*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg:#f5f5f3; --surface:#fff; --surface1:#f9f9f8;
  --border:rgba(0,0,0,0.08); --border-s:rgba(0,0,0,0.14);
  --text:#1a1a18; --text2:#5a5a57; --text3:#8f8f8b;
  --accent:#185FA5; --accent-bg:#E6F1FB; --accent-b:#b5d4f4;
  --green-600:#3B6D11; --green-bg:#EAF3DE;
  --red-600:#A32D2D; --red-bg:#FCEBEB;
  --amber-600:#854F0B; --amber-bg:#FAEEDA;
  --purple-600:#534AB7; --purple-bg:#EEEDFE;
  --radius:7px;
  --font:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
}
body { font-family:var(--font); font-size:14px; color:var(--text); background:var(--bg); line-height:1.5; }
a { color:inherit; text-decoration:none; }
button { font-family:var(--font); cursor:pointer; }
input,select,textarea { font-family:var(--font); font-size:13px; }

.logo-mark { width:36px; height:36px; border-radius:9px; background:var(--accent); display:flex; align-items:center; justify-content:center; }
.logo-mark.sm { width:30px; height:30px; border-radius:7px; }

/* Login */
.login-page { display:flex; align-items:center; justify-content:center; min-height:100vh; background:var(--bg); padding:20px; }
.login-wrap { width:100%; max-width:380px; }
.login-card { background:var(--surface); border:0.5px solid var(--border-s); border-radius:14px; padding:32px 28px; text-align:center; }
.login-logo { display:flex; justify-content:center; margin-bottom:16px; }
.login-school { font-size:19px; font-weight:600; line-height:1.25; }
.login-sub { font-size:13px; color:var(--text3); margin-top:4px; margin-bottom:24px; }
.field { margin-bottom:14px; text-align:left; }
.field label { display:block; font-size:12px; font-weight:500; color:var(--text2); margin-bottom:5px; }
.field input, .field select, .field textarea { width:100%; padding:9px 11px; border:0.5px solid var(--border-s); border-radius:var(--radius); background:var(--surface1); color:var(--text); outline:none; transition:border .15s; }
.field input:focus, .field select:focus, .field textarea:focus { border-color:var(--accent); }
.field textarea { resize:vertical; }
.btn-login { width:100%; padding:10px; background:var(--accent); color:#fff; border:none; border-radius:var(--radius); font-size:14px; font-weight:500; margin-top:4px; }
.btn-login:hover { opacity:.9; }
.login-hint { font-size:12px; color:var(--text3); margin-top:16px; }
.login-foot { text-align:center; font-size:11px; color:var(--text3); margin-top:18px; }
.alert-error { background:var(--red-bg); color:var(--red-600); border:0.5px solid #f7c1c1; border-radius:var(--radius); padding:9px 12px; font-size:13px; margin-bottom:16px; text-align:left; }
.alert-warn { background:var(--amber-bg); color:var(--amber-600); border:0.5px solid #fac775; border-radius:var(--radius); padding:9px 12px; font-size:13px; }

/* Layout */
.sidebar { position:fixed; top:0; left:0; width:208px; height:100vh; background:var(--surface); border-right:0.5px solid var(--border); display:flex; flex-direction:column; z-index:100; overflow-y:auto; }
.main-content { margin-left:208px; min-height:100vh; padding:24px 28px; }
.mobile-menu-btn { display:none; position:fixed; top:12px; left:12px; z-index:120; width:38px; height:38px; border:0.5px solid var(--border-s); background:var(--surface); border-radius:var(--radius); align-items:center; justify-content:center; color:var(--text); }
.nav-overlay { display:none; position:fixed; inset:0; background:rgba(0,0,0,.3); z-index:99; }

/* Sidebar */
.sb-logo { display:flex; align-items:center; gap:9px; padding:16px 14px; border-bottom:0.5px solid var(--border); }
.sb-logo-text { display:flex; flex-direction:column; line-height:1.2; }
.sb-school { font-size:14px; font-weight:600; }
.sb-tag { font-size:10px; color:var(--text3); }
.sb-nav { padding:8px 0; flex:1; }
.sb-sec { display:block; padding:12px 14px 4px; font-size:10px; font-weight:500; color:var(--text3); text-transform:uppercase; letter-spacing:.07em; }
.sb-item { display:flex; align-items:center; gap:9px; padding:8px 14px; font-size:12.5px; color:var(--text2); border-left:2px solid transparent; transition:all .12s; }
.sb-item:hover { color:var(--text); background:var(--bg); }
.sb-item.active { color:var(--accent); background:var(--accent-bg); border-left-color:var(--accent); }
.sb-user { padding:12px 14px; border-top:0.5px solid var(--border); display:flex; align-items:center; gap:8px; }
.sb-avatar { width:30px; height:30px; border-radius:50%; background:var(--accent-bg); color:var(--accent); font-size:11px; font-weight:600; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.sb-user-info { flex:1; min-width:0; }
.sb-user-name { display:block; font-size:12px; font-weight:500; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.sb-user-role { display:block; font-size:11px; color:var(--text3); }
.sb-logout { color:var(--text3); padding:5px; border-radius:5px; flex-shrink:0; }
.sb-logout:hover { color:var(--text); background:var(--bg); }

/* Page */
.page-header { margin-bottom:20px; }
.page-header h2 { font-size:18px; font-weight:600; }
.page-header p { font-size:13px; color:var(--text2); margin-top:2px; }
.err-msg { padding:20px; color:var(--red-600); font-size:13px; }

/* Cards */
.card { background:var(--surface); border:0.5px solid var(--border); border-radius:12px; padding:16px 18px; margin-bottom:14px; }
.card.no-pad { padding:0; overflow:hidden; }
.card.no-pad .data-table th:first-child, .card.no-pad .data-table td:first-child { padding-left:16px; }
.card.no-pad .data-table th:last-child, .card.no-pad .data-table td:last-child { padding-right:16px; }
.card-title { font-size:13px; font-weight:600; margin-bottom:12px; }
.two-col { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.stat-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:10px; margin-bottom:18px; }
.stat-card { background:var(--surface1); border-radius:var(--radius); padding:14px; }
.stat-label { font-size:11px; color:var(--text3); margin-bottom:5px; }
.stat-val { font-size:22px; font-weight:600; }
.stat-val.sm { font-size:14px; margin-top:3px; }

.info-banner { background:var(--accent-bg); border:0.5px solid var(--accent-b); border-radius:var(--radius); padding:9px 12px; font-size:12px; color:var(--accent); margin-bottom:14px; display:flex; align-items:center; gap:7px; }
.info-banner svg { flex-shrink:0; }

/* Buttons */
.btn { padding:9px 18px; background:var(--accent); color:#fff; border:none; border-radius:var(--radius); font-size:13px; font-weight:500; }
.btn:hover { opacity:.9; }
.btn-ghost { padding:8px 14px; background:transparent; color:var(--text2); border:0.5px solid var(--border-s); border-radius:var(--radius); font-size:13px; }
.btn-ghost:hover { background:var(--bg); }
.btn-ghost-sm { padding:4px 10px; background:transparent; color:var(--text2); border:0.5px solid var(--border-s); border-radius:5px; font-size:11px; }
.btn-ghost-sm:hover { background:var(--bg); }
.btn-ghost-sm.danger { color:var(--red-600); border-color:#f7c1c1; }
.btn-ghost-sm.danger:hover { background:var(--red-bg); }
.save-bar { margin-top:14px; }

/* Filters */
.filter-row { display:flex; gap:8px; margin-bottom:14px; align-items:center; flex-wrap:wrap; }
.filter-row select, .filter-row input { padding:7px 10px; font-size:12px; border:0.5px solid var(--border-s); border-radius:var(--radius); background:var(--surface); color:var(--text); }
.static-label { padding:7px 12px; font-size:12px; font-weight:500; background:var(--surface1); border:0.5px solid var(--border); border-radius:var(--radius); }
.inline-select { padding:5px 8px; font-size:12px; border:0.5px solid var(--border-s); border-radius:5px; background:var(--surface); color:var(--text); }

/* Table */
.data-table { width:100%; border-collapse:collapse; font-size:13px; }
.data-table th { text-align:left; padding:9px 10px; font-size:11px; font-weight:500; color:var(--text3); border-bottom:0.5px solid var(--border); }
.data-table td { padding:9px 10px; border-bottom:0.5px solid var(--border); }
.data-table tr:last-child td { border:none; }
.data-table tbody tr:hover td { background:var(--surface1); }
.fw500 { font-weight:500; } .muted { color:var(--text3); }

/* Badges */
.badge { display:inline-block; padding:2px 8px; border-radius:4px; font-size:11px; font-weight:500; }
.badge-blue { background:var(--accent-bg); color:var(--accent); }
.badge-green { background:var(--green-bg); color:var(--green-600); }
.badge-red { background:var(--red-bg); color:var(--red-600); }
.badge-purple { background:var(--purple-bg); color:var(--purple-600); }
.badge-status { display:inline-block; padding:2px 8px; border-radius:4px; font-size:11px; font-weight:500; }
.status-p { background:var(--green-bg); color:var(--green-600); }
.status-a { background:var(--red-bg); color:var(--red-600); }
.status-l { background:var(--amber-bg); color:var(--amber-600); }
.chip-green { display:inline-flex; align-items:center; gap:4px; background:var(--green-bg); color:var(--green-600); border-radius:4px; padding:2px 8px; font-size:11px; font-weight:500; }
.chip-gray { background:var(--surface1); color:var(--text3); border:0.5px solid var(--border); border-radius:4px; padding:2px 8px; font-size:11px; display:inline-block; }

/* Attendance */
.att-summary { display:flex; gap:16px; margin-bottom:12px; }
.att-summary:empty { display:none; }
.sum-item { display:flex; align-items:center; gap:6px; font-size:13px; font-weight:500; }
.sum-item::before { content:''; width:9px; height:9px; border-radius:50%; }
.sum-item.present { color:var(--green-600); } .sum-item.present::before { background:var(--green-600); }
.sum-item.absent { color:var(--red-600); } .sum-item.absent::before { background:var(--red-600); }
.sum-item.late { color:var(--amber-600); } .sum-item.late::before { background:var(--amber-600); }
.mark-btns { display:flex; gap:3px; }
.mbtn { padding:4px 10px; border:0.5px solid var(--border-s); border-radius:4px; font-size:11px; background:var(--surface1); color:var(--text2); }
.mbtn:hover { background:var(--bg); }
.mbtn.active-p { background:var(--green-bg); color:var(--green-600); border-color:#c0dd97; }
.mbtn.active-a { background:var(--red-bg); color:var(--red-600); border-color:#f7c1c1; }
.mbtn.active-l { background:var(--amber-bg); color:var(--amber-600); border-color:#fac775; }
.teacher-row { display:flex; align-items:center; gap:8px; font-size:12px; color:var(--text2); margin-bottom:12px; }
.label-muted { color:var(--text3); }
.att-row { display:flex; align-items:center; gap:10px; margin-bottom:9px; }
.att-label { font-size:12px; min-width:90px; }
.att-bar-wrap { flex:1; height:7px; background:var(--surface1); border-radius:4px; overflow:hidden; }
.att-bar { height:100%; border-radius:4px; }
.att-pct { font-size:12px; font-weight:500; min-width:36px; text-align:right; }
.att-count { font-size:11px; color:var(--text3); min-width:42px; text-align:right; }

/* Timetable */
.tt-scroll { overflow-x:auto; }
.tt-grid-inner { display:grid; font-size:12px; min-width:560px; }
.tt-th { font-size:11px; font-weight:500; color:var(--text3); padding:8px 6px; text-align:center; border-bottom:0.5px solid var(--border); }
.tt-time-cell { font-size:10px; color:var(--text3); padding:4px 6px; border-bottom:0.5px solid var(--border); display:flex; align-items:center; justify-content:flex-end; }
.tt-cell { padding:3px; border-bottom:0.5px solid var(--border); border-left:0.5px solid var(--border); }
.tt-block { border-radius:5px; padding:5px 7px; min-height:50px; display:flex; flex-direction:column; justify-content:center; }
.tt-sub { font-weight:500; font-size:11px; }
.tt-teacher { font-size:10px; opacity:.75; margin-top:1px; }
.tt-mine { outline:2px solid var(--accent); outline-offset:-1px; }
.tt-edit:hover { opacity:.8; }

/* Notices */
.notice-item { padding:13px 0; border-bottom:0.5px solid var(--border); }
.notice-item:last-child { border:none; }
.notice-meta { display:flex; align-items:center; gap:7px; flex-wrap:wrap; margin-bottom:4px; }
.notice-date { font-size:11px; color:var(--text3); }
.notice-target { font-size:11px; color:var(--text2); background:var(--surface1); border:0.5px solid var(--border); padding:2px 7px; border-radius:4px; }
.notice-title { font-size:13.5px; font-weight:600; margin-bottom:3px; }
.notice-body { font-size:12.5px; color:var(--text2); line-height:1.6; }
.notice-by { font-size:11px; color:var(--text3); margin-top:5px; }

/* Lists */
.list-row { padding:7px 0; border-bottom:0.5px solid var(--border); display:flex; align-items:center; gap:8px; }
.list-row:last-child { border:none; }
.list-title { flex:1; font-size:12px; font-weight:500; }
.list-sub, .list-time { font-size:11px; color:var(--text3); white-space:nowrap; }
.empty-msg { font-size:12px; color:var(--text3); padding:8px 0; }
.subject-badge { padding:2px 8px; border-radius:4px; font-size:11px; font-weight:500; }

/* Forms */
.form-grid { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.mini-avatar { width:26px; height:26px; border-radius:50%; background:var(--accent-bg); color:var(--accent); font-size:10px; font-weight:600; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.form-hint { font-size:12px; color:var(--text3); margin:-2px 0 12px; line-height:1.5; }

/* Toast */
#toast { position:fixed; bottom:24px; right:24px; padding:11px 18px; border-radius:var(--radius); font-size:13px; font-weight:500; z-index:999; opacity:0; transition:opacity .2s; pointer-events:none; }
#toast.show { opacity:1; }
#toast.ok { background:#1a1a18; color:#fff; }
#toast.error { background:var(--red-600); color:#fff; }

/* Builder bar */
.builder-bar { display:flex; justify-content:space-between; align-items:flex-end; gap:12px; margin-bottom:16px; flex-wrap:wrap; }
.builder-bar form { display:flex; flex-direction:column; gap:5px; }
.bar-label { font-size:11px; font-weight:500; color:var(--text3); }
.builder-bar select { padding:8px 12px; font-size:13px; border:0.5px solid var(--border-s); border-radius:var(--radius); background:var(--surface); color:var(--text); min-width:180px; }
.bar-actions { display:flex; gap:8px; flex-wrap:wrap; }
.btn-soft { display:inline-flex; align-items:center; gap:6px; padding:9px 14px; background:var(--surface1); color:var(--text2); border:0.5px solid var(--border-s); border-radius:var(--radius); font-size:13px; font-weight:500; }
.btn-soft:hover { background:var(--bg); color:var(--text); }
.btn svg, .btn-soft svg { flex-shrink:0; }
.btn { display:inline-flex; align-items:center; gap:6px; }

/* Empty state */
.empty-state { text-align:center; padding:48px 20px; color:var(--text3); }
.empty-state svg { color:var(--border-s); margin-bottom:12px; }
.empty-state p { font-size:14px; margin-bottom:16px; }

/* Period head (desktop) */
.tt-period-head { padding:8px 6px; border-bottom:0.5px solid var(--border); display:flex; flex-direction:column; align-items:center; justify-content:center; gap:1px; cursor:pointer; position:relative; transition:background .12s; background:var(--surface1); }
.tt-period-head:hover { background:var(--accent-bg); }
.pph-time { font-size:12px; font-weight:600; color:var(--text); }
.pph-label { font-size:9px; color:var(--text3); }
.pph-edit { color:var(--accent); opacity:0; position:absolute; top:5px; right:5px; transition:opacity .12s; }
.tt-period-head:hover .pph-edit { opacity:1; }

/* Empty cell + plus */
.tt-block.tt-empty { background:var(--surface1); border:1px dashed var(--border-s); display:flex; align-items:center; justify-content:center; }
.tt-block.tt-empty:hover { background:var(--accent-bg); border-color:var(--accent-b); }
.tt-plus { font-size:18px; color:var(--text3); font-weight:300; }
.tt-block.tt-empty:hover .tt-plus { color:var(--accent); }

/* Show desktop, hide mobile by default */
.ttb-desktop { display:block; }
.ttb-mobile { display:none; }

/* Mobile day tabs + slots */
.day-tabs { display:flex; gap:4px; margin-bottom:14px; background:var(--surface1); padding:4px; border-radius:10px; }
.day-tab { flex:1; padding:9px 4px; font-size:12px; font-weight:500; border:none; background:transparent; color:var(--text2); border-radius:7px; }
.day-tab.active { background:var(--surface); color:var(--accent); box-shadow:0 1px 3px rgba(0,0,0,.06); }
.day-panel { display:none; }
.day-panel.active { display:block; }
.m-slot { display:flex; align-items:center; gap:12px; padding:13px 14px; background:var(--surface); border:0.5px solid var(--border); border-radius:11px; margin-bottom:8px; cursor:pointer; transition:border-color .12s; }
.m-slot:active { border-color:var(--accent-b); background:var(--accent-bg); }
.m-slot-time { flex-shrink:0; min-width:64px; }
.m-time { font-size:14px; font-weight:600; }
.m-plabel { font-size:10px; color:var(--text3); }
.m-slot-body { flex:1; display:flex; flex-direction:column; gap:3px; align-items:flex-start; }
.m-teacher { font-size:11px; color:var(--text2); }
.m-empty { font-size:12px; color:var(--text3); font-style:italic; }
.m-chevron { color:var(--text3); flex-shrink:0; }
.m-slot-mine { border-color:var(--accent); background:var(--accent-bg); }
.mine-tag { font-size:10px; font-weight:500; color:var(--accent); background:var(--surface); border:0.5px solid var(--accent-b); padding:2px 7px; border-radius:5px; flex-shrink:0; }

/* Subjects manager */
.subjects-card { max-width:560px; margin-top:14px; }
.subjects-list { display:flex; flex-wrap:wrap; gap:8px; margin-bottom:14px; }
.subject-chip-row { display:inline-flex; align-items:center; gap:3px; }
.chip-del { width:18px; height:18px; border:none; background:var(--surface1); color:var(--text3); border-radius:50%; font-size:14px; line-height:1; display:flex; align-items:center; justify-content:center; padding:0; }
.chip-del:hover { background:var(--red-bg); color:var(--red-600); }
.add-subject-row { display:flex; gap:8px; align-items:center; flex-wrap:wrap; padding-top:14px; border-top:0.5px solid var(--border); }
.add-subject-row input { flex:1; min-width:140px; padding:9px 11px; border:0.5px solid var(--border-s); border-radius:var(--radius); background:var(--surface1); }
.add-subject-row select { padding:9px 10px; border:0.5px solid var(--border-s); border-radius:var(--radius); background:var(--surface1); }

/* Modals */
.modal-overlay { display:none; position:fixed; inset:0; background:rgba(0,0,0,.4); z-index:200; align-items:center; justify-content:center; padding:20px; }
.modal-overlay.open { display:flex; }
.modal-sheet { background:var(--surface); border-radius:14px; width:100%; max-width:420px; overflow:hidden; box-shadow:0 12px 40px rgba(0,0,0,.18); animation:modalIn .18s ease; }
@keyframes modalIn { from{opacity:0;transform:translateY(12px) scale(.98)} to{opacity:1;transform:none} }
.modal-head { display:flex; align-items:center; justify-content:space-between; padding:16px 18px; border-bottom:0.5px solid var(--border); }
.modal-head h3 { font-size:15px; font-weight:600; }
.modal-close { width:28px; height:28px; border:none; background:var(--surface1); color:var(--text2); border-radius:7px; font-size:18px; line-height:1; }
.modal-close:hover { background:var(--bg); color:var(--text); }
.modal-body { padding:18px; }
.modal-body .field { margin-bottom:14px; }
.modal-body .field:last-child { margin-bottom:0; }
.modal-foot { display:flex; align-items:center; gap:8px; padding:14px 18px; border-top:0.5px solid var(--border); }
.modal-foot .btn-ghost:not(.danger-btn) { margin-left:auto; }
.danger-btn { color:var(--red-600); border-color:#f7c1c1; }
.danger-btn:hover { background:var(--red-bg); }

/* Responsive */
@media (max-width:960px) {
  .sidebar { width:188px; }
  .main-content { margin-left:188px; padding:22px 20px; }
  .stat-grid { grid-template-columns:repeat(4,1fr); }
}

@media (max-width:760px) {
  .sidebar { transform:translateX(-100%); transition:transform .22s ease; width:240px; box-shadow:2px 0 16px rgba(0,0,0,.08); }
  body.nav-open .sidebar { transform:translateX(0); }
  body.nav-open .nav-overlay { display:block; }
  .main-content { margin-left:0; padding:58px 16px 28px; }
  .mobile-menu-btn { display:flex; }
  .stat-grid { grid-template-columns:repeat(2,1fr); gap:8px; }
  .two-col { grid-template-columns:1fr; }
  .form-grid { grid-template-columns:1fr; }
  .page-header h2 { font-size:17px; }
  .card { padding:14px 14px; }
  .filter-row select, .filter-row input { flex:1; min-width:0; }
  /* Builder: switch to mobile cards */
  .ttb-desktop { display:none; }
  .ttb-mobile { display:block; }
  .builder-bar { flex-direction:column; align-items:stretch; }
  .builder-bar form { width:100%; }
  .builder-bar select { width:100%; min-width:0; }
  .bar-actions { width:100%; }
  .bar-actions .btn, .bar-actions .btn-soft { flex:1; justify-content:center; }
}

@media (max-width:440px) {
  .stat-grid { grid-template-columns:1fr 1fr; }
  .stat-val { font-size:19px; }
  .main-content { padding:56px 12px 24px; }
  .att-label { min-width:70px; font-size:11px; }
  .att-count { display:none; }
  .data-table th, .data-table td { padding:8px 7px; }
  .mbtn { padding:5px 9px; }
  .notice-title { font-size:13px; }
  .panel-actions { flex-direction:column; align-items:stretch; }
  .panel-actions .btn, .panel-actions .btn-ghost { width:100%; text-align:center; }
  .add-subject-row { flex-direction:column; align-items:stretch; }
  .add-subject-row .btn { width:100%; }
}

/* Touch targets on mobile */
@media (max-width:760px) {
  .sb-item { padding:11px 16px; font-size:13px; }
  .mbtn { min-width:34px; min-height:30px; }
  .btn, .btn-ghost { padding:10px 16px; }
}