* {
    margin: 0;
    padding: 0;
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    font-family: 'Space Grotesk', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background .6s ease, color .6s ease
}

::selection {
    background: var(--cyan);
    color: var(--bg)
}

::-webkit-scrollbar {
    width: 10px
}

::-webkit-scrollbar-track {
    background: var(--bg)
}

::-webkit-scrollbar-thumb {
    background: var(--line-strong);
    border-radius: 99px
}

.mono {
    font-family: 'JetBrains Mono', monospace
}

.svg-defs {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden
}

/* background layers */
#bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none
}

.grid-overlay {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: .55;
    background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 44px 44px;
    -webkit-mask-image: radial-gradient(ellipse 85% 70% at 50% 38%, #000 25%, transparent 78%);
    mask-image: radial-gradient(ellipse 85% 70% at 50% 38%, #000 25%, transparent 78%)
}

.grain {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: .05;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")
}

#progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 60;
    background: var(--cyan);
    transform-origin: left;
    transform: scaleX(0);
    box-shadow: 0 0 14px var(--cyan-glow);
    transition: transform .1s linear
}

header,
main,
footer {
    position: relative;
    z-index: 1
}

/* nav */
.nav {
    max-width: 1180px;
    margin: 0 auto;
    padding: 22px 28px;
    display: flex;
    align-items: center;
    gap: 16px
}

.logo {
    display: flex;
    align-items: center;
    gap: 11px;
    font-family: 'Unbounded';
    font-weight: 700;
    font-size: .9rem;
    letter-spacing: .06em;
    text-decoration: none;
    color: inherit
}

.logo-mark {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    color: var(--cyan);
    clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
    transition: transform .4s
}

.logo:hover .logo-mark {
    transform: rotate(90deg)
}

.status {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 9px;
    font-family: 'JetBrains Mono';
    font-size: .66rem;
    letter-spacing: .16em;
    color: var(--muted);
    border: 1px solid var(--line);
    background: var(--surface);
    padding: 8px 15px;
    border-radius: 99px
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--mint);
    animation: pulse 2.2s infinite
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 var(--mint-soft)
    }

    70% {
        box-shadow: 0 0 0 9px transparent
    }

    100% {
        box-shadow: 0 0 0 0 transparent
    }
}

/* theme toggle */
.toggle {
    position: relative;
    width: 64px;
    height: 31px;
    border-radius: 99px;
    cursor: pointer;
    border: 1px solid var(--line-strong);
    background: var(--surface);
    transition: background .5s, border-color .5s
}

.toggle svg {
    position: absolute;
    top: 50%;
    translate: 0 -50%;
    width: 15px;
    height: 15px;
    color: var(--muted)
}

.toggle .sun {
    left: 8px
}

.toggle .moon {
    right: 8px
}

.knob {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 23px;
    height: 23px;
    border-radius: 50%;
    background: var(--knob);
    border: 1px solid var(--line-strong);
    transition: transform .5s cubic-bezier(.68, -.3, .32, 1.3), background .5s
}

[data-theme="dark"] .knob {
    transform: translateX(33px)
}

/* footer */
.footer {
    max-width: 1180px;
    margin: 60px auto 0;
    padding: 26px 28px 36px;
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    font-family: 'JetBrains Mono';
    font-size: .62rem;
    letter-spacing: .14em;
    color: var(--muted)
}

.footer a {
    color: var(--muted);
    text-decoration: none;
    transition: color .3s
}

.footer a:hover {
    color: var(--cyan)
}

.footer b {
    color: var(--cyan);
    font-weight: 400
}

@keyframes blink {
    50% {
        opacity: 0
    }
}

/* Light Theme QR Code Fix */
[data-theme="light"] .qr-img {
    filter: invert(0.85) drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}