:root {
    --bg-color: #0d0d1a;
    --neon-cyan: #f39c12;
    --neon-pink: #8e44ad;
    --neon-yellow: #f1c40f;
    --text-color: #fff;
    --text-muted: #aaa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'M PLUS Rounded 1c', 'Noto Sans JP', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

.background-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 200vw;
    height: 200vh;
    background-image:
        linear-gradient(rgba(243, 156, 18, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(243, 156, 18, 0.1) 1px, transparent 1px);
    background-size: 40px 40px;
    transform: perspective(500px) rotateX(60deg) translateY(-100px) translateZ(-200px);
    animation: gridMove 20s linear infinite;
    z-index: -2;
    pointer-events: none;
}

@keyframes gridMove {
    0% { transform: perspective(500px) rotateX(60deg) translateY(0) translateZ(-200px); }
    100% { transform: perspective(500px) rotateX(60deg) translateY(40px) translateZ(-200px); }
}

.hero-section {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 20px;
    background: radial-gradient(circle at center, rgba(142, 68, 173, 0.2) 0%, rgba(0, 0, 0, 0) 60%);
}

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

.glitch {
    font-size: 4rem;
    font-weight: 900;
    text-transform: uppercase;
    position: relative;
    color: var(--text-color);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.8), 0 0 20px var(--neon-cyan), 0 0 30px var(--neon-cyan);
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: 40px;
    letter-spacing: 1px;
    text-shadow: 0 0 5px var(--neon-pink);
    font-weight: 700;
}

.cta-container { margin-top: 30px; }

.neon-btn {
    position: relative;
    display: inline-block;
    padding: 15px 40px;
    color: var(--neon-cyan);
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    text-transform: uppercase;
    overflow: hidden;
    transition: 0.5s;
    letter-spacing: 4px;
    background: rgba(243, 156, 18, 0.05);
    border: 1px solid var(--neon-cyan);
    box-shadow: 0 0 10px rgba(243, 156, 18, 0.2);
    border-radius: 5px;
}

.neon-btn:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 10px var(--neon-cyan), 0 0 40px var(--neon-cyan), 0 0 80px var(--neon-cyan);
}

.features {
    padding: 100px 20px;
    background: rgba(0, 0, 0, 0.8);
    position: relative;
    z-index: 10;
    border-top: 1px solid rgba(243, 156, 18, 0.2);
}

.section-title {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 60px;
    letter-spacing: 2px;
}

.highlight {
    color: var(--neon-pink);
    text-shadow: 0 0 10px var(--neon-pink);
}

.feature-cards {
    display: flex;
    justify-content: center;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.card {
    background: rgba(20, 20, 20, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    flex: 1;
    min-width: 300px;
    transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
    backdrop-filter: blur(10px);
}

.card:hover {
    transform: translateY(-10px);
    border-color: var(--neon-cyan);
    box-shadow: 0 10px 30px rgba(243, 156, 18, 0.15);
}

.card .icon { font-size: 3rem; margin-bottom: 20px; }
.card h3 { color: var(--neon-cyan); margin-bottom: 15px; font-size: 1.5rem; }
.card p { color: var(--text-muted); font-size: 1rem; }

.bottom-cta {
    padding: 100px 20px;
    text-align: center;
    background: radial-gradient(circle at center, rgba(243, 156, 18, 0.1) 0%, rgba(0, 0, 0, 0.9) 60%);
    position: relative;
    z-index: 10;
}

.bottom-cta h2 { font-size: 2.5rem; margin-bottom: 40px; }
.neon-btn.large { font-size: 1.8rem; padding: 20px 60px; }

footer {
    text-align: center;
    padding: 30px;
    background: #000;
    color: #555;
    font-size: 0.9rem;
    border-top: 1px solid #222;
    position: relative;
    z-index: 10;
}

@media (max-width: 768px) {
    .glitch { font-size: 2.5rem; }
    .subtitle { font-size: 1.2rem; }
    .section-title { font-size: 2rem; }
}

.back-to-portal {
    position: absolute;
    top: 20px;
    left: 20px;
    color: var(--neon-cyan);
    font-size: 0.9rem;
    text-decoration: none;
    font-weight: bold;
    letter-spacing: 2px;
    border: 1px solid var(--neon-cyan);
    padding: 8px 15px;
    border-radius: 5px;
    z-index: 1000;
    transition: 0.3s;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.back-to-portal:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 10px var(--neon-cyan);
}

/* Ranking styles */
.ranking-section {
    padding: 100px 20px;
    background: rgba(0, 0, 0, 0.6);
    position: relative;
    z-index: 10;
}
.ranking-desc { text-align: center; margin-bottom: 30px; font-size: 1.2rem; color: var(--text-muted); }
.ranking-board { max-width: 600px; margin: 0 auto; background: rgba(0,0,0,0.5); padding: 20px; border-radius: 10px; border: 1px solid rgba(243,156,18,0.2); }
.ranking-list { list-style: none; padding: 0; color: #fff; }
.ranking-item { padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.1); display: flex; justify-content: space-between; }


/* A8.net Ad Responsive */
.ad-pc { display: block; margin: 0 auto; }
.ad-sp { display: none; margin: 0 auto; }
@media (max-width: 768px) {
    .ad-pc { display: none; }
    .ad-sp { display: block; }
}