:root {
    --green: #2f6a43;
    --green-dark: #245034;
    --green-light: #e6f2e6;
    --bg: #f6fbf3;
    --card: #ffffff;
    --ink: #1d2b22;
    --muted: #6b7a6e;
    --line: #dbe6dc;
    --gold: #d99a2b;
    --danger: #b23a3a;
    --ok: #2e7d4f;
    --radius: 16px;
    --shadow: 0 6px 24px rgba(31, 66, 45, .08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: "Segoe UI", Tahoma, "Noto Kufi Arabic", system-ui, sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.7;
    font-size: 16px;
}
body.loading { cursor: progress; }
body.loading::after {
    content: ""; position: fixed; inset: 0; background: rgba(255,255,255,.35); z-index: 60;
}

a { color: var(--green); text-decoration: none; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: .82rem; }
.ok-text { color: var(--ok); font-weight: 700; }
.bad-text { color: var(--danger); font-weight: 700; }

.app { min-height: 100vh; padding-bottom: 72px; }

/* Topbar */
.topbar {
    position: sticky; top: 0; z-index: 40;
    display: flex; align-items: center; gap: 12px;
    padding: 10px 16px; background: var(--green); color: #fff;
    box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 10px; flex: 1; }
.brand-logo { font-size: 1.6rem; }
.brand-title { font-weight: 800; font-size: 1.05rem; }
.brand-sub { font-size: .75rem; opacity: .85; }
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
    background: rgba(255,255,255,.15); color: #fff; border: 0; border-radius: 10px;
    font-size: 1.2rem; width: 42px; height: 42px; cursor: pointer;
}
.icon-btn:hover { background: rgba(255,255,255,.28); }
.chip { background: rgba(255,255,255,.2); padding: 4px 12px; border-radius: 20px; font-size: .85rem; }

/* Sidenav */
.sidenav {
    position: fixed; top: 0; right: 0; bottom: 0; width: 280px; z-index: 50;
    background: #fff; box-shadow: var(--shadow); padding: 18px;
    animation: slideIn .18s ease;
}
@keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }
.sidenav-head { border-bottom: 1px solid var(--line); padding-bottom: 10px; margin-bottom: 10px; }
.sidenav-head strong { display: block; }
.sidenav ul { list-style: none; padding: 0; margin: 0; }
.sidenav li a {
    display: block; padding: 12px 14px; border-radius: 12px; color: var(--ink);
    font-weight: 600; margin-bottom: 4px;
}
.sidenav li a:hover, .sidenav li a.active { background: var(--green-light); color: var(--green-dark); }
.sidenav-foot { position: absolute; bottom: 16px; right: 18px; left: 18px; font-size: .8rem; }
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 45; }

/* Tabs (bottom on mobile) */
.tabbar { position: fixed; bottom: 0; right: 0; left: 0; z-index: 40; display: none;
    background: #fff; border-top: 1px solid var(--line); box-shadow: 0 -4px 16px rgba(0,0,0,.05); }
.tabbar a { flex: 1; text-align: center; padding: 10px 4px; color: var(--muted); font-size: .8rem; font-weight: 700; }
.tabbar a.active { color: var(--green); }

/* View */
.view { max-width: 1000px; margin: 0 auto; padding: 20px 16px 40px; }
.view h2 { margin-top: 4px; }
.view h3 { margin-top: 22px; }

/* Cards & grid */
.card {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 18px; margin-bottom: 14px; box-shadow: var(--shadow);
}
.card.error { border-color: var(--danger); color: var(--danger); }
.grid.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
.hero { text-align: center; padding: 22px 10px; }
.hero h1 { font-size: 1.9rem; margin: 0 0 8px; color: var(--green-dark); }
.hero-features { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 14px; }
.hero-features span { background: #fff; border: 1px solid var(--line); padding: 8px 14px; border-radius: 30px; font-size: .9rem; box-shadow: var(--shadow); }
.auth-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

label { display: block; margin: 10px 0; font-weight: 600; font-size: .92rem; }
input, select, textarea {
    width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px;
    font: inherit; margin-top: 6px; background: #fff;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--green); border-color: transparent; }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    background: #fff; color: var(--green-dark); border: 1.5px solid var(--green);
    padding: 11px 18px; border-radius: 12px; font: inherit; font-weight: 700;
    cursor: pointer; transition: .15s; text-decoration: none;
}
.btn:hover { background: var(--green-light); }
.btn.primary { background: var(--green); color: #fff; border-color: var(--green); }
.btn.primary:hover { background: var(--green-dark); }
.btn.ghost { border-color: var(--line); color: var(--muted); }
.btn.small { padding: 7px 12px; font-size: .85rem; border-radius: 10px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.subject-card, .game-card {
    display: flex; flex-direction: column; align-items: flex-start; gap: 6px;
    background: #fff; border: 1px solid var(--line); border-right: 6px solid var(--c, var(--green));
    border-radius: var(--radius); padding: 16px; cursor: pointer; text-align: right;
    font: inherit; box-shadow: var(--shadow); transition: .15s;
}
.subject-card:hover, .game-card:hover { transform: translateY(-3px); }
.subject-ic, .game-ic { font-size: 1.8rem; }

.lesson-list { list-style: none; padding: 0; }
.lesson-item {
    display: flex; align-items: center; gap: 12px; padding: 12px 14px; background: #fff;
    border: 1px solid var(--line); border-radius: 12px; margin-bottom: 8px; color: var(--ink);
}
.lesson-item:hover { background: var(--green-light); }
.lesson-no { background: var(--green); color: #fff; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font-size: .85rem; }
.lesson-title { flex: 1; font-weight: 700; }

.crumbs { font-size: .85rem; color: var(--muted); margin-bottom: 8px; }
.lesson-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; }
.action-row, .ex-actions, .ask-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.ask-row input { flex: 1; min-width: 180px; }
.action-row { margin: 14px 0; }

.points { list-style: none; padding: 0; }
.pt {
    background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px;
    margin-bottom: 8px; display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline;
}
.pt-heading { background: var(--green-light); font-weight: 800; }
.pt-definition { border-right: 4px solid var(--green); }
.pt-note { border-right: 4px solid var(--gold); }
.pt-example { border-right: 4px solid #2b5f8a; }
.pt-vocab { border-right: 4px solid #8a5a2b; }
.pt.rec { background: #fff8e8; }
.page-tag { margin-inline-start: auto; font-size: .75rem; color: var(--muted); background: var(--bg); padding: 2px 8px; border-radius: 8px; }

.teacher-out { background: var(--green-light); border-radius: 14px; padding: 14px 16px; margin: 12px 0; border: 1px solid #cfe3d0; }
.badge { font-size: .72rem; background: var(--green); color: #fff; padding: 2px 8px; border-radius: 8px; }
.badge.ai { background: var(--gold); }
.badge.draft { background: #999; }
.badge.review { background: var(--gold); }
.badge.published { background: var(--green); }

.exercise .ex-q { font-weight: 700; margin-bottom: 10px; }
.opts { display: grid; gap: 8px; margin-bottom: 10px; }
.opt { display: flex; align-items: center; gap: 10px; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; cursor: pointer; margin: 0; }
.opt input { width: auto; margin: 0; }
.ex-input { margin-bottom: 10px; }
.ex-feedback { margin-top: 10px; font-weight: 600; }
.ex-feedback.ok { color: var(--ok); }
.ex-feedback.bad { color: var(--danger); }
.ex-feedback.hint { color: var(--gold); }
.ex-feedback.steps ol { margin: 6px 0; padding-inline-start: 22px; }

.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 12px; margin: 14px 0; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px; text-align: center; box-shadow: var(--shadow); }
.stat b { display: block; font-size: 1.5rem; color: var(--green-dark); }
.stat span { font-size: .8rem; color: var(--muted); }

.progress-list .progress-item { display: grid; grid-template-columns: 1fr 120px 90px; gap: 10px; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--line); }
.bar { background: var(--line); height: 10px; border-radius: 10px; overflow: hidden; }
.bar > div { height: 100%; background: var(--green); }

.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th, .table td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: right; }
.table select { padding: 6px; }

.modal-wrap { position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 70; display: grid; place-items: center; padding: 16px; }
.modal { background: #fff; border-radius: 18px; padding: 22px; max-width: 520px; width: 100%; box-shadow: var(--shadow); }
.modal:has(.page-viewer) { max-width: 860px; }
.page-viewer { display: flex; align-items: center; gap: 8px; margin: 12px 0; }
.page-frame { flex: 1; display: grid; place-items: center; min-height: 240px; background: var(--bg); border-radius: 12px; padding: 8px; }
.page-img { max-width: 100%; max-height: 70vh; border-radius: 8px; box-shadow: var(--shadow); }
.action-row.center { justify-content: center; }
.play-q { font-size: 1.2rem; font-weight: 800; margin: 12px 0; }
.play-opts { display: grid; gap: 10px; }
.big-score { font-size: 2rem; font-weight: 800; color: var(--green); text-align: center; }

.toast {
    position: fixed; bottom: 84px; left: 50%; transform: translateX(-50%);
    background: var(--green-dark); color: #fff; padding: 12px 20px; border-radius: 12px;
    z-index: 90; box-shadow: var(--shadow); max-width: 90%;
}
.toast.error { background: var(--danger); }

.warn { background: #fff3cd; border: 1px solid var(--gold); padding: 10px 12px; border-radius: 10px; margin-top: 10px; font-size: .9rem; }
.switch { display: flex; align-items: center; gap: 10px; }
.switch input { width: auto; }
.summary-draft { background: var(--green-light); }
.ai-title { font-weight: 700; color: var(--green); margin-bottom: 4px; }
.suggestion { border: 1px solid var(--line); border-radius: 10px; padding: 10px; margin: 8px 0; }
.suggestion .s-answer, .suggestion .s-hint { display: block; width: 100%; margin: 6px 0; padding: 8px; border: 1px solid var(--line); border-radius: 8px; }
.badge.raw { background: #999; }
.badge.extracted { background: var(--gold); }
.badge.reviewed { background: var(--green); }
.page-review { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 12px; }
.page-row { background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.page-head { font-weight: 700; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.page-text { width: 100%; font-family: inherit; font-size: .9rem; border-radius: 10px; border: 1px solid var(--line); padding: 10px; margin-bottom: 8px; }

/* AI agents dashboard */
.agents-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.agent-card { border: 1px solid var(--line); border-radius: 12px; padding: 14px; background: var(--bg); display: flex; flex-direction: column; gap: 6px; }
.agent-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.agent-card .small { font-size: .78rem; }
.agent-run { display: flex; gap: 8px; margin-top: auto; }
.agent-run select, .agent-run input { flex: 1; min-width: 0; }

/* Desktop */
@media (min-width: 900px) {
    .tabbar { display: none !important; }
    #menuBtn { display: none; }
    .sidenav { transform: none; box-shadow: none; border-left: 1px solid var(--line); top: 62px; }
    .sidenav.hidden { display: block !important; }
    .app { padding-right: 280px; padding-bottom: 0; }
    .view { padding: 24px 40px 60px; }
}
@media (max-width: 899px) {
    .sidenav { transform: translateX(100%); }
    .sidenav:not(.hidden) { transform: translateX(0); }
    .tabbar { display: flex; }
    .auth-grid { grid-template-columns: 1fr; }
    .progress-list .progress-item { grid-template-columns: 1fr; }
}

/* Boot / connection states */
.boot { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; padding: 80px 20px; color: var(--muted); text-align: center; }
.boot-spinner { width: 42px; height: 42px; border-radius: 50%; border: 4px solid var(--line); border-top-color: var(--green); animation: bootspin .9s linear infinite; }
@keyframes bootspin { to { transform: rotate(360deg); } }
.offline-card { max-width: 520px; margin: 40px auto; text-align: center; }
.offline-card .btn { margin-top: 10px; }

/* Curriculum self-test (اختبر معلوماتك) */
.quiz-filters { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; }
.quiz-filters label { flex: 1 1 180px; margin: 0; }
.quiz-filters .btn { flex: 0 0 auto; }
.quiz-head { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 16px 0; }
.quiz-score { margin-inline-start: auto; font-weight: 800; color: var(--green-dark); }
.quiz-q { margin-bottom: 14px; }
.opt-btn { width: 100%; text-align: start; justify-content: flex-start; }
.opt-btn.correct { background: var(--green-light); border-color: var(--green); color: var(--green-dark); font-weight: 800; }
.opt-btn.wrong { background: #fdecec; border-color: var(--danger); color: var(--danger); font-weight: 800; }
.quiz-fb { margin-top: 10px; font-weight: 700; }
.quiz-fb.ok { color: var(--ok); }
.quiz-fb.bad { color: var(--danger); }
.quiz-evidence { margin-top: 6px; font-weight: 500; color: var(--muted); background: var(--bg); border-inline-start: 3px solid var(--green); border-radius: 8px; padding: 8px 12px; }