/* ============================================================
   后台 / 家长端 / 老师端 通用后台样式（清爽浅色）
   ============================================================ */
:root{
  --g:#2bbf9b; --g-deep:#1f9e81; --o:#ff8a5b; --ink:#2f3a36;
  --muted:#8a9792; --line:#ebede9; --bg:#f5f7f5; --card:#fff;
  --side:#1f2d28; --side-2:#273a33;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);
  color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
.wrap{width:min(1180px,94vw);margin:0 auto}
.btn{display:inline-block;padding:9px 18px;border-radius:10px;border:none;cursor:pointer;
  font-size:14px;font-weight:600;transition:.15s}
.btn:hover{opacity:.9}
.btn-g{background:var(--g);color:#fff}
.btn-o{background:var(--o);color:#fff}
.btn-line{background:#fff;color:var(--g-deep);border:1.5px solid var(--g)}
.btn-sm{padding:6px 12px;font-size:13px}
.btn-block{display:block;width:100%;text-align:center}

/* 后台布局 */
.app{display:flex;min-height:100vh}
.side{width:230px;background:var(--side);color:#cdd6d2;flex-shrink:0;display:flex;flex-direction:column}
.side .brand{display:flex;align-items:center;gap:10px;padding:20px 22px;color:#fff;font-weight:800;font-size:18px;
  border-bottom:1px solid var(--side-2)}
.side .brand .dot{width:30px;height:30px;border-radius:9px;background:var(--g);display:grid;place-items:center;color:#fff}
.side nav{flex:1;padding:14px 12px}
.side nav a{display:flex;align-items:center;gap:10px;padding:11px 14px;border-radius:10px;color:#cdd6d2;font-size:14px;margin-bottom:4px}
.side nav a:hover{background:var(--side-2);color:#fff}
.side nav a.active{background:var(--g);color:#fff}
.side .foot{padding:16px 22px;border-top:1px solid var(--side-2);font-size:12px;color:#7e8c86}
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{height:60px;background:#fff;border-bottom:1px solid var(--line);display:flex;
  align-items:center;justify-content:space-between;padding:0 24px}
.topbar .title{font-weight:700;font-size:16px}
.topbar .user{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--muted)}
.topbar .user .av{width:34px;height:34px;border-radius:50%;background:var(--g);color:#fff;display:grid;place-items:center;font-weight:700}
.content{padding:24px;flex:1}

/* 页面头 */
.page-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;flex-wrap:wrap;gap:10px}
.page-head h1{font-size:20px}
.page-head .sub{color:var(--muted);font-size:13px}

/* 卡片 / 统计 */
.grid{display:grid;gap:16px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px}
.stat .lbl{color:var(--muted);font-size:13px}
.stat .num{font-size:28px;font-weight:800;margin-top:6px;color:var(--g-deep)}
.stat .num.o{color:var(--o)}
.stat .ico{float:right;font-size:26px;opacity:.5}

/* 表格 */
.table{width:100%;border-collapse:collapse;background:var(--card);border-radius:14px;overflow:hidden;
  border:1px solid var(--line);font-size:14px}
.table th,.table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
.table th{background:#fafbfa;color:var(--muted);font-weight:600;font-size:13px}
.table tr:last-child td{border-bottom:none}
.table tbody tr:hover{background:#fafdfb}
.table .empty{text-align:center;color:var(--muted);padding:30px}

/* 徽标 */
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}
.badge-pending{background:#fff3e6;color:#d9760a}
.badge-confirmed{background:#e6f6f0;color:var(--g-deep)}
.badge-done{background:#e8eefc;color:#3a6ad9}
.badge-cancel{background:#f1f1f1;color:#888}
.badge-off{background:#fdeaea;color:#d9534f}
.badge-wait{background:#fff3e6;color:#d9760a}

/* 表单 */
.form{max-width:560px}
.form .row{margin-bottom:16px}
.form label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.form input,.form select,.form textarea{width:100%;padding:10px 12px;border:1.5px solid var(--line);
  border-radius:10px;font-size:14px;font-family:inherit;background:#fff;color:var(--ink)}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--g)}
.form .hint{font-size:12px;color:var(--muted);margin-top:5px}

/* 约课日期选择器（自动置灰老师休息日） */
.dp-wrap{position:relative}
.dp-display{width:100%;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;
  font-size:14px;font-family:inherit;background:#fff;color:var(--ink);cursor:pointer}
.dp-display:focus{outline:none;border-color:var(--g)}
.dp-display:disabled{background:#f5f5f5;color:#aab5b1;cursor:not-allowed}
.dp-panel{position:absolute;top:calc(100% + 6px);left:0;z-index:60;width:302px;background:#fff;
  border:1px solid var(--line);border-radius:14px;box-shadow:0 14px 34px rgba(19,32,25,.16);padding:14px}
.dp-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.dp-nav{width:28px;height:28px;border:1px solid var(--line);background:#fff;border-radius:8px;
  cursor:pointer;color:var(--muted);font-size:15px;line-height:1}
.dp-nav:hover:not(:disabled){border-color:var(--g);color:var(--g-deep)}
.dp-nav:disabled{opacity:.35;cursor:not-allowed}
.dp-title{font-weight:700;font-size:14px}
.dp-dows{display:grid;grid-template-columns:repeat(7,1fr);text-align:center;
  font-size:12px;color:var(--muted);margin-bottom:6px}
.dp-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}
.dp-blank{height:34px}
.dp-day{position:relative;height:34px;border:none;border-radius:8px;font-size:13px;font-family:inherit;
  background:#e9f6f1;color:var(--ink);cursor:pointer;display:grid;place-items:center;padding:0}
.dp-day:hover:not(:disabled){background:var(--g);color:#fff}
.dp-day:disabled{cursor:not-allowed}
.dp-day.past{background:#f4f5f4;color:#c3c9c6}
.dp-day.off{background:#fdeaea;color:#d9534f}
.dp-day.today{box-shadow:inset 0 0 0 1.5px var(--g)}
.dp-day.sel{background:var(--g);color:#fff;font-weight:700}
.dp-tag{position:absolute;bottom:1px;left:0;right:0;font-size:9px;font-style:normal;
  text-align:center;line-height:1;transform:scale(.9)}
.dp-legend{display:flex;align-items:center;gap:6px;margin-top:10px;font-size:12px;color:var(--muted)}
.dp-legend .lg{width:12px;height:12px;border-radius:3px;display:inline-block}
.dp-legend .lg-off{background:#fdeaea}
.dp-legend .lg-ok{background:#e9f6f1}

/* 登录页 */
.login-wrap{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#eafaf4,#fef6f0)}
.login{background:#fff;border-radius:22px;box-shadow:0 16px 40px rgba(43,191,155,.14);
  padding:36px 34px;width:380px}
.login h2{font-size:22px;text-align:center;margin-bottom:6px}
.login .desc{text-align:center;color:var(--muted);font-size:13px;margin-bottom:22px}
.login .btn{margin-top:10px}
/* 注册页（宽卡片） */
.login.wide{width:560px}
.login.wide .grid-2{gap:0 14px}
.reg-tip{background:#e6f6f0;color:var(--g-deep);border-radius:10px;padding:10px 14px;
  font-size:13px;margin-bottom:16px;line-height:1.7}
.reg-tip.warn{background:#fff3e6;color:#d9760a}
.login .alt{text-align:center;font-size:13px;color:var(--muted);margin-top:14px}
.login .alt a{color:var(--g-deep);font-weight:600}
.login .back{display:block;text-align:center;font-size:12.5px;color:var(--muted);margin-top:10px}
.login .back:hover{color:var(--g-deep)}

/* 课情小卡 */
.panel-title{font-size:15px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.hours-big{font-size:40px;font-weight:800;color:var(--g-deep)}
.progress{height:10px;background:#eef2ef;border-radius:999px;overflow:hidden;margin-top:10px}
.progress > i{display:block;height:100%;background:var(--g);border-radius:999px}
.list-line{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px}
.list-line:last-child{border-bottom:none}
.list-line .r{color:var(--muted)}

/* 日历 */
.calendar{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.cal-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line)}
.cal-head .mon{font-weight:700;font-size:16px}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr)}
.cal-grid .dow{text-align:center;padding:8px;font-size:12px;color:var(--muted);background:#fafbfa}
.cal-cell{min-height:92px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:6px;font-size:12px;position:relative}
.cal-cell{cursor:pointer;transition:background .15s}
.cal-cell:hover{background:#f2faf7}
.cal-cell.off:hover{background:#fdeaea}
.cal-cell:nth-child(7n){border-right:none}
.cal-cell .dn{font-weight:700;color:var(--ink)}
.cal-cell.other .dn{color:#cdd}
.cal-cell.today{background:#fff8ef}
.cal-cell.today .dn{color:var(--o)}
.evt{margin-top:4px;padding:2px 6px;border-radius:6px;font-size:11px;line-height:1.3;margin-bottom:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.evt-b{background:#e6f6f0;color:var(--g-deep)}
.evt-p{background:#fff3e6;color:#d9760a}
.evt-x{background:#fdeaea;color:#d9534f}

/* 分布条 */
.bar-row{display:flex;align-items:center;gap:12px;margin-bottom:12px;font-size:14px}
.bar-row .name{width:90px;color:var(--muted);flex-shrink:0}
.bar-row .track{flex:1;background:#eef2ef;border-radius:999px;height:14px;overflow:hidden}
.bar-row .track > i{display:block;height:100%;background:var(--g);border-radius:999px}
.bar-row .val{width:60px;text-align:right;color:var(--ink);font-weight:600}

/* 老师简历 */
.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px 14px;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px}
.check-item{display:flex;align-items:center;gap:6px;font-weight:400;color:var(--ink);font-size:13.5px}
.resume-preview{border:1px dashed var(--line);border-radius:14px;padding:18px}
.rp-head{display:flex;align-items:center;gap:13px}
/* 头像图片填充（teacher_avatar() 输出）：继承容器圆角与尺寸 */
.av-img{width:100%;height:100%;object-fit:cover;display:block;border-radius:inherit}
.av-char{font-weight:800}
.rp-av{width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,var(--g),#19B98C);color:#fff;display:grid;place-items:center;font-weight:800;font-size:20px}
.rp-name{font-weight:700;font-size:16px;display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.rp-v{font-size:11px;font-weight:600;color:var(--g-deep);background:#e6f6f0;border-radius:999px;padding:2px 9px}
.rp-meta{font-size:12.5px;color:var(--muted);margin-top:2px}
.rp-rate{margin-left:auto;text-align:right;font-weight:800;color:var(--o);font-size:19px}
.rp-rate small{display:block;font-size:11px;color:var(--muted);font-weight:500}
.rp-tags{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0}
.rp-bio{font-size:13.5px;color:var(--ink);line-height:1.7}
.rp-sec{margin-top:14px;padding-top:12px;border-top:1px dashed var(--line)}
.rp-sec h5{font-size:13px;color:var(--g-deep);margin-bottom:6px}
.rp-sec p{font-size:13px;color:var(--muted);line-height:1.75;white-space:pre-line}

/* 家长端 · 教师简历 */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.filter-bar select,.filter-bar input{padding:9px 12px;border:1.5px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit;background:#fff;color:var(--ink)}
.filter-bar input{flex:1;min-width:180px}
.tlist{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.tcard{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:12px;transition:.2s}
.tcard:hover{box-shadow:0 12px 30px rgba(19,32,25,.10);transform:translateY(-3px);border-color:#d5e6dd}
.tc-head{display:flex;align-items:center;gap:12px}
.tc-av{width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,var(--g),#19B98C);color:#fff;display:grid;place-items:center;font-weight:800;font-size:19px;flex-shrink:0}
.tc-name{font-weight:700;font-size:15.5px;display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.tc-v{font-size:11px;font-weight:600;color:var(--g-deep);background:#e6f6f0;border-radius:999px;padding:2px 8px}
.tc-meta{font-size:12.5px;color:var(--muted);margin-top:2px}
.tc-rate{margin-left:auto;text-align:right;font-weight:800;color:var(--o);font-size:18px}
.tc-rate small{display:block;font-size:11px;color:var(--muted);font-weight:500}
.tc-tags{display:flex;flex-wrap:wrap;gap:6px}
.tc-bio{font-size:13.5px;color:var(--ink);line-height:1.7;flex:1}
.tc-foot{display:flex;justify-content:flex-end;gap:8px;padding-top:12px;border-top:1px dashed var(--line)}

@media(max-width:900px){
  .side{display:none}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr 1fr}
  .tlist{grid-template-columns:1fr}
}