:root {
    --bg-main: #1a1a1a;
    --panel-bg: #252525;
    --text-main: #00ffcc;
    --text-sub: #ffcc00;
    --line: #333;
    --muted: #888;
}

* {
    box-sizing: border-box;
}

body {
    background:
        radial-gradient(circle at 20% 20%, rgba(0, 255, 204, 0.08), transparent 28%),
        radial-gradient(circle at 80% 80%, rgba(255, 204, 0, 0.08), transparent 32%),
        var(--bg-main);
    color: var(--text-main);
    font-family: 'Courier New', monospace;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    cursor: none;
    overflow: hidden;
}

h1 {
    border-bottom: 2px solid var(--text-main);
    padding-bottom: 10px;
    margin-top: 0;
}

.lab-status {
    color: var(--text-sub);
}

.container {
    width: min(760px, 100%);
    text-align: center;
    border: 1px solid var(--line);
    padding: 40px 28px;
    border-radius: 12px;
    background: var(--panel-bg);
    box-shadow: 0 0 32px rgba(0, 255, 204, 0.08);
}

.actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 22px;
}

.jump-btn {
    display: inline-block;
    color: var(--text-main);
    text-decoration: none;
    border: 1px solid var(--text-main);
    border-radius: 8px;
    padding: 10px 16px;
    min-width: 190px;
    transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.jump-btn:hover {
    background: var(--text-main);
    color: #121212;
    transform: translateY(-2px);
}

.divider {
    border: 0.5px solid var(--line);
    width: 100%;
    margin-top: 20px;
}

.footer-note {
    font-size: 0.82em;
    color: var(--muted);
    margin-top: 22px;
}

.cursor-dot {
    position: fixed;
    left: 0;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    pointer-events: none;
    background: var(--text-main);
    box-shadow: 0 0 14px rgba(0, 255, 204, 0.9);
    transform: translate(-50%, -50%);
    z-index: 9999;
}

.cursor-ring {
    position: fixed;
    left: 0;
    top: 0;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    pointer-events: none;
    border: 1px solid rgba(0, 255, 204, 0.8);
    transform: translate(-50%, -50%);
    z-index: 9998;
    transition: width 0.2s ease, height 0.2s ease, border-color 0.2s ease;
}

.cursor-ring.active {
    width: 40px;
    height: 40px;
    border-color: rgba(255, 204, 0, 0.9);
}

.bubble {
    position: fixed;
    left: 0;
    top: 0;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    pointer-events: none;
    border: 1px solid currentColor;
    transform: translate(-50%, -50%);
    opacity: 0.9;
    animation: floatFade 780ms ease-out forwards;
    z-index: 9997;
}

.bubble.large {
    width: 20px;
    height: 20px;
}

@keyframes floatFade {
    0% {
        transform: translate(-50%, -50%) scale(0.7);
        opacity: 0.9;
    }
    100% {
        transform: translate(-50%, calc(-50% - 50px)) scale(1.6);
        opacity: 0;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 30px 18px;
    }

    .jump-btn {
        width: 100%;
        min-width: unset;
    }
}