:root {
    --bg1: #000;
    --bg2: #0a0a0a;
    --text: #d0d0d0;
    --accent: #00fff7;
    --focus: #fff;
    --radius: 12px;
    --fs-base: clamp(15px, 1.15vw, 17px);
    --fs-h1: clamp(28px, 4vw, 36px);
    --header-footer-allowance: 160px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    font: 400 var(--fs-base)/1.55 "Courier New", Courier, monospace;
    color: var(--text);
    background: radial-gradient(circle at center, var(--bg1) 0%, var(--bg2) 100%);
    -webkit-tap-highlight-color: transparent;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--accent);
    color: #000;
    padding: 8px 12px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
}

.skip-link:focus {
    left: 12px;
    top: 12px;
    z-index: 1000;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    text-align: center;
    padding: 1.2rem 1rem;
    border-bottom: 1px solid var(--accent);
    background: #000;
    backdrop-filter: blur(3px);
}

.brand {
    margin: 0;
    font-size: var(--fs-h1);
    color: var(--accent);
    letter-spacing: .5px;
    text-shadow: 0 0 10px var(--accent), 0 0 30px var(--accent);
}

.brand span {
    color: var(--accent);
}

.site-nav ul {
    list-style: none;
    margin: .5rem 0 0;
    padding: 0;
    display: inline-flex;
    gap: 1.2rem;
    align-items: center;
}

.site-nav a {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    border-radius: 10px;
    color: var(--text);
    text-decoration: none;
    font-size: clamp(20px, 3.5vw, 24px);
    transition: color .2s;
}

.site-nav a[aria-current="page"],
.site-nav a:hover,
.site-nav a:focus-visible {
    color: var(--accent);
    text-shadow: 0 0 8px var(--accent);
}

.tooltip {
    position: absolute;
    bottom: -2.2em;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #000;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 6px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s;
    white-space: nowrap;
}

.site-nav a:hover .tooltip,
.site-nav a:focus-visible .tooltip {
    opacity: 1;
}

@media (hover:none) {
    .tooltip {
        display: none;
    }
}

.stage {
    position: relative;
    flex: 1;
    min-height: calc(100vh - var(--header-footer-allowance));
    display: grid;
    place-items: center;
    justify-items: center;
    align-content: start;
    row-gap: 2rem;
    padding: 0.25rem 2rem 2rem;
    perspective: 800px;
}

#particles-back,
#particles-front {
    position: fixed;
    inset: 0;
    pointer-events: none;
    will-change: transform;
}

#particles-back {
    z-index: 0;
    background: #000;
}

#particles-front {
    z-index: 1;
    mix-blend-mode: screen;
    opacity: .6;
}

.card {
    position: relative;
    z-index: 2;
    width: min(92vw, 720px);
    background: rgba(0, 0, 0, .65);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    box-shadow: 0 0 25px #00fff744;
    backdrop-filter: blur(10px);
    transform: translateZ(40px);
    animation: glowPulse 3s infinite;
    margin-top: 0;
}

@keyframes glowPulse {

    0%,
    100% {
        box-shadow: 0 0 25px var(--accent);
    }

    50% {
        box-shadow: 0 0 45px #00fff799;
    }
}

button {
    margin-top: 1rem;
    padding: 12px 22px;
    font-size: 1rem;
    color: #000;
    background: var(--accent);
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 0 0 15px var(--accent);
    transition: transform .2s, background .2s;
}

button:hover {
    background: #00e6dd;
    transform: translateY(-1px);
}

button:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
}

.info {
    margin-top: 1rem;
    width: 100%;
    background: rgba(15, 15, 15, .7);
    border: 1px solid var(--accent);
    border-radius: 10px;
    padding: 1rem;
    text-align: left;
    color: #a8ffff;
    box-shadow: inset 0 0 10px #00fff722;
    overflow-wrap: anywhere;
}

.info p {
    margin: 6px 0;
}

.site-footer {
    margin-top: auto;
    text-align: center;
    padding: 1.5rem;
    border-top: 1px solid var(--accent);
    background: #000;
    position: relative;
    z-index: 10;
}

.site-footer a {
    color: var(--accent);
    text-decoration: none;
}

.site-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    .site-header {
        padding: 1rem;
    }

    .card {
        padding: 1.5rem;
    }
}

.about .stage--list {
    min-height: auto;
    align-content: start;
    justify-items: center;
    gap: 1.25rem;
    padding: 0.75rem 2rem 2rem;
}

.about .section-card:first-of-type,
.about .card:first-of-type {
    margin-top: 0;
}

.about .site-header {
    padding-bottom: .75rem;
}

.about .brand {
    margin: 0;
}

.about .site-nav ul {
    margin: .25rem 0 0;
}