:root {
    --primary: #4f6ef7;
    --primary-dark: #3c58d8;
    --bg: #f4f6fb;
    --card-bg: #ffffff;
    --text: #24292f;
    --text-muted: #6b7280;
    --border: #e3e7f0;
    --green: #22a06b;
    --red: #dc2626;
    --amber: #b45309;
    --radius: 10px;
}

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.hidden { display: none !important; }

/* ── 头部 ───────────────────────────────────────────── */
.app-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-header h1 { font-size: 18px; font-weight: 600; }
.subtitle { font-size: 13px; color: var(--text-muted); font-weight: 400; margin-left: 6px; }

.header-right { display: flex; align-items: center; gap: 14px; }

.health { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-muted); }
.dot { width: 9px; height: 9px; border-radius: 50%; background: #9ca3af; display: inline-block; }
.dot.ok { background: var(--green); box-shadow: 0 0 0 3px rgba(34, 160, 107, .15); }
.dot.bad { background: var(--red); box-shadow: 0 0 0 3px rgba(220, 38, 38, .12); }

.settings-panel {
    max-width: 960px;
    margin: 0 auto;
    padding: 12px 20px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    font-size: 13px;
}
.settings-panel label { color: var(--text-muted); }
.settings-panel input {
    flex: 1;
    min-width: 260px;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    font-family: Consolas, monospace;
}
.settings-tip { color: var(--text-muted); width: 100%; }

/* ── 主体 ───────────────────────────────────────────── */
.app-main {
    max-width: 960px;
    width: 100%;
    margin: 24px auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    flex: 1;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 24px;
}

.card h2 { font-size: 15px; margin-bottom: 14px; }

/* ── 搜索输入区 ─────────────────────────────────────── */
.field-label { font-size: 13px; color: var(--text-muted); display: block; margin-bottom: 6px; }

.query-input {
    width: 100%;
    min-height: 76px;
    resize: vertical;
    padding: 11px 13px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.6;
    font-family: inherit;
    color: var(--text);
}
.query-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 110, 247, .12); }

.examples { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.example-chip {
    font-size: 12px;
    color: #43537a;
    background: #f0f3fc;
    border: 1px solid #e0e6f7;
    border-radius: 999px;
    padding: 4px 12px;
    cursor: pointer;
    transition: background .15s, border-color .15s;
}
.example-chip:hover { background: #e5ebfd; border-color: var(--primary); }

.action-row {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px;
    margin-top: 16px;
    flex-wrap: wrap;
}
.inline-fields { display: flex; gap: 16px; flex-wrap: wrap; }
.inline-field { display: flex; flex-direction: column; gap: 6px; }
.inline-field input {
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    font-family: Consolas, monospace;
    background: #fff;
    color: var(--text);
}
.inline-field input[type="number"] { width: 92px; }
.inline-field input#traceIdInput { width: 210px; }

.status-bar { margin-top: 14px; font-size: 13px; padding: 9px 12px; border-radius: 6px; }
.status-bar.info { background: #eef2ff; color: #3730a3; }
.status-bar.success { background: #ecfdf5; color: var(--green); }
.status-bar.error { background: #fef2f2; color: var(--red); }

/* ── 按钮 ───────────────────────────────────────────── */
.btn {
    border: none;
    border-radius: 6px;
    padding: 8px 16px;
    font-size: 13px;
    cursor: pointer;
    transition: background .15s;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-ghost { background: transparent; color: var(--primary); border: 1px solid var(--border); }
.btn-ghost:hover { background: #f6f8ff; }
.btn-lg { padding: 10px 28px; font-size: 14px; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* ── 结果区 ─────────────────────────────────────────── */
.result-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
.result-header h2 { margin-bottom: 0; }
.summary { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
    font-size: 12px;
    background: #f0f3fc;
    color: #43537a;
    border-radius: 999px;
    padding: 3px 10px;
}
.chip strong { font-weight: 600; }

.qtype-badge {
    font-size: 12px;
    border-radius: 999px;
    padding: 3px 10px;
    font-weight: 600;
}
.qtype-badge.simple { background: #ecfdf5; color: var(--green); }
.qtype-badge.complex { background: #fff7ed; color: var(--amber); }

.search-query-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 12px; font-size: 13px; }
.search-query-row .label { color: var(--text-muted); }
.kw-chip {
    font-size: 12px;
    background: #eef1fe;
    color: var(--primary);
    border-radius: 6px;
    padding: 3px 10px;
    font-family: Consolas, monospace;
}

.tabs {
    display: flex;
    align-items: center;
    gap: 6px;
    border-bottom: 1px solid var(--border);
    margin: 16px 0 14px;
    flex-wrap: wrap;
}
.tab {
    border: none;
    background: transparent;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.spacer { flex: 1; }
.tab-tools { display: flex; gap: 6px; }

.list-panel { max-height: 620px; overflow: auto; display: flex; flex-direction: column; gap: 12px; }

/* ── 单条搜索结果 ───────────────────────────────────── */
.result-item {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 16px;
    transition: border-color .15s, box-shadow .15s;
}
.result-item:hover { border-color: #cdd7f2; box-shadow: 0 2px 10px rgba(40, 60, 120, .06); }

.result-title-row { display: flex; align-items: flex-start; gap: 10px; }
.rank-badge {
    flex: none;
    width: 24px;
    height: 24px;
    border-radius: 6px;
    background: #eef1fe;
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.result-title {
    font-size: 15px;
    font-weight: 600;
    color: #1a38b0;
    text-decoration: none;
    line-height: 1.45;
    word-break: break-word;
}
.result-title:hover { text-decoration: underline; }

.result-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin: 6px 0 8px 34px;
    font-size: 12px;
    color: var(--text-muted);
}
.result-meta .domain { color: var(--green); }
.result-meta .dot-sep { color: #cbd2e2; }

.result-summary {
    margin-left: 34px;
    font-size: 13px;
    line-height: 1.7;
    color: #374151;
    word-break: break-word;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.result-summary.expanded { -webkit-line-clamp: unset; display: block; }
.expand-toggle {
    margin: 6px 0 0 34px;
    font-size: 12px;
    color: var(--primary);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}
.expand-toggle:hover { text-decoration: underline; }

.empty-tip { text-align: center; color: var(--text-muted); font-size: 14px; padding: 32px 0; }

/* ── JSON 视图 ──────────────────────────────────────── */
#jsonView {
    background: #1e2430;
    color: #d7e0f0;
    border-radius: 8px;
    padding: 16px;
    font-size: 12px;
    line-height: 1.6;
    max-height: 620px;
    overflow: auto;
    white-space: pre;
}

/* ── 页脚 ───────────────────────────────────────────── */
.app-footer {
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    padding: 18px 0 26px;
}

@media (max-width: 640px) {
    .card { padding: 16px; }
    .action-row { flex-direction: column; align-items: stretch; }
    .btn-lg { width: 100%; }
    .result-summary, .result-meta, .expand-toggle { margin-left: 0; }
}