:root{--bg:#0b1220;--panel:#111a2e;--text:#e6edf7;--muted:#9fb0c7;--border:rgba(255,255,255,.08);--shadow:0 10px 30px rgba(0,0,0,.35);--brand1:#6d5efc;--brand2:#1ec8ff;--good:#22c55e;--warn:#f59e0b;--bad:#ef4444}
[data-theme="light"]{--bg:#f6f8fb;--panel:#fff;--text:#0b1220;--muted:#4b5b72;--border:rgba(12,18,32,.12);--shadow:0 10px 30px rgba(12,18,32,.12)}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;background:radial-gradient(1200px 800px at 10% 10%, rgba(109,94,252,.25), transparent 55%),radial-gradient(900px 700px at 90% 0%, rgba(30,200,255,.18), transparent 55%),var(--bg);color:var(--text)}
a{color:inherit}.container{max-width:1200px;margin:0 auto;padding:18px}.topbar{position:sticky;top:0;z-index:10;background:rgba(10,16,28,.75);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}[data-theme="light"] .topbar{background:rgba(246,248,251,.85)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}.badge{padding:3px 10px;border-radius:999px;background:linear-gradient(135deg,var(--brand1),var(--brand2));color:#fff;font-size:12px}
.nav{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between}.navlinks{display:flex;flex-wrap:wrap;gap:8px}
.navlinks a{padding:8px 10px;border-radius:10px;text-decoration:none;border:1px solid transparent;color:var(--muted)}
.navlinks a.active,.navlinks a:hover{background:rgba(255,255,255,.06);border-color:var(--border);color:var(--text)}
.card{background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:16px}[data-theme="light"] .card{background:var(--panel)}
.h1{font-size:24px;margin:4px 0 10px}.h2{font-size:18px;margin:18px 0 10px}.muted{color:var(--muted)}
.table{width:100%;border-collapse:collapse}.table th,.table td{padding:10px;border-bottom:1px solid var(--border);vertical-align:top}.table th{text-align:left;color:var(--muted);font-weight:600}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:9px 12px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.06);color:var(--text);text-decoration:none;cursor:pointer}
.btn.primary{background:linear-gradient(135deg,var(--brand1),var(--brand2));color:#fff;border-color:transparent}
.btn.bad{background:rgba(239,68,68,.15);border-color:rgba(239,68,68,.35)}
.btn.secondary{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.18);color:var(--text)}
.btn.secondary:hover{background:rgba(255,255,255,.2)}
[data-theme="light"] .btn.secondary{background:#e8ecf2;border-color:#c8d0db;color:#1a2640}
[data-theme="light"] .btn.secondary:hover{background:#d8dfe9}
.btn.edit{background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;border-color:transparent}
.btn.edit:hover{background:linear-gradient(135deg,#1d4ed8,#2563eb)}
.btn.back{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.22);color:var(--text);font-weight:600}
.btn.back:hover{background:rgba(255,255,255,.18)}
[data-theme="light"] .btn.back{background:#e8ecf2;border-color:#b0bbc9;color:#1a2640}
[data-theme="light"] .btn.back:hover{background:#d8dfe9}
.btn.small{padding:6px 10px;border-radius:10px;font-size:13px}
input,select,textarea{width:100%;padding:10px 12px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text)}[data-theme="light"] input,[data-theme="light"] select,[data-theme="light"] textarea{background:#fff}
label{display:block;font-size:13px;color:var(--muted);margin:10px 0 6px}.row{display:flex;gap:12px}.row>*{flex:1}
.notice{border:1px solid var(--border);border-left:4px solid var(--brand2);padding:10px 12px;border-radius:14px;background:rgba(255,255,255,.04)}.notice.bad{border-left-color:var(--bad)}.notice.good{border-left-color:var(--good)}
.footer{padding:18px 0;color:var(--muted);font-size:13px}
.kbd{font-family:ui-monospace,Menlo,Monaco,Consolas,monospace;font-size:12px;padding:2px 6px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.05)}


/* Teachers module extras */
.checkbox-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;margin:8px 0 4px}
.chk{display:flex;gap:10px;align-items:center;padding:10px;border:1px solid var(--border);border-radius:12px;background:rgba(255,255,255,.02)}
.chk input{transform:scale(1.05)}
.hint{font-size:12px;color:var(--muted);margin-top:6px}
.num{text-align:right;white-space:nowrap}


/* === Calendar raster (10-minute grid) === */
.cal-wrap{overflow:auto}
.cal{display:grid;grid-template-columns:70px repeat(7,1fr);min-width:980px;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:var(--panel);box-shadow:var(--shadow)}
.cal .cal-h{position:sticky;top:0;z-index:5;background:linear-gradient(90deg,rgba(255,255,255,.02),rgba(255,255,255,0));backdrop-filter:blur(6px)}
.cal .cal-h,.cal .cal-row{display:contents}
.cal .hcell{padding:12px 10px;border-bottom:1px solid var(--border);font-weight:700;color:var(--text)}
.cal .hcell.time{background:rgba(255,255,255,.02)}
.cal .tcell{padding:6px 10px;border-bottom:1px solid var(--border);font-size:12px;color:var(--muted);background:rgba(255,255,255,.02)}
.cal .dcell{position:relative;border-bottom:1px solid var(--border);border-left:1px solid var(--border);background:
  repeating-linear-gradient(to bottom, rgba(255,255,255,.06) 0 1px, transparent 1px 18px);
}
[data-theme="light"] .cal .dcell{background:
  repeating-linear-gradient(to bottom, rgba(12,18,32,.12) 0 1px, transparent 1px 18px);
}
.lesson-card{position:absolute;left:8px;right:8px;border-radius:12px;padding:8px 10px;border:1px solid rgba(255,255,255,.12);
  background:linear-gradient(135deg, rgba(109,94,252,.22), rgba(30,200,255,.10));
  box-shadow:0 10px 24px rgba(0,0,0,.22);cursor:pointer}
.lesson-card .tt{font-weight:800;font-size:12px;letter-spacing:.2px}
.lesson-card .sub{font-size:12px;color:var(--muted);margin-top:2px}
.lesson-card.conflict{border-color:rgba(239,68,68,.85);box-shadow:0 0 0 2px rgba(239,68,68,.22), 0 10px 24px rgba(0,0,0,.22)}
.lesson-card .badge{display:inline-flex;align-items:center;gap:6px;margin-top:6px;font-size:11px;color:var(--muted)}
.lesson-card .badge b{color:var(--warn)}
/* modal */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;z-index:50}
.modal{width:min(560px,92vw);background:var(--panel);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow);padding:16px}
.modal .h1{margin:0 0 8px 0}
.modal .grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.modal .actions{display:flex;justify-content:flex-end;gap:10px;margin-top:14px}