* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0f41ae;
    --primary-alt: #1d4ed8;
    --secondary-color: #64748b;
    --background-color: #f8fafc;
    --card-background: #ffffff;
    --text-color: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --transition-speed: 100ms;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    hyphens: auto;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

.header {
    background: var(--text-color);
    color: white;
    padding: 3rem 2rem;
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header .subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    font-weight: 400;
}

.container {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-section {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-top-left-radius: 12px;
    border-bottom-right-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.sidebar-section h2 {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.dates-list {
    list-style: none;
}

.dates-list li {
    display: flex;
    flex-direction: column;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.dates-list li:last-child {
    border-bottom: none;
}

.date-label {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.9rem;
}

.date-value {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 0.85rem;
}

.person-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.person-card {
    flex-basis: calc(50% - .6rem);
    box-sizing: border-box;
    padding: 1rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-top-left-radius: 8px;
    border-bottom-right-radius: 8px;
    transition: transform var(--transition-speed);
}

.person-card:hover {
    transform: translateY(-1px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.person-info {
    flex: 1;
    min-width: 0;
}

.person-info .name {
    font-weight: bold;
    margin-bottom: 0.25rem;
}

.person-info .affiliation {
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.15rem;
}

.person-info .location {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.person-info .email {
    font-size: 0.75rem;
    word-break: break-all;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.navigator {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    background: var(--card-background);
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-top-left-radius: 12px;
    border-bottom-right-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15), -12px 0 0 var(--background-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-btn {
    padding: 0.75rem 1.25rem;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.nav-btn:hover {
    background: var(--primary-color);
    color: white;
}

.nav-btn.active {
    background: var(--text-color);
    color: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.panels-container {
    position: relative;
}

.panel {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-top-left-radius: 12px;
    border-bottom-right-radius: 12px;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
    display: none;
    text-align: justify;
}

.panel.active {
    display: block;
}

@keyframes panel-fade-out {
    from {opacity: 1; transform: translateY(0);}
    to {opacity: 0; transform: translateY(12px) scaleX(.95);}
}
@keyframes panel-fade-in {
    from {opacity: 0; transform: translateY(-4px);}
    to {opacity: 1; transform: translateY(0);}
}

.panel.fade-out {
    display: block;
    animation: var(--transition-speed) ease-in panel-fade-out forwards;
}

.panel.fade-in {
    display: block;
    animation: var(--transition-speed) ease-in panel-fade-in forwards;
}

.panel h2 {
    font-size: 1.75rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--primary-color);
}

.panel h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.panel h3::before {
    content: "§";
    padding-right: .5em;
    font-weight: normal;
    opacity: .5;
}

.panel h4 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

.panel ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.panel li {
    margin-bottom: 0.25rem;
    color: var(--text-color);
}

.panel em {
    opacity: .7;
}

.panel strong {
    color: var(--primary-color);
}

.btn-register {
    text-align: center;
    display: block;
    padding: .75rem 0;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all var(--transition-speed);
}

.btn-register:hover {
    background: var(--primary-alt);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    text-decoration: none;
}

.footer {
    background: var(--text-color);
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
}

.footer p {
    font-size: 0.9rem;
    opacity: 0.9;
}

@media (max-width: 1024px) {
    .container {
        grid-template-columns: 280px 1fr;
        gap: 1rem;
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        order: 2;
    }
    
    .main-content {
        order: 1;
    }
    
    .header {
        padding: 2rem 1rem;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .header .subtitle {
        font-size: 1rem;
    }
    
    .navigator {
        justify-content: center;
    }
    
    .nav-btn {
        padding: 0.5rem 1rem;
    }
    
    .panel {
        padding: 1rem;
    }
    
    .panel h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: .5rem;
    }
    
    .sidebar-section {
        padding: 1rem;
    }
    
    .nav-btn {
        padding: 0.5rem 0.75rem;
    }

    .panel {
        padding: 0.75rem;
    }
}

.llm-table {
    border: 1px solid var(--border-color);
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.llm-table td:first-child {
    font-family: Consolas, monospace;
}

.llm-table td, .llm-table th {
    border-top: 1px solid var(--border-color);
    padding: .35em .5em;
    text-align: left;
}

.llm-table tr:hover {
    background: var(--background-color);
}