/* 基本設定 */
:root {
    --base-dark: #0A0A0A;
    --midnight-blue: #001F3F;
    --dark-purple: #2A0A2A;
    --electric-blue: #00FFFF;
    --cyber-pink: #FF00FF;
    --neon-green: #39FF14;
    --bright-yellow: #FFFF00;
    --silver-grey: #808080;
    --pure-white: #FFFFFF;
}

body {
    background-color: var(--base-dark);
    color: var(--pure-white);
    font-family: 'Roboto Mono', monospace;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    line-height: 1.6;
}

/* ヒーローセクション */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(10, 10, 10, 0.9), rgba(42, 10, 42, 0.8)), url('') no-repeat center center/cover;
    overflow: hidden;
}

/* グリッチエフェクト */
.glitch-container {
    position: relative;
    z-index: 1;
}

.glitch {
    position: relative;
    font-size: 6rem;
    font-weight: 700;
    font-family: 'Orbitron', sans-serif;
    color: var(--pure-white);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin: 0;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    left: 4px;
    text-shadow: -2px 0 var(--electric-blue);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim 5s infinite linear alternate-reverse;
}

.glitch::after {
    left: -4px;
    text-shadow: -2px 0 var(--cyber-pink);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim2 5s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% { clip: rect(61px, 9999px, 119px, 0); }
    20% { clip: rect(34px, 9999px, 14px, 0); }
    40% { clip: rect(80px, 9999px, 72px, 0); }
    60% { clip: rect(92px, 9999px, 98px, 0); }
    80% { clip: rect(60px, 9999px, 16px, 0); }
    100% { clip: rect(48px, 9999px, 77px, 0); }
}

@keyframes glitch-anim2 {
    0% { clip: rect(115px, 9999px, 20px, 0); }
    20% { clip: rect(145px, 9999px, 25px, 0); }
    40% { clip: rect(95px, 9999px, 16px, 0); }
    60% { clip: rect(10px, 9999px, 2px, 0); }
    80% { clip: rect(98px, 9999px, 145px, 0); }
    100% { clip: rect(1px, 9999px, 83px, 0); }
}

.subtitle {
    font-size: 1.5rem;
    margin: 2rem 0;
    color: var(--silver-grey);
    font-family: 'Roboto Mono', monospace;
}

/* ネオンボタン */
.neon-btn {
    background: transparent;
    color: var(--electric-blue);
    border: 2px solid var(--electric-blue);
    padding: 12px 30px;
    font-size: 1.2rem;
    font-family: 'Orbitron', sans-serif;
    text-transform: uppercase;
    letter-spacing: 3px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
    box-shadow: 0 0 10px var(--electric-blue), 0 0 20px var(--electric-blue), 0 0 40px var(--electric-blue);
}

.neon-btn:hover {
    background: var(--electric-blue);
    color: var(--base-dark);
    box-shadow: 0 0 20px var(--electric-blue), 0 0 40px var(--electric-blue), 0 0 80px var(--electric-blue);
}

/* スキャンライン */
.scanline {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 10px;
    background: rgba(0, 255, 255, 0.6);
    animation: scanline 8s linear infinite;
    box-shadow: 0 0 20px var(--electric-blue);
}

@keyframes scanline {
    0% { top: 0; }
    100% { top: 100%; }
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .glitch {
        font-size: 3rem;
    }
    .subtitle {
        font-size: 1rem;
    }
}