/* ============================================================
   品学优 PinXueYou — 完整样式表 v2.0
   覆盖：变量 重置 布局 侧边栏 登录 按钮 卡片 表单 表格
        模态框 Toast 标签 标签页 工具栏 警告 检查清单
        看板 详情 排课 课程 空状态 骨架 分页 暗色 响应式 打印
   ============================================================ */

/* ===== CSS 变量 ===== */
:root {
  --pri: #6366F1; --pri-dark: #1E1B4B; --pri-light: #818CF8;
  --acc: #F59E0B; --suc: #10B981; --dan: #EF4444; --war: #F59E0B; --inf: #0EA5E9;
  --bg: #F1F5F9; --bg2: #E2E8F0; --card: #FFF; --txt: #1E293B; --txt2: #64748B;
  --bor: #E2E8F0; --hov: #F8FAFC;
  --sw: 220px; --th: 56px;
  --r-sm: 6px; --r: 10px; --r-lg: 14px; --r-xl: 20px;
  --sh-sm: 0 1px 2px rgba(0,0,0,.04);
  --sh: 0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);
  --sh-md: 0 4px 6px rgba(0,0,0,.05),0 2px 4px rgba(0,0,0,.04);
  --sh-lg: 0 10px 25px rgba(0,0,0,.08);
  --sh-xl: 0 20px 50px rgba(0,0,0,.12);
  --tr: 0.2s cubic-bezier(.4,0,.2,1);
}

/* ===== 重置 ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",sans-serif;font-size:14px;color:var(--txt);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--pri);text-decoration:none;transition:var(--tr)}a:hover{color:var(--pri-light)}
ul,ol{list-style:none}img{max-width:100%}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#CBD5E1;border-radius:10px}
::-webkit-scrollbar-thumb:hover{background:#94A3B8}

/* ===== 动画 ===== */
@keyframes pgIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes sUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
@keyframes fIn{from{opacity:0}to{opacity:1}}
@keyframes skPu{0%{background-position:200% 0}100%{background-position:-200% 0}}
@keyframes tIn{from{opacity:0;transform:translateX(60px) scale(.95)}to{opacity:1;transform:translateX(0) scale(1)}}
@keyframes tProg{from{width:100%}to{width:0%}}

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

/* ---- 侧边栏 ---- */
.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sw);background:linear-gradient(180deg,#1E1B4B 0%,#12102A 100%);color:#fff;z-index:200;display:flex;flex-direction:column;transition:transform var(--tr);overflow-y:auto}
.sidebar-brand{padding:20px 20px 18px;font-size:18px;font-weight:700;text-align:center;border-bottom:1px solid rgba(255,255,255,.08);letter-spacing:1px;display:flex;align-items:center;justify-content:center;gap:8px}
.sidebar-brand .dot{width:10px;height:10px;background:var(--acc);border-radius:50%;display:inline-block;box-shadow:0 0 10px var(--acc)}
.sidebar-brand small{font-size:10px;display:block;font-weight:400;opacity:.5;letter-spacing:2px}
.sidebar-user{padding:16px;border-bottom:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:12px}
.sidebar-avatar{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--acc),#D97706);flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:#fff}
.sidebar-user-info{overflow:hidden;flex:1}
.sidebar-user-name{font-weight:600;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-user-role{font-size:11px;opacity:.55}
.sidebar-nav{flex:1;padding:8px;overflow-y:auto}
.sidebar-nav a{display:flex;align-items:center;gap:10px;padding:9px 12px;margin:1px 0;color:rgba(255,255,255,.6);font-size:13px;font-weight:500;transition:all .15s ease;cursor:pointer;text-decoration:none;border-radius:var(--r-sm)}
.sidebar-nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.sidebar-nav a.active{background:rgba(99,102,241,.25);color:#fff;font-weight:600}
.sidebar-nav a .nav-icon{font-size:16px;width:22px;text-align:center;opacity:.8;display:inline-flex;align-items:center;justify-content:center}
.sidebar-nav a.active .nav-icon{opacity:1}
.sidebar-footer{padding:12px 16px;border-top:1px solid rgba(255,255,255,.08)}
.sidebar-footer button{width:100%;padding:8px;background:rgba(255,255,255,.05);color:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.08);border-radius:var(--r-sm);cursor:pointer;font-size:13px;font-family:inherit;transition:var(--tr);display:flex;align-items:center;justify-content:center;gap:6px}
.sidebar-footer button:hover{background:rgba(239,68,68,.2);color:#FCA5A5;border-color:rgba(239,68,68,.3)}

/* ---- 顶栏 ---- */
.topbar{position:fixed;left:var(--sw);right:0;top:0;height:var(--th);background:rgba(255,255,255,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--bor);display:flex;align-items:center;justify-content:space-between;padding:0 24px;z-index:150}
.topbar-left{display:flex;align-items:center;gap:12px;font-size:16px;font-weight:600;color:var(--txt)}
.topbar-right{display:flex;align-items:center;gap:20px;font-size:13px;color:var(--txt2)}
.topbar-right span{white-space:nowrap}
.menu-toggle{display:none;background:none;border:none;font-size:22px;cursor:pointer;color:var(--txt);padding:6px;border-radius:var(--r-sm);line-height:1;transition:var(--tr)}
.menu-toggle:hover{background:var(--bg)}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:99;backdrop-filter:blur(2px)}

/* ---- 主内容 ---- */
.main-content{margin-left:var(--sw);margin-top:var(--th);padding:24px;min-height:calc(100vh - var(--th));width:calc(100% - var(--sw))}
.page{display:none;animation:pgIn .25s ease}
.page.active{display:block}

/* ===== 登录页 ===== */
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#1E1B4B 0%,#3730A3 35%,#6366F1 70%,#818CF8 100%);position:relative;overflow:hidden}
.login-page::before{content:'';position:absolute;width:500px;height:500px;background:radial-gradient(circle,rgba(245,158,11,.2) 0%,transparent 70%);top:-100px;right:-100px;border-radius:50%}
.login-page::after{content:'';position:absolute;width:400px;height:400px;background:radial-gradient(circle,rgba(99,102,241,.3) 0%,transparent 70%);bottom:-80px;left:-80px;border-radius:50%}
.login-card{background:rgba(255,255,255,.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-radius:var(--r-xl);padding:48px 40px;width:420px;max-width:94vw;box-shadow:var(--sh-xl);text-align:center;position:relative;z-index:1;border:1px solid rgba(255,255,255,.3)}
.login-logo{width:72px;height:72px;background:linear-gradient(135deg,var(--pri),var(--pri-dark));border-radius:18px;margin:0 auto 12px;display:flex;align-items:center;justify-content:center;font-size:32px;color:#fff;font-weight:700;box-shadow:0 8px 24px rgba(99,102,241,.3)}
.login-title{font-size:26px;font-weight:700;color:var(--pri-dark);margin-bottom:4px}
.login-sub{font-size:13px;color:var(--txt2);margin-bottom:32px}
.login-err{background:#FEF2F2;color:var(--dan);padding:10px 14px;border-radius:var(--r-sm);font-size:13px;margin-bottom:18px;display:none;border:1px solid #FECACA}
.login-card .form-group{margin-bottom:18px;text-align:left}
.login-card .form-group label{display:block;font-weight:600;margin-bottom:6px;font-size:13px;color:var(--txt)}
.login-card .form-control{width:100%;padding:11px 16px;border:2px solid var(--bor);border-radius:var(--r);font-size:14px;font-family:inherit;transition:var(--tr);background:var(--bg)}
.login-card .form-control:focus{outline:none;border-color:var(--pri);background:#fff;box-shadow:0 0 0 4px rgba(99,102,241,.1)}
.login-card .btn-primary{padding:12px 0;font-size:15px;border-radius:var(--r);font-weight:600}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 18px;border:1px solid transparent;border-radius:var(--r-sm);font-size:14px;font-weight:500;cursor:pointer;transition:var(--tr);white-space:nowrap;user-select:none;font-family:inherit;line-height:1.4}
.btn svg{width:16px;height:16px;flex-shrink:0}
.btn-primary{background:var(--pri);color:#fff;border-color:var(--pri)}.btn-primary:hover{background:#4F46E5;border-color:#4F46E5;box-shadow:0 2px 8px rgba(99,102,241,.35);transform:translateY(-1px)}
.btn-accent{background:var(--acc);color:#fff}.btn-accent:hover{background:#E5900A}
.btn-outline{background:transparent;color:var(--pri);border-color:var(--bor)}.btn-outline:hover{background:var(--pri);color:#fff;border-color:var(--pri)}
.btn-success{background:var(--suc);color:#fff}.btn-success:hover{background:#059669}
.btn-danger{background:var(--dan);color:#fff}.btn-danger:hover{background:#DC2626}
.btn-sm{padding:4px 12px;font-size:12px;border-radius:4px}.btn-sm svg{width:14px;height:14px}
.btn-block{width:100%;padding:12px;font-size:15px}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none!important}
.btn-icon{width:32px;height:32px;padding:0;border-radius:var(--r-sm);background:transparent;color:var(--txt2);border:none;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:var(--tr)}.btn-icon:hover{background:var(--bg);color:var(--txt)}
.btn-icon svg{width:18px;height:18px}

/* ===== 卡片 ===== */
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--sh);padding:20px 24px;margin-bottom:16px;border:1px solid var(--bor)}
.card-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--bor);font-size:15px;font-weight:600}

/* ===== 统计卡片 ===== */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}
.stat-card{background:var(--card);border-radius:var(--r);box-shadow:var(--sh);padding:18px 20px;display:flex;align-items:center;gap:14px;border:1px solid var(--bor);transition:var(--tr);position:relative;overflow:hidden}
.stat-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.stat-card::after{content:'';position:absolute;top:0;right:0;width:80px;height:80px;border-radius:50%;transform:translate(30px,-30px);opacity:.06}
.stat-card.c1::after{background:var(--pri)}.stat-card.c2::after{background:var(--suc)}.stat-card.c3::after{background:var(--acc)}.stat-card.c4::after{background:var(--dan)}
.stat-icon{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.stat-icon svg{width:22px;height:22px}
.stat-icon.i1{background:#EEF2FF;color:var(--pri)}.stat-icon.i2{background:#ECFDF5;color:var(--suc)}
.stat-icon.i3{background:#FFFBEB;color:#D97706}.stat-icon.i4{background:#FEF2F2;color:var(--dan)}
.stat-val{font-size:28px;font-weight:700;color:var(--txt);letter-spacing:-.5px;font-variant-numeric:tabular-nums}
.stat-lbl{font-size:12px;color:var(--txt2);font-weight:500}

/* ===== 警报条 ===== */
.alert-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:20px}
.alert-item{padding:14px 16px;border-radius:var(--r-sm);font-size:13px;display:flex;align-items:center;gap:10px;font-weight:500}
.alert-red{background:#FEF2F2;color:var(--dan);border-left:4px solid var(--dan)}
.alert-yellow{background:#FFFBEB;color:#92400E;border-left:4px solid var(--acc)}
.alert-info{background:#F0F9FF;color:#0369A1;border-left:4px solid var(--inf)}

/* ===== 检查清单 ===== */
.checklist{list-style:none}.checklist li{display:flex;align-items:center;gap:12px;padding:10px 8px;border-bottom:1px solid var(--bor);cursor:pointer;transition:var(--tr);border-radius:var(--r-sm)}.checklist li:last-child{border-bottom:none}.checklist li:hover{background:var(--hov)}
.check-dot{width:24px;height:24px;border-radius:50%;border:2px solid #CBD5E1;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:12px;transition:var(--tr);color:transparent}
.checklist li.done .check-dot{background:var(--suc);border-color:var(--suc);color:#fff;box-shadow:0 2px 6px rgba(16,185,129,.3)}
.checklist li.done .check-text{text-decoration:line-through;color:var(--txt2)}

/* ===== 表单 ===== */
.form-group{margin-bottom:14px}.form-group label{display:block;font-weight:600;margin-bottom:5px;font-size:13px;color:var(--txt)}
.form-control{width:100%;padding:9px 14px;border:1px solid var(--bor);border-radius:var(--r-sm);font-size:14px;font-family:inherit;transition:var(--tr);background:#fff;color:var(--txt)}
.form-control:focus{outline:none;border-color:var(--pri);box-shadow:0 0 0 3px rgba(99,102,241,.1)}
textarea.form-control{resize:vertical;min-height:60px}select.form-control{appearance:auto;cursor:pointer}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}

/* ===== 表格 ===== */
.table-wrap{overflow-x:auto;border-radius:var(--r-sm)}
table{width:100%;border-collapse:collapse;font-size:13px}
thead th{background:linear-gradient(135deg,var(--pri-dark),#312E81);color:#fff;padding:10px 14px;text-align:left;font-weight:500;white-space:nowrap;font-size:12px;letter-spacing:.5px}
thead th:first-child{border-radius:var(--r-sm) 0 0 0}thead th:last-child{border-radius:0 var(--r-sm) 0 0}
tbody td{padding:10px 14px;border-bottom:1px solid var(--bor);white-space:nowrap;transition:background .15s}
tbody tr:nth-child(even){background:var(--hov)}tbody tr:hover{background:#EEF2FF}
tbody tr.row-warn td{color:var(--dan);font-weight:500}

/* ===== 模态框 ===== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fIn .2s ease;backdrop-filter:blur(4px)}
.modal{background:#fff;border-radius:var(--r-lg);width:560px;max-width:95vw;max-height:85vh;overflow-y:auto;box-shadow:var(--sh-xl);animation:sUp .25s ease}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border-bottom:1px solid var(--bor);font-size:16px;font-weight:600;position:sticky;top:0;background:#fff;z-index:1;border-radius:var(--r-lg) var(--r-lg) 0 0}
.modal-close{width:30px;height:30px;border:none;background:var(--bg);border-radius:50%;font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--tr);color:var(--txt2)}.modal-close:hover{background:var(--dan);color:#fff}
.modal-body{padding:24px}.modal-footer{display:flex;justify-content:flex-end;gap:10px;padding:16px 24px;border-top:1px solid var(--bor);position:sticky;bottom:0;background:#fff;border-radius:0 0 var(--r-lg) var(--r-lg)}

/* ===== Toast ===== */
.toast-container{position:fixed;top:24px;right:24px;z-index:2000;display:flex;flex-direction:column;gap:8px}
.toast{padding:12px 20px;border-radius:var(--r);color:#fff;font-size:14px;box-shadow:var(--sh-lg);animation:tIn .35s cubic-bezier(.16,1,.3,1);max-width:420px;font-weight:500;display:flex;align-items:center;gap:8px;position:relative;overflow:hidden}
.toast-success{background:linear-gradient(135deg,#059669,#10B981)}.toast-error{background:linear-gradient(135deg,#DC2626,#EF4444)}.toast-info{background:linear-gradient(135deg,#4F46E5,#6366F1)}.toast-warning{background:linear-gradient(135deg,#D97706,#F59E0B);color:#fff}
.toast-close{margin-left:auto;cursor:pointer;opacity:.7;font-size:18px;line-height:1;background:none;border:none;color:inherit}.toast-close:hover{opacity:1}
.toast-progress{position:absolute;bottom:0;left:0;height:3px;background:rgba(255,255,255,.4);animation:tProg 3s linear forwards}

/* ===== 标签 ===== */
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600;letter-spacing:.3px}
.badge-pri{background:#EEF2FF;color:var(--pri)}.badge-suc{background:#ECFDF5;color:#059669}
.badge-acc{background:#FFFBEB;color:#B45309}.badge-dan{background:#FEF2F2;color:#DC2626}
.badge-pur{background:#FAF5FF;color:#7C3AED}.badge-inf{background:#F0F9FF;color:#0369A1}

/* ===== 标签页 ===== */
.tabs{display:flex;gap:0;margin-bottom:20px;border-bottom:2px solid var(--bor)}
.tab-btn{padding:9px 22px;border:none;background:none;font-size:14px;cursor:pointer;color:var(--txt2);border-bottom:2px solid transparent;margin-bottom:-2px;transition:var(--tr);font-family:inherit;font-weight:500;display:inline-flex;align-items:center;gap:6px}
.tab-btn svg{width:16px;height:16px}.tab-btn.active{color:var(--pri);border-bottom-color:var(--pri);font-weight:600}.tab-panel{display:none}.tab-panel.active{display:block;animation:pgIn .2s ease}

/* ===== 工具栏 ===== */
.toolbar{display:flex;align-items:center;gap:10px;margin-bottom:16px;flex-wrap:wrap}.toolbar .form-control{width:auto;min-width:150px}

/* ===== 看板 ===== */
.board{display:flex;gap:14px;overflow-x:auto;padding-bottom:12px;min-height:400px}
.board-col{flex:1;min-width:230px;background:var(--bg);border-radius:var(--r);padding:14px;border:1px solid var(--bor)}
.board-col-title{padding:8px 14px;font-weight:600;font-size:12px;margin-bottom:12px;border-radius:var(--r-sm);text-align:center;color:#fff;letter-spacing:.5px}
.board-col-cards{display:flex;flex-direction:column;gap:8px;min-height:60px}
.lead-card{background:#fff;border-radius:var(--r-sm);padding:14px;box-shadow:var(--sh-sm);cursor:grab;transition:var(--tr);border-left:3px solid transparent}
.lead-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}.lead-card:active{cursor:grabbing}
.lead-card.st-lead{border-left-color:#64748B}.lead-card.st-contacted{border-left-color:var(--pri)}.lead-card.st-trial{border-left-color:var(--acc)}.lead-card.st-enrolled{border-left-color:var(--suc)}.lead-card.st-lost{border-left-color:var(--dan)}
.lead-card .lc-name{font-weight:600;font-size:14px;margin-bottom:4px}
.lead-card .lc-meta{font-size:12px;color:var(--txt2);line-height:1.5}
.lead-stars{color:var(--acc);font-size:12px}

/* ===== 详情面板 ===== */
.detail-panel{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:24px;margin-top:16px;display:none;animation:sUp .25s ease;border:1px solid var(--bor)}.detail-panel.open{display:block}
.detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.detail-item label{font-size:11px;color:var(--txt2);display:block;margin-bottom:2px}.detail-item span{font-weight:600;font-size:14px}

/* ===== 排课网格 ===== */
.schedule-grid{display:grid;grid-template-columns:80px repeat(7,1fr);gap:2px;overflow-x:auto}
.schedule-cell{padding:10px 8px;border-radius:var(--r-sm);font-size:12px;min-height:50px;background:#fff;border:1px solid var(--bor);cursor:pointer;transition:var(--tr)}.schedule-cell:hover{box-shadow:var(--sh-md);z-index:1;position:relative}
.schedule-cell.tg{background:#EEF2FF;border-left:3px solid var(--pri)}.schedule-cell.xb{background:#ECFDF5;border-left:3px solid var(--suc)}.schedule-cell.ts{background:#FFFBEB;border-left:3px solid var(--acc)}.schedule-cell.conflict{background:#FEF2F2;border:2px solid var(--dan)}
.schedule-hdr{text-align:center;font-weight:600;padding:8px;background:linear-gradient(135deg,var(--pri-dark),#312E81);color:#fff;border-radius:var(--r-sm);font-size:12px}
.schedule-time{display:flex;align-items:center;justify-content:center;font-weight:600;font-size:11px;color:var(--txt2);background:var(--bg);border-radius:var(--r-sm)}

/* ===== 课程卡片网格 ===== */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.course-card{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:20px 22px;cursor:pointer;transition:var(--tr);border-top:4px solid var(--pri);border:1px solid var(--bor);border-top-width:4px}.course-card:hover{box-shadow:var(--sh-lg);transform:translateY(-3px)}
.course-card.tg{border-top-color:var(--pri)}.course-card.ts{border-top-color:var(--acc)}.course-card.xb{border-top-color:var(--suc)}
.course-card .cc-title{font-weight:600;font-size:15px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.course-card .cc-meta{font-size:12px;color:var(--txt2);line-height:1.7}

/* ===== 空状态 ===== */
.empty-state{text-align:center;padding:48px 20px;color:var(--txt2)}
.empty-state svg{width:80px;height:80px;margin:0 auto 14px;display:block;opacity:.25}
.empty-state h3{color:var(--txt);margin-bottom:6px;font-size:16px}.empty-state p{font-size:13px;margin-bottom:16px}

/* ===== 骨架屏 ===== */
.skeleton{background:linear-gradient(90deg,var(--bg2) 25%,var(--bg) 50%,var(--bg2) 75%);background-size:200% 100%;animation:skPu 1.5s ease-in-out infinite;border-radius:var(--r-sm)}
.sk-row{height:40px;margin-bottom:4px;border-radius:4px}.sk-card{height:80px;border-radius:var(--r);margin-bottom:12px}

/* ===== 分页 ===== */
.pagination{display:flex;align-items:center;justify-content:center;gap:4px;margin-top:16px}
.pagination button{padding:6px 12px;border:1px solid var(--bor);background:var(--card);border-radius:var(--r-sm);cursor:pointer;font-size:13px;transition:var(--tr);color:var(--txt)}.pagination button:hover{background:var(--pri);color:#fff;border-color:var(--pri)}.pagination button.active{background:var(--pri);color:#fff;border-color:var(--pri);font-weight:600}.pagination button:disabled{opacity:.4;cursor:not-allowed}

/* ===== 视图切换器 ===== */
.view-switcher{display:flex;gap:0;margin-right:10px;background:var(--bg);border-radius:var(--r-sm);padding:3px;border:1px solid var(--bor)}
.view-switcher button{padding:6px 14px;border:none;background:none;font-size:13px;cursor:pointer;border-radius:4px;color:var(--txt2);transition:var(--tr);font-family:inherit;font-weight:500;display:inline-flex;align-items:center;gap:4px}
.view-switcher button svg{width:14px;height:14px}.view-switcher button.active{background:#fff;color:var(--pri);font-weight:600;box-shadow:var(--sh-sm)}

/* ===== 主题切换 ===== */
.theme-toggle{width:36px;height:36px;border-radius:50%;border:1px solid var(--bor);background:var(--card);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px;transition:var(--tr);color:var(--txt)}.theme-toggle:hover{background:var(--bg)}
.theme-toggle svg{width:18px;height:18px}

/* ===== 图表容器 ===== */
.chart-wrap{position:relative;width:100%;min-height:250px}
.chart-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}

/* ===== 隐藏 ===== */
.hidden{display:none!important}

/* ======== 暗色模式 ======== */
[data-theme="dark"] {
  --bg:#0F172A;--bg2:#1E293B;--card:#1E293B;--txt:#E2E8F0;--txt2:#94A3B8;--bor:#334155;--hov:#1E293B;
  --sh-sm:0 1px 2px rgba(0,0,0,.2);--sh:0 1px 3px rgba(0,0,0,.3);--sh-md:0 4px 6px rgba(0,0,0,.3);--sh-lg:0 10px 25px rgba(0,0,0,.4);--sh-xl:0 20px 50px rgba(0,0,0,.5);
}
[data-theme="dark"] .topbar{background:rgba(15,23,42,.85);box-shadow:0 1px 0 var(--bor)}
[data-theme="dark"] .card,[data-theme="dark"] .detail-panel,[data-theme="dark"] .modal{background:var(--card);border-color:var(--bor)}
[data-theme="dark"] .form-control{background:var(--bg2);color:var(--txt);border-color:var(--bor)}[data-theme="dark"] .form-control:focus{background:var(--bg)}
[data-theme="dark"] tbody tr:nth-child(even){background:rgba(255,255,255,.02)}[data-theme="dark"] tbody tr:hover{background:rgba(99,102,241,.1)}
[data-theme="dark"] .lead-card{background:var(--bg2)}[data-theme="dark"] .board-col{background:var(--bg2)}[data-theme="dark"] .schedule-cell{background:var(--bg2)}
[data-theme="dark"] .btn-outline{color:var(--txt2)}[data-theme="dark"] .btn-outline:hover{background:var(--pri);color:#fff}
[data-theme="dark"] .btn-icon:hover{background:var(--bg2);color:var(--txt)}
[data-theme="dark"] .modal-header,[data-theme="dark"] .modal-footer{background:var(--card)}
[data-theme="dark"] .badge-pri{background:rgba(99,102,241,.15)}[data-theme="dark"] .badge-suc{background:rgba(16,185,129,.15)}[data-theme="dark"] .badge-acc{background:rgba(245,158,11,.15)}[data-theme="dark"] .badge-dan{background:rgba(239,68,68,.15)}
[data-theme="dark"] .login-card{background:rgba(30,41,59,.95);border-color:rgba(255,255,255,.1)}[data-theme="dark"] .login-title{color:#E2E8F0}
[data-theme="dark"] .skeleton{background:linear-gradient(90deg,var(--bg2) 25%,#253349 50%,var(--bg2) 75%);background-size:200% 100%}
[data-theme="dark"] .view-switcher{background:var(--bg2)}[data-theme="dark"] .view-switcher button.active{background:var(--card);color:var(--pri)}

/* ======== 响应式 ======== */
@media(max-width:768px){
  .sidebar{transform:translateX(-100%);box-shadow:4px 0 24px rgba(0,0,0,.3)}.sidebar.open{transform:translateX(0)}
  .topbar{left:0;padding:0 14px}.main-content{margin-left:0;width:100%;padding:14px}
  .menu-toggle{display:inline-flex}.sidebar-overlay.show{display:block}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:10px}.alert-grid{grid-template-columns:1fr}.form-row{grid-template-columns:1fr}
  .board{flex-direction:column}.board-col{min-width:100%}.course-grid{grid-template-columns:1fr}
  .detail-grid{grid-template-columns:1fr}.toolbar{flex-direction:column;align-items:stretch}.toolbar .form-control{width:100%!important}
  .schedule-grid{font-size:10px}.login-card{padding:36px 28px}.chart-row{grid-template-columns:1fr}
}
@media(max-width:480px){
  .stat-grid{grid-template-columns:1fr}.stat-card{padding:14px}.topbar{padding:0 10px}.main-content{padding:10px}
  .card{padding:14px 16px}.modal{border-radius:var(--r) var(--r) 0 0;max-height:95vh}
}

/* ======== 打印 ======== */
@media print{
  .sidebar,.topbar,.btn,.modal-overlay,.toast,.toolbar,.tabs,.menu-toggle{display:none!important}
  .main-content{margin-left:0!important;margin-top:0!important;padding:0!important;width:100%!important}
  .card{box-shadow:none;border:1px solid #ddd;break-inside:avoid}body{background:#fff;font-size:12px}thead th{background:#eee!important;color:#000!important}
}