: 999px;
    padding: 12px 18px;
    cursor: pointer;
    background: var(--accent);
    color: #052e16;
    font-weight: 700;
}

button:hover {
    background: var(--accent-strong);
}

.result {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: 16px;
    background: var(--panel-light);
}

.result.is-ok {
    color: #dcfce7;
    background: rgba(34, 197, 94, 0.16);
    border: 1px solid rgba(34, 197, 94, 0.34);
}

code {
    color: var(--accent);
}

@media (max-width: 820px) {
    .hero,
    .cards {
        grid-template-columns: 1fr;
    }

    .hero {
        padding: 26px;
    }
}