/* ===== CampusOS — design system ===== */
:root{
  --indigo:#4338ca; --indigo-d:#3730a3; --indigo-l:#eef2ff;
  --ink:#1e1b39; --muted:#6b7280; --line:#e5e7eb; --bg:#f6f7fb; --card:#fff;
  --ok:#059669; --okbg:#ecfdf5; --warn:#d97706; --warnbg:#fffbeb; --err:#dc2626; --errbg:#fef2f2;
  --sky:#0ea5e9; --violet:#7c3aed; --rose:#e11d48;
  --radius:12px; --shadow:0 1px 3px rgba(16,24,40,.08),0 1px 2px rgba(16,24,40,.06);
  --shadow-l:0 10px 30px rgba(16,24,40,.12);
}
*{box-sizing:border-box} html,body{margin:0;padding:0}
body{font-family:'Segoe UI',-apple-system,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.45}
a{color:var(--indigo);text-decoration:none} h1,h2,h3{margin:0}

/* ===== App shell ===== */
.app{display:grid;grid-template-columns:248px 1fr;min-height:100vh}
.sidebar{background:linear-gradient(180deg,#1e1b39,#2b2660);color:#cdd0e8;display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{display:flex;align-items:center;gap:10px;padding:18px 18px 14px;border-bottom:1px solid rgba(255,255,255,.08)}
.brand .logo{width:34px;height:34px;border-radius:8px;background:#fff;display:grid;place-items:center;font-weight:800;color:var(--indigo)}
.brand b{color:#fff;font-size:16px;letter-spacing:.3px} .brand small{display:block;color:#9aa0c7;font-size:11px}
.nav{padding:8px 8px 24px;flex:1}
.nav .group{color:#7e84b3;font-size:10.5px;letter-spacing:1px;text-transform:uppercase;padding:14px 12px 6px}
.nav a{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:#cdd0e8;font-weight:500;cursor:pointer;transition:.12s}
.nav a .ic{width:18px;text-align:center;opacity:.85}
.nav a:hover{background:rgba(255,255,255,.07);color:#fff}
.nav a.active{background:var(--indigo);color:#fff;box-shadow:0 2px 8px rgba(67,56,202,.5)}

.main{display:flex;flex-direction:column;min-width:0}
.topbar{height:60px;background:var(--card);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 22px;position:sticky;top:0;z-index:20}
.topbar .inst{font-weight:700;color:var(--indigo)} .topbar .inst small{display:block;font-weight:400;color:var(--muted);font-size:11px}
.topbar .right{display:flex;align-items:center;gap:14px}
.search{display:flex;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:20px;padding:6px 14px;width:260px}
.search input{border:0;background:transparent;outline:none;width:100%;font-size:13px}
.pill{background:var(--indigo-l);color:var(--indigo-d);border-radius:20px;padding:5px 12px;font-size:12px;font-weight:600;cursor:pointer;border:0}
.usermenu{position:relative} .avatar{width:34px;height:34px;border-radius:50%;background:var(--indigo);color:#fff;display:grid;place-items:center;font-weight:700;cursor:pointer}
.dropdown{position:absolute;right:0;top:42px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow-l);min-width:180px;overflow:hidden;display:none}
.dropdown.open{display:block} .dropdown a{display:block;padding:10px 14px;color:var(--ink)} .dropdown a:hover{background:var(--bg)}
.content{padding:22px;max-width:1400px;width:100%}

/* ===== Page bits ===== */
.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;gap:12px;flex-wrap:wrap}
.page-head h2{font-size:21px;font-weight:700}
.row{display:flex;align-items:center} .row.gap{gap:10px} .wrap{flex-wrap:wrap} .grow{flex:1}
.muted{color:var(--muted)} .right{margin-left:auto}

/* cards & KPIs */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px;margin-bottom:18px}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.kpi .label{color:var(--muted);font-size:12px;font-weight:600} .kpi .val{font-size:26px;font-weight:800;margin-top:6px}
.kpi .ic{position:absolute;right:14px;top:14px;font-size:22px;opacity:.18}
.kpi.green{border-left:4px solid var(--ok)} .kpi.indigo{border-left:4px solid var(--indigo)}
.kpi.sky{border-left:4px solid var(--sky)} .kpi.amber{border-left:4px solid var(--warn)}
.kpi.rose{border-left:4px solid var(--rose)} .kpi.violet{border-left:4px solid var(--violet)}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:18px}
.panel h3{font-size:15px;margin-bottom:12px}
.grid2{display:grid;grid-template-columns:1.6fr 1fr;gap:18px} @media(max-width:1000px){.grid2{grid-template-columns:1fr}}

/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}
table.data{width:100%;border-collapse:collapse;font-size:13.5px}
table.data th{background:#f8f9fc;text-align:left;padding:11px 14px;font-weight:600;color:#475067;border-bottom:1px solid var(--line);white-space:nowrap}
table.data td{padding:10px 14px;border-bottom:1px solid #f1f2f7}
table.data tr:last-child td{border-bottom:0} table.data tbody tr:hover{background:#fafbff}
.num{text-align:right} .row-actions{white-space:nowrap}
.empty{padding:40px;text-align:center;color:var(--muted);background:var(--card);border:1px dashed var(--line);border-radius:var(--radius)}

/* buttons */
.btn{border:0;border-radius:8px;padding:9px 16px;font-weight:600;font-size:13px;cursor:pointer;transition:.12s}
.btn.primary{background:var(--indigo);color:#fff} .btn.primary:hover{background:var(--indigo-d)}
.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--ink)} .btn.ghost:hover{background:var(--bg)}
.btn.danger{background:var(--err);color:#fff} .btn.ok{background:var(--ok);color:#fff}
.btn:disabled{opacity:.6;cursor:not-allowed}
.icon-btn{border:0;background:transparent;cursor:pointer;font-size:15px;padding:5px 7px;border-radius:6px;color:var(--muted)}
.icon-btn:hover{background:var(--bg);color:var(--ink)} .icon-btn.danger:hover{color:var(--err);background:var(--errbg)}
.chip{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11.5px;font-weight:600}
.chip.green{background:var(--okbg);color:var(--ok)} .chip.red{background:var(--errbg);color:var(--err)}
.chip.amber{background:var(--warnbg);color:var(--warn)} .chip.gray{background:#f1f2f7;color:#6b7280} .chip.indigo{background:var(--indigo-l);color:var(--indigo-d)}

/* filters */
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:end;margin-bottom:16px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.filters .field{margin:0}

/* forms */
.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.field{display:flex;flex-direction:column;gap:5px;grid-column:span 1}
.field.col-2{grid-column:span 2} .field.col-3{grid-column:span 3} .field.col-4{grid-column:span 4}
.field label{font-size:12.5px;font-weight:600;color:#475067}
.field input,.field select,.field textarea{padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:13.5px;font-family:inherit;background:#fff;outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--indigo);box-shadow:0 0 0 3px var(--indigo-l)}
.field .hint{color:var(--muted);font-size:11px} .field label.check{flex-direction:row;align-items:center;gap:6px;font-weight:500}
@media(max-width:760px){.form-grid{grid-template-columns:1fr 1fr}.field.col-3,.field.col-4{grid-column:span 2}}

/* modal */
.modal-overlay{position:fixed;inset:0;background:rgba(20,18,45,.5);display:grid;place-items:center;z-index:100;padding:20px;backdrop-filter:blur(2px)}
.modal{background:#fff;border-radius:14px;box-shadow:var(--shadow-l);width:560px;max-width:100%;max-height:92vh;display:flex;flex-direction:column;animation:pop .15s ease}
.modal.modal-wide{width:920px} @keyframes pop{from{transform:scale(.96);opacity:0}to{transform:scale(1);opacity:1}}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.modal-head h3{font-size:16px} .modal-body{padding:20px;overflow-y:auto} .modal-foot{padding:14px 20px;border-top:1px solid var(--line);display:flex;justify-content:flex-end}
.confirm-msg{margin:0;font-size:14px}

/* toast */
#toasts{position:fixed;top:16px;right:16px;z-index:200;display:flex;flex-direction:column;gap:10px}
.toast{padding:12px 18px;border-radius:10px;color:#fff;box-shadow:var(--shadow-l);font-weight:500;transition:opacity .3s;max-width:340px}
.toast-ok{background:var(--ok)} .toast-err{background:var(--err)} .toast-info{background:var(--ink)}

/* tabs */
.tabs{display:flex;gap:4px;border-bottom:2px solid var(--line);margin-bottom:18px;flex-wrap:wrap}
.tab{border:0;background:transparent;padding:10px 16px;font-weight:600;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px}
.tab:hover{color:var(--ink)} .tab.active{color:var(--indigo);border-bottom-color:var(--indigo)}

/* login */
.login{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#1e1b39,#4338ca)}
.login-card{background:#fff;border-radius:16px;box-shadow:var(--shadow-l);width:400px;max-width:92vw;padding:32px}
.login-card .logo{width:54px;height:54px;border-radius:12px;background:var(--indigo);color:#fff;display:grid;place-items:center;font-weight:800;font-size:24px;margin:0 auto 14px}
.login-card h1{text-align:center;font-size:22px} .login-card p.sub{text-align:center;color:var(--muted);margin:4px 0 22px}
.login-card .field{margin-bottom:14px} .login-card .btn{width:100%;padding:11px}
.seg{display:flex;background:var(--bg);border-radius:10px;padding:4px;margin-bottom:18px}
.seg button{flex:1;border:0;background:transparent;padding:8px;border-radius:7px;font-weight:600;color:var(--muted);cursor:pointer}
.seg button.active{background:#fff;color:var(--indigo);box-shadow:var(--shadow)}

/* misc */
.bars{display:flex;flex-direction:column;gap:8px}
.bar-row{display:grid;grid-template-columns:130px 1fr 60px;align-items:center;gap:10px;font-size:13px}
.bar{height:10px;background:var(--indigo-l);border-radius:6px;overflow:hidden} .bar > span{display:block;height:100%;background:var(--indigo)}
.spark{display:flex;align-items:flex-end;gap:3px;height:90px}
.spark .col{flex:1;background:var(--indigo);border-radius:3px 3px 0 0;min-height:2px;opacity:.85}
.list-clean{list-style:none;margin:0;padding:0} .list-clean li{padding:9px 0;border-bottom:1px solid #f1f2f7;font-size:13px;display:flex;justify-content:space-between}
.loading{padding:50px;text-align:center;color:var(--muted)}
@media(max-width:880px){.app{grid-template-columns:1fr}.sidebar{position:fixed;left:-260px;z-index:60;transition:.2s;width:248px}.sidebar.open{left:0}.search{display:none}}