:root {
    /* キーカラーパレット */
    --deep-black: #0A0A0A;
    --midnight-blue: #001F3F;
    --dark-purple: #2A0A2A;
    --electric-blue: #00FFFF;
    --cyber-pink: #FF00FF;
    --neon-green: #39FF14;
    --bright-yellow: #FFFF00;
    --silver-gray: #808080;
    --white: #FFFFFF;

    /* エフェクト用 */
    --glitch-offset: 4px;
    --pulse-duration: 2s;
}

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

body {
    font-family: 'Roboto Mono', monospace;
    background-color: var(--deep-black);
    color: var(--silver-gray);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* パーティクル背景 */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}

/* ナビゲーション */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--electric-blue);
}

.nav-logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--neon-green);
    text-shadow: 0 0 10px var(--neon-green), 0 0 20px var(--neon-green);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    font-family: 'Orbitron', sans-serif;
    color: var(--silver-gray);
    text-decoration: none;
    font-size: 0.9rem;
    letter-spacing: 2px;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--electric-blue);
    transition: width 0.3s ease;
}

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

/* ヒーローセクション */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 2rem;
    position: relative;
    background: linear-gradient(135deg, var(--deep-black) 0%, var(--midnight-blue) 100%);
}

.hero-content {
    max-width: 800px;
    z-index: 1;
}

.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--white);
}

.glitch {
    position: relative;
    text-shadow: 0.05em 0 0 rgba(255, 0, 255, 0.75), -0.025em -0.05em 0 rgba(0, 255, 255, 0.75), 0.025em 0.05em 0 rgba(255, 255, 0, 0.75);
    animation: glitch 2s infinite;
}

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

.glitch::before {
    left: var(--glitch-offset);
    text-shadow: 0.05em 0 0 rgba(255, 0, 255, 0.75);
    animation: glitch-before 2s infinite;
    clip-path: polygon(0 0, 100% 0, 100% 60%, 0 60%);
}

.glitch::after {
    left: calc(var(--glitch-offset) * -1);
    text-shadow: 0.05em 0 0 rgba(0, 255, 255, 0.75);
    animation: glitch-after 2s infinite;
    clip-path: polygon(0 70%, 100% 70%, 100% 100%, 0 100%);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--electric-blue);
    text-shadow: 0 0 5px var(--electric-blue);
}

.cta-button {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.1rem;
    padding: 1rem 2.5rem;
    background: transparent;
    color: var(--neon-green);
    border: 2px solid var(--neon-green);
    border-radius: 0;
    cursor: pointer;
    letter-spacing: 2px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--neon-green);
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}

.cta-button:hover {
    color: var(--deep-black);
    border-color: var(--bright-yellow);
    box-shadow: 0 0 20px var(--neon-green), 0 0 40px var(--neon-green);
}

.cta-button:hover::before {
    opacity: 0.1;
}

.pulse-glow {
    animation: pulse var(--pulse-duration) ease-in-out infinite alternate;
}

/* セクション共通スタイル */
.section {
    padding: 6rem 5%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--white);
    text-align: center;
}

/* イントロダクション */
.intro {
    background: linear-gradient(to bottom, var(--deep-black), var(--dark-purple));
}

.intro-content {
    max-width: 800px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
    text-align: center;
}

.intro-content strong {
    color: var(--cyber-pink);
}

.visual-circuit {
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--electric-blue), transparent);
    box-shadow: 0 0 10px var(--electric-blue);
    animation: scan 4s linear infinite;
}

/* 特徴セクション */
.features {
    background-color: #0f0f0f;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: rgba(16, 16, 16, 0.8);
    border: 1px solid var(--electric-blue);
    border-radius: 0;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(5px);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 255, 255, 0.2);
    border-color: var(--neon-green);
}

.icon-glow {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 0 0 10px currentColor;
}

.feature-card h3 {
    font-family: 'Orbitron', sans-serif;
    color: var(--neon-green);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--silver-gray);
    font-size: 0.95rem;
}

/* 技術詳細セクション */
.tech {
    background: linear-gradient(135deg, var(--midnight-blue), var(--deep-black));
}

.tech-diagram {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    position: relative;
}

.node {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 0.9rem;
    text-align: center;
    position: relative;
    z-index: 2;
    animation: float 6s ease-in-out infinite;
}

.node.primary {
    background: conic-gradient(from 0deg, var(--electric-blue), var(--cyber-pink), var(--neon-green), var(--electric-blue));
    color: var(--deep-black);
    box-shadow: 0 0 30px var(--electric-blue);
}

.node.secondary {
    background: rgba(0, 0, 0, 0.8);
    border: 2px dashed var(--electric-blue);
    color: var(--electric-blue);
    box-shadow: 0 0 15px var(--electric-blue);
}

.node.tertiary {
    background: rgba(0, 0, 0, 0.8);
    border: 2px dashed var(--cyber-pink);
    color: var(--cyber-pink);
    box-shadow: 0 0 15px var(--cyber-pink);
}

.connection {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--silver-gray);
    z-index: 1;
    opacity: 0.3;
}

/* CTAセクション */
.cta {
    background: linear-gradient(to bottom, var(--dark-purple), var(--deep-black));
    text-align: center;
}

.cta-sub {
    font-size: 1.3rem;
    color: var(--bright-yellow);
    margin-bottom: 2rem;
    text-shadow: 0 0 10px var(--bright-yellow);
}

.cta-button.large {
    padding: 1.5rem 3rem;
    font-size: 1.3rem;
}

.countdown {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    color: var(--neon-green);
}

.countdown .digit {
    min-width: 60px;
    padding: 0.5rem;
    border: 1px solid var(--neon-green);
    border-radius: 4px;
    background: rgba(57, 255, 20, 0.1);
    box-shadow: 0 0 10px var(--neon-green);
}

.countdown .label {
    font-size: 0.6em;
    display: block;
    color: var(--silver-gray);
}

/* フッター */
.footer {
    background-color: #050505;
    padding: 3rem 5% 2rem;
    border-top: 1px solid var(--silver-gray);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 1.5rem 0;
}

.footer-link {
    color: var(--silver-gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--electric-blue);
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
}

.social-icon {
    color: var(--silver-gray);
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-icon:hover {
    color: var(--neon-green);
    transform: scale(1.2);
}

/* グリッチエフェクト (共通) */
.glitch-effect {
    position: relative;
    color: var(--white);
}

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

.glitch-effect::before {
    left: 2px;
    text-shadow: -1px 0 var(--cyber-pink);
    animation: glitch-shift 2s infinite linear alternate-reverse;
    clip-path: polygon(20% 0, 80% 0, 80% 30%, 20% 30%);
}

.glitch-effect::after {
    left: -2px;
    text-shadow: 1px 0 var(--electric-blue);
    animation: glitch-shift 3s infinite linear alternate-reverse;
    clip-path: polygon(30% 70%, 70% 70%, 70% 100%, 30% 100%);
}

/* アニメーション */
@keyframes glitch {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
}

@keyframes glitch-before {
    0%, 100% { transform: translate(0, -1px); }
    20% { transform: translate(-2px, 1px); }
    40% { transform: translate(-1px, -2px); }
    60% { transform: translate(1px, 1px); }
    80% { transform: translate(2px, -1px); }
}

@keyframes glitch-after {
    0%, 100% { transform: translate(0, 1px); }
    20% { transform: translate(2px, -1px); }
    40% { transform: translate(1px, 2px); }
    60% { transform: translate(-1px, -1px); }
    80% { transform: translate(-2px, 1px); }
}

@keyframes glitch-shift {
    0% { clip-path: inset(40% 0 40% 0); transform: translate(0); }
    20% { clip-path: inset(20% 10% 60% 20%); transform: translate(2px, -1px); }
    40% { clip-path: inset(60% 20% 20% 10%); transform: translate(-1px, 2px); }
    60% { clip-path: inset(30% 30% 50% 30%); transform: translate(1px, -2px); }
    80% { clip-path: inset(50% 15% 30% 15%); transform: translate(-2px, 1px); }
    100% { clip-path: inset(45% 0 45% 0); transform: translate(0); }
}

@keyframes scan {
    0% { background-position: -100% 0; }
    100% { background-position: 100% 0; }
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(57, 255, 20, 0.7); }
    100% { box-shadow: 0 0 0 15px rgba(57, 255, 20, 0); }
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* レスポンシブ */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .nav-menu {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.8rem;
    }

    .section {
        padding: 4rem 5%;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .countdown {
        flex-direction: column;
        gap: 1rem;
    }

    .countdown .digit {
        min-width: 80px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .cta-button, .cta-button.large {
        padding: 1rem 2rem;
        font-size: 1rem;
    }

    .countdown .digit {
        min-width: 60px;
        font-size: 1.5rem;
    }
}