/* Mondrian-Inspired Geometric Design */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    line-height: 1.7;
    color: #1a1a1a;
    background-color: #fafafa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

/* Navigation - Clean Geometric Grid */
.navbar {
    background: #ffffff;
    border-bottom: 4px solid #1a5490;
}

.navbar .container {
    display: flex;
    align-items: stretch;
    height: 90px;
}

.logo {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 45px;
    background: #1a5490;
    min-width: 280px;
}

.logo h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.15em;
}

.logo .subtitle {
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 5px;
    letter-spacing: 0.03em;
}

.nav-links {
    display: flex;
    list-style: none;
    flex: 1;
    margin: 0;
}

.nav-links li {
    flex: 1;
    display: flex;
    border-left: 2px solid #d4d4d4;
}

.nav-links li:first-child {
    border-left: none;
}

.nav-links a {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2a2a2a;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.88rem;
    transition: background 0.3s, color 0.3s;
    padding: 0 12px;
    text-align: center;
}

.nav-links a:hover {
    background: #e8f1f8;
    color: #1a5490;
}

.nav-links a.active {
    background: #1a5490;
    color: #ffffff;
}

.support-btn {
    background: #ffffff !important;
    color: #1a5490 !important;
    font-weight: 700 !important;
    border-left: 3px solid #1a5490 !important;
}

.support-btn:hover {
    background: #1a5490 !important;
    color: #ffffff !important;
}

.lang-switch {
    font-weight: 600 !important;
}

/* Main Content */
main {
    padding: 50px 20px;
}

.hero {
    background: #ffffff;
    margin: 0 auto 35px;
    max-width: 1200px;
    border: 3px solid #000000;
}

.hero h2 {
    background: #1a5490;
    color: #ffffff;
    padding: 32px 45px;
    font-size: 2.1rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    margin: 0;
    border-bottom: 3px solid #000000;
}

.content {
    padding: 45px;
    background: #ffffff;
}

.content p {
    margin-bottom: 1.4rem;
    font-size: 1.05rem;
    line-height: 1.75;
    color: #2a2a2a;
}

.content p:last-child {
    margin-bottom: 0;
}

/* Research Sections */
.construction-notice {
    background: #2563eb;
    color: #ffffff;
    padding: 18px 28px;
    margin-bottom: 35px;
    font-weight: 500;
    border-left: 5px solid #000000;
}

.research-section {
    margin-top: 40px;
    background: #fafafa;
    padding: 35px;
    border: 2px solid #d4d4d4;
}

.research-section:first-of-type {
    margin-top: 0;
}

.research-section h3 {
    font-size: 1.6rem;
    color: #1a5490;
    margin-bottom: 12px;
    font-weight: 700;
    padding-bottom: 8px;
    border-bottom: 3px solid #1a5490;
    display: inline-block;
}

.section-description {
    color: #666;
    margin-bottom: 22px;
    font-size: 0.95rem;
}

.publications-list {
    min-height: 90px;
    padding: 28px;
    background: #ffffff;
    border: 2px solid #d4d4d4;
}

/* Contact */
.contact-content {
    max-width: 100%;
}

.contact-info {
    margin-top: 28px;
    padding: 32px;
    background: #fafafa;
    border: 2px solid #d4d4d4;
    border-left: 5px solid #1a5490;
}

.contact-info h3 {
    color: #1a5490;
    margin-bottom: 12px;
    font-size: 1.35rem;
    font-weight: 700;
    padding-bottom: 8px;
    border-bottom: 3px solid #1a5490;
    display: inline-block;
}

.contact-info a {
    color: #1a5490;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.08rem;
}

.contact-info a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background: #000000;
    margin-top: 70px;
    border-top: 4px solid #1a5490;
}

footer .container {
    padding: 28px 45px;
    max-width: 1200px;
}

footer p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 968px) {
    .navbar .container {
        flex-direction: column;
        height: auto;
    }

    .logo {
        min-width: auto;
        padding: 22px;
        text-align: center;
    }

    .nav-links {
        flex-wrap: wrap;
    }

    .nav-links li {
        flex: 0 0 33.333%;
        border-left: none;
        border-top: 2px solid #d4d4d4;
    }

    .nav-links a {
        padding: 16px 10px;
    }

    .hero h2 {
        padding: 26px 32px;
        font-size: 1.7rem;
    }

    .content {
        padding: 32px;
    }
}

@media (max-width: 600px) {
    .nav-links li {
        flex: 0 0 50%;
    }

    .hero h2 {
        padding: 22px 26px;
        font-size: 1.45rem;
    }

    .content {
        padding: 26px;
    }

    .logo h1 {
        font-size: 1.7rem;
    }
}