:root{
  --primary:#0b7a6f;
  --primary2:#13988a;
  --primary-soft:#e8f6f3;
  --navy:#18364b;
  --ink:#17324a;
  --muted:#72818e;
  --bg:#f4f7f9;
  --card:#fff;
  --line:#dde6ea;
  --danger:#c83d4b;
  --danger-soft:#fff0f2;
  --warning:#bd7913;
  --warning-soft:#fff7e7;
  --success:#14835a;
  --success-soft:#eaf8f1;
  --shadow:0 10px 28px rgba(17,50,70,.08);
  --radius:22px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Tahoma,Arial,sans-serif}
body{min-height:100vh}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
button:disabled{opacity:.5;cursor:not-allowed}
svg{display:block}
.app-shell{width:100%;max-width:520px;margin:0 auto;min-height:100vh;padding-bottom:91px}
.app-main{padding:15px}
.topbar{
  position:sticky;top:0;z-index:30;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 15px calc(11px + env(safe-area-inset-top));
  background:rgba(255,255,255,.94);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line)
}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:44px;height:44px;border-radius:15px;background:linear-gradient(145deg,var(--primary),#17a895);
  color:white;display:grid;place-items:center;box-shadow:0 8px 18px rgba(11,122,111,.25)
}
.brand-text b{display:block;font-size:17px}.brand-text small{display:block;color:var(--muted);font-size:10px;margin-top:3px}
.icon-btn{
  width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:14px;
  display:grid;place-items:center;color:var(--ink)
}
.bottom-nav{
  position:fixed;z-index:35;bottom:0;left:50%;transform:translateX(-50%);
  width:min(520px,100%);display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border-top:1px solid var(--line);
  padding:7px 7px calc(7px + env(safe-area-inset-bottom));box-shadow:0 -8px 22px rgba(20,43,58,.06)
}
.nav-btn{
  border:0;background:none;color:#80909c;min-height:56px;border-radius:14px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:10px;font-weight:800
}
.nav-btn.active{color:var(--primary);background:#eff8f6}
.nav-btn svg{width:22px;height:22px}
.page-title{margin:2px 2px 14px}.page-title h1{font-size:23px;margin:0}.page-title p{font-size:12px;color:var(--muted);margin:5px 0 0;line-height:1.6}
.hero{
  background:linear-gradient(135deg,var(--navy),var(--primary));
  color:#fff;border-radius:26px;padding:18px;box-shadow:0 16px 34px rgba(20,57,71,.17);position:relative;overflow:hidden
}
.hero:after{content:"";position:absolute;width:180px;height:180px;border:32px solid rgba(255,255,255,.055);border-radius:50%;left:-86px;top:-77px}
.hero h2{font-size:21px;margin:0 0 5px;position:relative;z-index:1}.hero p{font-size:11px;color:#d8efec;margin:0;line-height:1.8;position:relative;z-index:1}
.hero-row{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.hero-badge{position:relative;z-index:1;background:#ffffff18;border:1px solid #ffffff25;padding:8px 10px;border-radius:14px;font-size:11px;font-weight:800}
.quick-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:12px}
.quick-card{
  border:1px solid var(--line);background:#fff;border-radius:20px;padding:14px;min-height:112px;
  display:flex;flex-direction:column;align-items:flex-start;justify-content:space-between;text-align:right;color:var(--ink);box-shadow:var(--shadow)
}
.quick-card .q-icon{width:45px;height:45px;border-radius:15px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center}
.quick-card b{font-size:14px}.quick-card small{font-size:10px;color:var(--muted);line-height:1.5}
.section{margin-top:15px}
.section-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:0 2px 9px}
.section-head b{font-size:14px}.section-head span,.section-head button{font-size:11px;color:var(--muted)}
.link-btn{border:0;background:none;color:var(--primary)!important;font-weight:800;padding:4px}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:17px;padding:11px;text-align:center;box-shadow:0 5px 18px rgba(17,50,70,.045)
}
.stat b{display:block;font-size:22px;color:var(--navy)}.stat span{font-size:9px;color:var(--muted)}
.card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:0 5px 20px rgba(17,50,70,.045)}
.empty{text-align:center;padding:30px 17px;background:#fff;border:1px dashed #ccd9df;border-radius:20px;color:var(--muted)}
.empty-icon{width:56px;height:56px;margin:0 auto 9px;border-radius:18px;background:var(--primary-soft);display:grid;place-items:center;color:var(--primary)}
.empty b{display:block;color:var(--ink);font-size:14px}.empty small{font-size:10px;line-height:1.6}
.list{display:flex;flex-direction:column;gap:9px}
.list-item{background:#fff;border:1px solid var(--line);border-radius:18px;padding:11px;display:flex;align-items:center;gap:10px}
.list-item-main{flex:1;min-width:0}.list-item-main b{display:block;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.list-item-main small{display:block;font-size:10px;color:var(--muted);margin-top:4px;line-height:1.5}
.avatar{width:49px;height:49px;border-radius:16px;background:linear-gradient(145deg,#e7f6f3,#e8effa);display:grid;place-items:center;color:var(--primary);font-weight:900;font-size:19px;flex:0 0 49px;overflow:hidden}
.avatar img{width:100%;height:100%;object-fit:cover}
.more-btn{width:38px;height:38px;border:0;background:#f2f6f7;border-radius:12px;color:var(--muted);display:grid;place-items:center;flex:0 0 38px}
.pill{display:inline-flex;align-items:center;gap:4px;padding:5px 8px;border-radius:999px;font-size:9px;font-weight:900}
.pill.success{background:var(--success-soft);color:var(--success)}.pill.warning{background:var(--warning-soft);color:var(--warning)}.pill.danger{background:var(--danger-soft);color:var(--danger)}
.btn{
  min-height:47px;border:0;border-radius:15px;padding:10px 14px;font-weight:900;
  display:inline-flex;align-items:center;justify-content:center;gap:8px
}
.btn.primary{background:var(--primary);color:#fff}.btn.secondary{background:var(--primary-soft);color:var(--primary)}.btn.light{background:#fff;color:var(--ink);border:1px solid var(--line)}.btn.danger{background:var(--danger-soft);color:var(--danger)}
.btn.full{width:100%}
.btn svg{width:19px;height:19px}
.action-row{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}
.action-row.three{grid-template-columns:repeat(3,1fr)}
.search{position:relative;margin-bottom:11px}
.search input{width:100%;height:48px;border:1px solid var(--line);background:#fff;border-radius:15px;padding:0 43px 0 12px;outline:none}
.search svg{position:absolute;right:14px;top:14px;width:20px;color:#85949e}
.form-card{background:#fff;border:1px solid var(--line);border-radius:21px;padding:14px}
.field{margin-bottom:12px}.field:last-child{margin-bottom:0}
.field label{display:block;font-size:11px;font-weight:900;margin-bottom:6px;color:#455a69}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;padding:11px 12px;outline:none;color:var(--ink)
}
.field input,.field select{height:47px}.field textarea{min-height:110px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:#59b7ae;box-shadow:0 0 0 3px rgba(11,122,111,.08)}
.hint{font-size:9px;color:var(--muted);line-height:1.6;margin-top:5px}
.tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;background:#edf3f4;padding:5px;border-radius:15px;margin-bottom:12px}
.tab{border:0;background:transparent;border-radius:11px;height:39px;color:#62737e;font-size:10px;font-weight:900}
.tab.active{background:#fff;color:var(--primary);box-shadow:0 3px 11px rgba(16,46,64,.07)}
.photo-box{display:flex;align-items:center;gap:11px;border:1px dashed #c8d6dc;background:#fafcfc;border-radius:16px;padding:10px}
.photo-preview{width:70px;height:70px;border-radius:18px;background:#e8f4f2;display:grid;place-items:center;color:var(--primary);font-size:23px;font-weight:900;overflow:hidden;flex:0 0 70px}
.photo-preview img{width:100%;height:100%;object-fit:cover}
.file-button{position:relative;overflow:hidden;display:block;width:100%;background:var(--primary-soft);color:var(--primary);padding:9px;border-radius:12px;text-align:center;font-size:10px;font-weight:900}
.file-button input{position:absolute;inset:0;opacity:0}
.import-zone{position:relative;border:2px dashed #b9d4d1;border-radius:18px;background:#f6fbfa;text-align:center;padding:21px 12px}
.import-zone input{position:absolute;inset:0;opacity:0;width:100%;height:100%}
.import-zone .imp-icon{width:49px;height:49px;margin:0 auto 8px;border-radius:16px;background:#e5f3ff;color:#2e6da4;display:grid;place-items:center}
.import-zone b{display:block;font-size:13px}.import-zone small{display:block;font-size:9px;color:var(--muted);margin-top:5px;line-height:1.6}
.preview-table{margin-top:11px;border:1px solid var(--line);border-radius:15px;overflow:auto;max-height:270px}
.preview-table table{width:100%;border-collapse:collapse;min-width:450px;font-size:10px}
.preview-table th,.preview-table td{padding:9px;border-bottom:1px solid #edf1f2;text-align:right}.preview-table th{background:#f6f9fa;position:sticky;top:0}
.attendance-class{display:flex;gap:8px;overflow:auto;padding-bottom:5px;margin-bottom:10px;scrollbar-width:none}.attendance-class::-webkit-scrollbar{display:none}
.class-chip{border:1px solid var(--line);background:#fff;border-radius:14px;padding:9px 12px;white-space:nowrap;font-size:10px;font-weight:900;color:#526573}
.class-chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.att-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:11px;display:flex;align-items:center;gap:10px}
.att-status{display:flex;gap:6px}
.status-btn{width:42px;height:42px;border:0;border-radius:13px;background:#f3f6f7;color:#71808a;display:grid;place-items:center}
.status-btn.absent.active{background:var(--danger-soft);color:var(--danger);box-shadow:inset 0 0 0 1px #f4c7ce}
.status-btn.present.active{background:var(--success-soft);color:var(--success);box-shadow:inset 0 0 0 1px #c4ead6}
.att-summary{position:sticky;bottom:78px;z-index:20;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:0 12px 28px rgba(18,47,64,.14);display:grid;grid-template-columns:1fr auto;gap:9px;align-items:center;margin-top:12px}
.summary-counts{display:flex;gap:11px;font-size:10px}.summary-counts b{font-size:15px}
.settings-group{margin-bottom:14px}.settings-title{font-size:11px;font-weight:900;color:#6f7f8a;margin:0 3px 7px}
.settings-item{width:100%;border:0;background:#fff;border-bottom:1px solid #edf1f2;min-height:62px;display:flex;align-items:center;gap:10px;text-align:right;padding:10px;color:var(--ink)}
.settings-item:first-child{border-radius:18px 18px 0 0}.settings-item:last-child{border-bottom:0;border-radius:0 0 18px 18px}.settings-item:only-child{border-radius:18px}
.settings-icon{width:40px;height:40px;border-radius:13px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;flex:0 0 40px}
.settings-info{flex:1}.settings-info b{display:block;font-size:12px}.settings-info small{display:block;color:var(--muted);font-size:9px;margin-top:4px}
.report-row{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}
.login-shell{min-height:100vh;max-width:520px;margin:0 auto;display:flex;flex-direction:column;padding:calc(26px + env(safe-area-inset-top)) 18px 24px;background:linear-gradient(180deg,#eef8f6 0,#f7f9fa 44%,#fff 100%)}
.login-logo{width:82px;height:82px;border-radius:27px;background:linear-gradient(145deg,var(--primary),#18a894);color:#fff;display:grid;place-items:center;margin:33px auto 16px;box-shadow:0 15px 32px rgba(11,122,111,.24)}
.login-head{text-align:center}.login-head h1{font-size:31px;margin:0}.login-head p{font-size:11px;color:var(--muted);line-height:1.7;margin:7px 0 23px}
.login-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:16px;box-shadow:var(--shadow)}
.demo-note{background:#f4f8fa;border:1px solid #dde7eb;border-radius:14px;padding:9px 10px;font-size:9px;color:#647681;line-height:1.7;margin-top:10px}
.demo-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:8px}
.demo-btn{border:0;background:#eff7f5;color:var(--primary);border-radius:11px;padding:8px;font-size:9px;font-weight:900}
.modal-backdrop{position:fixed;inset:0;background:rgba(7,22,34,.55);z-index:80;display:flex;align-items:flex-end;justify-content:center}
.sheet{width:min(520px,100%);max-height:92dvh;overflow:auto;background:#fff;border-radius:27px 27px 0 0;padding:11px 16px calc(18px + env(safe-area-inset-bottom));animation:sheetUp .2s ease-out}
@keyframes sheetUp{from{transform:translateY(25px);opacity:.7}to{transform:none;opacity:1}}
.grabber{width:45px;height:5px;background:#d5dde1;border-radius:99px;margin:1px auto 13px}
.sheet h2{font-size:19px;margin:0}.sheet-sub{font-size:10px;color:var(--muted);line-height:1.7;margin:5px 0 13px}
.sheet-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:13px}
.toast{position:fixed;z-index:110;bottom:98px;left:50%;transform:translateX(-50%);background:#142c3c;color:#fff;padding:10px 13px;border-radius:13px;font-size:10px;box-shadow:0 10px 26px rgba(0,0,0,.2);max-width:calc(100% - 28px);text-align:center}
.notice{border-radius:14px;padding:10px;font-size:10px;line-height:1.7}.notice.info{background:#eef7ff;color:#35617f;border:1px solid #d5e9f6}.notice.warn{background:var(--warning-soft);color:#805913;border:1px solid #f3dfaf}
.divider{height:1px;background:#edf1f2;margin:12px 0}
.switch-row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.badge-admin{background:#ede9fe;color:#6d28d9}
.danger-zone{border-color:#f2d1d6;background:#fffafb}
@media(max-width:360px){
  .app-main{padding:12px}.quick-card{padding:12px}.stats-grid{gap:6px}.action-row.three{grid-template-columns:1fr}.att-status{gap:4px}.status-btn{width:38px;height:38px}
}