/* ═══════════════════════════════════════════════════════════════════
   saifhub.css — منصة الدكتور سيف الخروصي التعليمية
   طبقة التصميم الوحيدة للموقع: tokens الألوان (WCAG AA)، الطباعة العربية،
   وكل المكوّنات. لا اعتماد على أي إطار CSS خارجي.
   ═══════════════════════════════════════════════════════════════════ */

/* ── 1. Tokens ──────────────────────────────────────────────────── */
:root {
  color-scheme: light dark;

  --bg: #F4F7FB;            /* ورق بارد منخفض الإجهاد */
  --surface: #FFFFFF;
  --surface-2: #EAF0F6;
  --line: #D9E1EA;
  --line-strong: #AFBECE;

  --ink: #14212E;           /* 16:1 */
  --ink-2: #3E4C5E;         /* 8.7:1 */
  --ink-3: #47596E;         /* ≥7:1 على السطح — النص الثانوي كان باهتًا */

  --brand: #1B67AE;         /* الأزرق المحدَّث 5.8:1 */
  --brand-ink: #134C82;
  --brand-soft: #E4EEF8;

  --accent: #157A5B;        /* النعناعي المحدَّث 5.3:1 */
  --accent-soft: #DEF3EA;

  --warn: #A8480A;
  --warn-soft: #FBEEDC;

  --focus: #1B67AE;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(20,33,46,.06), 0 10px 28px -14px rgba(20,33,46,.16);

  /* لون المادة الحالية — تُعيَّن بـ body[data-subject] */
  --c-subject: var(--brand);
  --c-subject-soft: var(--brand-soft);

  /* ألوان المواد — للقوائم والبطاقات بغضّ النظر عن المادة الحالية */
  --c-arabic:  #1F5E93; --c-arabic-soft:  #E6EEF6;
  --c-islamic: #157A5B; --c-islamic-soft: #E1F3EC;
  --c-social:  #9A4A0A; --c-social-soft:  #F9ECDF;
  --c-moral:   #5B3FB5; --c-moral-soft:   #ECE8F8;
  --c-math:    #0E7490; --c-math-soft:    #E0F2F6;
  --c-science: #AD1F5F; --c-science-soft: #F8E5EE;
  --c-english: #4C6B1F; --c-english-soft: #EAF1DF;
  --c-drama:   #A32C3C; --c-drama-soft:   #FAE8EA;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F1720; --surface: #162130; --surface-2: #1D2A3B;
    --line: #26354A; --line-strong: #3A4C63;
    --ink: #E6EDF5; --ink-2: #B7C4D3; --ink-3: #8A9AAD;
    --brand: #6FB0EC; --brand-ink: #9CCBF5; --brand-soft: #1A3350;
    --accent: #4CC79A; --accent-soft: #16382C;
    --warn: #E5A56B; --warn-soft: #3B2A18;
    --focus: #9CCBF5;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 28px -14px rgba(0,0,0,.6);
    --c-arabic:  #7FB3E6; --c-arabic-soft:  #1A2E44;
    --c-islamic: #4CC79A; --c-islamic-soft: #16382C;
    --c-social:  #E5A56B; --c-social-soft:  #3B2A18;
    --c-moral:   #B39BF0; --c-moral-soft:   #2A2344;
    --c-math:    #5FC3DB; --c-math-soft:    #143540;
    --c-science: #F08BB6; --c-science-soft: #3E1E2E;
    --c-english: #A9C77A; --c-english-soft: #263318;
    --c-drama:   #F0919C; --c-drama-soft:   #3A1D22;
  }
}

body[data-subject="arabic"]  { --c-subject: var(--c-arabic);  --c-subject-soft: var(--c-arabic-soft); }
body[data-subject="islamic"] { --c-subject: var(--c-islamic); --c-subject-soft: var(--c-islamic-soft); }
body[data-subject="social"]  { --c-subject: var(--c-social);  --c-subject-soft: var(--c-social-soft); }
body[data-subject="moral"]   { --c-subject: var(--c-moral);   --c-subject-soft: var(--c-moral-soft); }
body[data-subject="math"]    { --c-subject: var(--c-math);    --c-subject-soft: var(--c-math-soft); }
body[data-subject="science"] { --c-subject: var(--c-science); --c-subject-soft: var(--c-science-soft); }
body[data-subject="english"] { --c-subject: var(--c-english); --c-subject-soft: var(--c-english-soft); }
body[data-subject="drama"]   { --c-subject: var(--c-drama);   --c-subject-soft: var(--c-drama-soft); }

/* ── 2. Base ────────────────────────────────────────────────────── */
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg); color: var(--ink);
  font-family: Tajawal, system-ui, sans-serif;
  font-size: 16px; line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh; display: flex; flex-direction: column;
}
main { flex: 1; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
::selection { background: var(--c-subject-soft); }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 99px; }
.sh-ic { width: 1em; height: 1em; display: inline-block; vertical-align: -0.125em; fill: currentColor; flex: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ── 3. Layout ──────────────────────────────────────────────────── */
.sh-wrap { max-width: 82rem; margin-inline: auto; padding-inline: 1.25rem; }
.sh-page { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 1024px) {
  .sh-page { grid-template-columns: 19rem minmax(0, 1fr); align-items: start; }
  .sh-side { position: sticky; top: 4.75rem; max-height: calc(100dvh - 5.5rem); overflow-y: auto; }
}

/* ── 4. Header ──────────────────────────────────────────────────── */
.sh-header { position: sticky; top: 0; z-index: 40; background: var(--surface); border-bottom: 1px solid var(--line); }
.sh-header .sh-wrap { display: flex; align-items: center; gap: .75rem 1.25rem; min-height: 4rem; flex-wrap: wrap; padding-block: .5rem; }
.sh-brand { display: flex; align-items: center; gap: .65rem; line-height: 1.2; }
.sh-header .sh-brandmenu { flex: none; }
.sh-header .sh-brandmenu-btn { width: 3.15rem; height: 3.15rem; padding: 2px; box-shadow: none; }
.sh-header .sh-brandmenu-list { top: 3.5rem; inset-inline-start: 0; inset-inline-end: auto; z-index: 60; }
@media (max-width: 400px) { .sh-header .sh-brand small { display: none; } }
.sh-brand-mark { width: 2.4rem; height: 2.4rem; border-radius: .7rem; background: var(--c-subject); color: #fff; display: grid; place-items: center; font-size: 1.05rem; flex: none; }
.sh-brand strong { display: block; font-size: 1rem; color: var(--ink); }
.sh-brand small { display: block; font-size: .72rem; color: var(--ink-3); margin-top: .1rem; }
.sh-nav { display: none; gap: .15rem; margin-inline-start: auto; }
.sh-nav a { padding: .45rem .7rem; border-radius: var(--radius-sm); font-size: .9rem; color: var(--ink-2); display: inline-flex; align-items: center; gap: .45rem; }
.sh-nav a i.dot { width: .5rem; height: .5rem; border-radius: 50%; background: var(--dot); flex: none; }
.sh-nav a:hover { background: var(--surface-2); color: var(--ink); }
.sh-nav a[aria-current="page"] { background: var(--c-subject-soft); color: var(--c-subject); font-weight: 700; }
@media (min-width: 1100px) { .sh-nav { display: flex; } .sh-nav-toggle { display: none !important; } }
.sh-nav-toggle { margin-inline-start: auto; width: 2.6rem; height: 2.6rem; border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--surface); display: grid; place-items: center; }
.sh-nav-panel { width: 100%; display: grid; grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr)); gap: .4rem; padding-block: .25rem .5rem; }
.sh-nav-panel a { padding: .55rem .75rem; border-radius: var(--radius-sm); background: var(--surface-2); font-size: .9rem; display: flex; align-items: center; gap: .5rem; }
.sh-nav-panel a i.dot { width: .5rem; height: .5rem; border-radius: 50%; background: var(--dot); }

/* البحث */
.sh-search { position: relative; flex: 1 1 14rem; max-width: 24rem; }
.sh-search input {
  width: 100%; background: var(--surface-2); border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: .55rem 2.4rem .55rem .9rem; font-size: .9rem; color: var(--ink);
}
.sh-search input:focus { background: var(--surface); border-color: var(--line-strong); outline: none; box-shadow: 0 0 0 3px var(--c-subject-soft); }
.sh-search > svg { position: absolute; inset-inline-start: .8rem; top: 50%; translate: 0 -50%; width: 1rem; height: 1rem; color: var(--ink-3); pointer-events: none; }
.sh-search-results {
  position: absolute; top: calc(100% + .4rem); inset-inline: 0; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; z-index: 50;
}
.sh-search-results a { display: grid; grid-template-columns: 1fr auto; gap: .5rem; padding: .6rem .9rem; border-top: 1px solid var(--line); font-size: .9rem; }
.sh-search-results a:first-child { border-top: 0; }
.sh-search-results a:hover, .sh-search-results a:focus { background: var(--surface-2); }
.sh-search-results a span { display: block; color: var(--ink-3); font-size: .75rem; }
.sh-search-results .kind { align-self: center; font-size: .72rem; color: var(--sc, var(--ink-3)); font-weight: 700; }
.sh-search-empty { padding: .9rem; color: var(--ink-3); font-size: .9rem; text-align: center; }

/* ── 5. الفتات ───────────────────────────────────────────────────── */
.sh-crumbs { font-size: .86rem; color: var(--ink-3); padding-block: .9rem .2rem; display: flex; flex-wrap: wrap; gap: .3rem .5rem; list-style: none; margin: 0; }
.sh-crumbs a:hover { color: var(--c-subject); }
.sh-crumbs li { display: inline; }
.sh-crumbs li + li::before { content: "›"; margin-inline-end: .5rem; color: var(--line-strong); }
.sh-crumbs [aria-current] { color: var(--ink); font-weight: 500; }

/* ── 6. Hero — الغلاف ─────────────────────────────────────────────── */
.sh-hero {
  position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem 1.5rem 1.4rem; display: grid; gap: 1.1rem; overflow: hidden;
}
/* كعب الكتاب: شريط بلون المادة على حافة البداية */
.sh-hero::before { content: ""; position: absolute; inset-block: 0; inset-inline-start: 0; width: .55rem; background: var(--c-subject); }
.sh-hero-head { display: flex; gap: 1rem; align-items: flex-start; }
.sh-hero-icon { width: 3.4rem; height: 3.4rem; border-radius: 1rem; background: var(--c-subject-soft); color: var(--c-subject); display: grid; place-items: center; font-size: 1.4rem; flex: none; }
.sh-hero h1 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); font-weight: 700; line-height: 1.25; margin: 0; }
.sh-hero .tagline { color: var(--ink-2); margin-top: .25rem; }
.sh-book { display: flex; gap: .75rem; align-items: center; padding: .75rem .9rem; background: var(--surface-2); border-radius: var(--radius-sm); font-size: .9rem; }
.sh-book i { color: var(--c-subject); font-size: 1.2rem; }
.sh-book small { display: block; color: var(--ink-3); font-size: .78rem; }
.sh-stats { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; font-size: .9rem; color: var(--ink-2); }
.sh-stats b { color: var(--ink); font-size: 1.15rem; margin-inline-end: .25rem; }
.sh-hero-actions { display: flex; flex-wrap: wrap; gap: .6rem; }
@media (min-width: 760px) { .sh-hero { grid-template-columns: 1fr auto; } .sh-hero-actions { grid-column: 1 / -1; } .sh-book { align-self: start; max-width: 20rem; } }

/* ── 7. أزرار وشارات ─────────────────────────────────────────────── */
.sh-btn {
  display: inline-flex; align-items: center; gap: .5rem; padding: .6rem 1rem; border-radius: var(--radius-sm);
  font-size: .92rem; font-weight: 500; border: 1px solid var(--line); background: var(--surface); color: var(--ink-2);
  transition: background .15s, border-color .15s, color .15s;
}
.sh-btn:hover { background: var(--surface-2); color: var(--ink); }
.sh-btn:disabled { opacity: .55; cursor: not-allowed; }
.sh-btn-primary { background: var(--c-subject); border-color: var(--c-subject); color: #fff; }
.sh-btn-primary:hover { filter: brightness(.92); color: #fff; }
@media (prefers-color-scheme: dark) { .sh-btn-primary, .sh-btn-primary:hover { color: #0F1720; } }
.sh-btn-soft { background: var(--c-subject-soft); border-color: transparent; color: var(--c-subject); }
.sh-btn-soft:hover { filter: brightness(.96); color: var(--c-subject); }
.sh-btn-sm { padding: .4rem .7rem; font-size: .82rem; }
.sh-btn[aria-pressed="true"] { background: var(--c-subject-soft); border-color: transparent; color: var(--c-subject); }
.sh-btn[aria-pressed="true"] .sh-ic { color: var(--c-subject); }
.sh-btn-icon { width: 2.4rem; height: 2.4rem; padding: 0; justify-content: center; }
.sh-chip { display: inline-flex; align-items: center; gap: .35rem; padding: .2rem .65rem; border-radius: 99px; font-size: .78rem; font-weight: 500; background: var(--surface-2); color: var(--ink-2); }
.sh-chip-subject { background: var(--c-subject-soft); color: var(--c-subject); }
.sh-chip-ok { background: var(--accent-soft); color: var(--accent); }
.sh-chip-warn { background: var(--warn-soft); color: var(--warn); }

/* ── 8. بطاقات وأقسام ─────────────────────────────────────────────── */
.sh-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem 1.4rem; }
.sh-section-title { font-size: 1.05rem; font-weight: 700; margin: 0 0 .75rem; display: flex; align-items: center; gap: .55rem; }
.sh-section-title i { color: var(--c-subject); }
.sh-outcomes { columns: 1; gap: 1.5rem; padding: 0; margin: 0; list-style: none; }
@media (min-width: 700px) { .sh-outcomes { columns: 2; } }
.sh-outcomes li { break-inside: avoid; padding: .35rem 1.4rem .35rem 0; position: relative; color: var(--ink-2); font-size: .95rem; }
.sh-outcomes li::before { content: ""; position: absolute; inset-inline-start: 0; top: .95rem; width: .7rem; height: .7rem; border-radius: 3px; background: var(--c-subject-soft); border: 2px solid var(--c-subject); }

/* ── 9. فهرس الدروس (TOC) ────────────────────────────────────────── */
.sh-toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.sh-toc-head { display: flex; align-items: center; justify-content: space-between; padding: .85rem 1rem; border-bottom: 1px solid var(--line); font-weight: 700; }
.sh-toc-head small { color: var(--ink-3); font-weight: 400; font-size: .78rem; }
.sh-unit { border-bottom: 1px solid var(--line); }
.sh-unit:last-child { border-bottom: 0; }
.sh-unit > button {
  width: 100%; display: grid; grid-template-columns: auto 1fr auto; gap: .6rem; align-items: center;
  text-align: start; padding: .7rem .9rem; background: var(--surface); font-size: .9rem; font-weight: 500;
}
.sh-unit > button:hover { background: var(--surface-2); }
.sh-unit > button .chev { color: var(--ink-3); font-size: .7rem; transition: rotate .2s; }
.sh-unit[data-open="true"] > button .chev { rotate: -90deg; }
.sh-unit > button .pg { color: var(--ink-3); font-size: .75rem; font-weight: 400; }
.sh-unit-progress { height: 3px; background: var(--surface-2); }
.sh-unit-progress i { display: block; height: 100%; background: var(--c-subject); transition: width .3s; }
.sh-unit ol { list-style: none; margin: 0; padding: .25rem 0 .4rem; background: var(--bg); }
.sh-unit[data-open="false"] ol { display: none; }
.sh-unit ol a {
  display: grid; grid-template-columns: 1.25rem 1fr auto; gap: .55rem; align-items: baseline;
  padding: .5rem .9rem .5rem 1rem; font-size: .88rem; color: var(--ink-2); border-inline-start: 3px solid transparent;
}
.sh-unit ol a:hover { background: var(--surface-2); color: var(--ink); }
.sh-unit ol a[aria-current="true"] { border-inline-start-color: var(--c-subject); color: var(--c-subject); font-weight: 700; background: var(--surface); }
.sh-unit ol a .tick { width: 1.05rem; height: 1.05rem; display: grid; place-items: center; font-size: .95rem; align-self: center; color: var(--line-strong); }
.sh-unit ol a.st-started .tick { color: var(--c-subject); }
.sh-unit ol a.st-done .tick { color: var(--accent); }
.sh-unit ol a.st-done { color: var(--ink-3); }
.sh-unit ol a .pg { color: var(--ink-3); font-size: .8rem; }
.sh-toc-close { display: none; }
.sh-toc-drawer-btn { display: inline-flex; }
@media (min-width: 1024px) { .sh-toc-drawer-btn { display: none; } }
/* على الهاتف، حين يُفتح درس: اطوِ تعريف المادة وأهدافها ليبدأ الطالب من الدرس مباشرة */
@media (max-width: 1023px) {
  .sh-toc-close { display: inline-flex; }
  body[data-lesson-open="true"] #sh-outcomes { display: none; }
  body[data-lesson-open="true"] .sh-hero { padding: .9rem 1rem; gap: .6rem; }
  body[data-lesson-open="true"] .sh-hero .sh-stats,
  body[data-lesson-open="true"] .sh-hero .sh-progress,
  body[data-lesson-open="true"] .sh-hero .sh-book { display: none; }
  body[data-lesson-open="true"] .sh-hero h1 { font-size: 1.15rem; }
  body[data-lesson-open="true"] .sh-hero .tagline { display: none; }
  body[data-lesson-open="true"] .sh-hero-icon { width: 2.2rem; height: 2.2rem; font-size: 1rem; border-radius: .6rem; }
}
@media (max-width: 1023px) {
  .sh-side { position: fixed; inset: 0; z-index: 60; background: rgba(20,33,46,.45); padding: 1rem; display: none; }
  .sh-side[data-open="true"] { display: block; }
  .sh-side .sh-toc { max-height: 100%; overflow-y: auto; max-width: 26rem; margin-inline-start: auto; }
}

/* ── 10. عرض الدرس ───────────────────────────────────────────────── */
.sh-lesson-head { display: grid; gap: .6rem; }
.sh-lesson-head .unit { color: var(--c-subject); font-size: .85rem; font-weight: 700; }
.sh-lesson-head h1 { font-size: clamp(1.45rem, 3vw, 1.95rem); line-height: 1.3; margin: 0; }
.sh-lesson-meta { display: flex; flex-wrap: wrap; gap: .45rem; align-items: center; }
.sh-lesson-actions { display: flex; flex-wrap: wrap; gap: .5rem; padding-top: .6rem; border-top: 1px dashed var(--line); margin-top: .4rem; }

.sh-prose { max-width: 44rem; font-size: 1.04rem; line-height: 1.95; color: var(--ink); }
.sh-prose h2 { font-size: 1.28rem; font-weight: 700; margin: 2rem 0 .6rem; padding-inline-start: .9rem; border-inline-start: 4px solid var(--c-subject); line-height: 1.35; }
.sh-prose h3 { font-size: 1.1rem; font-weight: 700; margin: 1.4rem 0 .4rem; }
.sh-prose p { margin: 0 0 .9rem; }
.sh-prose ul, .sh-prose ol { margin: 0 0 1rem; padding-inline-start: 1.4rem; }
.sh-prose li { margin-bottom: .3rem; }
.sh-prose strong { color: var(--ink); font-weight: 700; }
.sh-prose .lede { font-size: 1.1rem; color: var(--ink-2); }
.sh-objectives { list-style: none; padding: 0; margin: 0 0 1rem; display: grid; gap: .45rem; }
.sh-objectives li { display: grid; grid-template-columns: 1.6rem 1fr; gap: .5rem; align-items: start; background: var(--surface-2); padding: .55rem .8rem; border-radius: var(--radius-sm); font-size: .96rem; }
.sh-objectives li i { color: var(--c-subject); padding-top: .35rem; }
.sh-terms { display: grid; grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr)); gap: .5rem; margin: 0 0 1.2rem; padding: 0; list-style: none; }
.sh-terms li { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: .55rem .8rem; font-size: .92rem; }
.sh-terms b { color: var(--c-subject); display: block; }
.sh-example { border: 1px solid var(--line); border-inline-start: 4px solid var(--c-subject); border-radius: var(--radius-sm); padding: .8rem 1rem; margin: .9rem 0 1.1rem; background: var(--surface); }
.sh-example .lbl { font-size: .8rem; font-weight: 700; color: var(--c-subject); margin-bottom: .3rem; }
.sh-example .why { color: var(--ink-2); font-size: .94rem; margin-top: .45rem; padding-top: .45rem; border-top: 1px dashed var(--line); }
.sh-callout { display: grid; grid-template-columns: auto 1fr; gap: .7rem; padding: .8rem 1rem; border-radius: var(--radius-sm); margin: .9rem 0 1.1rem; font-size: .96rem; }
.sh-callout i { padding-top: .3rem; }
.sh-callout-tip { background: var(--accent-soft); } .sh-callout-tip i { color: var(--accent); }
.sh-callout-note { background: var(--c-subject-soft); } .sh-callout-note i { color: var(--c-subject); }
.sh-callout-warn { background: var(--warn-soft); } .sh-callout-warn i { color: var(--warn); }
.sh-callout-quote { background: var(--surface-2); } .sh-callout-quote i { color: var(--ink-3); }
.sh-check { border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1rem; margin: 1rem 0 1.3rem; background: var(--surface-2); }
.sh-check .q { font-weight: 700; margin-bottom: .6rem; }
.sh-check .opts { display: grid; gap: .4rem; }
.sh-check .opts button { text-align: start; padding: .55rem .8rem; border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--surface); font-size: .94rem; }
.sh-check .opts button:hover:not(:disabled) { border-color: var(--c-subject); }
.sh-check .opts button.right { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 700; }
.sh-check .opts button.wrong { border-color: var(--warn); background: var(--warn-soft); color: var(--warn); }
.sh-check .why { margin-top: .6rem; font-size: .9rem; color: var(--ink-2); padding-inline-start: .8rem; border-inline-start: 3px solid var(--line-strong); }
.sh-summary { background: var(--c-subject-soft); border-radius: var(--radius); padding: 1rem 1.2rem; margin: 1.4rem 0; }
.sh-summary ul { margin: .3rem 0 0; }
.sh-pager { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-top: 1.5rem; }
.sh-pager a { display: grid; gap: .15rem; padding: .8rem 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.sh-pager a:hover { border-color: var(--c-subject); }
.sh-pager a small { color: var(--ink-3); font-size: .76rem; }
.sh-pager a span { font-weight: 700; font-size: .95rem; }
.sh-pager a.next { text-align: end; }
.sh-pager .empty { visibility: hidden; }
.sh-done { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; padding: .9rem 1.1rem; border-radius: var(--radius); background: var(--surface-2); }
.sh-done.is-done { background: var(--accent-soft); }
.sh-placeholder { padding: 1.4rem; border: 1.5px dashed var(--line-strong); border-radius: var(--radius); color: var(--ink-2); display: grid; gap: .6rem; }
.sh-placeholder i { color: var(--c-subject); font-size: 1.4rem; }

/* ── 11. نظرة عامة على الوحدات ─────────────────────────────────── */
.sh-units { display: grid; gap: .75rem; }
.sh-unit-card { display: grid; grid-template-columns: auto 1fr auto; gap: .9rem; align-items: center; padding: .95rem 1.1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.sh-unit-card:hover { border-color: var(--c-subject); }
.sh-unit-card .num { width: 2.4rem; height: 2.4rem; border-radius: .7rem; background: var(--c-subject-soft); color: var(--c-subject); display: grid; place-items: center; font-weight: 700; }
.sh-unit-card h3 { margin: 0; font-size: 1rem; font-weight: 700; }
.sh-unit-card p { margin: .15rem 0 0; font-size: .88rem; color: var(--ink-3); }
.sh-unit-card .ring { font-size: .78rem; color: var(--ink-3); text-align: center; }
.sh-unit-card .ring b { display: block; color: var(--c-subject); font-size: 1rem; }

/* ── 12. ذات الصلة / الخطوة التالية ─────────────────────────────── */
.sh-related { display: grid; gap: .6rem; }
@media (min-width: 700px) { .sh-related { grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); } }
.sh-rel { display: grid; gap: .3rem; padding: .85rem 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); border-inline-start: 4px solid var(--rc, var(--line-strong)); }
.sh-rel:hover { background: var(--surface-2); }
.sh-rel .subj { font-size: .76rem; font-weight: 700; color: var(--rc, var(--ink-3)); }
.sh-rel .ttl { font-weight: 700; font-size: .95rem; }
.sh-rel .why { font-size: .84rem; color: var(--ink-2); }
.sh-next { display: grid; gap: .6rem; }
.sh-next a { display: flex; align-items: center; gap: .9rem; padding: .9rem 1.1rem; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.sh-next a:hover { border-color: var(--nc, var(--c-subject)); }
.sh-next .ico { width: 2.6rem; height: 2.6rem; border-radius: .8rem; background: var(--ns, var(--c-subject-soft)); color: var(--nc, var(--c-subject)); display: grid; place-items: center; flex: none; }
.sh-next small { display: block; color: var(--ink-3); font-size: .78rem; }
.sh-next b { font-size: .96rem; }

/* ── 13. لوحة الصف ──────────────────────────────────────────────── */
.sh-subjects { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr)); }
.sh-subj { --c-subject: var(--sc); --c-subject-soft: var(--ss); display: grid; gap: .8rem; padding: 1.15rem 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); position: relative; overflow: hidden; }
.sh-subj::before { content: ""; position: absolute; inset-block: 0; inset-inline-start: 0; width: .4rem; background: var(--sc); }
.sh-subj:hover { box-shadow: var(--shadow); }
.sh-subj .head { display: flex; gap: .8rem; align-items: flex-start; }
.sh-subj .ico { width: 2.9rem; height: 2.9rem; border-radius: .85rem; background: var(--ss); color: var(--sc); display: grid; place-items: center; font-size: 1.2rem; flex: none; }
.sh-subj h3 { margin: 0; font-size: 1.05rem; font-weight: 700; }
.sh-subj h3 a:hover { color: var(--sc); }
.sh-subj .desc { margin: .15rem 0 0; font-size: .9rem; color: var(--ink-3); line-height: 1.5; }
.sh-subj .meta { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; font-size: .84rem; color: var(--ink-3); }
.sh-subj .actions { display: flex; gap: .5rem; margin-top: auto; flex-wrap: wrap; }
.sh-subj .actions .sh-btn { white-space: nowrap; flex: 1 1 8.5rem; }
.sh-subj .actions > * { flex: 1; justify-content: center; }
.sh-progress { height: .4rem; background: var(--surface-2); border-radius: 99px; overflow: hidden; }
.sh-progress i { display: block; height: 100%; background: var(--c-subject); border-radius: 99px; transition: width .4s; }
.sh-progress-row { display: flex; justify-content: space-between; font-size: .82rem; color: var(--ink-3); margin-bottom: .3rem; }
.sh-continue { display: grid; grid-template-columns: auto 1fr auto; gap: 1rem; align-items: center; padding: 1rem 1.2rem; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.sh-continue .ico { width: 3rem; height: 3rem; border-radius: .9rem; background: var(--c-subject-soft); color: var(--c-subject); display: grid; place-items: center; font-size: 1.2rem; }
.sh-continue small { display: block; color: var(--ink-3); font-size: .8rem; }
.sh-continue b { font-size: 1.02rem; }
@media (max-width: 560px) { .sh-continue { grid-template-columns: auto 1fr; } .sh-continue .sh-btn { grid-column: 1 / -1; justify-content: center; } }

/* ── 14. المساعد والاختبار ──────────────────────────────────────── */
.sh-scrim { position: fixed; inset: 0; z-index: 80; background: rgba(20,33,46,.45); backdrop-filter: blur(2px); display: flex; }
.sh-panel { margin-inline-start: auto; width: min(100%, 30rem); height: 100dvh; max-height: 100dvh; background: var(--surface); display: flex; flex-direction: column; box-shadow: var(--shadow); }
.sh-modal { margin: auto; width: min(100% - 2rem, 40rem); max-height: calc(100dvh - 2rem); background: var(--surface); border-radius: var(--radius); display: flex; flex-direction: column; box-shadow: var(--shadow); overflow: hidden; }
.sh-dlg-head { flex: none; display: flex; align-items: center; gap: .75rem; padding: .9rem 1.1rem; border-bottom: 1px solid var(--line); }
.sh-dlg-head .ico { width: 2.5rem; height: 2.5rem; border-radius: .75rem; background: var(--c-subject); color: #fff; display: grid; place-items: center; flex: none; }
.sh-dlg-head .ttl { flex: 1; min-width: 0; line-height: 1.25; }
.sh-dlg-head .ttl b { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sh-dlg-head .ttl small { color: var(--ink-3); font-size: .78rem; }
.sh-dlg-body { flex: 1 1 auto; min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding: 1.1rem; background: var(--bg); }
.sh-dlg-foot { flex: none; padding: .85rem 1rem calc(.85rem + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: var(--surface); }
.sh-msg { display: flex; margin-bottom: .6rem; }
.sh-msg.user { justify-content: flex-start; } .sh-msg.assistant, .sh-msg.error { justify-content: flex-end; }
.sh-msg > div { max-width: 86%; padding: .65rem .95rem; border-radius: 1rem; font-size: .95rem; line-height: 1.7; white-space: pre-wrap; word-break: break-word; }
.sh-msg.user > div { background: var(--c-subject); color: #fff; border-end-start-radius: .3rem; }
@media (prefers-color-scheme: dark) { .sh-msg.user > div { color: #0F1720; } }
.sh-msg.assistant > div { background: var(--surface); border: 1px solid var(--line); border-end-end-radius: .3rem; }
.sh-msg.error > div { background: var(--warn-soft); color: var(--warn); }
.sh-suggest { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: .6rem; }
.sh-suggest button { font-size: .8rem; padding: .35rem .75rem; border-radius: 99px; border: 1px solid var(--line); background: var(--surface); }
.sh-suggest button:hover { border-color: var(--c-subject); color: var(--c-subject); }
.sh-compose { display: flex; gap: .5rem; align-items: flex-end; }
.sh-compose textarea { flex: 1; resize: none; background: var(--surface-2); border: 1px solid transparent; border-radius: var(--radius-sm); padding: .7rem .9rem; font: inherit; font-size: .95rem; max-height: 8rem; color: var(--ink); }
.sh-compose textarea:focus { outline: none; background: var(--surface); border-color: var(--line-strong); box-shadow: 0 0 0 3px var(--c-subject-soft); }
.sh-dots { display: inline-flex; gap: .3rem; padding: .9rem 1rem; background: var(--surface); border: 1px solid var(--line); border-radius: 1rem; }
.sh-dots i { width: .4rem; height: .4rem; border-radius: 50%; background: var(--c-subject); animation: sh-blink 1.1s infinite; }
.sh-dots i:nth-child(2) { animation-delay: .15s; } .sh-dots i:nth-child(3) { animation-delay: .3s; }
@keyframes sh-blink { 0%,60%,100% { opacity: .25 } 30% { opacity: 1 } }
.sh-quiz-q { padding: 1rem 0; border-top: 1px solid var(--line); }
.sh-quiz-q:first-child { border-top: 0; padding-top: 0; }
.sh-quiz-q .q { font-weight: 700; margin-bottom: .6rem; line-height: 1.6; }
.sh-quiz-q .opts { display: grid; gap: .45rem; }
.sh-quiz-q .opts button { text-align: start; padding: .65rem .9rem; border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--surface); font-size: .95rem; }
.sh-quiz-q .opts button:hover:not(:disabled) { border-color: var(--c-subject); }
.sh-quiz-q .opts button:disabled { opacity: .75; }
.sh-quiz-q .opts button.right { border: 2px solid var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 700; opacity: 1; }
.sh-quiz-q .opts button.wrong { border: 2px solid var(--warn); background: var(--warn-soft); color: var(--warn); opacity: 1; }
.sh-quiz-q .why { margin-top: .6rem; font-size: .88rem; color: var(--ink-2); padding-inline-start: .8rem; border-inline-start: 3px solid var(--line-strong); }
.sh-verdict { text-align: center; padding: 1.4rem 0 .4rem; border-top: 1px solid var(--line); margin-top: 1rem; }
.sh-verdict .pct { font-size: 3rem; font-weight: 700; line-height: 1; }
.sh-verdict .pct.hi { color: var(--accent); } .sh-verdict .pct.mid { color: var(--c-subject); } .sh-verdict .pct.lo { color: var(--warn); }
.sh-gaps { margin-top: 1rem; padding: 1rem; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); text-align: start; }
.sh-gaps ul { margin: .4rem 0 .8rem; padding-inline-start: 1.2rem; font-size: .92rem; color: var(--ink-2); }
.sh-center { text-align: center; padding: 2rem 1rem; color: var(--ink-3); }

/* ── 15. تذييل، حركة، طباعة ─────────────────────────────────────── */
.sh-footer { margin-top: 3rem; border-top: 1px solid var(--line); padding: 1.5rem 0 2rem; font-size: .85rem; color: var(--ink-3); }
.sh-footer .sh-wrap { display: flex; flex-wrap: wrap; gap: .75rem 2rem; justify-content: space-between; align-items: center; }
.sh-footer nav { display: flex; flex-wrap: wrap; gap: .25rem .9rem; }
.sh-footer a:hover { color: var(--ink); }
.sh-fade { animation: sh-fade .25s ease-out; }
@keyframes sh-fade { from { opacity: 0; translate: 0 6px } to { opacity: 1; translate: 0 } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }
@media print {
  .sh-header, .sh-side, .sh-lesson-actions, .sh-pager, .sh-done, .sh-footer, .sh-scrim { display: none !important; }
  .sh-page { grid-template-columns: 1fr; }
  body { background: #fff; color: #000; }
}

/* ── 16. أداة تمرين الطباعة (/tools/typing) ──────────────────────── */
.sh-type-controls { display: flex; flex-wrap: wrap; gap: .75rem 1.25rem; margin-bottom: 1rem; }
.sh-type-group { display: flex; gap: .4rem; }
.sh-type-target {
  font-size: clamp(1.05rem, 1rem + .6vw, 1.35rem); line-height: 2.1; margin: 0 0 1rem;
  padding: 1rem 1.15rem; border-radius: var(--radius); background: var(--surface-2);
  border: 1px solid var(--line); overflow-wrap: anywhere; white-space: pre-wrap; min-height: 5.5rem;
}
.sh-type-target span { border-radius: 3px; }
.sh-type-target span.ok { color: var(--accent); }
.sh-type-target span.bad { color: var(--warn); background: var(--warn-soft); text-decoration: underline wavy; }
.sh-type-target span.cur { background: var(--c-subject-soft); box-shadow: inset 0 -2px 0 var(--c-subject); }
.sh-type-actions { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.sh-type-label { display: block; font-weight: 500; font-size: .9rem; margin-bottom: .4rem; color: var(--ink-2); }
.sh-type-input {
  display: block; width: 100%; resize: vertical; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 1.15rem 1.25rem;
  font: inherit; font-size: clamp(1.15rem, 1.05rem + .4vw, 1.45rem); line-height: 2;
  min-height: clamp(13rem, 34vh, 21rem);
}
@media (max-width: 520px) { .sh-type-input { min-height: clamp(11rem, 28vh, 16rem); font-size: 1.1rem; padding: .95rem 1rem; } }
.sh-type-input:focus { outline: none; border-color: var(--c-subject); box-shadow: 0 0 0 3px var(--c-subject-soft); }
.sh-type-input:disabled { background: var(--surface-2); color: var(--ink-3); }
.sh-type-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: .6rem; margin: 1.1rem 0 .4rem; }
.sh-type-stats > div { background: var(--surface-2); border-radius: var(--radius-sm); padding: .8rem .5rem; text-align: center; }
.sh-type-stats strong { display: block; font-size: 1.5rem; line-height: 1.2; color: var(--c-subject); }
.sh-type-stats span { font-size: .8rem; color: var(--ink-3); }
.sh-type-status { min-height: 1.5rem; margin: .2rem 0 0; font-size: .9rem; color: var(--ink-2); }
.sh-type-best { font-weight: 500; color: var(--ink-2); margin: 0; }
.sh-type-runs { list-style: none; margin: .9rem 0 0; padding: 0; display: grid; gap: .4rem; }
.sh-type-runs li { display: flex; align-items: baseline; gap: .5rem; padding: .55rem .8rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface-2); font-size: .9rem; }
.sh-type-runs b { font-size: 1.1rem; color: var(--c-subject); }
.sh-type-runs em { font-style: normal; color: var(--accent); font-weight: 500; }
.sh-type-runs small { margin-inline-start: auto; color: var(--ink-3); }
@media (max-width: 520px) { .sh-type-stats strong { font-size: 1.25rem; } }

/* ── 17. شعار KHW والشهادة داخل أداة الطباعة ─────────────────────── */
.sh-type-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: .35rem; }
.sh-brandmenu { position: relative; flex: none; }
.sh-brandmenu-btn { width: 3.75rem; height: 3.75rem; padding: 3px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); box-shadow: var(--shadow); cursor: pointer; transition: transform .15s; }
.sh-brandmenu-btn:hover { transform: translateY(-1px); }
.sh-brandmenu-btn img { width: 100%; height: 100%; display: block; border-radius: 50%; }
.sh-brandmenu-list { position: absolute; inset-inline-end: 0; top: 4rem; z-index: 40; width: min(18rem, 78vw); padding: .5rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.sh-brandmenu-list p { margin: .35rem .6rem .5rem; font-size: .78rem; font-weight: 500; color: var(--ink-3); }
.sh-brandmenu-list a { display: flex; flex-direction: column; gap: .1rem; padding: .6rem .75rem; border-radius: var(--radius-sm); color: var(--ink); }
.sh-brandmenu-list a:hover, .sh-brandmenu-list a:focus-visible { background: var(--c-subject-soft); outline: none; }
.sh-brandmenu-list a[aria-current] { background: var(--c-subject-soft); box-shadow: inset -3px 0 0 var(--c-subject, currentColor); }
.sh-brandmenu-list a[aria-current] span::after { content: " · أنت هنا"; }
.sh-brandmenu-list b { font-weight: 500; font-size: .92rem; }
.sh-brandmenu-list span { font-size: .78rem; color: var(--ink-3); direction: ltr; unicode-bidi: plaintext; }
.sh-brandmenu-all { width: 100%; margin-top: .4rem; padding: .6rem; font: inherit; font-size: .88rem; font-weight: 500; cursor: pointer; color: var(--c-subject); background: var(--c-subject-soft); border: 1px dashed var(--line-strong); border-radius: var(--radius-sm); }
.sh-brandmenu-all:hover { filter: brightness(.97); }
.sh-brandmenu-warn { margin: .4rem .1rem 0; font-size: .78rem; color: var(--warn); background: var(--warn-soft); border-radius: var(--radius-sm); padding: .45rem .6rem; }

.sh-cert-box { margin-top: 1.1rem; padding: 1.1rem; border: 1px dashed var(--line-strong); border-radius: var(--radius); background: var(--bg); }
.sh-cert-box .hint { margin: -.4rem 0 .85rem; font-size: .9rem; color: var(--ink-3); line-height: 1.7; }
.sh-cert-form { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.sh-cert-form input { flex: 1 1 14rem; min-height: 2.75rem; padding: .55rem .85rem; font: inherit; color: var(--ink); background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--radius-sm); }
.sh-cert-form input:focus { outline: none; border-color: var(--c-subject); box-shadow: 0 0 0 3px var(--c-subject-soft); }
.sh-cert { margin-top: 1rem; position: relative; padding: clamp(1.2rem, 4vw, 2.2rem); text-align: center; background: var(--surface); border: 2px solid var(--c-subject); border-radius: var(--radius); overflow: hidden; }
.sh-cert::before { content: ""; position: absolute; inset: .5rem; border: 1px solid var(--c-subject-soft); border-radius: calc(var(--radius) - 6px); pointer-events: none; }
.sh-cert .seal { width: 3.6rem; height: 3.6rem; margin: 0 auto .7rem; border-radius: 50%; background: var(--c-subject); color: #fff; display: grid; place-items: center; font-size: 1.5rem; font-weight: 700; }
@media (prefers-color-scheme: dark) { .sh-cert .seal { color: #0F1720; } }
.sh-cert .kicker { margin: 0; font-size: .85rem; font-weight: 700; color: var(--brand-ink); letter-spacing: .02em; }
.sh-cert h3 { margin: .3rem 0 .2rem; font-size: clamp(1.15rem, 3vw, 1.5rem); }
.sh-cert .who { display: inline-block; max-width: 100%; margin: .8rem 0 .2rem; padding: 0 1rem .45rem; font-size: clamp(1.3rem, 4vw, 1.9rem); font-weight: 700; color: var(--c-subject); border-bottom: 2px solid var(--c-subject-soft); overflow-wrap: anywhere; }
.sh-cert .body { max-width: 46ch; margin: .8rem auto 0; color: var(--ink-2); font-size: .95rem; line-height: 1.9; }
.sh-cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .65rem; margin: 1.2rem 0 .3rem; }
.sh-cert-grid div { padding: .8rem .4rem; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.sh-cert-grid strong { display: block; font-size: 1.45rem; line-height: 1.2; color: var(--c-subject); }
.sh-cert-grid span { font-size: .78rem; color: var(--ink-3); }
.sh-cert-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .4rem 1.2rem; margin-top: 1rem; padding-top: .8rem; border-top: 1px solid var(--line); font-size: .78rem; color: var(--ink-3); }
.sh-cert-foot code { font-family: ui-monospace, Menlo, Consolas, monospace; letter-spacing: .08em; color: var(--brand-ink); }
.sh-cert-actions { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .85rem; }
@media (max-width: 520px) { .sh-cert-grid { grid-template-columns: 1fr; } .sh-brandmenu-btn { width: 3rem; height: 3rem; } .sh-brandmenu-list { top: 3.5rem; } }
@media print {
  body > *:not(main), main > *:not(#sh-main), #sh-main > *:not(#cert-box) { display: none !important; }
  #cert-box { border: 0; padding: 0; background: #fff; }
  #cert-box h2, #cert-box .hint, .sh-cert-form, .sh-cert-actions { display: none !important; }
  .sh-cert { break-inside: avoid; }
}