:root {
    color-scheme: dark;
    --bg-top: #07101c;
    --bg-bottom: #110d1f;
    --surface: rgba(18, 24, 41, 0.86);
    --surface-strong: rgba(26, 32, 54, 0.96);
    --border: rgba(128, 162, 255, 0.15);
    --text: #f3f6ff;
    --muted: #b9c3de;
    --teal: #7fe4f3;
    --teal-strong: #45d0ea;
    --amber: #f0b75e;
    --shadow: 0 18px 50px rgba(3, 7, 18, 0.45);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", Inter, system-ui, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top center, rgba(116, 93, 255, 0.22), transparent 28%),
        radial-gradient(circle at 75% 15%, rgba(76, 212, 231, 0.18), transparent 20%),
        linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

.page-shell {
    width: min(920px, calc(100% - 32px));
    margin: 0 auto;
    padding: 28px 0 48px;
}

.hero-card,
.content-card {
    background: linear-gradient(180deg, rgba(34, 40, 67, 0.96), rgba(16, 20, 35, 0.96));
    border: 1px solid var(--border);
    border-radius: 28px;
    box-shadow: var(--shadow);
}

.hero-card {
    padding: 28px;
    margin-bottom: 18px;
}

.content-card {
    padding: 24px;
    margin-bottom: 16px;
}

.eyebrow {
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--teal);
    margin-bottom: 12px;
}

h1,
h2,
h3 {
    margin: 0 0 12px;
    line-height: 1.1;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
}

h2 {
    font-size: clamp(1.25rem, 3vw, 1.7rem);
}

h3 {
    font-size: 1rem;
}

p,
li {
    color: var(--muted);
    line-height: 1.6;
}

.lead {
    font-size: 1.02rem;
    max-width: 62ch;
}

.meta-line {
    margin-top: 10px;
    color: var(--amber);
    font-size: 0.95rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 22px;
}

.primary-button,
.secondary-button,
.danger-button,
.text-link {
    text-decoration: none;
}

.primary-button,
.secondary-button,
.danger-button {
    border: 0;
    cursor: pointer;
    font: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 18px;
    border-radius: 999px;
    font-weight: 700;
}

.primary-button {
    color: #08131f;
    background: linear-gradient(135deg, var(--teal), #b5f6ff);
}

.secondary-button {
    color: var(--text);
    border: 1px solid rgba(127, 228, 243, 0.25);
    background: rgba(255, 255, 255, 0.04);
}

.danger-button {
    color: #19080b;
    background: linear-gradient(135deg, #ff8fa3, #ffd1d9);
}

button:disabled {
    cursor: progress;
    opacity: 0.64;
}

.feature-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.feature-item {
    padding: 16px;
    border-radius: 20px;
    border: 1px solid rgba(127, 228, 243, 0.12);
    background: rgba(255, 255, 255, 0.03);
}

.clean-list {
    margin: 0;
    padding-left: 20px;
}

.text-link {
    color: var(--teal);
    font-weight: 700;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-card {
    margin-bottom: 0;
}

@media (max-width: 640px) {
    .page-shell {
        width: min(100% - 20px, 920px);
        padding: 16px 0 28px;
    }

    .hero-card,
    .content-card {
        border-radius: 22px;
    }

    .hero-card {
        padding: 22px 18px;
    }

    .content-card {
        padding: 18px;
    }
}