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

:root {
    --primary-red: #FF0000;
    --primary-black: #000000;
    --dark-bg: #0a0a0a;
    --dark-accent: #1a1a1a;
    --text-white: #FFFFFF;
    --text-gray: #CCCCCC;
    --hover-red: #CC0000;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--primary-black);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ナビゲーション */
nav {
    background: rgba(0, 0, 0, 0.95);
    padding: 1rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--primary-red);
    backdrop-filter: blur(10px);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

nav a {
    color: var(--text-white);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 1rem;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-red);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

nav a:hover::after {
    width: 80%;
}

nav a:hover {
    color: var(--primary-red);
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(255, 0, 0, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

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

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-white) 0%, var(--primary-red) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-gray);
    animation: fadeInUp 1s ease 0.2s both;
}

/* サーバーカード */
.servers-container {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

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

.server-card {
    background: var(--dark-accent);
    border: 2px solid var(--primary-red);
    border-radius: 10px;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.server-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 0, 0, 0.1), transparent);
    transition: left 0.5s ease;
}

.server-card:hover::before {
    left: 100%;
}

.server-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(255, 0, 0, 0.3);
    border-color: var(--hover-red);
}

.server-card h2 {
    color: var(--primary-red);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.server-card p {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

.server-card .features {
    list-style: none;
    margin-bottom: 1.5rem;
}

.server-card .features li {
    padding: 0.5rem 0;
    color: var(--text-white);
    position: relative;
    padding-left: 1.5rem;
}

.server-card .features li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--primary-red);
}

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--primary-red);
    color: var(--text-white);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid var(--primary-red);
}

.btn:hover {
    background: transparent;
    color: var(--primary-red);
    transform: scale(1.05);
}

/* セクション */
.section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--primary-red);
}

/* フッター */
footer {
    background: var(--dark-bg);
    padding: 2rem;
    text-align: center;
    border-top: 2px solid var(--primary-red);
    margin-top: 4rem;
}

footer p {
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

footer a {
    color: var(--primary-red);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--hover-red);
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* レスポンシブ */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
    
    nav ul {
        gap: 1rem;
    }
    
    .servers-grid {
        grid-template-columns: 1fr;
    }
}

/* ローディング */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 0, 0, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-red);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* サーバーページ専用スタイル */
.server-hero {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 6rem 2rem 2rem;
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--dark-bg) 100%);
    position: relative;
}

.server-hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--primary-red);
}

.server-hero .invite-btn {
    margin-top: 2rem;
    font-size: 1.2rem;
    padding: 1rem 3rem;
}

.info-section {
    background: var(--dark-accent);
    padding: 3rem 2rem;
    margin: 2rem 0;
    border-radius: 10px;
    border-left: 4px solid var(--primary-red);
}

.info-section h3 {
    color: var(--primary-red);
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.info-section ul {
    list-style: none;
    padding-left: 0;
}

.info-section ul li {
    padding: 0.75rem 0;
    color: var(--text-gray);
    border-bottom: 1px solid rgba(255, 0, 0, 0.1);
    padding-left: 1.5rem;
    position: relative;
}

.info-section ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-red);
}

.info-section ul li:last-child {
    border-bottom: none;
}

/* 関係URLセクション */
.related-urls-section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    background: var(--dark-bg);
    border-top: 2px solid var(--primary-red);
    border-bottom: 2px solid var(--primary-red);
}

.related-urls-section h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--primary-red);
    animation: pulse 2s ease-in-out infinite;
}

.urls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.url-card {
    background: var(--dark-accent);
    border: 2px solid var(--primary-red);
    border-radius: 10px;
    padding: 1.5rem;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(50px) scale(0.8);
    animation: slideInUp 0.6s ease forwards;
}

.url-card:nth-child(1) { animation-delay: 0.1s; }
.url-card:nth-child(2) { animation-delay: 0.2s; }
.url-card:nth-child(3) { animation-delay: 0.3s; }
.url-card:nth-child(4) { animation-delay: 0.4s; }
.url-card:nth-child(5) { animation-delay: 0.5s; }
.url-card:nth-child(6) { animation-delay: 0.6s; }
.url-card:nth-child(7) { animation-delay: 0.7s; }
.url-card:nth-child(8) { animation-delay: 0.8s; }

.url-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 0, 0, 0.1) 0%, transparent 70%);
    transform: rotate(45deg);
    transition: all 0.6s ease;
    opacity: 0;
}

.url-card:hover::before {
    opacity: 1;
    transform: rotate(45deg) translate(50%, 50%);
}

.url-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 2px solid var(--primary-red);
    border-radius: 10px;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.4s ease;
}

.url-card:hover::after {
    opacity: 1;
    transform: scale(1.05);
    animation: borderPulse 1.5s ease infinite;
}

.url-card:hover {
    transform: translateY(-15px) scale(1.05) rotate(2deg);
    box-shadow: 0 20px 40px rgba(255, 0, 0, 0.4);
    border-color: var(--hover-red);
    background: linear-gradient(135deg, var(--dark-accent) 0%, rgba(255, 0, 0, 0.05) 100%);
}

.url-card a {
    color: var(--text-white);
    text-decoration: none;
    display: block;
    font-weight: 600;
    font-size: 1.1rem;
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.url-card a:hover {
    color: var(--primary-red);
    transform: translateX(10px);
}

.url-card a::before {
    content: '→';
    position: absolute;
    left: -20px;
    opacity: 0;
    transition: all 0.3s ease;
    color: var(--primary-red);
}

.url-card a:hover::before {
    left: -30px;
    opacity: 1;
}

/* 作成者セクション */
.creator-section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-black) 100%);
    position: relative;
    overflow: hidden;
}

.creator-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 0, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 0, 0, 0.1) 0%, transparent 50%);
    animation: backgroundMove 20s ease-in-out infinite;
    pointer-events: none;
}

.creator-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-red);
    animation: fadeInScale 1s ease;
    position: relative;
    z-index: 1;
}

.creator-section p {
    color: var(--text-gray);
    font-size: 1.2rem;
    margin-bottom: 2rem;
    animation: fadeInScale 1s ease 0.2s both;
    position: relative;
    z-index: 1;
}

.creator-section a {
    color: var(--primary-red);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.3rem;
    transition: all 0.3s ease;
    display: inline-block;
    position: relative;
    z-index: 1;
    padding: 1rem 2rem;
    border: 2px solid var(--primary-red);
    border-radius: 5px;
    animation: fadeInScale 1s ease 0.4s both;
}

.creator-section a:hover {
    background: var(--primary-red);
    color: var(--text-white);
    transform: scale(1.1) rotate(2deg);
    box-shadow: 0 10px 30px rgba(255, 0, 0, 0.5);
}

/* 追加アニメーション */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.8) rotate(-5deg);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1) rotate(0deg);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
}

@keyframes borderPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 0, 0, 0.7);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(255, 0, 0, 0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes backgroundMove {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(20px, 20px);
    }
}

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

@keyframes glow {
    0%, 100% {
        text-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
    }
    50% {
        text-shadow: 0 0 20px rgba(255, 0, 0, 0.8), 0 0 30px rgba(255, 0, 0, 0.5);
    }
}

/* ナビゲーションアニメーション強化 */
nav {
    animation: slideDown 0.5s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ヒーローアニメーション強化 */
.hero h1 {
    animation: fadeInUp 1s ease, glow 3s ease-in-out infinite 1s;
}

.hero p {
    animation: fadeInUp 1s ease 0.2s both, float 3s ease-in-out infinite 1.2s;
}

/* サーバーカードアニメーション強化 */
.server-card {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.server-card:nth-child(1) {
    animation-delay: 0.1s;
}

.server-card:nth-child(2) {
    animation-delay: 0.3s;
}

.server-card h2 {
    animation: fadeInScale 0.6s ease 0.2s both;
}

/* ボタンアニメーション強化 */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

/* スクロールアニメーション */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* パーティクルエフェクト */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--primary-red);
    border-radius: 50%;
    animation: particleFloat 10s infinite;
    opacity: 0.5;
}

@keyframes particleFloat {
    0% {
        transform: translateY(100vh) translateX(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.5;
    }
    90% {
        opacity: 0.5;
    }
    100% {
        transform: translateY(-100vh) translateX(100px) rotate(360deg);
        opacity: 0;
    }
}