:root {
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #a855f7;
    --secondary-hover: #9333ea;
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.9)), url('bg.png') center/cover no-repeat;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 3000;
    /* モバイルメニュー(2000)より上に表示 */
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    background: linear-gradient(135deg, #60a5fa, #a855f7);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-family: sans-serif;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

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

.nav-links a.active {
    color: var(--primary);
}

.nav-links a.active::after {
    width: 100%;
}

.nav-links a i {
    margin-right: 0.5rem;
    font-size: 0.9rem;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 2001;
    padding: 0.5rem;
    transition: var(--transition);
    height: 48px;
    /* Touch target size */
    /* Touch target size */
    width: 48px;
    align-items: center;
    justify-content: center;
}

/* Footer Styles */
footer {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: 6rem 2rem 3rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
}

.footer-brand .logo {
    margin-bottom: 1.5rem;
    display: inline-block;
    font-size: 1.8rem;
}

.footer-brand p {
    color: var(--text-muted);
    line-height: 1.6;
    font-size: 0.95rem;
    max-width: 400px;
}

.footer-links h4 {
    color: var(--text-main);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
    display: block;
}

.footer-links a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.footer-bottom {
    max-width: 1200px;
    margin: 4rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        text-align: center;
    }

    .footer-brand p {
        margin: 0 auto;
    }

    .footer-links a:hover {
        transform: none;
    }
}

.hamburger:hover {
    color: var(--primary);
}

.hamburger:active {
    transform: scale(0.9);
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    z-index: 2000;
    /* ヘッダー(3000)より下に表示 */
    padding: 6rem 2rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 1px solid var(--glass-border);
    overflow-y: auto;
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu.active {
    right: 0;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.mobile-nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    transition: var(--transition);
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
}

.mobile-server-status {
    margin-top: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.mobile-server-status .sidebar-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    padding: 1.5rem;
    border-radius: 16px;
}

section {
    flex: 1;
    /* 内容が少なくてもフッターを下に押しやる */
    padding: 8rem 2rem 4rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.container {
    max-width: 1400px;
    width: 100%;
}

.main-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 2.5rem;
    width: 100%;
    align-items: start;
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    width: 100%;
}

aside.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: sticky;
    top: 8rem;
}

.sidebar-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    text-align: left;
}

.sidebar-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    border-left: 4px solid var(--primary);
    padding-left: 0.75rem;
}

.status-item {
    margin-bottom: 1.25rem;
}

.status-item:last-child {
    margin-bottom: 0;
}

.status-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.status-value {
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 8px;
    background: #94a3b8;
}

.status-online {
    background: #10b981;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.status-offline {
    background: #ef4444;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

.news-list {
    list-style: none;
}

.news-item {
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--glass-border);
}

.news-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.news-date {
    display: block;
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.news-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-main);
    line-height: 1.4;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

h1 {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.hero-text {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.info-item {
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}

.info-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.info-value {
    font-size: 1.1rem;
    font-weight: 700;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(168, 85, 247, 0.4);
}

.btn-large {
    padding: 1.5rem 3rem;
    font-size: 1.25rem;
}

.btn-sm {
    padding: 0.6rem 1.25rem;
    font-size: 0.85rem;
    border-radius: 10px;
}

.rtm-sub-heading {
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: -0.75rem;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, var(--secondary), #c084fc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.staff-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    width: 100%;
}

.staff-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    transition: var(--transition);
    text-align: center;
}

.staff-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
}

.staff-avatar {
    width: 90px;
    height: 90px;
    border-radius: 24px;
    margin-bottom: 1.5rem;
    background: #334155;
    object-fit: cover;
}

.staff-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.staff-role {
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.staff-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
}

@keyframes skeleton-loading {
    0% {
        background-color: rgba(255, 255, 255, 0.05);
    }

    100% {
        background-color: rgba(255, 255, 255, 0.1);
    }
}

.skeleton {
    animation: skeleton-loading 1s linear infinite alternate;
    border-radius: 4px;
    height: 1rem;
    margin-bottom: 0.5rem;
    width: 100%;
}

.skeleton-title {
    width: 80%;
    height: 1.25rem;
}

.skeleton-text {
    width: 100%;
    height: 0.8rem;
}

.skeleton-badge {
    width: 40px;
    border-radius: 9999px;
}

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--primary);
    color: white;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    transform: translateY(200%);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 2000;
}

.toast.show {
    transform: translateY(0);
}

.jump-link {
    color: var(--secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.jump-link:hover {
    color: var(--secondary-hover);
    transform: translateX(3px);
}

.status-private {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 400;
}

.join-status-value {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
    line-height: 1.2;
    width: 100%;
}

.join-info-box {
    margin-top: 3rem;
    padding: 2.5rem;
    /* entry-cardと合わせる */
    background: rgba(168, 85, 247, 0.05);
    border: 1px solid rgba(168, 85, 247, 0.2);
    border-radius: 20px;
    /* entry-cardと合わせる */
    text-align: left;
    width: 100%;
}

.join-title {
    font-size: 1.1rem;
    color: var(--text-main);
    margin-bottom: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.join-title i {
    color: var(--secondary);
}

.join-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.discord-link {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 800;
    border-bottom: 2px solid rgba(168, 85, 247, 0.3);
    transition: var(--transition);
}

.discord-link:hover {
    background: rgba(168, 85, 247, 0.1);
    border-bottom-color: var(--secondary);
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    width: 100%;
}

.link-item {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    text-align: center;
}

.link-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.3);
}

@media (max-width: 1100px) {
    .main-layout {
        grid-template-columns: 1fr;
    }

    aside.sidebar {
        position: static;
        order: 2;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

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

    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .glass-card {
        padding: 2rem 1.5rem;
    }

    nav {
        padding: 1rem;
    }

    /* モバイル時はサイドバー全体を非表示にする（メニュー内にあるため） */
    aside.sidebar {
        display: none;
    }
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    padding: 2.5rem;
    border-radius: 24px;
    max-width: 500px;
    width: 90%;
    text-align: center;
    transform: scale(0.9);
    transition: var(--transition);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-overlay.show .modal-content {
    transform: scale(1);
}

.modal-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.modal-text {
    color: var(--text-muted);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.entry-card {
    position: relative;
    background: rgba(168, 85, 247, 0.05);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: blur(16px);
    border: 1px solid rgba(168, 85, 247, 0.2);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    width: 100%;
    margin-top: 1.5rem;
    /* join-info-boxの下に少し離して配置 */
    transition: var(--transition);
    overflow: hidden;
    text-align: left;
}



.entry-card:hover {
    transform: translateY(-5px);
    border-color: rgba(168, 85, 247, 0.4);
    box-shadow: 0 20px 40px rgba(168, 85, 247, 0.15);
}

.entry-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    gap: 1rem;
}

.entry-card-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.entry-card-title i {
    color: var(--secondary);
    font-size: 1.2rem;
}

.entry-card-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.entry-card-list li {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.entry-card-list li:hover {
    background: rgba(168, 85, 247, 0.1);
    color: var(--text-main);
    border-color: rgba(168, 85, 247, 0.2);
    transform: translateX(5px);
}

.entry-card-list li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--secondary);
    font-size: 0.85rem;
    margin-top: 0.2rem;
}