:root {
    --hub-bg: #fff5f5;
    --hub-surface: #ffffff;
    --hub-text: #111827;
    --hub-muted: #64748b;
    --hub-border: #fee2e2;
    --hub-primary: #dc2626;
    --hub-primary-strong: #b91c1c;
    --hub-primary-soft: #fef2f2;
    --hub-warn-text: #92400e;
    --hub-warn-bg: #fffbeb;
    --hub-shadow: 0 12px 32px rgba(220, 38, 38, 0.08);
}

* {
    box-sizing: border-box;
}

body.hub-page {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    background: radial-gradient(circle at top right, #fee2e2 0%, var(--hub-bg) 42%, #fff7f7 100%);
    color: var(--hub-text);
}

body.hub-page .header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    height: 72px;
    transition: all 0.3s ease;
}

body.hub-page .nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

body.hub-page .nav-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

body.hub-page .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--hub-text);
    text-decoration: none;
    transition: all 0.3s ease;
}

body.hub-page .logo:hover {
    transform: translateY(-1px);
}

body.hub-page .logo-icon {
    font-size: 1.8rem;
}

body.hub-page .logo-text {
    white-space: nowrap;
}

body.hub-page .beta-badge {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-left: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

body.hub-page .nav-center {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
    max-width: 560px;
    margin: 0 24px;
    padding: 4px;
    border-radius: 9999px;
    border: 1px solid #e2e8f0;
    background: color-mix(in srgb, #ffffff 72%, transparent);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

body.hub-page .nav-link {
    text-decoration: none;
    color: #475569;
    font-weight: 600;
    font-size: 0.86rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 9px 16px;
    white-space: nowrap;
    border-radius: 9999px;
    cursor: pointer;
    flex: 1;
    text-align: center;
    overflow: visible;
}

body.hub-page .nav-link:hover {
    color: var(--hub-primary);
    background: color-mix(in srgb, #f8fafc 86%, transparent);
}

body.hub-page .nav-link.active {
    color: var(--hub-primary);
    background: color-mix(in srgb, #f8fafc 94%, transparent);
}

body.hub-page .nav-link .tab-lamp {
    display: none;
}

body.hub-page .nav-link.active .tab-lamp {
    display: block;
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 4px;
    border-radius: 9999px 9999px 0 0;
    background: var(--hub-primary);
    box-shadow: 0 0 12px rgba(220, 38, 38, 0.35);
}

body.hub-page .nav-link.active .tab-lamp::before {
    content: '';
    position: absolute;
    width: 44px;
    height: 18px;
    border-radius: 9999px;
    background: rgba(220, 38, 38, 0.18);
    filter: blur(7px);
    top: -8px;
    left: -6px;
}

body.hub-page .nav-right {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: flex-end;
}

body.hub-page .button-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

body.hub-page .auth-btn {
    border: 1px solid transparent;
    padding: 8px 16px;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    backdrop-filter: blur(6px);
}

body.hub-page .auth-btn-secondary {
    border-color: #d1d5db;
    color: #1f2937;
    background: color-mix(in srgb, #ffffff 86%, transparent);
}

body.hub-page .auth-btn-secondary:hover {
    background: color-mix(in srgb, #f8fafc 92%, transparent);
    border-color: #fca5a5;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.12);
}

body.hub-page .auth-btn-primary {
    background: linear-gradient(135deg, var(--hub-primary), var(--hub-primary-strong));
    border-color: var(--hub-primary);
    color: #fff;
    box-shadow: 0 8px 18px rgba(220, 38, 38, 0.28);
}

body.hub-page .auth-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 22px rgba(220, 38, 38, 0.38);
}

.hub-container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 106px 20px 56px;
}

.hub-hero,
.hub-card {
    background: var(--hub-surface);
    border: 1px solid var(--hub-border);
    border-radius: 16px;
    box-shadow: var(--hub-shadow);
}

.hub-hero {
    padding: 30px;
    margin-bottom: 18px;
}

.hub-card {
    padding: 22px;
    margin-bottom: 14px;
}

.hub-title {
    margin: 0 0 12px;
    font-size: 32px;
    line-height: 1.2;
}

.hub-subtitle {
    margin: 0;
    line-height: 1.75;
    color: #475569;
}

.hub-section-title {
    margin: 30px 0 14px;
    font-size: 18px;
    color: #7f1d1d;
}

.hub-tag {
    display: inline-flex;
    align-items: center;
    padding: 5px 11px;
    border-radius: 999px;
    font-size: 12px;
    line-height: 1;
    background: var(--hub-primary-soft);
    color: var(--hub-primary);
    margin-bottom: 12px;
    font-weight: 600;
}

.hub-tag-warn {
    background: var(--hub-warn-bg);
    color: var(--hub-warn-text);
}

.hub-meta {
    margin: 0 0 12px;
    color: var(--hub-muted);
    font-size: 13px;
}

.hub-item-title {
    margin: 0 0 8px;
    font-size: 21px;
    color: var(--hub-text);
}

.hub-body {
    margin: 0 0 12px;
    color: #475569;
    line-height: 1.72;
}

.hub-actions {
    margin-top: 14px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.hub-btn {
    border: 1px solid transparent;
    text-decoration: none;
    border-radius: 12px;
    padding: 10px 15px;
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.hub-btn:hover {
    transform: translateY(-1px);
}

.hub-btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--hub-primary), var(--hub-primary-strong));
    box-shadow: 0 8px 18px rgba(220, 38, 38, 0.25);
}

.hub-btn-ghost {
    color: #334155;
    border-color: #fecaca;
    background: #fff;
}

.hub-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.hub-item-card {
    border: 1px solid var(--hub-border);
    border-radius: 12px;
    padding: 15px;
    background: linear-gradient(180deg, #ffffff, #fff7f7);
}

.hub-item-card + .hub-item-card {
    margin-top: 0;
}

.hub-empty {
    color: #64748b;
    font-size: 15px;
}

.hub-embed-wrap {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    border-radius: 12px;
    overflow: hidden;
    background: #0f172a;
    margin-bottom: 12px;
}

.hub-embed-wrap iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.hub-mini-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.hub-mini-card {
    border: 1px solid var(--hub-border);
    border-radius: 12px;
    padding: 13px;
    background: #fff;
}

.hub-mini-card h3 {
    margin: 0 0 8px;
    font-size: 15px;
}

.hub-mini-card p {
    margin: 0;
    font-size: 13px;
    line-height: 1.6;
    color: #475569;
}

@media (max-width: 900px) {
    body.hub-page .nav-center {
        display: none;
    }

    body.hub-page .auth-btn {
        padding: 6px 12px;
        font-size: 0.85rem;
    }

    body.hub-page .logo-text {
        display: none;
    }

    body.hub-page .logo {
        gap: 0;
    }

    body.hub-page .beta-badge {
        margin-left: 4px;
        font-size: 0.6rem;
        padding: 1px 4px;
    }

    .hub-grid,
    .hub-mini-grid {
        grid-template-columns: 1fr;
    }

    .hub-title {
        font-size: 28px;
    }
}