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

:root {
    --pri: #2563eb;
    --pri-h: #1d4ed8;
    --bg: #f1f5f9;
    --card: #ffffff;
    --text: #1e293b;
    --mut: #64748b;
    --bor: #e2e8f0;
    --red: #ef4444;
    --amber: #f59e0b;
    --green: #10b981;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
}

/* ── 登录 ── */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-card {
    background: var(--card);
    border-radius: 14px;
    padding: 40px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 8px 30px rgba(0,0,0,.06);
}
.logo {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
}
.tagline {
    color: var(--mut);
    font-size: 13px;
    margin-bottom: 24px;
}
.tabs {
    display: flex;
    border-bottom: 2px solid var(--bor);
    margin-bottom: 20px;
}
.tab {
    padding: 8px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--mut);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}
.tab.active { color: var(--pri); border-bottom-color: var(--pri); }

input, textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--bor);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    margin-bottom: 12px;
    outline: none;
    transition: border .15s;
}
input:focus, textarea:focus { border-color: var(--pri); }
textarea { resize: vertical; min-height: 180px; line-height: 1.6; }

.btn {
    padding: 11px 20px;
    background: var(--pri);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: background .15s;
}
.btn:hover { background: var(--pri-h); }
.btn:disabled { background: var(--mut); cursor: not-allowed; }
.btn-link {
    background: none;
    border: none;
    color: var(--mut);
    cursor: pointer;
    font-size: 13px;
}
.btn-link:hover { color: var(--pri); }

.msg { color: var(--red); font-size: 13px; margin-top: 8px; min-height: 18px; }
.muted { color: var(--mut); font-size: 13px; }
.empty { color: var(--mut); font-size: 13px; text-align: center; padding: 20px 0; }

/* ── 主界面 ── */
.main { height: 100vh; display: flex; flex-direction: column; }
.topbar {
    background: var(--card);
    padding: 10px 24px;
    border-bottom: 1px solid var(--bor);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.topbar .title { font-weight: 600; font-size: 16px; }
.topbar .right { display: flex; align-items: center; gap: 12px; }
.topbar .user { color: var(--mut); font-size: 13px; }

.body { flex: 1; display: flex; overflow: hidden; }

/* 左栏 */
.sidebar {
    width: 400px;
    background: var(--card);
    border-right: 1px solid var(--bor);
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.panel { display: flex; flex-direction: column; }
.panel label { font-weight: 600; font-size: 13px; margin-bottom: 8px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.panel-head h3 { font-size:14px; }
.row { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; }

/* 模式切换 Tabs */
.mode-tabs { display: flex; gap: 6px; margin-bottom: 10px; }
.mode-tab {
    padding: 6px 14px;
    border: 1px solid var(--bor);
    background: #fff;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all .15s;
}
.mode-tab.active { background: var(--pri); color: #fff; border-color: var(--pri); }
.mode-tab:hover:not(.active) { border-color: var(--pri); color: var(--pri); }

.history { display: flex; flex-direction: column; gap: 6px; }
.h-item {
    padding: 10px 12px;
    border: 1px solid var(--bor);
    border-radius: 8px;
    cursor: pointer;
    transition: border .15s;
}
.h-item:hover { border-color: var(--pri); }
.h-item .date { font-size: 12px; color: var(--mut); }
.h-item .prev { font-size: 13px; margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.h-item .tags { margin-top: 4px; display: flex; gap: 4px; flex-wrap: wrap; }
.tag {
    font-size: 11px;
    padding: 1px 6px;
    background: #fef3c7;
    color: #92400e;
    border-radius: 4px;
}

/* 右栏 */
.content { flex: 1; overflow-y: auto; padding: 24px 32px; }
.result { max-width: 760px; margin: 0 auto; }
.empty-big { text-align: center; padding: 80px 20px; color: var(--mut); }
.empty-big .muted { margin-top: 6px; }

/* Markdown 渲染 */
.result h1 { font-size: 20px; margin: 24px 0 12px; }
.result h2 { font-size: 17px; margin: 20px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--bor); }
.result h2:first-child { margin-top: 0; }
.result h3 { font-size: 15px; margin: 16px 0 8px; }
.result p { margin-bottom: 10px; }
.result ul, .result ol { margin-bottom: 10px; padding-left: 22px; }
.result li { margin-bottom: 4px; }
.result strong { color: var(--pri); }
.result code { background: #f1f5f9; padding: 2px 5px; border-radius: 4px; font-size: 13px; }
.result blockquote { border-left: 3px solid var(--pri); padding-left: 14px; margin: 10px 0; color: var(--mut); }
.result table { width: 100%; border-collapse: collapse; margin: 10px 0; }
.result th, .result td { border: 1px solid var(--bor); padding: 8px 12px; text-align: left; font-size: 13px; }
.result th { background: #f8fafc; font-weight: 600; }

/* 加载动画 */
.loading { display: flex; align-items: center; gap: 10px; color: var(--pri); }
.loading::before {
    content: "";
    width: 16px; height: 16px;
    border: 2px solid var(--bor);
    border-top-color: var(--pri);
    border-radius: 50%;
    animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 响应式 */
@media (max-width: 900px) {
    .body { flex-direction: column; }
    .sidebar { width: 100%; max-height: 45vh; border-right: none; border-bottom: 1px solid var(--bor); }
}

/* 分析元信息横幅 */
.meta-banner {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 8px;
    padding: 10px 16px;
    margin-bottom: 18px;
    font-size: 13px;
    color: #166534;
}
.meta-banner .meta-total {
    color: #6b7280;
    font-size: 12px;
}
.meta-banner .meta-rules {
    background: #fef3c7;
    border: 1px solid #fde68a;
    border-radius: 6px;
    padding: 4px 10px;
    color: #92400e;
}
.meta-banner .meta-rules b { color: var(--red); }

/* 流式输出时光标闪烁 */
.stream-cursor {
    display: inline-block;
    animation: blink 1s steps(2) infinite;
    color: var(--primary, #2563eb);
    font-weight: bold;
    margin-left: 2px;
}
@keyframes blink {
    0%, 50% { opacity: 1; }
    50.01%, 100% { opacity: 0; }
}