:root {
    --deep-black: #0A0A0A;
    --midnight-blue: #001F3F;
    --cyber-purple: #2A0A2A;
    --electric-blue: #00FFFF;
    --cyber-pink: #FF00FF;
    --neon-green: #39FF14;
    --bright-yellow: #FFFF00;
    --silver-gray: #808080;
}

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

body {
    background: var(--deep-black);
    color: var(--silver-gray);
    font-family: 'Roboto Mono', monospace;
    overflow-x: hidden;
    position: relative;
}

/* グリッチエフェクト */
.glitch-text {
    font-family: 'Orbitron', sans-serif;
    font-size: 4rem;
    color: var(--electric-blue);
    text-shadow: 
        0 0 10px var(--electric-blue),
        0 0 20px var(--electric-blue),
        0 0 30px var(--cyber-pink);
    animation: glitch 2s infinite;
}

@keyframes glitch {
    0% { transform: translate(0); }
    20% { transform: translate(-3px, 3px); }
    40% { transform: translate(-3px, -3px); }
    60% { transform: translate(3px, 3px); }
    80% { transform: translate(3px, -3px); }
    100% { transform: translate(0); }
}

/* サイバーボタン */
.cyber-button {
    background: linear-gradient(45deg, var(--electric-blue), var(--cyber-pink));
    color: var(--deep-black);
    border: none;
    padding: 15px 40px;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px var(--electric-blue);
}

.cyber-button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--cyber-pink);
}

/* ヒーローセクション */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, rgba(0, 255, 255, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 80% 80%, rgba(255, 0, 255, 0.1) 0%, transparent 20%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    z-index: 1;
}

.cyber-subtext {
    font-size: 1.5rem;
    margin: 20px 0;
    color: var(--neon-green);
    text-shadow: 0 0 5px var(--neon-green);
}

/* パーティクルエフェクト */
.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--electric-blue);
    border-radius: 50%;
    opacity: 0.7;
    animation: float 5s infinite linear;
}

@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(calc(var(--x) * 100px), calc(var(--y) * 100px)); }
}

/* HUD風ナビゲーション */
.hud-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--electric-blue);
}

.hamburger {
    background: none;
    border: none;
    color: var(--electric-blue);
    font-size: 2rem;
    cursor: pointer;
    padding: 10px;
    position: relative;
    transition: all 0.3s ease;
}

.hamburger:hover {
    text-shadow: 0 0 10px var(--electric-blue);
    animation: glitch 0.5s infinite;
}

.hud-nav {
    display: flex;
    gap: 30px;
}

.hud-nav a {
    color: var(--silver-gray);
    text-decoration: none;
    font-family: 'Orbitron', sans-serif;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: all 0.3s ease;
}

.hud-nav a:hover {
    color: var(--electric-blue);
    text-shadow: 0 0 5px var(--electric-blue);
}

.hud-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--electric-blue);
    transition: width 0.3s ease;
}

.hud-nav a:hover::after {
    width: 100%;
}

/* フッタースタイル */
.cyber-footer {
    background: rgba(10, 10, 10, 0.95);
    border-top: 1px solid var(--electric-blue);
    padding: 40px 0;
    margin-top: 100px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

.footer-logo {
    flex: 1;
    min-width: 200px;
}

.glitch-text-small {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    color: var(--electric-blue);
    text-shadow: 0 0 10px var(--electric-blue);
    animation: glitch 3s infinite;
}

.footer-links {
    flex: 1;
    display: flex;
    gap: 20px;
}

.cyber-link {
    color: var(--silver-gray);
    text-decoration: none;
    font-family: 'Orbitron', sans-serif;
    font-weight: 500;
    position: relative;
    padding-bottom: 5px;
    transition: all 0.3s ease;
}

.cyber-link:hover {
    color: var(--electric-blue);
    text-shadow: 0 0 5px var(--electric-blue);
}

.cyber-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--electric-blue);
    transition: width 0.3s ease;
}

.cyber-link:hover::after {
    width: 100%;
}

.footer-social {
    flex: 1;
    display: flex;
    gap: 15px;
}

.social-icon {
    color: var(--silver-gray);
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.social-icon:hover {
    color: var(--electric-blue);
    text-shadow: 0 0 10px var(--electric-blue);
    transform: translateY(-3px);
}

.copyright {
    color: var(--silver-gray);
    font-size: 0.9rem;
    margin-top: 20px;
    text-align: center;
    width: 100%;
}

/* モバイル対応 */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links, .footer-social {
        width: 100%;
        justify-content: center;
    }
    
    .hud-header {
        padding: 15px 20px;
    }
    
    .hud-nav {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 250px;
        height: calc(100vh - 70px);
        background: rgba(10, 10, 10, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        padding-top: 40px;
        transition: right 0.4s ease;
        border-left: 1px solid var(--electric-blue);
    }
    
    .hud-nav.active {
        right: 0;
    }
    
    .hud-nav a {
        writing-mode: vertical-rl;
        transform: rotate(180deg);
        margin: 20px 0;
        font-size: 1.2rem;
    }
    
    .hamburger {
        font-size: 2.5rem;
    }
    
    .glitch-text {
        font-size: 3rem;
    }
    .cyber-button {
        padding: 12px 30px;
        font-size: 1rem;
    }
    .cyber-subtext {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .footer-content {
        padding: 20px;
    }
    
    .glitch-text-small {
        font-size: 1.5rem;
    }
    
    .hud-nav {
        width: 200px;
    }
    
    .glitch-text {
        font-size: 2.5rem;
    }
    .cyber-button {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    .cyber-subtext {
        font-size: 1rem;
    }
    .hero {
        height: 90vh;
    }
}