:root {
    --bg: #f0f0f0;
    --surface: #ffffff;
    --surface-hover: #f5f5f5;
    --border: #ddd;
    --text: #1a1a1a;
    --text-secondary: #666;
    --accent: #2563eb;
    --accent-light: #dbeafe;
    --mark-bg: #fef08a;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, monospace;
    --radius: 6px;
    --sidebar-w: 200px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111;
        --surface: #1a1a1a;
        --surface-hover: #252525;
        --border: #333;
        --text: #e5e5e5;
        --text-secondary: #999;
        --accent: #3b82f6;
        --accent-light: #1e3a5f;
        --mark-bg: #854d0e;
    }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* ---- Search bar ---- */
#search-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 12px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

#search-bar h1 {
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    color: var(--accent);
}

#search-wrap {
    display: flex;
    flex: 1;
    max-width: 600px;
    gap: 6px;
    position: relative;
}

#search-history {
    position: absolute;
    top: 100%;
    left: 0;
    right: 50px;
    max-height: 300px;
    overflow-y: auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    z-index: 50;
    margin-top: 2px;
}
.history-item {
    padding: 6px 10px;
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.history-item:hover, .history-item.history-active { background: var(--accent-light); }

#search-input {
    flex: 1;
    padding: 5px 10px;
    font-size: 13px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    outline: none;
}
#search-input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-light); }

#search-btn, #mode-toggle button {
    padding: 5px 12px;
    font-size: 13px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
}
#search-btn { background: var(--accent); color: #fff; border-color: var(--accent); }
#search-btn:disabled { opacity: 0.5; cursor: not-allowed; }

#mode-toggle { display: flex; gap: 2px; }
#mode-toggle button.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.nav-btn {
    padding: 4px 10px;
    font-size: 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: transparent;
    color: var(--text);
    text-decoration: none;
    cursor: pointer;
}
.nav-btn:hover { background: var(--surface-hover); }

#export-db-btn {
    margin-left: auto;
    padding: 4px 10px;
    font-size: 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-secondary);
    cursor: pointer;
}
#export-db-btn:hover { background: var(--surface-hover); }

/* ---- Main layout: three-column ---- */
#app {
    display: grid;
    grid-template-columns: var(--sidebar-w) 350px 1fr;
    flex: 1;
    overflow: hidden;
}

/* ---- Filters sidebar ---- */
#filters {
    padding: 10px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 12px;
}

#filters h2 {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

#filters label { font-size: 11px; font-weight: 500; color: var(--text-secondary); }

#filters input[type="text"],
#filters select {
    width: 100%;
    padding: 4px 6px;
    font-size: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
}
/* ---- Month/Year picker ---- */
.mp-wrap { position: relative; width: 100%; display: flex; gap: 2px; }
.mp-wrap input { flex: 1; min-width: 0; }
.mp-toggle {
    padding: 2px 5px;
    font-size: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-secondary);
    cursor: pointer;
    flex-shrink: 0;
}
.mp-toggle:hover { background: var(--surface-hover); }
.mp-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 50;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    padding: 8px;
    margin-top: 2px;
}
.mp-year-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}
.mp-year-row button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--text);
    padding: 2px 8px;
    border-radius: 3px;
}
.mp-year-row button:hover { background: var(--surface-hover); }
.mp-year-label { font-size: 13px; font-weight: 600; }
.mp-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2px;
}
.mp-grid button {
    padding: 5px 2px;
    font-size: 11px;
    border: 1px solid transparent;
    border-radius: 3px;
    background: none;
    cursor: pointer;
    color: var(--text);
}
.mp-grid button:hover { background: var(--surface-hover); }
.mp-grid button.selected { background: var(--accent); color: #fff; }
.mp-footer {
    display: flex;
    justify-content: flex-end;
    gap: 6px;
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--border);
}
.mp-footer button {
    padding: 3px 10px;
    font-size: 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
}
.mp-footer button:hover { opacity: 0.85; }
.mp-done { background: var(--accent); color: #fff; border-color: var(--accent); }
.mp-clear { background: var(--surface); color: var(--text-secondary); }

#doc-types {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 6px;
}
#doc-types legend { font-size: 11px; font-weight: 500; color: var(--text-secondary); padding: 0 3px; }
#doc-types label { display: flex; align-items: center; gap: 4px; font-size: 12px; cursor: pointer; }

#filters > button {
    padding: 4px 8px;
    font-size: 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-secondary);
    cursor: pointer;
}
#filters > button:hover { background: var(--surface-hover); }

/* ---- Results list (center column) ---- */
#results {
    border-right: 1px solid var(--border);
    overflow-y: auto;
    background: var(--bg);
    display: flex;
    flex-direction: column;
}

#results-header {
    position: sticky;
    top: 0;
    z-index: 10;
    padding: 6px 12px;
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    flex-shrink: 0;
}

#results-list { flex: 1; }

.result-item {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.1s;
}
.result-item:hover { background: var(--surface-hover); }
.result-item.selected { background: var(--accent-light); }

.result-from {
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-subject {
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text);
}

.result-meta {
    display: flex;
    justify-content: space-between;
    margin-top: 2px;
}

.result-date {
    font-size: 11px;
    color: var(--text-secondary);
}

.result-type {
    font-size: 10px;
    color: var(--text-secondary);
}

.result-snippet {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.result-snippet mark { background: var(--mark-bg); color: inherit; padding: 0 1px; border-radius: 2px; }

/* ---- Detail pane (right column) ---- */
#detail-pane {
    overflow-y: auto;
    background: var(--surface);
}

#detail-placeholder {
    padding: 40px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

#detail-content {
    padding: 16px;
}

.detail-headers {
    display: grid;
    grid-template-columns: 50px 1fr;
    gap: 2px 8px;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.detail-label {
    font-weight: 600;
    color: var(--text-secondary);
    text-align: right;
    font-size: 12px;
}

.detail-value { font-size: 12px; word-break: break-word; }

.detail-body {
    white-space: pre-wrap;
    word-break: break-word;
    line-height: 1.5;
    font-size: 13px;
    margin-bottom: 10px;
}

#detail-content details {
    margin-top: 6px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 12px;
}
#detail-content summary {
    padding: 4px 8px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 11px;
}
#detail-content pre {
    padding: 8px;
    font-family: var(--mono);
    font-size: 11px;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 300px;
    overflow-y: auto;
    color: var(--text-secondary);
}
.detail-meta-line {
    padding: 4px 8px;
    font-size: 11px;
}

/* ---- Pagination ---- */
#pagination {
    position: sticky;
    bottom: 0;
    padding: 6px 12px;
    display: flex;
    justify-content: center;
    gap: 3px;
    border-top: 1px solid var(--border);
    background: var(--surface);
    flex-wrap: wrap;
    flex-shrink: 0;
}
#pagination button {
    min-width: 28px;
    padding: 3px 6px;
    font-size: 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
}
#pagination button:hover { background: var(--surface-hover); }
#pagination button.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---- SQL Panel (spans columns 2+3) ---- */
#sql-panel {
    grid-column: 2 / 4;
    grid-row: 1;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}

#sql-schema {
    padding: 20px 30px;
    font-size: 11px;
}
#sql-schema h3 {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin: 14px 0 6px;
}
#sql-schema h3:first-child { margin-top: 0; }
.schema-tables { display: flex; gap: 16px; flex-wrap: wrap; }
.schema-table { flex: 1; min-width: 200px; }
.schema-name {
    font-weight: 600;
    font-size: 12px;
    color: var(--accent);
    margin-bottom: 2px;
}
#sql-schema pre {
    font-family: var(--mono);
    font-size: 10px;
    line-height: 1.5;
    color: var(--text-secondary);
    white-space: pre;
    margin: 0;
    padding: 6px 8px;
    background: var(--bg);
    border-radius: var(--radius);
    overflow-x: auto;
}
.schema-examples { display: flex; gap: 10px; flex-wrap: wrap; }
.schema-example {
    flex: 1;
    min-width: 200px;
    cursor: pointer;
    transition: border-color 0.15s;
    border: 1px solid transparent;
}
.schema-example:hover { border-color: var(--accent); }
#sql-schema ul {
    list-style: none;
    padding: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}
#sql-schema code {
    font-family: var(--mono);
    font-size: 10px;
    background: var(--bg);
    padding: 1px 3px;
    border-radius: 2px;
}

#sql-input-wrap {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    flex-shrink: 0;
}

#sql-input {
    width: 100%;
    min-height: 80px;
    max-height: 200px;
    padding: 8px;
    font-family: var(--mono);
    font-size: 13px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    resize: vertical;
    outline: none;
}
#sql-input:focus { border-color: var(--accent); }

#sql-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 6px;
}

#sql-run {
    padding: 5px 14px;
    font-size: 13px;
    border: none;
    border-radius: var(--radius);
    background: var(--accent);
    color: #fff;
    cursor: pointer;
}
#sql-run:disabled { opacity: 0.5; }

#sql-status { font-size: 12px; color: var(--text-secondary); flex: 1; }
#sql-help {
    margin-left: auto;
    padding: 4px 10px;
    font-size: 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-secondary);
    cursor: pointer;
}
#sql-help:hover { background: var(--surface-hover); }

#sql-results-wrap {
    flex: 1;
    overflow: auto;
    padding: 0;
}

#sql-results {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}
#sql-results th {
    position: sticky;
    top: 0;
    background: var(--surface);
    padding: 6px 10px;
    text-align: left;
    font-weight: 600;
    font-size: 11px;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}
#sql-results td {
    padding: 4px 10px;
    border-bottom: 1px solid var(--border);
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: top;
}
#sql-results tr:hover td { background: var(--surface-hover); }
#sql-results td.cell-wrap {
    white-space: pre-wrap;
    max-width: none;
}

/* ---- Status bar ---- */
#status-bar {
    padding: 3px 12px;
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--surface);
    border-top: 1px solid var(--border);
    display: flex;
    gap: 24px;
    flex-shrink: 0;
}

/* ---- Download overlay ---- */
#download-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}
#download-box {
    background: var(--surface);
    border-radius: 12px;
    padding: 32px;
    max-width: 480px;
    width: 90%;
    text-align: center;
}
#download-box h2 { font-size: 20px; margin-bottom: 12px; }
#download-box p { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; line-height: 1.5; }
#download-box code { font-family: var(--mono); background: var(--bg); padding: 2px 6px; border-radius: 3px; font-size: 13px; }
#download-btn {
    padding: 10px 24px;
    font-size: 15px;
    border: none;
    border-radius: var(--radius);
    background: var(--accent);
    color: #fff;
    cursor: pointer;
    margin-top: 8px;
}
#download-btn:disabled { opacity: 0.5; cursor: not-allowed; }
#progress-wrap { margin-top: 16px; }
#progress-bar { height: 8px; background: var(--bg); border-radius: 4px; overflow: hidden; }
#progress-fill { height: 100%; background: var(--accent); width: 0%; transition: width 0.2s; }
#progress-text { font-size: 12px; color: var(--text-secondary); margin-top: 6px; display: block; }
#torrent-stats {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 6px;
    font-size: 11px;
    color: var(--text-secondary);
}
#http-fallback-btn {
    margin-top: 12px;
    padding: 6px 16px;
    font-size: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-secondary);
    cursor: pointer;
}
#http-fallback-btn:hover { background: var(--surface-hover); }
#load-file-btn {
    display: inline-block;
    margin-top: 10px;
    padding: 6px 14px;
    font-size: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    cursor: pointer;
}
#load-file-btn:hover { background: var(--surface-hover); }

#save-local-btn {
    display: block;
    margin-top: 12px;
    font-size: 11px;
    color: var(--text-secondary);
    text-decoration: underline;
    cursor: pointer;
}

/* ---- Mobile ---- */
@media (max-width: 900px) {
    #app { grid-template-columns: 1fr; }
    #filters { display: none; }
    #detail-pane { display: none; }
    #sql-panel { grid-column: 1; }
}