/* kb-app 管理页 v2 —— 参考 得到大脑(flomo极简输入+AI分析) + Notion(侧边栏+卡片列表)
 * 与课程后台同一套设计 token 体系 */
:root{
  --bg:#f4f6fb; --card:#ffffff; --line:#eceef3; --line-strong:#dfe3ec;
  --ink:#1e2433; --sub:#6b7280; --faint:#9ca3af;
  --accent:#4f46e5; --accent-dark:#4338ca; --accent-soft:rgba(79,70,229,.08); --accent-line:rgba(79,70,229,.18);
  --sidebar-bg:#0f172a; --sidebar-text:#cbd5e1; --sidebar-active:rgba(255,255,255,.08);
  --ok:#16a34a; --warn:#d97706; --danger:#dc2626;
  --radius:12px; --radius-sm:8px;
  --shadow:0 1px 2px rgba(30,36,51,.04), 0 4px 12px rgba(30,36,51,.05);
  --shadow-md:0 1px 3px rgba(30,36,51,.06), 0 10px 30px rgba(30,36,51,.08);
  --shadow-lg:0 4px 6px rgba(30,36,51,.05), 0 20px 50px rgba(30,36,51,.12);
  --input-bg:#fafbfe;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);font-size:14.5px;line-height:1.65;-webkit-font-smoothing:antialiased;min-height:100vh}
button{font:inherit;cursor:pointer;border:none;background:none}
input,textarea,select{font:inherit}
::selection{background:var(--accent-soft)}

/* ===== 通用控件 ===== */
.f-input{width:100%;padding:8px 12px;border:1px solid var(--line-strong);border-radius:10px;background:var(--input-bg);color:var(--ink);outline:none;transition:border .15s,box-shadow .15s}
.f-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
textarea.f-input{resize:vertical;line-height:1.7}
.primary{background:var(--accent);color:#fff;padding:9px 18px;border-radius:10px;font-weight:600;transition:background .15s,transform .1s}
.primary:hover{background:var(--accent-dark)}
.primary:active{transform:scale(.98)}
.ghost{border:1px solid var(--line-strong);color:var(--ink);background:var(--card);padding:8px 14px;border-radius:10px;transition:border .15s,background .15s}
.ghost:hover{border-color:var(--accent);color:var(--accent)}
.danger-ghost{border:1px solid rgba(220,38,38,.3);color:var(--danger);background:var(--card);padding:8px 14px;border-radius:10px}
.danger-ghost:hover{background:rgba(220,38,38,.06)}
.sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn-block{width:100%;margin-top:14px}

/* ===== 登录 ===== */
.login-view{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0f172a 0%,#1e293b 100%)}
.login-card{width:360px;background:var(--card);border-radius:16px;box-shadow:var(--shadow-lg);padding:36px 32px;text-align:center}
.login-logo{width:48px;height:48px;margin:0 auto 14px;border-radius:12px;background:var(--sidebar-bg);color:#fff;font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:center}
.login-card h1{font-size:19px}
.login-sub{font-size:13px;color:var(--sub);margin:6px 0 22px}
.login-card .f-input{text-align:center}
.login-err{color:var(--danger);font-size:13px;min-height:20px;margin-top:10px}

/* ===== 布局 ===== */
.layout{display:flex;min-height:100vh}

/* 侧边栏 */
.sidebar{width:220px;flex:none;background:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto}
.sidebar-brand{padding:18px 20px;display:flex;align-items:center;gap:10px;border-bottom:1px solid rgba(255,255,255,.06)}
.sidebar-brand b{color:#fff;font-size:15px}
.brand-logo{width:28px;height:28px;border-radius:8px;background:rgba(255,255,255,.1);color:#fff;font-weight:700;font-size:11px;display:flex;align-items:center;justify-content:center}
.sidebar-stats{padding:14px 20px 6px}
.stat-block{background:rgba(255,255,255,.04);border-radius:10px;padding:10px 14px;margin-bottom:6px}
.stat-num{font-size:22px;font-weight:700;color:#fff;line-height:1.2}
.stat-label{font-size:11.5px;color:var(--faint)}
.sidebar-nav{flex:1;padding:8px 10px}
.nav-section{font-size:11px;font-weight:600;color:var(--faint);text-transform:uppercase;letter-spacing:.5px;padding:14px 10px 6px}
.nav-item{display:flex;align-items:center;justify-content:space-between;padding:7px 12px;border-radius:8px;cursor:pointer;font-size:13.5px;transition:background .12s}
.nav-item:hover{background:rgba(255,255,255,.05)}
.nav-item.on{background:var(--sidebar-active);color:#fff;font-weight:500}
.nav-item .n{font-size:11px;color:var(--faint);font-variant-numeric:tabular-nums}
.nav-item.on .n{color:var(--sidebar-text)}
.sidebar-foot{padding:12px 16px;border-top:1px solid rgba(255,255,255,.06)}
.sidebar-foot .ghost{background:transparent;border-color:rgba(255,255,255,.12);color:var(--sidebar-text)}
.sidebar-foot .ghost:hover{border-color:rgba(255,255,255,.3);color:#fff}

/* 主内容区 */
.content{flex:1;min-width:0;display:flex;flex-direction:column}

/* 顶栏 */
.topbar{display:flex;align-items:center;gap:12px;padding:14px 24px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.7);backdrop-filter:blur(8px);position:sticky;top:0;z-index:10}
.search-box{flex:1;display:flex;align-items:center;gap:8px;background:var(--input-bg);border:1px solid var(--line-strong);border-radius:10px;padding:0 12px;color:var(--sub);transition:border .15s,box-shadow .15s}
.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.search-box input{flex:1;border:none;background:none;outline:none;padding:8px 0;color:var(--ink)}

/* 智能录入栏 */
.smart-input-area{padding:16px 24px;border-bottom:1px solid var(--line);background:var(--card)}
.smart-tabs{display:flex;gap:4px;margin-bottom:8px}
.smart-tab{padding:4px 14px;border-radius:999px;font-size:12.5px;color:var(--sub);transition:all .12s}
.smart-tab:hover{background:var(--bg);color:var(--ink)}
.smart-tab.on{background:var(--accent-soft);color:var(--accent);font-weight:600}
.smart-input-row{display:flex;gap:10px;align-items:flex-end}
.smart-input{flex:1;border:1px solid var(--line-strong);border-radius:10px;padding:10px 14px;background:var(--input-bg);resize:none;min-height:44px;max-height:200px;transition:border .15s,box-shadow .15s}
.smart-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.smart-actions{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex:none}
.smart-hint{font-size:11.5px;color:var(--faint);max-width:140px;text-align:right}

/* 文档列表 */
.doc-list{flex:1;padding:16px 24px 60px;max-width:900px;margin:0 auto;width:100%}
.doc-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;margin-bottom:10px;cursor:pointer;transition:box-shadow .15s,border .15s,transform .1s}
.doc-card:hover{border-color:var(--accent-line);box-shadow:var(--shadow);transform:translateY(-1px)}
.doc-card-top{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.doc-badge{display:inline-block;padding:1px 9px;border-radius:999px;font-size:11.5px;background:var(--accent-soft);color:var(--accent);border:1px solid var(--accent-line);flex:none}
.doc-badge.type-素材{background:rgba(22,163,74,.08);color:var(--ok);border-color:rgba(22,163,74,.18)}
.doc-badge.type-案例{background:rgba(217,119,5,.08);color:var(--warn);border-color:rgba(217,119,5,.18)}
.doc-badge.type-规范{background:rgba(220,38,38,.08);color:var(--danger);border-color:rgba(220,38,38,.18)}
.doc-title{font-weight:600;font-size:14.5px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.doc-date{font-size:11.5px;color:var(--faint);flex:none}
.doc-summary{font-size:13px;color:var(--sub);margin-bottom:6px;line-height:1.6;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.doc-meta{display:flex;gap:6px;flex-wrap:wrap}
.tagmini{font-size:11.5px;color:var(--sub);background:var(--bg);border:1px solid var(--line);padding:1px 8px;border-radius:999px}
.doc-size{font-size:11.5px;color:var(--faint)}
.empty{text-align:center;color:var(--sub);padding:60px 0;font-size:14px}
.empty-sub{font-size:12.5px;color:var(--faint);margin-top:4px}

/* 搜索结果高亮 */
.result-note{font-size:13px;color:var(--sub);margin-bottom:12px}
.snippet{font-size:13.5px;color:var(--sub);margin-top:6px;line-height:1.75;overflow-wrap:anywhere}
.snippet mark{background:rgba(79,70,229,.14);color:var(--accent-dark);border-radius:3px;padding:0 2px}

/* ===== 弹窗 ===== */
.modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:50;display:none;align-items:flex-start;justify-content:center;padding:6vh 16px}
.modal-mask.show{display:flex}
.modal{background:var(--card);border-radius:16px;box-shadow:var(--shadow-lg);width:520px;max-width:100%;max-height:88vh;display:flex;flex-direction:column;animation:pop .18s ease}
.modal-lg{width:720px}
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:none}}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line);font-size:15px}
.modal-body{padding:18px 20px;overflow:auto}
.modal-foot{display:flex;align-items:center;gap:10px;padding:14px 20px;border-top:1px solid var(--line)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
.form-group{display:flex;flex-direction:column;gap:5px}
.f-label{font-size:12.5px;color:var(--sub);font-weight:600}
.f-content{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.8px}
.doc-err{color:var(--danger);font-size:13px;min-height:18px;margin-top:6px}

/* AI 分析结果卡片 */
.ai-result-section{margin-bottom:16px}
.ai-result-label{font-size:12.5px;color:var(--sub);font-weight:600;margin-bottom:4px}
.ai-result-title{font-size:17px;font-weight:600;margin-bottom:8px}
.ai-result-summary{font-size:14px;line-height:1.8;color:var(--ink);background:var(--input-bg);border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin-bottom:12px}
.ai-tag-suggest{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.ai-tag-chip{padding:3px 10px;border-radius:999px;font-size:12.5px;background:var(--accent-soft);color:var(--accent);border:1px solid var(--accent-line);cursor:pointer;transition:all .12s}
.ai-tag-chip:hover{background:var(--accent);color:#fff}
.ai-key-points{list-style:none;padding:0}
.ai-key-points li{padding:4px 0 4px 20px;position:relative;font-size:13.5px;color:var(--sub)}
.ai-key-points li::before{content:'';position:absolute;left:6px;top:11px;width:5px;height:5px;border-radius:50%;background:var(--accent)}
.ai-loading{text-align:center;padding:30px}
.spinner{width:28px;height:28px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 10px}
@keyframes spin{to{transform:rotate(360deg)}}
.ai-loading p{font-size:13px;color:var(--sub)}

/* toast */
.toast{position:fixed;left:50%;bottom:36px;transform:translateX(-50%) translateY(20px);background:var(--sidebar-bg);color:#fff;font-size:13.5px;padding:10px 20px;border-radius:10px;opacity:0;pointer-events:none;transition:all .25s;z-index:99;box-shadow:var(--shadow-md)}
.toast.show{opacity:1;transform:translateX(-50%)}