:root {
    --bg: #08101f;
    --panel: rgba(15, 24, 42, 0.78);
    --panel-strong: rgba(11, 18, 33, 0.95);
    --text: #ecf3ff;
    --muted: #aebdd6;
    --line: rgba(255, 255, 255, 0.12);
    --shadow: 0 28px 60px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
}

html, body {
    min-height: 100%;
}

body {
    margin: 0;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(111, 140, 255, 0.25), transparent 35%),
        radial-gradient(circle at top right, rgba(122, 240, 216, 0.18), transparent 30%),
        linear-gradient(180deg, #08101f 0%, #0b1324 100%);
    font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

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

.site-shell {
    padding: 28px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto 24px;
}

.brand {
    font-size: 1.1rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-weight: 700;
}

.topnav {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.topnav a,
.button {
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 12px 18px;
    background: rgba(255, 255, 255, 0.04);
    transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.topnav a.is-active,
.topnav a:hover,
.button:hover {
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.35);
    background: rgba(255, 255, 255, 0.12);
}

.page {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    gap: 24px;
}

.hero-page {
    padding-bottom: 24px;
}

.hero-card,
.demo-card,
.panel {
    border: 1px solid var(--line);
    border-radius: 28px;
    background: var(--panel);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
}

.hero-card {
    padding: 42px;
}

.hero-card.compact {
    max-width: 860px;
}

.eyebrow,
.card-label {
    margin: 0 0 14px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.76rem;
    color: var(--muted);
}

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

h1 {
    font-size: clamp(2.5rem, 5vw, 4.8rem);
    line-height: 0.96;
    margin-bottom: 18px;
}

h2 {
    font-size: 1.45rem;
    margin-bottom: 12px;
}

.lede,
.body-copy,
.demo-card p,
.panel p,
.feature-list {
    color: var(--muted);
    line-height: 1.65;
    font-size: 1.02rem;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.button-primary {
    background: linear-gradient(135deg, #68e1fd 0%, #7f8cff 100%);
    color: #08101f;
    border-color: transparent;
    font-weight: 700;
}

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

.grid {
    display: grid;
    gap: 18px;
}

.grid-three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.demo-card,
.panel {
    padding: 28px;
}

.demo-card-aurora {
    background: linear-gradient(180deg, rgba(17, 29, 56, 0.92), rgba(9, 17, 35, 0.96));
}

.demo-card-midnight {
    background: linear-gradient(180deg, rgba(18, 18, 28, 0.94), rgba(8, 10, 16, 0.97));
}

.demo-card-atlas {
    background: linear-gradient(180deg, rgba(20, 28, 46, 0.92), rgba(10, 16, 28, 0.97));
}

.demo-page-aurora .hero-card {
    background: linear-gradient(135deg, rgba(111, 140, 255, 0.28), rgba(122, 240, 216, 0.12)), var(--panel-strong);
}

.demo-page-midnight .hero-card {
    background: linear-gradient(135deg, rgba(16, 19, 31, 0.85), rgba(52, 35, 106, 0.35)), var(--panel-strong);
}

.demo-page-atlas .hero-card {
    background: linear-gradient(135deg, rgba(16, 24, 40, 0.85), rgba(142, 166, 203, 0.2)), var(--panel-strong);
}

.feature-list {
    margin: 18px 0 0;
    padding-left: 18px;
}

.feature-list.large {
    font-size: 1.05rem;
}

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

    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .hero-card {
        padding: 28px;
    }
}