:root {
    --bg-color: #060913;
    --glass-bg: rgba(16, 21, 41, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --primary-color: #00f0ff;
    --secondary-color: #7000ff;
    --text-primary: #ffffff;
    --text-secondary: #a0a5b8;
    --accent-glow: rgba(0, 240, 255, 0.15);
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background-color: var(--bg-color); color: var(--text-primary); font-family: var(--font-body); line-height: 1.6; overflow-x: hidden; }
.futuristic-bg { position: fixed; inset: 0; z-index: -1; background: radial-gradient(circle at 15% 50%, rgba(112,0,255,0.1) 0%, transparent 50%), radial-gradient(circle at 85% 30%, rgba(0,240,255,0.1) 0%, transparent 50%); }
.futuristic-bg::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px); background-size: 50px 50px; opacity: 0.3; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 2rem; }
.glass-panel { background: var(--glass-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: 16px; box-shadow: 0 8px 32px rgba(0,0,0,0.3); }

/* ── HEADER ── */
.glass-header { background: rgba(6,9,19,0.85); backdrop-filter: blur(16px); border-bottom: 1px solid var(--glass-border); position: fixed; width: 100%; top: 0; z-index: 100; transition: background 0.3s, box-shadow 0.3s; }
.header-container { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.logo a { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.logo img { height: 38px; width: auto; border-radius: 6px; }
.logo-text { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: #fff; }
.dot { color: var(--primary-color); }
.main-nav ul { display: flex; gap: 1.5rem; list-style: none; }
.main-nav a { color: var(--text-secondary); text-decoration: none; font-weight: 500; transition: color 0.3s; font-size: 0.92rem; padding: 0.5rem 0; }
.main-nav a:hover, .main-nav a.active { color: var(--primary-color); }
.has-dropdown { position: relative; }
.has-dropdown > a i { font-size: 0.65rem; margin-left: 0.3rem; transition: transform 0.3s; }
.dropdown-menu { display: none; position: absolute; top: calc(100% + 8px); left: 50%; transform: translateX(-50%); min-width: 220px; background: rgba(10,15,33,0.97); border: 1px solid rgba(0,240,255,0.15); border-radius: 12px; backdrop-filter: blur(16px); padding: 0.5rem 0; box-shadow: 0 10px 30px rgba(0,0,0,0.5); list-style: none; z-index: 200; }
.has-dropdown:hover > .dropdown-menu { display: block; animation: fadeIn 0.25s ease; }
.dropdown-menu li a { display: block; padding: 0.6rem 1.2rem; color: var(--text-secondary); font-size: 0.88rem; transition: all 0.2s; white-space: nowrap; }
.dropdown-menu li a:hover { background: rgba(0,240,255,0.08); color: var(--primary-color); }
.header-actions { display: flex; align-items: center; gap: 1rem; }
.search-btn { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--primary-color); background: rgba(0,240,255,0.05); border: 1px solid rgba(0,240,255,0.2); border-radius: 30px; padding: 0.45rem 1rem; font-size: 0.85rem; text-decoration: none; font-family: var(--font-body); transition: all 0.3s; }
.search-btn:hover { background: rgba(0,240,255,0.15); border-color: var(--primary-color); box-shadow: 0 0 15px rgba(0,240,255,0.3); }
.auth-buttons { display: flex; gap: 0.7rem; }

/* ── BUTTONS ── */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.55rem 1.2rem; border-radius: 8px; font-family: var(--font-body); font-weight: 600; text-decoration: none; transition: all 0.3s; cursor: pointer; font-size: 0.88rem; border: none; }
.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.82rem; }
.btn-lg { padding: 0.75rem 1.6rem; font-size: 1rem; }
.btn-primary { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); color: #fff; box-shadow: 0 4px 15px var(--accent-glow); }
.btn-primary:hover { box-shadow: 0 6px 20px rgba(0,240,255,0.3); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary-color); border: 1px solid var(--primary-color); }
.btn-outline:hover { background: rgba(0,240,255,0.1); transform: translateY(-2px); }
.btn-pdf { background: rgba(0,240,255,0.08); color: var(--primary-color); border: 1px solid rgba(0,240,255,0.3); padding: 0.4rem 1rem; font-size: 0.82rem; border-radius: 8px; text-decoration: none; display: inline-flex; align-items: center; gap: 0.4rem; transition: all 0.3s; font-weight: 600; }
.btn-pdf:hover { background: rgba(0,240,255,0.18); box-shadow: 0 0 15px rgba(0,240,255,0.2); }

/* ── MAIN ── */
.main-content { margin-top: 100px; margin-bottom: 60px; }

/* ── HERO ── */
.hero { padding: 3rem 3.5rem; margin-bottom: 2rem; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -50%; right: -30%; width: 60%; height: 200%; background: radial-gradient(circle, rgba(112,0,255,0.15) 0%, transparent 60%); z-index: 0; pointer-events: none; }
.hero-badge-row { display: flex; gap: 0.8rem; margin-bottom: 1.5rem; position: relative; z-index: 1; flex-wrap: wrap; }
.badge { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.3rem 1rem; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 20px; font-size: 0.82rem; color: var(--primary-color); letter-spacing: 0.5px; font-weight: 500; }
.badge-accent { background: rgba(0,240,255,0.08); border-color: rgba(0,240,255,0.25); }
.hero-content { position: relative; z-index: 1; max-width: 800px; margin-bottom: 2.5rem; }
.hero h1 { font-family: var(--font-heading); font-size: 2.8rem; line-height: 1.15; margin-bottom: 1.2rem; }
.gradient-text { background: linear-gradient(135deg, #00f0ff, #7000ff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { color: var(--text-secondary); font-size: 1.05rem; margin-bottom: 2rem; max-width: 700px; line-height: 1.7; }
.hero-actions { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; position: relative; z-index: 1; }
.stat-card { padding: 1.3rem; text-align: center; background: rgba(16,21,41,0.4); border-top: 2px solid rgba(0,240,255,0.15); transition: all 0.3s; }
.stat-card:hover { transform: translateY(-4px); border-top-color: var(--primary-color); box-shadow: 0 8px 25px rgba(0,240,255,0.1); }
.stat-icon { font-size: 1.3rem; color: var(--primary-color); margin-bottom: 0.5rem; }
.stat-card h3 { font-family: var(--font-heading); color: #fff; font-size: 1.05rem; margin-bottom: 0.2rem; }
.stat-card p { color: var(--text-secondary); font-size: 0.8rem; margin: 0; }

/* ── ANNOUNCEMENT STRIP ── */
.announcement-strip { display: flex; align-items: center; gap: 1.5rem; padding: 1.2rem 2rem; margin-bottom: 2rem; border-left: 3px solid var(--primary-color); animation: glowPulse 3s infinite alternate; }
.announce-icon { font-size: 1.3rem; color: var(--primary-color); flex-shrink: 0; }
.announce-body { flex: 1; }
.announce-body h4 { font-family: var(--font-heading); font-size: 1rem; margin-bottom: 0.3rem; }
.announce-body p { color: var(--text-secondary); font-size: 0.88rem; margin: 0; }
@keyframes glowPulse { from { box-shadow: 0 0 10px rgba(0,240,255,0.05); } to { box-shadow: 0 0 20px rgba(0,240,255,0.12); } }

/* ── CONTENT GRID ── */
.content-grid { display: grid; grid-template-columns: 280px 1fr; gap: 2rem; }

/* ── SIDEBAR ── */
.sidebar-widget { padding: 1.3rem; margin-bottom: 1.5rem; }
.sidebar-widget h3 { font-family: var(--font-heading); font-size: 1.05rem; color: #fff; border-bottom: 1px solid var(--glass-border); padding-bottom: 0.7rem; margin-bottom: 1rem; display: flex; align-items: center; gap: 0.6rem; }
.sidebar-widget h3 i { color: var(--primary-color); font-size: 0.9rem; }
.template-download-btn { display: flex; align-items: center; gap: 0.8rem; padding: 0.8rem; background: rgba(0,240,255,0.06); border: 1px solid rgba(0,240,255,0.2); border-radius: 10px; color: var(--primary-color); text-decoration: none; font-weight: 600; font-size: 0.85rem; transition: all 0.3s; }
.template-download-btn:hover { background: rgba(0,240,255,0.15); border-color: var(--primary-color); transform: translateY(-2px); box-shadow: 0 4px 15px rgba(0,240,255,0.15); }
.template-download-btn i { font-size: 1.2rem; }
.widget-list { list-style: none; }
.widget-list li { margin-bottom: 0.3rem; }
.widget-list a { color: var(--text-secondary); text-decoration: none; display: flex; align-items: center; gap: 0.7rem; padding: 0.45rem 0.6rem; border-radius: 8px; transition: all 0.3s; font-size: 0.88rem; }
.widget-list a:hover { color: #fff; background: rgba(255,255,255,0.05); padding-left: 1rem; }
.widget-list a i { width: 16px; text-align: center; color: var(--primary-color); font-size: 0.8rem; }
.indexing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.6rem; }
.indexing-badge { display: flex; flex-direction: column; align-items: center; gap: 0.4rem; padding: 0.8rem 0.5rem; background: rgba(255,255,255,0.03); border: 1px solid var(--glass-border); border-radius: 10px; text-decoration: none; transition: all 0.3s; }
.indexing-badge i { font-size: 1.2rem; color: var(--primary-color); }
.indexing-badge span { font-size: 0.72rem; color: var(--text-secondary); font-weight: 500; text-align: center; }
.indexing-badge:hover { border-color: rgba(0,240,255,0.3); background: rgba(0,240,255,0.06); transform: translateY(-2px); }
.journal-info-list { display: flex; flex-direction: column; gap: 0.7rem; }
.info-item { display: flex; justify-content: space-between; align-items: center; padding: 0.5rem 0; border-bottom: 1px solid rgba(255,255,255,0.04); }
.info-item:last-child { border-bottom: none; }
.info-label { color: var(--text-secondary); font-size: 0.82rem; }
.info-value { color: #fff; font-size: 0.85rem; font-weight: 600; }

/* ── ARTICLES SECTION ── */
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.section-title { display: flex; align-items: center; gap: 0.7rem; }
.section-title i { color: var(--primary-color); font-size: 1.1rem; }
.section-title h2 { font-family: var(--font-heading); font-size: 1.6rem; }
.view-all { color: var(--primary-color); text-decoration: none; display: flex; align-items: center; gap: 0.5rem; font-weight: 500; font-size: 0.9rem; transition: all 0.3s; }
.view-all:hover { color: #fff; gap: 0.8rem; }
.issue-info { display: flex; align-items: center; gap: 1.5rem; padding: 1.3rem 1.5rem; margin-bottom: 1.5rem; }
.issue-cover-placeholder { width: 60px; height: 70px; background: linear-gradient(135deg, rgba(0,240,255,0.1), rgba(112,0,255,0.1)); border: 1px solid rgba(0,240,255,0.2); border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.issue-cover-placeholder i { font-size: 1.5rem; color: var(--primary-color); }
.issue-details h3 { font-family: var(--font-heading); font-size: 1.1rem; margin-bottom: 0.5rem; }
.issue-meta-tags { display: flex; gap: 1rem; flex-wrap: wrap; }
.meta-tag { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--text-secondary); font-size: 0.82rem; background: rgba(255,255,255,0.04); padding: 0.25rem 0.7rem; border-radius: 6px; }
.meta-tag i { color: var(--primary-color); font-size: 0.75rem; }
.article-card { padding: 1.8rem; margin-bottom: 1.2rem; transition: all 0.3s; border-left: 3px solid transparent; }
.article-card:hover { transform: translateX(4px); border-left-color: var(--primary-color); box-shadow: 0 10px 40px rgba(0,0,0,0.4); }
.article-meta { display: flex; align-items: center; gap: 1rem; margin-bottom: 0.8rem; font-size: 0.82rem; flex-wrap: wrap; }
.tag { background: rgba(0,240,255,0.08); color: var(--primary-color); padding: 0.2rem 0.7rem; border-radius: 12px; font-weight: 600; display: inline-flex; align-items: center; gap: 0.3rem; font-size: 0.78rem; }
.tag i { font-size: 0.65rem; }
.article-type { color: var(--text-secondary); font-style: italic; }
.pages { color: var(--text-secondary); margin-left: auto; }
.article-title { font-family: var(--font-heading); font-size: 1.15rem; line-height: 1.4; margin-bottom: 0.7rem; }
.article-title a { color: #fff; text-decoration: none; transition: color 0.3s; }
.article-title a:hover { color: var(--primary-color); }
.article-authors { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1.2rem; display: flex; align-items: flex-start; gap: 0.5rem; }
.article-authors i { color: var(--primary-color); font-size: 0.8rem; margin-top: 0.2rem; flex-shrink: 0; }
.article-footer { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--glass-border); padding-top: 1rem; flex-wrap: wrap; gap: 0.8rem; }
.article-doi { display: flex; align-items: center; gap: 0.5rem; font-size: 0.82rem; }
.article-doi i { color: var(--primary-color); font-size: 0.75rem; }
.article-doi a { color: var(--text-secondary); text-decoration: none; transition: color 0.3s; word-break: break-all; }
.article-doi a:hover { color: var(--primary-color); }
.article-actions { display: flex; align-items: center; gap: 1rem; }
.article-stats { display: flex; gap: 0.8rem; color: var(--text-secondary); font-size: 0.82rem; }
.article-stats span { display: flex; align-items: center; gap: 0.3rem; }
.article-stats i { font-size: 0.75rem; }
.articles-footer { text-align: center; margin-top: 2rem; }

/* ── FOOTER ── */
.glass-footer { background: rgba(6,9,19,0.95); border-top: 1px solid var(--glass-border); padding: 3rem 0 0; margin-top: 4rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 2.5rem; padding-bottom: 2.5rem; border-bottom: 1px solid var(--glass-border); }
.footer-brand h3 { font-family: var(--font-heading); font-size: 1.5rem; margin-bottom: 0.8rem; }
.footer-desc { color: var(--text-secondary); font-size: 0.88rem; margin-bottom: 0.5rem; }
.footer-issn { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 0.5rem; }
.footer-brand a { color: var(--primary-color); text-decoration: none; font-size: 0.88rem; transition: color 0.3s; }
.footer-brand a:hover { color: #fff; }
.footer-brand a i { margin-right: 0.3rem; }
.footer-links h4, .footer-license-col h4 { font-family: var(--font-heading); font-size: 1rem; margin-bottom: 1rem; color: #fff; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { color: var(--text-secondary); text-decoration: none; font-size: 0.85rem; transition: color 0.3s; }
.footer-links a:hover { color: var(--primary-color); }
.footer-license-col p { color: var(--text-secondary); font-size: 0.82rem; line-height: 1.6; }
.footer-license-col a { color: var(--primary-color); text-decoration: none; }
.cc-badges { display: flex; gap: 0.5rem; margin-top: 0.8rem; font-size: 1.3rem; color: var(--text-secondary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 1.2rem 0; }
.footer-bottom p { color: var(--text-secondary); font-size: 0.82rem; }
.footer-bottom a { color: var(--primary-color); text-decoration: none; }

/* ── HAMBURGER ── */
.hamburger { display: none; flex-direction: column; justify-content: center; align-items: center; gap: 5px; background: transparent; border: 1px solid var(--glass-border); border-radius: 8px; cursor: pointer; padding: 0.6rem; width: 42px; height: 42px; transition: border-color 0.3s; }
.hamburger:hover { border-color: var(--primary-color); background: rgba(0,240,255,0.05); }
.hamburger span { display: block; width: 20px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all 0.3s; }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── ANIMATIONS ── */
@keyframes fadeIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

/* ── RESPONSIVE: TABLET ── */
@media (max-width: 1024px) {
    .content-grid { grid-template-columns: 240px 1fr; }
    .hero h1 { font-size: 2.2rem; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 768px) {
    .header-container { flex-wrap: wrap; height: auto; min-height: 60px; padding: 0.8rem 1rem; }
    .logo { order: 1; flex: 1; }
    .hamburger { display: flex; order: 2; }
    .main-nav { display: none; width: 100%; order: 3; border-top: 1px solid var(--glass-border); margin-top: 0.5rem; padding-top: 0.5rem; }
    .main-nav.nav-open { display: block; animation: fadeIn 0.25s ease; }
    .main-nav ul { flex-direction: column; gap: 0; }
    .main-nav a { display: block; padding: 0.75rem 0.5rem; border-bottom: 1px solid rgba(255,255,255,0.05); font-size: 0.95rem; }
    .main-nav li:last-child a { border-bottom: none; }
    .dropdown-menu { position: static; border: none; box-shadow: none; padding-left: 1rem; background: rgba(10,15,33,0.5); }
    .has-dropdown:hover .dropdown-menu { animation: none; }
    .header-actions { display: none; width: 100%; order: 4; justify-content: center; padding: 0.8rem 0; border-top: 1px solid var(--glass-border); }
    .header-actions.nav-open { display: flex; flex-wrap: wrap; gap: 0.8rem; }
    .content-grid { grid-template-columns: 1fr; }
    .sidebar { order: 2; }
    .articles-section { order: 1; }
    .main-content { margin-top: 80px; }
    .hero { padding: 2rem 1.5rem; }
    .hero h1 { font-size: 1.8rem; }
    .hero p { font-size: 0.95rem; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .announcement-strip { flex-direction: column; text-align: center; padding: 1.2rem; }
    .article-card { padding: 1.3rem; }
    .article-footer { flex-direction: column; align-items: flex-start; }
    .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .footer-bottom { flex-direction: column; text-align: center; gap: 0.3rem; }
    .issue-info { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
    .container { padding: 0 1rem; }
    .hero { padding: 1.5rem 1rem; }
    .hero h1 { font-size: 1.5rem; }
    .hero-stats { grid-template-columns: 1fr 1fr; gap: 0.6rem; }
    .stat-card { padding: 1rem; }
    .section-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .article-title { font-size: 1rem; }
    .article-meta { gap: 0.5rem; }
}