:root {
    --text-color: #e2e8f0;
    --accent-color: #00ff88;
}

html::after {
    content: "";
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at center, transparent 20%, #000 100%);
    z-index: 1;
    pointer-events: none;
}

body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    color: var(--text-color);
    font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
    background-color: #000;
    position: relative;
    z-index: 0;
}

body::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, #4b0000 0%, transparent 70%),
                radial-gradient(circle at 70% 70%, #4b3200 0%, transparent 70%);
    animation: fade-pulse 15s ease-in-out infinite alternate;
    z-index: -2;
}

body::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 70% 30%, #001133 0%, transparent 70%),
                radial-gradient(circle at 30% 70%, #2e004b 0%, transparent 70%);
    animation: fade-pulse 20s ease-in-out infinite alternate-reverse;
    z-index: -1;
}

.container {
    text-align: center;
    position: relative;
    z-index: 10;
}

.logo {
    font-family: "Hiragino Maru Gothic ProN", "ヒラギノ丸ゴ ProN W4", "Arial Rounded MT Bold", "Quicksand", "Inter", sans-serif;
    font-size: 3.5rem;
    font-weight: 100;
    letter-spacing: -0.02em;
    margin: 0;
    text-shadow: 0 0 10px #0ff, 0 0 40px rgba(255,255,255,0.5);
}

.status {
    display: inline-flex;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 500;
    color: #888;
    margin-top: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.25em;
}

.status::before {
    content: "";
    width: 8px;
    height: 8px;
    background-color: var(--accent-color);
    border-radius: 50%;
    margin-right: 12px;
    box-shadow: 0 0 10px var(--accent-color), 0 0 20px rgba(0, 255, 136, 0.4);
    animation: led-blink 4s ease-in-out infinite;
}

.status::after {
    content: "";
    display: inline-block;
    width: 1.5em;
    text-align: left;
    animation: dot-loading 4s steps(4, end) infinite;
}

footer {
    position: absolute;
    bottom: 2rem;
    font-size: 0.75rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    opacity: 0.9;
    z-index: 9;
}

@keyframes fade-pulse {
    0% { opacity: 0.2; }
    100% { opacity: 0.8; }
}

@keyframes led-blink {
    0%, 100% { opacity: 1; transform: scale(1); filter: brightness(1); }
    50% { opacity: 0.3; transform: scale(0.9); filter: brightness(0.7); }
}

@keyframes dot-loading {
    0%   { content: ""; }
    25%  { content: "."; }
    50%  { content: ".."; }
    75%  { content: "..."; }
    100% { content: ""; }
}