:root {
    --rg-bg: #f7f8fb;
    --rg-panel: #ffffff;
    --rg-text: #122033;
    --rg-muted: #5a6472;
    --rg-line: #dde4ee;
    --rg-accent: #0f4c81;
    --rg-accent-2: #9a6a2f;
    --rg-accent-soft: rgba(15, 76, 129, 0.08);
    --rg-shadow: 0 18px 40px rgba(16, 34, 56, 0.08);
    --rg-radius: 18px;
    --rg-radius-sm: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.rg-body, body.rg-admin-body {
    margin: 0;
    background: var(--rg-bg);
    color: var(--rg-text);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--rg-accent); text-decoration: none; }
a:hover { text-decoration: none; }
img { max-width: 100%; display: block; }

.gx-container {
    width: min(1180px, calc(100% - 32px));
    margin-inline: auto;
}
.gx-card {
    background: var(--rg-panel);
    border: 1px solid var(--rg-line);
    border-radius: var(--rg-radius);
    box-shadow: var(--rg-shadow);
}
.gx-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 18px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    transition: all 0.18s ease;
}
.gx-btn:hover { transform: translateY(-1px); }
.gx-btn-primary { background: var(--rg-accent); color: #fff; }
.gx-btn-outline { background: #fff; color: var(--rg-accent); border-color: var(--rg-accent); }
.gx-btn-sm { padding: 9px 14px; font-size: 0.9rem; }

.rg-navbar-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 16px 0;
}
.rg-site-header {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(221,228,238,0.9);
    position: sticky;
    top: 0;
    z-index: 20;
}
.rg-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--rg-text);
}
.rg-brand small { display: block; color: var(--rg-muted); font-size: 0.78rem; }
.rg-brand-logo {
    width: 56px;
    height: 56px;
    object-fit: cover;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 6px 14px rgba(0,0,0,0.08);
}
.rg-nav-links {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}
.rg-nav-links a { color: var(--rg-text); font-weight: 600; }
.rg-nav-active { color: var(--rg-accent) !important; }

.rg-hero, .rg-page-hero {
    background: linear-gradient(135deg, #ebf3fb 0%, #f9fbfe 55%, #f3ecdf 100%);
    padding: 64px 0;
}
.rg-hero-grid, .rg-feature-grid, .rg-two-col, .rg-journal-hero {
    display: grid;
    gap: 28px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
}
.rg-hero-copy h1, .rg-page-hero h1 {
    font-size: clamp(2rem, 4vw, 3.7rem);
    line-height: 1.06;
    margin: 12px 0 18px;
}
.rg-lead, .rg-page-hero p { font-size: 1.08rem; color: var(--rg-muted); max-width: 760px; }
.rg-kicker {
    display: inline-block;
    color: var(--rg-accent);
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.74rem;
}
.rg-hero-actions, .rg-card-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 18px;
}
.rg-hero-visual img, .rg-feature-visual img {
    width: 100%;
    border-radius: 28px;
    border: 1px solid rgba(255,255,255,0.75);
    box-shadow: 0 24px 50px rgba(18, 32, 51, 0.14);
}
.rg-stat-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 28px;
}
.rg-stat-card {
    padding: 16px;
    background: rgba(255,255,255,0.78);
    border: 1px solid rgba(221,228,238,0.95);
    border-radius: var(--rg-radius-sm);
}
.rg-stat-card strong { display: block; margin-bottom: 8px; font-size: 1.3rem; }
.rg-stat-card span { color: var(--rg-muted); font-size: 0.92rem; }

.rg-section { padding: 62px 0; }
.rg-section-alt { background: #eff4f9; }
.rg-section-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 20px;
    margin-bottom: 26px;
}
.rg-section-head h2 { margin: 8px 0 0; font-size: clamp(1.6rem, 2vw, 2.4rem); }
.rg-section-head p { max-width: 700px; color: var(--rg-muted); }

.rg-card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}
.rg-card-grid-journals { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.rg-journal-card { overflow: hidden; }
.rg-journal-card img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; background: #f3f4f6; }
.rg-journal-card-body { padding: 20px; }
.rg-journal-card h3, .rg-conference-card h3, .rg-info-card h3 { margin: 12px 0 10px; font-size: 1.16rem; }
.rg-journal-card p, .rg-conference-card p, .rg-info-card p { color: var(--rg-muted); line-height: 1.65; }

.rg-badge, .rg-chip {
    display: inline-flex;
    align-items: center;
    padding: 7px 10px;
    border-radius: 999px;
    background: var(--rg-accent-soft);
    color: var(--rg-accent);
    font-size: 0.78rem;
    font-weight: 700;
}
.rg-chip-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 14px;
}
.rg-chip { background: rgba(154,106,47,0.10); color: var(--rg-accent-2); }
.rg-meta-pair {
    display: flex;
    gap: 10px 16px;
    flex-wrap: wrap;
    font-size: 0.92rem;
    color: var(--rg-muted);
    margin-top: 12px;
}
.rg-info-card, .rg-feature-card, .rg-feature-visual, .rg-conference-card, .rg-admin-card {
    padding: 24px;
}
.rg-clean-list { margin: 0; padding-left: 18px; color: var(--rg-muted); }
.rg-clean-list li { margin-bottom: 10px; }
.rg-stack-list { display: grid; gap: 14px; }
.rg-cta-band {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 28px;
}
.rg-timeline {
    display: grid;
    gap: 14px;
    margin-top: 14px;
}
.rg-timeline-item {
    border-left: 3px solid var(--rg-accent);
    padding-left: 14px;
}
.rg-timeline-item strong { display: block; margin-bottom: 6px; }
.rg-breadcrumb {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    color: var(--rg-muted);
    font-size: 0.92rem;
    margin-bottom: 14px;
}
.rg-breadcrumb a { color: var(--rg-accent); }
.rg-article-authors { font-weight: 700; margin-top: 18px; }
.rg-article-affiliations { color: var(--rg-muted); }
.rg-muted-note { color: var(--rg-muted); margin-top: 14px; }

.rg-table-card { overflow: hidden; }
.rg-table {
    width: 100%;
    border-collapse: collapse;
}
.rg-table th, .rg-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--rg-line);
    text-align: left;
    vertical-align: top;
}
.rg-table th {
    background: #f4f7fb;
    font-size: 0.9rem;
}
.rg-table tr:last-child td { border-bottom: none; }

.rg-footer {
    padding: 48px 0;
    background: #0f1b2d;
    color: #e4ebf5;
}
.rg-footer a { color: #cfe1f9; }
.rg-footer-grid {
    display: grid;
    gap: 28px;
    grid-template-columns: 1.4fr 1fr 1fr;
}
.rg-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }

.rg-admin-shell {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}
.rg-admin-sidebar {
    padding: 24px;
    background: #10203a;
    color: #eef4ff;
}
.rg-admin-sub { color: rgba(238,244,255,0.75); }
.rg-admin-sidebar nav {
    display: grid;
    gap: 10px;
    margin-top: 20px;
}
.rg-admin-sidebar nav a {
    color: #d5e4ff;
    padding: 10px 12px;
    border-radius: 10px;
}
.rg-admin-sidebar nav a:hover { background: rgba(255,255,255,0.08); }
.rg-admin-main { padding: 26px; }
.rg-admin-header { margin-bottom: 16px; }
.rg-admin-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}
.rg-admin-grid-wide { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 18px; }
.rg-admin-card h3 { margin-top: 0; }
.rg-admin-table-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 20px 20px 0;
}
.rg-admin-content .rg-table-card { margin-top: 0; }

@media (max-width: 992px) {
    .rg-card-grid,
    .rg-card-grid-journals,
    .rg-feature-grid,
    .rg-two-col,
    .rg-hero-grid,
    .rg-journal-hero,
    .rg-footer-grid,
    .rg-stat-row,
    .rg-admin-shell,
    .rg-admin-grid,
    .rg-admin-grid-wide {
        grid-template-columns: 1fr;
    }
    .rg-section-head,
    .rg-cta-band,
    .rg-navbar-wrap {
        align-items: start;
        flex-direction: column;
    }
    .rg-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}


.rg-admin-brand { margin-bottom: 18px; }
.rg-admin-brand small { display: block; color: rgba(238,244,255,0.78); margin-top: 6px; }
.rg-admin-nav { display: grid; gap: 10px; }
.rg-admin-nav a {
    color: #d5e4ff;
    padding: 10px 12px;
    border-radius: 10px;
}
.rg-admin-nav a:hover { background: rgba(255,255,255,0.08); }
.rg-admin-topbar { margin-bottom: 20px; }
.rg-link-button {
    background: none;
    border: none;
    color: var(--rg-accent);
    padding: 0;
    margin-left: 8px;
    cursor: pointer;
    font: inherit;
}
.rg-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}
.rg-form-full { grid-column: 1 / -1; }
.rg-input {
    width: 100%;
    padding: 11px 14px;
    border-radius: 12px;
    border: 1px solid var(--rg-line);
    background: #fff;
    color: var(--rg-text);
    font: inherit;
    margin-top: 6px;
}
.rg-textarea {
    min-height: 160px;
    resize: vertical;
}
.rg-richtext p:first-child { margin-top: 0; }
.rg-richtext p:last-child { margin-bottom: 0; }
.rg-richtext ul { padding-left: 18px; }
.rg-richtext li { margin-bottom: 8px; }