/* TeacherHub Smart — portal shell (teacher / student) — RTL */
:root{
  --bg:#f4f6fb; --card:#ffffff; --ink:#1c2434; --muted:#6b7590;
  --brand:#2f6df6; --brand-dark:#1c4fd1; --green:#14a06b; --red:#e0483c;
  --amber:#e2971a; --line:#e5e9f2; --radius:14px; --shadow:0 2px 10px rgba(24,39,75,.06);
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Segoe UI",Tahoma,"Cairo",system-ui,-apple-system,sans-serif;font-size:14.5px}

header.topbar{background:linear-gradient(90deg,var(--brand),#6a3ff5);color:#fff;
  padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700}
.brand small{display:block;font-weight:400;font-size:11.5px;opacity:.85}
.logo{width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.2);
  display:grid;place-items:center;font-size:17px}
.who{display:flex;align-items:center;gap:10px;font-size:13px}
.who .pill{background:rgba(255,255,255,.2);padding:5px 11px;border-radius:999px;font-weight:700}
.who button{border:0;background:rgba(255,255,255,.16);color:#fff;padding:6px 11px;
  border-radius:9px;cursor:pointer;font-weight:600;font-size:12.5px;font-family:inherit}
.who button:hover{background:rgba(255,255,255,.3)}

.layout{display:grid;grid-template-columns:215px 1fr;gap:0;align-items:start}
aside.side{background:var(--card);border-inline-end:1px solid var(--line);min-height:calc(100vh - 58px);padding:12px 10px}
aside.side button{display:flex;gap:9px;align-items:center;width:100%;border:0;background:transparent;
  color:var(--muted);padding:9px 11px;border-radius:10px;cursor:pointer;font-size:13.8px;
  font-weight:600;text-align:start;font-family:inherit;margin-bottom:2px}
aside.side button:hover{background:#eef2fb;color:var(--ink)}
aside.side button.active{background:var(--brand);color:#fff}
main{padding:18px 22px 60px;max-width:1180px}
.page{display:none}
.page.active{display:block;animation:fade .18s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1}}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:16px;margin-bottom:16px}
.card h3{margin:0 0 12px;font-size:16px}
.grid{display:grid;gap:14px}
.g4{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}

.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 16px;box-shadow:var(--shadow)}
.stat .label{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.4px}
.stat .value{font-size:25px;font-weight:700;margin-top:4px}
.stat .sub{font-size:11.5px;color:var(--muted);margin-top:3px}
.stat.green .value{color:var(--green)}
.stat.red .value{color:var(--red)}
.stat.blue .value{color:var(--brand)}
.stat.amber .value{color:var(--amber)}

table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{padding:9px 10px;text-align:right;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-size:12px;text-transform:uppercase;background:#fafbff}
tbody tr:hover{background:#f8faff}
.table-wrap{overflow-x:auto}

.badge{padding:3px 9px;border-radius:999px;font-size:11.5px;font-weight:700;white-space:nowrap}
.b-confirmed,.b-present,.b-paid,.b-completed{background:#e2f6ee;color:var(--green)}
.b-cancelled,.b-absent,.b-unpaid,.b-reversed{background:#fdeceb;color:var(--red)}
.b-pending,.b-accrued,.b-partial,.b-request_submitted,.b-awaiting_review{background:#fdf3e0;color:var(--amber)}
.b-info,.b-muted,.b-rescheduled{background:#eef2fb;color:var(--muted)}
.b-no_show,.b-disputed{background:#fdeceb;color:var(--red)}

.row{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end;margin-bottom:12px}
.field{display:flex;flex-direction:column;gap:4px}
.field label{font-size:12px;color:var(--muted);font-weight:600}
input,select,textarea{padding:8px 10px;border:1px solid var(--line);border-radius:9px;font-size:14px;
  font-family:inherit;background:#fff;color:var(--ink);min-width:130px}
input:focus,select:focus,textarea:focus{outline:2px solid #cfdcff;border-color:var(--brand)}
button.btn{border:0;border-radius:9px;padding:9px 15px;cursor:pointer;font-weight:600;
  font-size:13.5px;background:var(--brand);color:#fff;font-family:inherit}
button.btn:hover{background:var(--brand-dark)}
button.btn.ghost{background:#eef2fb;color:var(--ink)}
button.btn.danger{background:var(--red)}
button.btn.sm{padding:5px 10px;font-size:12.5px}
.empty{text-align:center;color:var(--muted);padding:26px;font-size:14px}
.hint{font-size:12.5px;color:var(--muted);margin:6px 0 0;line-height:1.8}

.note-item{border:1px solid var(--line);border-radius:12px;padding:11px 13px;margin-bottom:9px;background:#fbfcff}
.note-item.unread{border-color:#c3d4ff;background:#f4f8ff}
.note-item .t{font-weight:700;font-size:13.5px}
.note-item .b{font-size:13px;color:var(--muted);margin-top:2px}
.note-item .d{font-size:11.5px;color:var(--muted);margin-top:4px}

.day{border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-bottom:9px;background:#fff}
.day.today{border-color:var(--brand);background:#f5f9ff}
.day h4{margin:0 0 7px;font-size:13.5px}
.lesson-row{display:flex;justify-content:space-between;gap:10px;align-items:center;
  padding:7px 0;border-top:1px dashed var(--line);flex-wrap:wrap}

#toast{position:fixed;bottom:20px;inset-inline-end:20px;z-index:90;background:var(--ink);color:#fff;
  padding:11px 16px;border-radius:10px;opacity:0;transform:translateY(8px);transition:.22s;
  pointer-events:none;max-width:340px}
#toast.show{opacity:1;transform:none}
#toast.err{background:var(--red)}
#toast.ok{background:var(--green)}

.modal-back{position:fixed;inset:0;background:rgba(20,28,48,.45);display:none;place-items:center;z-index:60;padding:16px}
.modal-back.show{display:grid}
.modal{background:#fff;border-radius:16px;padding:20px;width:min(560px,100%);max-height:88vh;overflow:auto}
.modal h3{margin:0 0 14px}
.modal .grid{grid-template-columns:1fr 1fr}
.modal .full{grid-column:1/-1}
.modal input,.modal select,.modal textarea{width:100%}

@media (max-width:820px){
  .layout{grid-template-columns:1fr}
  aside.side{display:flex;overflow-x:auto;min-height:auto;border-inline-end:0;border-bottom:1px solid var(--line)}
  aside.side button{width:auto;white-space:nowrap;margin-bottom:0}
}