/* Modern Professional Design */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a5490;
    --secondary-color: #2c7bd4;
    --accent-color: #f39c12;
    --text-dark: #2c3e50;
    --text-light: #5a6c7d;
    --bg-light: #f8f9fc;
    --bg-white: #ffffff;
    --border-color: #e1e8ed;
    --success-color: #27ae60;
    --hover-color: #0d3a6b;
}

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Header Styles */
header {
    background-color: var(--bg-white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    border-bottom: 1px solid var(--border-color);
    padding: 25px 0;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
}

.journal-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.journal-link {
    text-decoration: none;
    display: block;
}

.journal-link:hover {
    text-decoration: none;
}

.journal-title {
    font-size: 1.4em;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.3px;
    line-height: 1.2;
    transition: color 0.2s;
}

.journal-link:hover .journal-title {
    color: var(--secondary-color);
}

.journal-short {
    font-size: 0.95em;
    color: var(--text-dark);
    font-weight: 600;
    margin-top: 2px;
}

.journal-issn {
    font-size: 0.85em;
    color: var(--text-light);
    font-weight: 500;
}

/* Navigation */
.main-nav {
    background-color: var(--primary-color);
    position: relative;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: white;
    transition: all 0.3s;
    border-radius: 3px;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 0;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    flex: 1;
}

.nav-menu a {
    display: block;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 16px 20px;
    font-weight: 500;
    font-size: 0.95em;
    text-align: center;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.nav-menu a:hover,
.nav-menu a.active {
    background-color: var(--hover-color);
    border-bottom-color: var(--accent-color);
    color: white;
}

/* Page Hero */
.page-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 25px 0;
    text-align: center;
}

.page-hero h2 {
    font-size: 1.8em;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.page-hero p {
    font-size: 1em;
    opacity: 0.95;
    font-weight: 400;
}

/* Content Section */
.content-section {
    padding: 60px 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 40px;
}

/* Contact Box */
.contact-box {
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    margin-bottom: 30px;
}

.contact-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 20px 25px;
}

.contact-header h3 {
    font-size: 1.3em;
    font-weight: 600;
    margin: 0;
}

.contact-details {
    padding: 25px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-label {
    font-size: 0.85em;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-value {
    font-size: 1.1em;
    color: var(--text-dark);
    font-weight: 500;
}

.detail-value a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.2s;
}

.detail-value a:hover {
    color: var(--primary-color);
}

/* FAQ Section */
.faq-section {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.faq-section > h3 {
    font-size: 1.5em;
    color: var(--primary-color);
    margin-bottom: 25px;
    font-weight: 700;
}

.faq-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.faq-item:first-of-type {
    padding-top: 0;
}

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

.faq-item h4 {
    font-size: 1.05em;
    color: var(--text-dark);
    margin-bottom: 10px;
    font-weight: 600;
    line-height: 1.4;
}

.faq-item p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 0.96em;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.sidebar-widget {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.sidebar-widget h4 {
    font-size: 1.1em;
    color: var(--primary-color);
    margin-bottom: 18px;
    font-weight: 700;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background-color: var(--bg-light);
    border-radius: 6px;
}

.info-item span {
    color: var(--text-light);
    font-size: 0.9em;
    font-weight: 500;
}

.info-item strong {
    color: var(--text-dark);
    font-weight: 600;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 50px 0 0;
    margin-top: 80px;
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-logo img {
    height: 60px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-content {
    display: block;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h4 {
    color: white;
    font-size: 1.1em;
    margin-bottom: 18px;
    font-weight: 600;
}

.footer-section p {
    line-height: 1.7;
    font-size: 0.95em;
}

.footer-issn {
    color: var(--accent-color);
    font-weight: 600;
    margin-top: 10px;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.95em;
}

.footer-section ul a:hover {
    color: white;
    text-decoration: none;
}

.footer-bottom {
    text-align: center;
    padding: 25px 0;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }

    .content-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .sidebar {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .header-top {
        padding: 20px 0;
    }

    .header-top .container {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }

    .logo-section {
        align-items: flex-start;
    }

    .journal-title {
        font-size: 1.2em;
    }

    /* Mobile Menu */
    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        flex-direction: column;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-in-out;
    }

    .nav-menu.active {
        max-height: 500px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }

    .nav-menu li {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-menu a {
        text-align: left;
        padding: 14px 20px;
        border-bottom: none !important;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
        background-color: var(--hover-color);
        border-left: 3px solid var(--accent-color);
    }

    .page-hero {
        padding: 20px 0;
    }

    .page-hero h2 {
        font-size: 1.5em;
    }

    .content-section {
        padding: 40px 0;
    }

    .sidebar {
        grid-template-columns: 1fr;
    }

    .footer-content {
        display: block;
    }
}