:root {
  --accent:#2f6f4f; --accent-dark:#245740; --bg:#faf9f6; --card:#fff;
  --text:#222; --muted:#777; --danger:#b3452c; --line:#e5e2da;
  --chip:#eef0ee; --chip-active:#2f6f4f;
}
* { box-sizing: border-box; }
body { margin:0; font-family:-apple-system,Segoe UI,Roboto,sans-serif; background:var(--bg); color:var(--text); line-height:1.5; }

/* ---------- NAV ---------- */
nav { display:flex; align-items:center; justify-content:space-between; gap:.5rem; padding:.6rem 1rem; background:var(--card); border-bottom:1px solid var(--line); position:sticky; top:0; z-index:30; }
.nav-links { display:flex; align-items:center; gap:.2rem; }
.nav-links a { color:var(--accent); text-decoration:none; font-size:.95rem; padding:.45rem .7rem; border-radius:8px; }
.nav-links a:hover { background:#eef4f0; }
.nav-user { display:flex; align-items:center; gap:.5rem; position:relative; }
.nav-username { font-size:.85rem; color:var(--muted); }
.link-btn { background:none; border:none; color:var(--accent); cursor:pointer; font-size:.9rem; padding:.45rem .6rem; }
.inline-form { display:inline; }
.hamburger { display:none; background:none; border:none; font-size:1.5rem; cursor:pointer; color:var(--text); padding:.2rem .5rem; min-height:auto; }

.lang-switch { position:relative; }
.lang-switch summary { list-style:none; cursor:pointer; background:#eef4f0; color:var(--accent); padding:.45rem .9rem; border-radius:20px; font-size:.85rem; }
.lang-switch summary::-webkit-details-marker { display:none; }
.lang-menu { position:absolute; right:0; top:115%; background:var(--card); border:1px solid var(--line); border-radius:12px; padding:.4rem; min-width:170px; box-shadow:0 6px 20px rgba(0,0,0,.12); z-index:40; }
.lang-option { display:block; width:100%; text-align:left; background:none; border:none; padding:.55rem .7rem; font-size:.9rem; cursor:pointer; border-radius:8px; min-height:auto; color:var(--text); }
.lang-option:hover { background:#eef4f0; }
.lang-divider { font-size:.7rem; color:var(--muted); padding:.5rem .7rem .2rem; text-transform:uppercase; letter-spacing:.03em; }

@media (max-width:640px) {
  .hamburger { display:block; }
  .nav-links { display:none; position:absolute; top:100%; left:0; right:0; flex-direction:column; align-items:stretch; background:var(--card); border-bottom:1px solid var(--line); padding:.5rem; gap:.1rem; box-shadow:0 6px 20px rgba(0,0,0,.08); }
  .nav-links.open { display:flex; }
  .nav-links a { padding:.7rem .8rem; }
}

main { max-width:660px; margin:0 auto; padding:1rem; }
.messages { list-style:none; padding:0; }
.messages li { background:#eef4f0; padding:.6rem 1rem; border-radius:10px; margin-bottom:.5rem; }

/* ---------- FILTER BAR ---------- */
.filters { display:flex; flex-direction:column; gap:.6rem; margin-bottom:1rem; }
.cat-grid { display:grid; grid-template-columns:1fr 1fr; gap:.5rem; }
.filter-row { display:flex; flex-wrap:wrap; gap:.4rem; align-items:center; }

.seg { display:inline-flex; background:var(--chip); border-radius:22px; padding:.2rem; gap:.15rem; }
.seg a { font-size:.85rem; padding:.35rem .8rem; border-radius:18px; text-decoration:none; color:var(--text); }
.seg a.active { background:var(--accent); color:#fff; }

.toggle-btn { font-size:.85rem; padding:.45rem 1rem; border-radius:20px; text-decoration:none; border:1px solid var(--line); min-height:auto; display:inline-flex; align-items:center; gap:.4rem; }
.toggle-one { background:#eef4f0; color:var(--accent); }
.toggle-prod { background:#f6e6c9; color:#8a6d2f; }

.toggle-both { background:var(--accent); color:#fff; border-color:var(--accent); }

/* collapsible chip groups */
.chipgroup { border:1px solid var(--line); border-radius:12px; background:var(--card); overflow:hidden; }
.chipgroup > summary { list-style:none; cursor:pointer; padding:.4rem .7rem; font-size:.82rem; display:flex; justify-content:space-between; align-items:center; }.chipgroup > summary::-webkit-details-marker { display:none; }
.chipgroup > summary::after { content:"▾"; color:var(--muted); font-size:.8rem; }
.chipgroup[open] > summary::after { content:"▴"; }
.chipgroup .count { background:var(--accent); color:#fff; font-size:.7rem; border-radius:20px; padding:.05rem .5rem; margin-left:.4rem; }
.chip-wrap { display:flex; flex-wrap:wrap; gap:.35rem; padding:.2rem .7rem .8rem; }
.chip { font-size:.8rem; padding:.3rem .7rem; border-radius:20px; background:var(--chip); text-decoration:none; color:var(--text); }
.chip.on { background:var(--chip-active); color:#fff; }

.dropdown-label { font-size:.8rem; color:var(--muted); }

/* ---------- CARD ---------- */
.due { font-size:.85rem; color:var(--muted); margin:.2rem 0 1rem; }
.card-box { background:var(--card); border-radius:18px; padding:2rem 1.5rem; box-shadow:0 2px 14px rgba(0,0,0,.05); text-align:center; margin:1rem 0; position:relative; }
.headword { font-size:2.2rem; margin:.5rem 0; word-break:break-word; }
.arabic-font { font-family:'Noto Naskh Arabic','Geeza Pro',Arial,sans-serif; }
.reveal-item .arabic-font,
.answer-details .arabic-font,
details .arabic-font { font-size:1.4em; line-height:1.8; }
details > summary { cursor:pointer; color:var(--accent); font-weight:500; }

button, .btn { font-size:1rem; padding:.7rem 1.1rem; border-radius:12px; border:none; cursor:pointer; min-height:44px; }
.grade-row { display:flex; gap:.5rem; flex-wrap:wrap; justify-content:center; margin-top:1.2rem; }
.hidden-until-answered { display:none; }
.grade-row button { flex:1; min-width:70px; font-weight:500; }
.grade-row button[value="0"] { background:#f3d9d0; }
.grade-row button[value="1"] { background:#f6e6c9; }
.grade-row button[value="2"] { background:#d9ecdf; }
.grade-row button[value="3"] { background:#c9e6d6; }

#edit-toggle { position:absolute; top:.6rem; right:.6rem; background:none; border:none; opacity:.15; cursor:pointer; min-height:auto; padding:.2rem; font-size:1.1rem; transition:opacity .15s; }
#edit-toggle:hover { opacity:.6; }

/* ---------- TABLE / FORMS ---------- */
table { width:100%; border-collapse:collapse; font-size:.9rem; }
th, td { text-align:left; padding:.55rem; border-bottom:1px solid #eee; }
.badge { font-size:.7rem; padding:.15rem .5rem; border-radius:20px; margin-left:.3rem; }
.badge-leech { background:#f3d9d0; color:var(--danger); }
.badge-suspended { background:#eee; color:var(--muted); }

.stat-grid { display:grid; grid-template-columns:1fr 1fr; gap:.75rem; }
.stat-box { background:var(--card); border-radius:14px; padding:1.2rem; text-align:center; box-shadow:0 1px 6px rgba(0,0,0,.04); }
.stat-box .num { font-size:1.8rem; font-weight:700; color:var(--accent); }

form p { margin:.6rem 0; }
label { display:block; font-size:.9rem; margin-bottom:.25rem; }
.required-mark { color:var(--danger); }
input[type=text], textarea, select { width:100%; padding:.65rem; border-radius:10px; border:1px solid #ccc; font-size:1rem; }
input[type=text]:focus, textarea:focus, select:focus { outline:none; border-color:var(--accent); }

.edit-actions { display:flex; align-items:center; gap:.4rem; margin-top:.6rem; }
.btn-sm { font-size:.85rem; padding:.4rem .8rem; min-height:auto; border-radius:8px; }
.btn-grey { background:#eee; }
.btn-danger { background:#f3d9d0; color:var(--danger); }
.edit-link { font-size:.8rem; color:var(--accent); }
.edit-input { padding:.4rem .55rem; font-size:.9rem; }
.reveal-hidden { display:none; }
.reveal-more { background:#eef4f0; color:var(--accent); margin-top:.4rem; }

/* --- teacher table: content-first --- */
.tt { width:100%; border-collapse:separate; border-spacing:0 .3rem; font-size:.9rem; }
.tt thead th { font-size:.7rem; text-transform:uppercase; letter-spacing:.04em; color:var(--muted); padding:.2rem .4rem; font-weight:500; }
.tt tbody tr.row-main td { background:var(--card); padding:.35rem .4rem; vertical-align:middle; }
.tt tbody tr.row-main td:first-child { border-radius:10px 0 0 10px; }
.tt tbody tr.row-main td:last-child { border-radius:0 10px 10px 0; }
.tt input.cell, .tt textarea.cell { width:100%; border:1px solid transparent; background:transparent; padding:.35rem .4rem; border-radius:6px; font-size:.95rem; font-family:inherit; resize:vertical; overflow:hidden; }
.tt input.cell:hover, .tt textarea.cell:hover { border-color:#e5e2da; }
.tt input.cell:focus, .tt textarea.cell:focus { border-color:var(--accent); background:#fff; outline:none; }
.tt textarea.cell { line-height:1.4; min-height:1.8rem; resize:none; display:block; }
.tt tbody tr.row-main td { vertical-align:top; }
.tt .cell-main { font-size:1.15rem; font-weight:500; }
.tt .cell-sub { font-size:.8rem; color:var(--muted); }
.tt .row-cats td { background:transparent; padding:0 .4rem .4rem; }
.tt .row-cats input.cell, .tt .row-cats textarea.cell { font-size:.85rem; background:transparent; }
.cats-grid { display:grid; grid-template-columns:1fr 1fr; gap:.3rem; }
@media (max-width:640px) {
  .tt tbody tr.row-main { display:flex; flex-direction:column; }
  .tt tbody tr.row-main > td.actions { order:99; }
}
.tt .actions { white-space:nowrap; text-align:right; }
.tt .actions button { padding:.3rem .55rem; font-size:.75rem; min-height:auto; }
.load-more { display:block; width:100%; margin:1rem 0; background:#eef4f0; color:var(--accent); text-align:center; text-decoration:none; padding:.7rem; border-radius:10px; }
.add-bar { background:var(--card); padding:.6rem; border-radius:12px; display:flex; gap:.3rem; flex-wrap:wrap; align-items:center; margin-bottom:.8rem; }
.add-bar input { flex:1; min-width:110px; }
@media (max-width:640px) {
  .tt thead { display:none; }
  .tt tbody tr.row-main { display:block; margin-bottom:.2rem; background:var(--card); border-radius:10px; padding:.4rem; }
  .tt tbody tr.row-main > td { display:none; border-radius:0; padding:.2rem; }
  .tt tbody tr.row-main > td:nth-of-type(1),
  .tt tbody tr.row-main > td:nth-of-type(2) { display:block; }
  .tt-examples tbody tr.row-main > td { display:block; }
  .tt tbody tr.row-main.open > td { display:block; }
.tt tr.row-cats { display:none; }
  .tt tr.row-cats.open { display:block; background:var(--card); border-radius:0 0 10px 10px; }
  .tt tr.row-cats.open > td { display:block; padding:.4rem; }
.tt tr.row-cats.open .cats-grid { display:grid; grid-template-columns:1fr 1fr; gap:.3rem; }
  .tt tr.row-cats.open textarea.cell { width:100%; min-width:0; }
  .tt-expand { display:inline-block !important; float:right; background:none; border:none; color:var(--muted); font-size:1.1rem; cursor:pointer; padding:.2rem .5rem; min-height:auto; }
}
.tt-expand { display:none; }

.searchbar { display:flex; gap:.4rem; margin-bottom:.8rem; }
.searchbar input { flex:1; padding:.55rem .8rem; border-radius:10px; border:1px solid var(--line); font-size:.95rem; }
.searchbar input:focus { outline:none; border-color:var(--accent); }

body.wide main { max-width:1400px; }
.grade-row .mc-choice, .mc-choice { flex:1 1 100% !important; min-width:0 !important; white-space:normal; overflow-wrap:break-word; word-break:normal; text-align:center; line-height:1.35; padding:.7rem .6rem; font-size:.95rem; color:var(--text); }
.card-box { overflow:hidden; }
.grade-row { max-width:100%; margin-left:0; margin-right:0; }

.import-hint {
    margin: -.4rem 0 1rem;
    font-size: .75rem;
    line-height: 1.5;
    color: var(--muted);
}
.import-hint code {
    background: #f2f1ed;
    border-radius: 4px;
    padding: .05rem .3rem;
    font-size: .72rem;
}