:root {
    color-scheme: dark;

    --color-background: #02060a;
    --color-glow: #061722;
    --color-text: #e8fffa;
    --color-accent: #5fe3cf;
    --color-surface: rgb(2 9 11 / 0.78);
    --color-surface-hover: rgb(3 16 18 / 0.88);
    --color-border: rgb(95 227 207 / 0.38);
    --color-star: rgb(64 190 178 / 0.32);
    --color-star-dim: rgb(84 70 160 / 0.25);

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: ui-monospace, 'Cascadia Code', 'SF Mono', Menlo, Consolas, monospace;

    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;

    --radius: 2px;
    --control-size: 44px;
    --duration-fast: 200ms;
    --duration-fade: 700ms;
}

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

html,
body {
    height: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--font-sans);
    color: var(--color-text);
    /* Static fallback while JavaScript/WebGL is unavailable. */
    background:
        radial-gradient(circle, var(--color-star) 1px, transparent 1.5px) 0 0 / 89px 89px,
        radial-gradient(circle, var(--color-star-dim) 1px, transparent 1.5px) 11px 19px / 127px 127px,
        radial-gradient(circle, var(--color-star-dim) 1.5px, transparent 2px) 29px 7px / 173px 173px,
        radial-gradient(ellipse at center, var(--color-glow) 0%, var(--color-background) 70%);
    background-color: var(--color-background);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

.portal {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    opacity: 0;
    transition: opacity var(--duration-fade) ease-out;
}

.portal-active .portal {
    opacity: 1;
}

.portal-interactive .portal {
    cursor: grab;
    touch-action: none;
}

.portal-dragging .portal {
    cursor: grabbing;
}

.contact {
    position: relative;
    z-index: 1;
    padding: var(--space-6) var(--space-4);
    text-align: center;
    /* Only the link itself is interactive, so drags can start right next to it. */
    pointer-events: none;
}

.contact__status {
    margin: 0 0 var(--space-5);
    font-size: clamp(2rem, 1.4rem + 3vw, 3.5rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: 0.02em;
    color: var(--color-text);
    text-shadow:
        0 0 24px rgb(95 227 207 / 0.35),
        0 2px 12px rgb(0 0 0 / 0.8);
}

.contact__link {
    pointer-events: auto;
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    min-height: var(--control-size);
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-mono);
    font-size: clamp(1.05rem, 0.9rem + 0.8vw, 1.5rem);
    letter-spacing: 0.04em;
    color: var(--color-text);
    text-decoration: none;
    overflow-wrap: anywhere;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgb(0 0 0 / 0.45);
    transition:
        border-color var(--duration-fast) ease-out,
        background-color var(--duration-fast) ease-out;
}

.contact__link:hover {
    border-color: var(--color-accent);
    background: var(--color-surface-hover);
}

.contact__link:focus-visible,
.motion-toggle:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
}

.contact__icon {
    flex: none;
    color: var(--color-accent);
}

.motion-toggle {
    position: fixed;
    right: var(--space-4);
    bottom: var(--space-4);
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--control-size);
    height: var(--control-size);
    padding: 0;
    color: var(--color-text);
    cursor: pointer;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition:
        border-color var(--duration-fast) ease-out,
        background-color var(--duration-fast) ease-out;
}

.motion-toggle:hover {
    border-color: var(--color-accent);
    background: var(--color-surface-hover);
}

.motion-toggle[hidden],
.motion-toggle[data-state='playing'] .motion-toggle__icon--play,
.motion-toggle[data-state='paused'] .motion-toggle__icon--pause {
    display: none;
}

@media (prefers-reduced-motion: reduce) {
    .portal,
    .contact__link,
    .motion-toggle {
        transition: none;
    }
}

@media (forced-colors: active) {
    .contact__link,
    .motion-toggle {
        border-color: CanvasText;
    }
}