:root {
    --vv-bg: #050b1d;
    --vv-bg-deep: #030713;
    --vv-panel: #0b1630;
    --vv-panel-light: #102b55;
    --vv-text: #e9f7ff;
    --vv-muted: #8da4c4;
    --vv-line: rgba(101, 188, 255, .2);
    --vv-cyan: #35e8ff;
    --vv-blue: #347bff;
    --vv-blue-dark: #124f91;
    --vv-glow: 0 0 24px rgba(53, 232, 255, .25);
    --vv-shadow: 0 24px 70px rgba(0, 76, 170, .22);
}

* { box-sizing: border-box; }

html {
    background: var(--vv-bg-deep);
    color-scheme: dark;
}

body {
    color: var(--vv-text);
    background:
        radial-gradient(circle at 78% 14%, rgba(52, 123, 255, .2), transparent 27%),
        radial-gradient(circle at 18% 74%, rgba(0, 222, 255, .1), transparent 24%),
        linear-gradient(145deg, var(--vv-bg-deep) 0%, var(--vv-bg) 52%, #071a39 100%);
}

body::before {
    background-image:
        linear-gradient(rgba(101, 188, 255, .09) 1px, transparent 1px),
        linear-gradient(90deg, rgba(101, 188, 255, .09) 1px, transparent 1px);
    background-size: 42px 42px;
}

a { color: var(--vv-cyan); }
a:hover, a:focus-visible { color: var(--vv-text); }

button,
input,
textarea,
select {
    color: var(--vv-text);
    border-color: var(--vv-line);
    background: var(--vv-panel);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--vv-cyan);
    outline-offset: 3px;
    box-shadow: var(--vv-glow);
}

.content-card,
.panel,
.card,
form,
table,
.modal-content {
    border: 1px solid var(--vv-line);
    background: rgba(11, 22, 48, .86);
    box-shadow: var(--vv-shadow);
}

.content-card:hover,
.panel:hover,
.card:hover {
    border-color: rgba(53, 232, 255, .48);
    box-shadow: var(--vv-glow), var(--vv-shadow);
}

.site-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 24px;
    padding: 28px 0 42px;
    border-top: 1px solid var(--vv-line);
    color: var(--vv-muted);
    font-size: .76rem;
}

.site-footer strong {
    color: var(--vv-cyan);
    text-shadow: 0 0 14px rgba(53, 232, 255, .45);
}

.site-footer nav {
    display: flex;
    gap: 20px;
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.site-footer nav a { color: var(--vv-cyan); }
.site-footer nav a:hover { text-shadow: 0 0 14px rgba(53, 232, 255, .65); }

@media (max-width: 760px) {
    .site-footer { display: block; }
    .site-footer span, .site-footer nav { display: block; margin-top: 10px; }
}

@media (prefers-reduced-motion: no-preference) {
    a, button, .content-card, .panel, .card {
        transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
    }
}