:root {
    --bg: #0d1117;
    --surface: #161b22;
    --border: #30363d;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --accent: #f7931a;
    --accent-hover: #e8850f;
    --green: #3fb950;
    --red: #f85149;
    --blue: #58a6ff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, monospace;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1100px;
    margin: 0 auto;
}

h1 {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

h1 span {
    color: var(--text);
    font-weight: 300;
}

#searchForm {
    display: flex;
    gap: 0.5rem;
}

#searchInput {
    flex: 1;
    padding: 0.6rem 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.95rem;
    font-family: monospace;
}

#searchInput:focus {
    outline: none;
    border-color: var(--accent);
}

#searchForm button {
    padding: 0.6rem 1.5rem;
    background: var(--accent);
    color: #000;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}

#searchForm button:hover {
    background: var(--accent-hover);
}

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
}

h2 {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.stat-value {
    font-size: 1.2rem;
    font-weight: 600;
    font-family: monospace;
    color: var(--accent);
}

.blocks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.block-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    cursor: pointer;
    transition: border-color 0.15s;
}

.block-card:hover {
    border-color: var(--accent);
}

.block-height {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.4rem;
}

.block-info {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: monospace;
}

.block-info span {
    display: block;
}

.hidden {
    display: none;
}

#resultsContent {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    font-family: monospace;
    font-size: 0.85rem;
}

.result-row {
    display: flex;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
}

.result-row:last-child {
    border-bottom: none;
}

.result-label {
    min-width: 160px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.result-value {
    word-break: break-all;
    color: var(--text);
}

.result-value a {
    color: var(--blue);
    text-decoration: none;
}

.result-value a:hover {
    text-decoration: underline;
}

.result-section {
    margin-top: 1.5rem;
}

.result-section-title {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.tx-item {
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border);
}

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

.tx-hash {
    color: var(--blue);
    cursor: pointer;
}

.tx-hash:hover {
    text-decoration: underline;
}

.tx-amount {
    float: right;
}

.tx-positive {
    color: var(--green);
}

.tx-negative {
    color: var(--red);
}

.back-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: border-color 0.15s;
}

.back-btn:hover {
    border-color: var(--accent);
}

.loading {
    color: var(--text-muted);
    text-align: center;
    padding: 2rem;
}

.error-msg {
    color: var(--red);
    text-align: center;
    padding: 2rem;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

@media (max-width: 600px) {
    header {
        padding: 1rem;
    }

    main {
        padding: 1rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .result-row {
        flex-direction: column;
        gap: 0.2rem;
    }

    .result-label {
        min-width: unset;
    }
}