:root {
    --bg-color: #0b0e14;
    --grad-color-start: #ff007c;
    --grad-color-end: #00d2ff;
    --line-opacity: 0.15;
    --accent: #00e3b2;
    --accent-fade: rgba(0, 227, 178, .18);
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    overflow-x: hidden;
    font-family: "Inter", system-ui, sans-serif;
    font-size: 18px;
    background: var(--bg-color);
    color: #e8eaf0;
    line-height: 1.65;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -4;
    pointer-events: none;
    background:
        radial-gradient(900px at 15% 25%, rgba(255, 0, 124, .10) 0%, transparent 70%),
        radial-gradient(900px at 85% 75%, rgba(0, 210, 255, .10) 0%, transparent 70%),
        linear-gradient(120deg, rgba(255, 0, 124, .05) 0%, rgba(0, 210, 255, .05) 100%);
}

.container {
    width: min(100% - 2rem, 1200px);
    margin-inline: auto;
    padding: 1rem 1.5rem;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(11, 14, 20, .9);
    backdrop-filter: blur(10px);
    transition: background .3s, border-color .3s;
    border-bottom: 1px solid rgba(255, 255, 255, .05);
    padding-block: 0.25rem;
}

.brand {
    display: flex;
    align-items: center;
    color: var(--accent);
    font-weight: 500;
    font-size: clamp(1.6rem, 2.8vw, 2rem);
    margin: 0;
    font-family: 'Righteous', cursive;
}

.brand span {
    color: #e8eaf0;
    font-weight: 500;
}

nav a {
    color: #e8eaf0;
    text-decoration: none;
    font-weight: 500;
    font-size: clamp(1rem, 1vw+.75rem, 1.2rem);
    padding: .55rem 1.3rem;
    border-radius: 8px;
    transition: background .2s;
}

nav a:hover {
    background: rgba(255, 255, 255, .08);
}

section {
    padding: clamp(5rem, 9vw, 9rem) 0;
}

section:not(.hero) {
    padding: clamp(5rem, 9vw, 9rem) 0;
}

section.hero {
    padding: 0;
}

section+section {
    border-top: 1px solid var(--accent-fade);
}

.hero {
    min-height: calc(100vh - 6.5rem);
    display: grid;
    place-items: center;
    text-align: center;
}

.hero h1 {
    font-size: clamp(3.2rem, 8vw, 6rem);
    line-height: 1.05;
    background: linear-gradient(90deg, var(--grad-color-start), var(--grad-color-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: clamp(1.25rem, 2vw, 2rem);
}

h1,
h2,
h3 {
    font-weight: 600;
    margin: 0 0 .75rem;
}

h2 {
    font-size: clamp(2.1rem, 3.7vw+.5rem, 2.9rem);
}

.columns {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

@media(min-width:1000px) {
    .columns {
        grid-template-columns: repeat(4, 1fr);
    }
}

#background-svg {
    position: fixed;
    inset: 0;
    z-index: -3;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transition: filter .3s ease-out, opacity .3s ease-out;
}

.site-footer {
    border-top: 1px solid var(--accent-fade);
    background: #0a0d12;
    padding: 2.5rem 0;
    text-align: center;
    font-size: .9rem;
    color: #a9adb9;
}