* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f5f5f5;
    color: #333;
}

#app {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    background: #fff;
    padding: 1rem 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    z-index: 20;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

#search-form {
    display: flex;
    gap: 0.5rem;
    flex: 1;
    min-width: 300px;
}

#search-input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

button {
    padding: 0.5rem 1rem;
    background: #0066cc;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    background: #0052a3;
}

#status {
    padding: 0.5rem 2rem;
    font-size: 0.9rem;
    min-height: 2rem;
}

#status.loading { color: #0066cc; }
#status.error { color: #cc0000; }

#help {
    background: #fff;
    padding: 0.75rem 2rem;
    border-bottom: 1px solid #eee;
    font-size: 0.9rem;
    color: #555;
}

#help p {
    margin: 0;
}

#search-results {
    background: #fff;
    padding: 1rem 2rem;
    border-bottom: 1px solid #ddd;
    max-height: 250px;
    overflow-y: auto;
    z-index: 20;
}

#search-results.hidden,
#info-panel.hidden {
    display: none;
}

#search-results h2 {
    margin-top: 0;
    font-size: 1rem;
}

#results-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

#results-list li {
    padding: 0.75rem;
    border-bottom: 1px solid #eee;
    cursor: pointer;
}

#results-list li:hover {
    background: #f0f8ff;
}

#results-list li strong {
    display: block;
    margin-bottom: 0.25rem;
}

#results-list li span {
    font-size: 0.85rem;
    color: #666;
}

main {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: #fff;
}

#graph {
    width: 100%;
    height: 100%;
}

.empty-graph {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: #666;
    padding: 2rem;
}

.empty-graph p {
    margin: 0.5rem 0;
    max-width: 600px;
}

#info-panel {
    position: absolute;
    top: 80px;
    right: 20px;
    width: 320px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    padding: 1rem;
    z-index: 10;
}

#info-panel h2 {
    margin-top: 0;
    font-size: 1.1rem;
}

#info-content h3 {
    margin-top: 0;
    font-size: 1rem;
}

#info-content p {
    margin: 0.5rem 0;
    font-size: 0.9rem;
}