:root {
    --bg0: #0a0f1c;
    /* slate-950-ish */
    --bg1: #0f172a;
    /* slate-900-ish */
    --text: #e5e7eb;
    /* slate-200 */
    --muted: #94a3b8;
    /* slate-400 */
    --brand: #22d3ee;
    /* cyan-300 */
    --card: #0b1222;
    /* slightly lighter than bg0 */
    --border: rgba(255, 255, 255, 0.12);
    --white: #ffffff;
    --black: #0b0b0b;
}

html,
body {
    height: 100%
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    color: var(--text);
    background: linear-gradient(180deg, var(--bg0), var(--bg1), var(--bg0))
}

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

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px
}

.stack {
    display: flex;
    gap: 12px;
    flex-wrap: wrap
}

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: saturate(120%) blur(8px);
    background: rgba(10, 15, 28, 0.6);
    border-bottom: 1px solid var(--border)
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0
}

.nav a:hover {
    color: #fff
}

.nav-links {
    display: none;
    gap: 24px;
    color: #cbd5e1
}

@media(min-width:768px) {
    .nav-links {
        display: flex
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 16px;
    padding: 10px 14px;
    border: 1px solid transparent;
    background: var(--brand);
    color: #012b34;
    font-weight: 600;
    box-shadow: 0 0 0 0 rgba(34, 211, 238, 0);
    transition: all .2s ease
}

.btn:hover {
    transform: translateY(-1px)
}

.btn-outline {
    background: var(--white);
    color: #111827;
    border: 1px solid #e5e7eb
}

.btn-outline:hover {
    background: #f4f6f8
}

.btn-lg {
    padding: 12px 18px;
    border-radius: 18px
}

.btn-sm {
    padding: 8px 12px;
    border-radius: 14px;
    font-size: 14px
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid var(--border);
    background: rgba(15, 23, 42, 0.7);
    color: #eef2f7;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px
}

/* Cards */
.card {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden
}

.card-header {
    padding: 18px 18px 0
}

.card-title {
    font-weight: 700
}

.card-content {
    padding: 12px 18px 18px
}

/* Sections */
section {
    padding: 72px 0;
    scroll-margin-top: 96px
}

h1 {
    margin: 0
}

h2 {
    margin: 0 0 8px 0
}

p {
    line-height: 1.6
}

/* Hero */
.hero {
    position: relative;
    overflow: hidden
}

.hero-overlay {
    pointer-events: none;
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at top, rgba(34, 211, 238, 0.20), transparent 60%)
}

.hero h1 {
    font-size: clamp(32px, 5vw, 60px);
    font-weight: 800;
    line-height: 1.1
}

.muted {
    color: var(--muted)
}

.brand {
    color: var(--brand)
}

/* Grid */
.grid {
    display: grid;
    gap: 20px
}

@media(min-width:768px) {
    .grid.cols-2 {
        grid-template-columns: repeat(2, 1fr)
    }
}

@media(min-width:1024px) {
    .grid.cols-3 {
        grid-template-columns: repeat(3, 1fr)
    }
}

/* Footer */
footer {
    border-top: 1px solid var(--border)
}

/* Utilities */
.mt-2 {
    margin-top: 8px
}

.mt-3 {
    margin-top: 12px
}

.mt-4 {
    margin-top: 16px
}

.mt-6 {
    margin-top: 24px
}

.mt-8 {
    margin-top: 32px
}

.mb-8 {
    margin-bottom: 32px
}

.flex {
    display: flex
}

.items-center {
    align-items: center
}

.justify-between {
    justify-content: space-between
}

.gap-2 {
    gap: 8px
}

.gap-3 {
    gap: 12px
}

.text-sm {
    font-size: 14px
}

.text-lg {
    font-size: 18px
}

.uppercase {
    text-transform: uppercase
}

.tracking-wide {
    letter-spacing: .16em
}

.text-white {
    color: #fff
}

.pill {
    display: inline-block;
    padding: .25rem .5rem;
    border-radius: 999px;
    font-size: 11px;
    letter-spacing: .12em;
    text-transform: uppercase
}

.pill-brand {
    background: rgba(34, 211, 238, 0.15);
    color: #b9f5ff;
    border: 1px solid rgba(34, 211, 238, 0.35)
}

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

.list li {
    margin: .4rem 0
}