<style>
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;font-size:17px;background:#f1f5f9;color:#1e293b}
:root{--primary:#4f46e5;--primary-light:#eef2ff;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--orange:#f97316;--purple:#8b5cf6;--bg:#f8fafc;--card:#fff;--text:#1e293b;--text2:#64748b;--text3:#94a3b8;--border:#e2e8f0;--hover:#f1f5f9}
.app{width:100%;height:100dvh;margin:0 auto;display:flex;flex-direction:column;background:var(--bg);position:relative}
.app-body{flex:1;display:flex;flex-direction:column;min-height:0}
.main-col{order:1;flex:1;display:flex;flex-direction:column;min-height:0}
.tabbar__brand{display:none;align-items:center;gap:8px;font-size:17px;font-weight:600;padding:16px 14px;color:var(--primary);border-bottom:1px solid var(--border);margin-bottom:8px}
.topbar{flex-shrink:0;height:46px;display:flex;align-items:center;justify-content:space-between;padding:0 12px;background:var(--primary);color:#fff;border-bottom:1px solid var(--primary)}
.topbar__title{font-size:17px;font-weight:600;display:flex;align-items:center;gap:6px;color:#fff}
.topbar__back{font-size:16px;color:#fff;cursor:pointer;padding:4px 8px;border-radius:6px;background:rgba(255,255,255,0.15);font-weight:500}
.topbar__actions{display:flex;gap:6px;align-items:center}
.topbar__actions .btn{color:#fff;border-color:rgba(255,255,255,0.3)}
.pages{flex:1;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch}
.page{display:none;padding:12px;min-height:100%}
.page.active{display:block}
.tabbar{order:2;flex-shrink:0;height:56px;display:flex;align-items:center;background:var(--card);border-top:1px solid var(--border);padding:0 2px 2px}
.tabbar__brand{display:none}
.tab-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;padding:4px 0;cursor:pointer;color:var(--text2);font-size:14px;transition:color .15s;border:none;background:none}
.tab-item.active{color:var(--primary);background:none}
.tab-item__icon{font-size:24px;line-height:1}
.tab-item__label{font-size:14px}
.card{background:var(--card);border-radius:10px;padding:12px;margin-bottom:8px;border:1px solid var(--border)}
.card__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.card__header h2{font-size:17px;font-weight:600}
.card__body{font-size:16px;color:var(--text2)}
.form-group{margin-bottom:10px}
.form-group label{display:block;font-size:15px;font-weight:500;margin-bottom:3px;color:var(--text)}
.form-control{width:100%;height:38px;padding:0 10px;border:1px solid var(--border);border-radius:8px;font-size:16px;outline:none;background:var(--card);color:var(--text)}
.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(79,70,229,0.1)}
textarea.form-control{height:auto;padding:8px 10px;min-height:70px}
.search-dropdown-item:hover{background:#eef2ff;color:var(--primary)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:4px;padding:0 12px;height:34px;border-radius:8px;font-size:15px;font-weight:500;cursor:pointer;border:none;transition:all .15s;white-space:nowrap}
.btn--primary{background:var(--primary);color:#fff}
.btn--success{background:var(--success);color:#fff}
.btn--warning{background:var(--warning);color:#fff}
.btn--danger{background:var(--danger);color:#fff}
.btn--outline{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn--outline:hover{background:var(--hover)}
.btn--ghost{background:transparent;color:var(--primary);border:1px solid var(--primary)}
.btn--ghost:hover{background:var(--primary-light)}
.btn--sm{height:32px;padding:0 10px;font-size:16px}
.btn--xs{height:30px;padding:0 8px;font-size:15px;border-radius:7px}
.btn--block{width:100%}
.btn-group{display:flex;gap:10px;flex-wrap:wrap}
.table-wrap{overflow-x:auto;margin-bottom:6px}
table{width:100%;border-collapse:collapse;font-size:15px}
th{background:var(--bg);color:var(--text2);font-weight:500;padding:7px 6px;text-align:left;border-bottom:1px solid var(--border);font-size:14px;white-space:nowrap}
td{padding:7px 6px;border-bottom:1px solid var(--border);font-size:15px}
tr:hover{background:var(--hover)}
.tag{display:inline-flex;align-items:center;padding:2px 6px;border-radius:4px;font-size:14px;font-weight:500}
.tag--green{background:#d1fae5;color:#065f46}
.tag--red{background:#fee2e2;color:#991b1b}
.tag--yellow{background:#fef3c7;color:#92400e}
.tag--blue{background:#dbeafe;color:#1e40af}
.tag--purple{background:#f3e8ff;color:#6b21a8}
.tag--gray{background:#f1f5f9;color:#475569}
.modal-mask{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.4);z-index:600;display:none;align-items:flex-end;justify-content:center}
.modal-mask.show{display:flex}
.modal-mask.center{align-items:center}
.sheet{background:var(--card);border-radius:18px 18px 0 0;width:100%;max-height:80%}
.modal-center{background:var(--card);border-radius:16px;width:calc(100% - 32px);max-width:340px;max-height:75%;margin:0 16px;position:relative;display:flex;flex-direction:column;overflow:hidden}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:14px 10px 12px 16px;flex-shrink:0;background:var(--card);border-bottom:1px solid var(--border);border-radius:16px 16px 0 0}
.modal-head h3{margin:0 !important;font-size:17px;font-weight:600;flex:1;order:1}
.modal-head .modal-center__close{position:static;margin-left:auto;background:var(--primary-light);width:26px;height:26px;flex-shrink:0;order:2}
.modal-body{flex:1;overflow-y:auto;padding:14px 16px 16px}
.modal-center__close{position:absolute;top:8px;right:10px;font-size:16px;cursor:pointer;color:var(--text2);background:none;border:none;width:26px;height:26px;display:flex;align-items:center;justify-content:center;border-radius:50%}
.search-wrap{display:flex;align-items:center;border:1px solid var(--border);border-radius:8px;padding:0 8px;background:var(--card);height:36px;margin-bottom:6px}
.search-wrap .search-icon{font-size:16px;color:var(--text2);flex-shrink:0;margin-right:4px}
.search-wrap input{border:none;outline:none;flex:1;height:34px;font-size:15px;background:transparent;padding:0 6px}
.search-clear{width:18px;height:18px;border-radius:50%;background:var(--text2);color:#fff;font-size:14px;display:none;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0}
.search-wrap.input-filled .search-clear{display:flex}
.chips{display:flex;gap:4px;flex-wrap:wrap;padding:2px 0}
.chip{padding:3px 10px;border-radius:14px;font-size:14px;border:1px solid var(--border);background:var(--card);color:var(--text2);cursor:pointer;white-space:nowrap}
.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.query-wrap{position:sticky;top:0;z-index:20;background:var(--bg);padding:4px 0 0}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px}
.grid-4{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.stat-card{padding:6px;border-radius:8px;background:var(--bg);text-align:center}
.stat-card .sc-num{font-size:16px;font-weight:700;color:var(--primary);word-break:break-all}
.stat-card .sc-label{font-size:13px;color:var(--text2);margin-top:2px}
.menu-item{display:flex;align-items:center;gap:8px;padding:10px 6px;cursor:pointer;font-size:16px;font-weight:500;border-bottom:1px solid var(--border);transition:background .15s}
.menu-item:last-child{border-bottom:none}
.menu-item:hover{background:var(--hover)}
.menu-item__icon{font-size:18px;flex-shrink:0}
.menu-item__arrow{margin-left:auto;color:var(--text2);font-size:17px}
.divider{height:1px;background:var(--border);margin:8px 0}
.empty-state{text-align:center;padding:24px 0;color:var(--text2);font-size:16px}
.empty-state .icon{font-size:32px;display:block;margin-bottom:6px}
.flow-nodes{display:flex;align-items:center;gap:4px;flex-wrap:wrap;margin-bottom:6px}
.flow-node{display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px;background:var(--primary-light);border-radius:8px;min-width:70px;text-align:center}
.flow-node .fn-icon{font-size:18px}
.flow-node .fn-name{font-size:14px;font-weight:500;color:var(--primary)}
.flow-node .fn-desc{font-size:14px;color:var(--text2)}
.flow-arrow{color:var(--text3);font-size:15px;flex-shrink:0}
.state-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.state-card{padding:8px;border-radius:8px;border:1px solid var(--border)}
.state-card .sc-label{font-size:14px;color:var(--text2);margin-bottom:2px}
.state-card .sc-value{font-size:16px;font-weight:600}
.rule-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.rule-card{padding:10px;border-radius:8px;background:var(--bg)}
.rule-card .rc-icon{font-size:16px;margin-bottom:2px}
.rule-card .rc-title{font-size:15px;font-weight:600;margin-bottom:2px}
.rule-card .rc-desc{font-size:14px;color:var(--text2)}
#toast{position:fixed;top:50px;left:50%;transform:translateX(-50%);z-index:700;padding:8px 16px;border-radius:8px;font-size:15px;font-weight:500;display:none;max-width:80%;text-align:center;pointer-events:none}
#toast.show{display:block}
#toast.success{background:#065f46;color:#fff}
#toast.error{background:#991b1b;color:#fff}
#toast.warning{background:#92400e;color:#fff}
/* Login */
#loginOverlay{position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,#667eea,#764ba2);z-index:500;display:flex;align-items:center;justify-content:center;flex-direction:column}
#loginOverlay.hidden{display:none}.hidden{display:none!important}.login-box{background:var(--card);border-radius:20px;padding:32px 24px;max-width:360px;width:90%;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,0.2)}
.login-box h2{font-size:20px;font-weight:700;margin-bottom:4px}.login-box .sub{font-size:16px;color:var(--text2);margin-bottom:20px}
.login-box .login-input{margin-bottom:12px;display:flex;flex-direction:column;gap:10px;text-align:left}
.login-box .login-links{display:flex;justify-content:space-between;font-size:15px;color:var(--text2);margin-top:8px}
.login-box .login-links span{cursor:pointer;color:var(--primary);text-decoration:underline}
/* Calendar */
.calendar-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:2px;text-align:center}
.calendar-grid .cg-hd{padding:4px;font-size:14px;font-weight:600;color:var(--text2)}
.calendar-grid .cg-day{padding:6px 2px;border-radius:4px;font-size:14px;cursor:pointer;min-height:28px;position:relative}
.calendar-grid .cg-day:hover{background:var(--hover)}
.calendar-grid .cg-day.has-class{background:var(--primary-light);font-weight:600}
.calendar-grid .cg-day.high{background:#4f46e5;color:#fff}
.calendar-grid .cg-day.medium{background:#818cf8;color:#fff}
.calendar-grid .cg-day.low{background:#c7d2fe;color:var(--text)}
.calendar-grid .cg-day.today{box-shadow:inset 0 0 0 2px var(--primary)}
.calendar-grid .cg-day .cal-sub{font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--primary)}
.calendar-grid .cg-day.high .cal-sub,.calendar-grid .cg-day.medium .cal-sub{color:rgba(255,255,255,.92);font-weight:500}
.calendar-grid .cg-day.low .cal-sub{color:#4f46e5}
.cal-nav{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.cal-nav button{width:28px;height:28px;border:none;background:var(--hover);border-radius:6px;cursor:pointer;font-size:17px}
.cal-nav .cal-month{font-size:17px;font-weight:600}
/* Duration btns */
.dur-btn{min-width:50px;padding:6px 10px;border:1px solid var(--border);border-radius:6px;background:var(--card);cursor:pointer;font-size:15px;font-weight:500;text-align:center;transition:all .15s}
.dur-btn:hover,.dur-btn.active{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
/* Student picker */
.stu-picker{position:relative}
.stu-picker .stu-picker-list{display:none;position:absolute;top:100%;left:0;right:0;z-index:110;background:var(--card);border:1px solid var(--border);border-radius:8px;max-height:160px;overflow-y:auto;box-shadow:0 4px 12px rgba(0,0,0,0.1)}
.stu-picker .stu-picker-list.show{display:block}
.stu-picker .stu-picker-list .sp-item{padding:6px 10px;cursor:pointer;font-size:15px;border-bottom:1px solid var(--border)}
.stu-picker .stu-picker-list .sp-item:hover{background:var(--primary-light)}
/* Tab bar for sub-tabs */
.sub-tabbar{display:flex;gap:0;margin-bottom:8px;border-bottom:2px solid var(--border)}
.sub-tab{flex:1;padding:8px;font-size:15px;font-weight:500;cursor:pointer;color:var(--text2);border-bottom:2px solid transparent;margin-bottom:-2px;text-align:center;transition:all .15s}
.sub-tab.active{color:var(--primary);border-bottom-color:var(--primary)}
/* Flow items */
.flow-item{display:flex;align-items:flex-start;gap:8px;padding:6px 0;border-bottom:1px solid var(--border)}
.flow-item:last-child{border-bottom:none}
.flow-item .fi-icon{width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px;flex-shrink:0}
.flow-item .fi-icon.green{background:#d1fae5;color:#065f46}
.flow-item .fi-icon.red{background:#fee2e2;color:#991b1b}
.flow-item .fi-icon.purple{background:#f3e8ff;color:#6b21a8}
.flow-item .fi-icon.yellow{background:#fef3c7;color:#92400e}
.flow-item .fi-icon.blue{background:#dbeafe;color:#1e40af}
.flow-item .fi-body{flex:1}
.flow-item .fi-body .fi-desc{font-size:16px}
.flow-item .fi-body .fi-time{font-size:14px;color:var(--text2)}
.flow-item .fi-amount{font-size:16px;font-weight:600;white-space:nowrap}
.flow-item .fi-amount.positive{color:var(--success)}
.flow-item .fi-amount.negative{color:var(--danger)}
.flow-item .fi-amount.neutral{color:var(--primary)}
/* ===== Desktop Responsive (≥768px) ===== */
@media(min-width:768px){
  .grid-4{grid-template-columns:1fr 1fr 1fr 1fr}
  .stat-card{padding:8px}
  .stat-card .sc-num{font-size:18px}
  .stat-card .sc-label{font-size:14px}
  .app-body{flex-direction:row}
  .tabbar{order:0;width:224px;flex-shrink:0;height:auto;flex-direction:column;align-items:stretch;justify-content:flex-start;border-top:none;border-right:1px solid var(--border);padding:10px 10px;gap:2px}
  .tabbar__brand{display:flex}
  .tab-item{flex:none;flex-direction:row;justify-content:flex-start;align-items:center;gap:10px;padding:12px 14px;border-radius:8px}
  .tab-item__icon{font-size:20px}
  .tab-item__label{font-size:15px}
  .tab-item:hover{background:var(--hover)}
  .tab-item.active{background:var(--primary-light);color:var(--primary)}
  .topbar{height:52px;padding:0 20px}
  .page{padding:20px;max-width:1100px;margin:0 auto;width:100%}
  .modal-center{max-width:420px}
  .sheet{max-width:440px;border-radius:18px;margin:0 auto}
  #modal-signature{align-items:center}
  #modal-signature .sheet{max-width:480px;padding:24px;min-height:380px}
  #stuRenderList{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:8px}
  #stuRenderList .card{margin-bottom:0}
  .flow-nodes .flow-node{min-width:84px}
  .card{border-radius:12px}
  #toast{top:60px}
}
</style>
.menu-list{display:flex;flex-direction:column}
.menu-item__icon{font-size:18px;flex-shrink:0}
.badge{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 6px;border-radius:10px;background:var(--primary);color:#fff;font-size:12px;font-weight:600;margin-left:6px}
.modal__body{max-height:60vh;overflow-y:auto}
.date-row{display:flex;gap:6px;align-items:center;margin-bottom:6px}
.date-row input{flex:1;height:34px;font-size:15px;border:1px solid var(--border);border-radius:8px;padding:0 8px;background:var(--card);min-width:0}
