:root {
    --logo-min: 2.4rem;
    --logo-max: 6rem;
    --overlay-color: rgba(0, 0, 0, 0.38);
    --text-color: #ffffff;
    --shadow: 0 0 20px rgba(0, 0, 0, 0.6);
    --transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
    background: #000;
    color: var(--text-color);
    height: 100dvh;
}

.video-container {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100dvh;
    overflow: hidden;
    z-index: -2;
    background: #000;
}

#bg-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: brightness(0.75) contrast(1.05);
    will-change: transform;
}

.video-overlay {
    position: fixed;
    inset: 0;
    background: var(--overlay-color);
    z-index: -1;
    pointer-events: none;
}

.logo {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(var(--logo-min), 9vw + 1rem, var(--logo-max));
    font-weight: 900;
    letter-spacing: 0.24em;
    color: var(--text-color);
    text-shadow: var(--shadow);
    text-transform: uppercase;
    user-select: none;
    z-index: 10;
    transition: var(--transition);
    will-change: transform;
}

.logo:hover,
.logo:focus-visible {
    transform: scale(1.08);
    outline: none;
}

@media (max-width: 480px) {
    .logo {
        font-size: clamp(2.1rem, 8.5vw + 0.8rem, 3.4rem);
        letter-spacing: 0.14em;
    }
}

@media (prefers-reduced-motion: reduce) {
    .logo {
        transition: none;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --overlay-color: rgba(0, 0, 0, 0.45);
    }
}