/* =========================================================================
   قِمّة — رياضيات 5 وحدات  |  ملف التصميم
   الأسلوب: «دفتر الرياضيات» — ورق مربّعات دافئ، حبر كحليّ، لون مميّز واحد
   (حبر أزرق)، وقلم تظليل أصفر للإبراز فقط. أخضر = إتقان، أحمر = قلم التصحيح.
   كلّ الاتجاهات منطقية (RTL أوّلًا). لا letter-spacing على النصّ العربيّ.
   ========================================================================= */

:root {
  /* الورق والحبر */
  --paper: #fbfaf5;
  --paper-2: #f4f1e6;
  --grid: rgba(22, 33, 61, .05);
  --ink: #16213d;
  --text: #262f47;
  --muted: #5e6479;
  --line: #ddd8c7;
  --card: #ffffff;
  --bg: var(--paper);

  /* الحبر الأزرق — اللون المميّز الوحيد */
  --blue: #1f4fd1;
  --blue-600: #1a42b3;
  --blue-700: #163795;
  --blue-50: #eef2fc;
  --blue-100: #d6dff7;

  /* قلم التظليل */
  --marker: #ffe27a;
  --marker-soft: #fff5c9;
  --marker-ink: #6b4e00;

  /* الحالات: أخضر (إتقان/صحيح) وأحمر (قلم التصحيح) */
  --green: #177a55;
  --green-50: #e8f4ed;
  --rose: #c8322b;
  --rose-50: #fdeeec;
  --amber: #d99a00;
  --amber-50: var(--marker-soft);

  /* أسماء قديمة تستعملها بعض الصفحات — تُبقى متوافقة */
  --teal: var(--green);
  --teal-600: #11613f;
  --teal-50: var(--green-50);
  --teal-100: #c9e5d4;
  --teal-400: #3a9d74;
  --teal-500: var(--green);
  --navy-900: var(--ink);
  --navy-800: #1e2b4d;
  --navy-700: var(--blue-700);
  --navy-600: var(--blue);
  --navy-100: var(--blue-100);

  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 0 rgba(22, 33, 61, .06);
  --shadow: 0 1px 2px rgba(40, 34, 12, .05), 0 6px 18px rgba(40, 34, 12, .06);
  --shadow-lg: 0 18px 44px rgba(30, 28, 16, .16);
  --shadow-hard: 4px 4px 0 var(--ink);

  --font: "Readex Pro", "IBM Plex Sans Arabic", "Segoe UI", Tahoma, Arial, sans-serif;
  --font-math: "Cambria Math", "STIX Two Math", "Latin Modern Math", "Times New Roman", serif;
  --maxw: 1180px;
  --ease: cubic-bezier(.2, .8, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: var(--blue); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--blue-700); }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.4; margin: 0 0 .5em; font-weight: 700; text-wrap: balance; }
h1 { font-size: clamp(1.9rem, 3.8vw, 3rem); }
h2 { font-size: clamp(1.3rem, 2.3vw, 1.7rem); }
h3 { font-size: 1.1rem; font-weight: 600; }
p { margin: 0 0 1em; text-wrap: pretty; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid rgba(31, 79, 209, .45); outline-offset: 2px; border-radius: 6px; }
::selection { background: var(--marker); color: var(--ink); }

.skip {
  position: absolute; inset-inline-start: 1rem; top: -120px; z-index: 60;
  background: var(--ink); color: #fff; padding: .6rem 1.1rem; border-radius: 8px; font-weight: 600;
}
.skip:focus { top: .7rem; color: #fff; }

.container { width: min(var(--maxw), 100% - 2.5rem); margin-inline: auto; }
.section { padding-block: 4rem 4.5rem; }
.section-sm { padding-block: 2rem 2.4rem; }
.muted { color: var(--muted); }
.small { font-size: .88rem; }
.center { text-align: center; }
.stack > * + * { margin-top: 1rem; }
.row { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.num, .kpi b, .stat2 b, .timer, .score, .heat, .badge { font-variant-numeric: tabular-nums; }

/* القلم الأصفر: <span class="hl"> */
.hl, .marker {
  background: linear-gradient(transparent 56%, var(--marker) 56%, var(--marker) 92%, transparent 92%);
  -webkit-box-decoration-break: clone; box-decoration-break: clone; padding-inline: .08em;
}

/* ---------- الرياضيات داخل النصّ العربيّ ---------- */
.m {
  font-family: var(--font-math);
  direction: ltr;
  unicode-bidi: isolate;
  display: inline-block;
  white-space: nowrap;
  font-size: 1.08em;
  padding-inline: .12em;
  color: var(--ink);
}
.m sup { font-size: .68em; vertical-align: .6em; line-height: 0; }
.m sub { font-size: .68em; vertical-align: -.3em; line-height: 0; }
.fr { display: inline-flex; flex-direction: column; vertical-align: middle; text-align: center; margin-inline: .12em; line-height: 1.15; }
.fr > span:first-child { border-bottom: 1.3px solid currentColor; padding-inline: .15em; }
.fr > span { font-size: .9em; }
.rad { border-top: 1.3px solid currentColor; padding-inline: .1em; }
.vec { position: relative; display: inline-block; padding-top: .25em; }
.vec::before { content: "→"; position: absolute; top: -.55em; left: 0; right: 0; text-align: center; font-size: .75em; }
.ov { text-decoration: overline; }
.m-block { display: block; text-align: center; margin: .8rem 0; font-size: 1.12em; white-space: normal; }

/* ---------- الشريط العلويّ ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 250, 245, .92);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1.5px solid var(--ink);
}
.topbar .container { display: flex; align-items: center; gap: 1.5rem; min-height: 68px; }
.brand { display: flex; align-items: center; gap: .65rem; color: var(--ink); font-weight: 700; font-size: 1.25rem; white-space: nowrap; }
.brand:hover { color: var(--ink); }
.brand small { display: block; font-size: .72rem; font-weight: 500; color: var(--blue); }
.brand-mark { width: 40px; height: 40px; flex: none; }
.nav { display: flex; gap: .15rem; align-items: center; margin-inline-start: auto; }
.nav a {
  color: #4b5168; padding: .45rem .8rem; font-weight: 500; font-size: .95rem; border-radius: 6px; white-space: nowrap;
  transition: background .2s var(--ease), color .2s var(--ease), box-shadow .2s var(--ease);
}
.nav a:hover { color: var(--ink); background: var(--marker-soft); }
.nav a.active { color: var(--ink); box-shadow: inset 0 -3px 0 var(--blue); border-radius: 0; }
.nav-user { display: flex; align-items: center; gap: .5rem; margin-inline-start: .75rem; }
.avatar {
  width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center;
  background: var(--blue); color: #fff; font-weight: 700; font-size: .95rem;
}
.user-menu { position: relative; }
.user-menu > button {
  display: flex; align-items: center; gap: .5rem; background: transparent; border: 0; color: var(--ink);
  font: inherit; cursor: pointer; padding: .25rem .5rem; border-radius: 10px; transition: background .2s var(--ease);
}
.user-menu > button:hover { background: var(--marker-soft); }
.user-menu .who { text-align: start; line-height: 1.25; font-weight: 500; }
.user-menu .who small { display: block; color: var(--blue); font-size: .72rem; }
.menu-pop {
  position: absolute; inset-inline-end: 0; top: calc(100% + 8px); min-width: 220px;
  background: #fff; border-radius: 10px; box-shadow: var(--shadow-hard); padding: .4rem; border: 1.5px solid var(--ink);
}
.menu-pop a, .menu-pop button {
  display: flex; width: 100%; gap: .6rem; align-items: center; padding: .6rem .8rem; border-radius: 6px;
  color: var(--text); background: none; border: 0; font: inherit; cursor: pointer; text-align: start;
}
.menu-pop a:hover, .menu-pop button:hover { background: var(--marker-soft); color: var(--ink); }
.nav-toggle { display: none; margin-inline-start: auto; background: none; border: 0; color: var(--ink); cursor: pointer; padding: .4rem; }

@media (max-width: 1100px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: 68px; inset-inline: 0; flex-direction: column; align-items: stretch;
    background: var(--paper); padding: .75rem 1.25rem 1.25rem; gap: .2rem; display: none; margin: 0;
    box-shadow: var(--shadow-lg); border-bottom: 1.5px solid var(--ink);
  }
  .nav.open { display: flex; }
  .nav a.active { box-shadow: inset -3px 0 0 var(--blue); background: var(--blue-50); }
  .nav-user { margin: .6rem 0 0; padding-top: .75rem; border-top: 1px dashed var(--line); }
  .menu-pop { inset-inline-end: auto; inset-inline-start: 0; }
}

/* ---------- الأزرار ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .7rem 1.3rem; border-radius: 10px; border: 1.5px solid transparent;
  font: inherit; font-weight: 600; font-size: .96rem; cursor: pointer; line-height: 1.3;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(2px); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }
/* الزرّ الرئيسيّ: حبر كحليّ بظلّ «مفتاح» يُضغط */
.btn-primary { background: var(--ink); color: #fff; box-shadow: 0 3px 0 #070d1f; }
.btn-primary:hover { background: #22305a; color: #fff; box-shadow: 0 4px 0 #070d1f; }
.btn-primary:active { box-shadow: 0 1px 0 #070d1f; }
.btn-navy { background: var(--blue); color: #fff; box-shadow: 0 3px 0 var(--blue-700); }
.btn-navy:hover { background: var(--blue-600); color: #fff; box-shadow: 0 4px 0 var(--blue-700); }
.btn-navy:active { box-shadow: 0 1px 0 var(--blue-700); }
.btn-teal { background: var(--blue); color: #fff; box-shadow: 0 3px 0 var(--blue-700); }
.btn-teal:hover { background: var(--blue-600); color: #fff; }
.btn-outline { background: #fff; color: var(--ink); border-color: var(--ink); }
.btn-outline:hover { background: var(--marker-soft); color: var(--ink); }
.btn-ghost { background: transparent; color: var(--blue); }
.btn-ghost:hover { background: var(--blue-50); }
.btn-light { background: #fff; color: var(--ink); border-color: var(--ink); }
.btn-light:hover { background: var(--marker-soft); color: var(--ink); }
.btn-glass { background: rgba(255, 255, 255, .1); color: #fff; border-color: rgba(255, 255, 255, .45); }
.btn-glass:hover { background: rgba(255, 255, 255, .2); color: #fff; }
.btn-danger { background: var(--rose-50); color: var(--rose); border-color: #f3c4bf; }
.btn-danger:hover { background: var(--rose); color: #fff; }
.btn-sm { padding: .45rem .9rem; font-size: .86rem; border-radius: 8px; }
.btn-lg { padding: .9rem 1.7rem; font-size: 1.05rem; }
.btn-block { width: 100%; white-space: normal; text-align: center; }

/* ---------- البطاقات ---------- */
.card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  border: 1px solid var(--line); padding: 1.5rem;
}
/* بطاقة قابلة للنقر: تُرفع كورقة ملصقة بظلّ حبر */
.card-hover { transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease); }
.card-hover:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-hard); border-color: var(--ink); }
.card h3 { margin-bottom: .35rem; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.card-head h2, .card-head h3 { margin: 0; }

.icon-tile {
  width: 46px; height: 46px; border-radius: 10px; display: grid; place-items: center; flex: none;
  background: var(--blue-50); color: var(--blue); border: 1px solid var(--blue-100);
}
.icon-tile.teal { background: var(--green-50); color: var(--green); border-color: var(--teal-100); }
.icon-tile.navy { background: var(--blue-100); color: var(--blue-700); }
.icon-tile.amber { background: var(--marker-soft); color: var(--marker-ink); border-color: #f0dc8e; }
.icon-tile svg { width: 22px; height: 22px; }

.badge {
  display: inline-flex; align-items: center; gap: .35rem; padding: .15rem .6rem; border-radius: 6px;
  font-size: .8rem; font-weight: 600; background: var(--blue-50); color: var(--blue-700); white-space: nowrap;
}
.badge.teal, .badge.green { background: var(--green-50); color: var(--teal-600); }
.badge.amber { background: var(--marker-soft); color: var(--marker-ink); }
.badge.rose { background: var(--rose-50); color: var(--rose); }
.badge.gray { background: var(--paper-2); color: var(--muted); }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; background: #c9c4b3; }
.dot.green { background: var(--green); } .dot.amber { background: var(--amber); }

.blob { display: none; }

/* ---------- عناوين الصفحات الداخلية: هامش الدفتر الأحمر ---------- */
.page-head {
  position: relative; padding-block: 2.4rem 2.6rem;
  border-bottom: 1.5px solid var(--ink);
  background: linear-gradient(180deg, rgba(251, 250, 245, 0), rgba(251, 250, 245, .7));
}
.page-head .container {
  position: relative; z-index: 1;
  padding-inline-start: 1.4rem; border-inline-start: 4px double #e3a39b;
  animation: rise .5s var(--ease) both;
}
.page-head h1 { font-size: clamp(1.6rem, 3vw, 2.3rem); margin-bottom: .4rem; }
.page-head p { margin: 0; max-width: 52em; color: var(--muted); }
.page-head .m { color: var(--ink); }
.crumbs { font-size: .85rem; color: var(--muted); margin-bottom: .7rem; display: flex; gap: .45rem; flex-wrap: wrap; }
.crumbs a { color: var(--blue); font-weight: 500; }
.overlap { margin-top: -1.6rem; position: relative; z-index: 2; }

/* حركة فقط بلا شفافية: المحتوى لا يختفي أبدًا حتّى لو تأخّر المتصفّح في تشغيل الحركة */
@keyframes rise { from { transform: translateY(12px); } to { transform: none; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ---------- الصفحة الرئيسية ---------- */
.hero2 { position: relative; padding-block: clamp(3rem, 7vw, 5.5rem) clamp(2.5rem, 5vw, 4rem); }
.hero2 .container { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero2 .container > * { animation: rise .6s var(--ease) both; }
.hero2 .container > :nth-child(2) { animation-delay: .12s; }
.hero-pill { display: inline-flex; align-items: center; gap: .55rem; color: var(--blue); font-weight: 600; font-size: .9rem; }
.hero-pill .dot { width: 8px; height: 8px; border-radius: 2px; background: var(--blue); transform: rotate(45deg); }
.hero2 h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); line-height: 1.3; margin: .9rem 0 1rem; }
.hero2 h1 .hl { white-space: nowrap; }
.hero2 .lead { font-size: 1.1rem; color: var(--muted); max-width: 32em; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: .8rem; flex-wrap: wrap; align-items: center; }
.hero-trust { display: flex; gap: 1.4rem; flex-wrap: wrap; margin-top: 1.8rem; color: var(--muted); font-size: .9rem; }
.hero-trust span { display: inline-flex; align-items: center; gap: .4rem; }
.hero-trust svg { color: var(--green); }

/* أوراق مبعثرة على المكتب: بطاقة قانون، ورقة مبدأ، وملاحظة لاصقة */
.hero-art { position: relative; min-height: 420px; }
.idx {
  position: absolute; inset-inline-start: 0; top: 0; width: min(310px, 78%); z-index: 1;
  background-color: #fff;
  background-image: repeating-linear-gradient(180deg, transparent 0 29px, #dde5f6 29px 30px);
  background-position: 0 44px;
  border: 1.5px solid var(--ink); border-radius: 8px; box-shadow: var(--shadow-hard);
  padding: .8rem 1.1rem 1rem; transform: rotate(2.5deg);
}
.idx::before { content: ""; position: absolute; inset-inline: 0; top: 42px; height: 1.5px; background: #e3a39b; }
.idx .idx-lbl { display: block; font-size: .8rem; font-weight: 600; color: var(--blue); margin-bottom: 1rem; }
.idx .idx-f { text-align: center; font-size: 1.35rem; margin: .2rem 0 .4rem; }
.idx .idx-cap { display: block; font-size: .8rem; color: var(--muted); }
.mock { position: absolute; background: #fff; border-radius: 10px; }
.mock.quiz {
  width: min(330px, 84%); inset-inline-end: 0; top: 34%; z-index: 2; padding: 1.1rem 1.2rem;
  border: 1.5px solid var(--ink); box-shadow: var(--shadow-hard); transform: rotate(-1.5deg);
}
.mock.quiz .q { font-weight: 600; color: var(--ink); margin: .6rem 0 .8rem; }
.mock .opt { display: flex; align-items: center; gap: .6rem; border: 1.5px solid var(--line); border-radius: 8px; padding: .4rem .7rem; margin-bottom: .45rem; font-size: .92rem; }
.mock .opt i { width: 24px; height: 24px; border-radius: 6px; display: grid; place-items: center; font-style: normal; font-size: .78rem; font-weight: 700; background: var(--blue-50); color: var(--blue); }
.mock .opt.ok { border-color: var(--green); background: var(--green-50); }
.mock .opt.ok i { background: var(--green); color: #fff; }
.sticky {
  position: absolute; inset-inline-start: 4%; bottom: 0; width: 180px; z-index: 3;
  background: var(--marker); color: var(--marker-ink); padding: 1rem 1.1rem 1.1rem;
  box-shadow: 0 10px 22px rgba(90, 70, 0, .18); transform: rotate(-4deg); border-radius: 2px 2px 14px 2px;
}
.sticky span { font-size: .82rem; font-weight: 500; }
.sticky b { display: block; font-size: 2rem; color: var(--ink); line-height: 1.2; font-variant-numeric: tabular-nums; }
.sticky .progress { background: rgba(107, 78, 0, .15); border: 0; }
.sticky .progress > span { background: var(--ink); }
@media (max-width: 900px) {
  .hero2 .container { grid-template-columns: 1fr; }
  .hero-art { min-height: 440px; max-width: 520px; }
}

/* شريط الأرقام: ورقة واحدة بفواصل متقطّعة */
.stats2 {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr));
  background: #fff; border: 1.5px solid var(--ink); border-radius: var(--radius); box-shadow: var(--shadow-hard);
}
.stat2 { padding: 1.15rem 1.3rem 1.25rem; border-inline-start: 1px dashed var(--line); }
.stat2:first-child { border-inline-start: 0; }
.stat2 b { display: block; font-size: 2.1rem; font-weight: 700; color: var(--ink); line-height: 1.2; }
.stat2:first-child b { color: var(--blue); }
.stat2 span { color: var(--muted); font-size: .88rem; line-height: 1.5; display: block; }
@media (max-width: 760px) {
  .stats2 { grid-template-columns: 1fr 1fr; }
  .stat2 { border-inline-start: 0; border-top: 1px dashed var(--line); }
  .stat2:nth-child(-n+2) { border-top: 0; }
  .stat2:nth-child(even) { border-inline-start: 1px dashed var(--line); }
  .stat2:last-child { grid-column: 1 / -1; }
}

/* عنوان القسم: محاذاة لبداية السطر مع رمز الفقرة § */
.sec-head { max-width: 680px; margin: 0 0 2.2rem; }
.sec-head .eyebrow { display: inline-flex; gap: .45rem; align-items: center; color: var(--blue); font-weight: 600; font-size: .9rem; margin-bottom: .4rem; }
.sec-head .eyebrow::before { content: "§"; font-family: var(--font-math); font-size: 1.1rem; }
.sec-head h2 { margin-bottom: .35rem; }
.sec-head p { color: var(--muted); margin: 0; }

.qcard {
  position: relative; border-radius: 14px; padding: 1.8rem 2rem 2rem; background: #fff;
  border: 1.5px solid var(--ink); box-shadow: var(--shadow-hard);
  display: flex; flex-direction: column;
}
.qcard .qtop { display: flex; align-items: flex-end; justify-content: space-between; gap: .6rem 1rem; margin-bottom: .6rem; flex-wrap: wrap; }
.qcard .qtop .badge { white-space: normal; }
.qnum { font-family: var(--font-math); font-size: 3.4rem; font-weight: 700; line-height: 1; color: var(--blue); }
.qcard h3 { font-size: 1.15rem; }
.qgroups { list-style: none; padding: 0; margin: 1rem 0 1.4rem; display: grid; }
.qgroups li { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .6rem 0; border-bottom: 1px dashed var(--line); font-size: .93rem; }
.qgroups li:first-child { border-top: 1px dashed var(--line); }
.qgroups li small { color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.qcard .row.between { margin-top: auto; }

/* ميزات المنصّة: شبكة غير متماثلة (بطاقات عريضة وضيّقة متناوبة) */
.bento { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.1rem; }
.feat { display: flex; flex-direction: column; gap: .9rem; color: inherit; }
.feat:hover { color: inherit; }
.feat .feat-body { display: flex; flex-direction: column; gap: .45rem; flex: 1; }
.feat h3 { margin: 0; }
.feat p { margin: 0; color: var(--muted); font-size: .95rem; max-width: 36em; }
.feat .go { margin-top: auto; padding-top: .4rem; color: var(--blue); font-weight: 600; font-size: .9rem; display: inline-flex; gap: .35rem; align-items: center; }
.feat .go svg { transition: transform .25s var(--ease); }
.feat:hover .go svg { transform: translateX(-4px); }
.feat.wide { grid-column: span 2; flex-direction: row; align-items: stretch; gap: 1.2rem; }
.feat.wide .icon-tile { width: 56px; height: 56px; }
@media (max-width: 820px) {
  .bento { grid-template-columns: 1fr; }
  .feat.wide { grid-column: auto; flex-direction: column; }
}

.chap-list { list-style: none; padding: 0; margin: 1rem 0; counter-reset: ch; display: grid; gap: .6rem; }
.chap-list li { counter-increment: ch; display: flex; gap: .8rem; align-items: flex-start; font-size: .95rem; }
.chap-list li::before { content: counter(ch); flex: none; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; border: 1.5px solid var(--ink); background: #fff; color: var(--ink); font-weight: 700; font-size: .85rem; }

/* دعوة الدخول: ورقة مثبّتة بشريط لاصق */
.cta2 {
  position: relative; border-radius: 14px; padding: clamp(1.8rem, 4vw, 2.8rem) clamp(1.5rem, 4vw, 3rem);
  background: #fff; border: 1.5px solid var(--ink); box-shadow: var(--shadow-hard);
  display: grid; grid-template-columns: minmax(0, 1.5fr) auto; gap: 1.5rem 2.5rem; align-items: center;
}
.cta2::before {
  content: ""; position: absolute; top: -13px; inset-inline-start: 12%; width: 120px; height: 26px;
  background: rgba(255, 226, 122, .85); transform: rotate(-3deg); box-shadow: 0 1px 2px rgba(0, 0, 0, .06);
}
.cta2 h2 { margin-bottom: .4rem; }
.cta2 p { max-width: 38em; margin: 0; color: var(--muted); }
@media (max-width: 760px) { .cta2 { grid-template-columns: 1fr; } }

/* ---------- صفحة النموذج: المجموعات والمواضيع ---------- */
.group { margin-bottom: 2.6rem; }
.group-head { display: flex; align-items: center; gap: .9rem; margin-bottom: 1.1rem; flex-wrap: wrap; }
.group-head h2 { font-size: 1.25rem; margin: 0; }
.group-head .line { flex: 1; height: 0; border-top: 1.5px dashed var(--line); min-width: 40px; }
.topic-card { display: flex; flex-direction: column; gap: .6rem; color: inherit; }
.topic-card:hover { color: inherit; }
.topic-card .t-top { display: flex; gap: .8rem; align-items: flex-start; }
.topic-card h3 { font-size: 1.04rem; margin: 0; }
.topic-card p { font-size: .9rem; color: var(--muted); margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.topic-card .t-foot { display: flex; align-items: center; justify-content: space-between; gap: .5rem; margin-top: auto; padding-top: .7rem; border-top: 1px dashed var(--line); font-size: .85rem; }
.num-tile {
  width: 40px; height: 40px; border-radius: 50%; flex: none; display: grid; place-items: center;
  background: #fff; border: 1.5px solid var(--blue); color: var(--blue); font-weight: 700; font-size: .95rem;
  font-variant-numeric: tabular-nums;
}
.topic-card.st-mastered .num-tile { background: var(--green); border-color: var(--green); color: #fff; }
.topic-card.st-progress .num-tile { background: var(--marker); border-color: #e2c24d; color: var(--marker-ink); }

/* ---------- شريط التقدّم ---------- */
.progress { height: 10px; background: var(--paper-2); border: 1px solid var(--line); border-radius: 99px; overflow: hidden; }
.progress > span { display: block; height: 100%; border-radius: 99px; background: var(--blue); transition: width .6s var(--ease); }
.progress.navy > span { background: var(--ink); }
.progress.lg { height: 12px; }
.ring { width: 118px; height: 118px; position: relative; flex: none; }
.ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring .val { position: absolute; inset: 0; display: grid; place-items: center; font-weight: 700; font-size: 1.5rem; color: var(--ink); font-variant-numeric: tabular-nums; }

/* ---------- صفحة الموضوع ---------- */
.topic-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 1.5rem; align-items: start; }
@media (max-width: 960px) { .topic-layout { grid-template-columns: 1fr; } }
.side-sticky { position: sticky; top: 90px; }
.tabs { display: flex; gap: .25rem; background: #fff; border: 1.5px solid var(--ink); padding: .3rem; border-radius: 12px; overflow-x: auto; margin-bottom: 1.2rem; }
.tabs button {
  flex: 1; min-width: max-content; background: none; border: 0; font: inherit; font-weight: 600; font-size: .95rem;
  color: var(--muted); padding: .55rem 1.1rem; border-radius: 8px; cursor: pointer; display: inline-flex; gap: .45rem; align-items: center; justify-content: center;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.tabs button:hover { color: var(--ink); background: var(--marker-soft); }
.tabs button.active { background: var(--ink); color: #fff; }
/* أفكار رئيسية: أسطر مسطّرة كالدفتر */
.key-list { list-style: none; padding: 0; margin: 0; display: grid; }
.key-list li { position: relative; padding: .75rem 0; padding-inline-start: 1.9rem; border-bottom: 1px dashed var(--line); }
.key-list li:last-child { border-bottom: 0; }
.key-list li::before {
  content: ""; position: absolute; inset-inline-start: .2rem; top: 1.3rem; width: 10px; height: 10px; border-radius: 50%;
  border: 2.5px solid var(--blue); background: #fff;
}
/* القوانين: بطاقة فهرسة صفراء */
.formula-box { background: #fffdf2; border: 1px solid #ecdfa6; border-radius: 10px; padding: 1rem 1.3rem; display: grid; gap: .6rem; }
.formula-box .m { color: var(--ink); font-size: 1.14em; }
.formula-box .f-row { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: center; border-bottom: 1px dashed #e6d89c; padding-bottom: .55rem; }
.formula-box .f-row:last-child { border-bottom: 0; padding-bottom: 0; }
.formula-box .f-row span.lbl { color: var(--muted); font-size: .9rem; font-weight: 500; }
.example { border: 1.5px dashed var(--blue); background: #fff; border-radius: 12px; padding: 1.2rem 1.4rem; }
.example .q { font-weight: 600; color: var(--ink); }
.example ol { margin: .6rem 0 0; padding-inline-start: 1.3rem; }
.example ol li { margin-bottom: .35rem; }
.example ol li::marker { color: var(--blue); font-weight: 700; }
.answer-line { margin-top: .7rem; padding: .3rem .8rem; background: var(--marker); border-radius: 4px; font-weight: 600; color: var(--ink); display: inline-block; }

.video-wrap { position: relative; padding-top: 56.25%; border-radius: 12px; overflow: hidden; background: var(--ink); border: 1.5px solid var(--ink); }
.video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-empty { border: 1.5px dashed #bdb7a2; border-radius: 12px; padding: 2.2rem 1.5rem; text-align: center; background: #fff; }
.video-empty .icon-tile { margin: 0 auto 1rem; width: 62px; height: 62px; border-radius: 14px; }

/* ---------- المبدأ ---------- */
.quiz-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.quiz-q { font-size: 1.14rem; font-weight: 600; color: var(--ink); margin-bottom: 1rem; }
.options { display: grid; gap: .6rem; }
.option {
  display: flex; gap: .8rem; align-items: center; width: 100%; text-align: start; font: inherit; color: var(--text);
  background: #fff; border: 1.5px solid var(--line); border-radius: 10px; padding: .8rem 1rem; cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.option:hover:not(:disabled) { border-color: var(--ink); background: #fffdf2; transform: translateX(-3px); }
.option:active:not(:disabled) { transform: translateX(-3px) scale(.99); }
.option .letter {
  width: 32px; height: 32px; border-radius: 8px; flex: none; display: grid; place-items: center;
  background: var(--blue-50); color: var(--blue); font-weight: 700; font-size: .9rem;
}
.option.selected { border-color: var(--blue); background: var(--blue-50); }
.option.correct { border-color: var(--green); background: var(--green-50); }
.option.correct .letter { background: var(--green); color: #fff; }
.option.wrong { border-color: var(--rose); background: var(--rose-50); }
.option.wrong .letter { background: var(--rose); color: #fff; }
.option:disabled { cursor: default; }
.feedback { margin-top: 1rem; padding: .9rem 1.1rem; border-radius: 10px; font-size: .96rem; border: 1px solid transparent; }
.feedback.ok { background: var(--green-50); color: #0e5237; border-color: var(--teal-100); }
.feedback.no { background: var(--rose-50); color: #8f201a; border-color: #f3c4bf; }
.q-dots { display: flex; gap: .3rem; }
.q-dots span { width: 24px; height: 8px; border-radius: 2px; background: var(--paper-2); border: 1px solid var(--line); }
.q-dots span.now { background: var(--ink); border-color: var(--ink); }
.q-dots span.ok { background: var(--green); border-color: var(--green); }
.q-dots span.no { background: var(--rose); border-color: var(--rose); }
.result-box { text-align: center; padding: 1.5rem 1rem; }
.result-box .score { font-size: 3rem; font-weight: 700; color: var(--ink); line-height: 1.1; }

/* ---------- لوحات المتابعة ---------- */
.kpi { display: flex; gap: 1rem; align-items: center; }
.kpi b { display: block; font-size: 1.75rem; color: var(--ink); line-height: 1.2; }
.kpi b small { font-size: .9rem; color: var(--muted); font-weight: 500; }
.kpi span { font-size: .88rem; color: var(--muted); }
.list-plain { list-style: none; padding: 0; margin: 0; }
.list-plain li { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .75rem 0; border-bottom: 1px dashed var(--line); }
.list-plain li:last-child { border-bottom: 0; }
.chart-box svg { width: 100%; height: auto; display: block; }
.bar-row { display: grid; grid-template-columns: minmax(120px, 240px) 1fr 48px; gap: .8rem; align-items: center; margin-bottom: .7rem; font-size: .92rem; }
.bar-row .progress { height: 10px; }
@media (max-width: 560px) { .bar-row { grid-template-columns: 1fr 44px; } .bar-row .progress { grid-column: 1 / -1; grid-row: 2; } }
.empty-state { text-align: center; padding: 2rem 1rem; color: var(--muted); }
.chart-box .empty-state svg { width: 40px; height: 40px; color: var(--blue); opacity: .6; }
.heat-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.heat-cell {
  width: 42px; height: 42px; border-radius: 8px; display: grid; place-items: center; font-size: .85rem; font-weight: 700;
  color: var(--muted); background: var(--paper-2); border: 1px solid var(--line); font-variant-numeric: tabular-nums;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.heat-cell:hover { transform: translate(-2px, -2px); box-shadow: 3px 3px 0 var(--ink); color: var(--ink); }
.heat-cell.s-progress { background: var(--marker); border-color: #e2c24d; color: var(--marker-ink); }
.heat-cell.s-mastered { background: var(--green); border-color: var(--green); color: #fff; }
.legend { display: flex; gap: 1rem; flex-wrap: wrap; font-size: .82rem; color: var(--muted); }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-inline-end: .35rem; vertical-align: -1px; }
.greet { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; flex-wrap: wrap; }

/* ---------- الجداول ---------- */
.table-wrap { overflow-x: auto; border-radius: 10px; border: 1px solid var(--line); background: #fff; }
table.table { width: 100%; border-collapse: collapse; font-size: .94rem; font-variant-numeric: tabular-nums; }
.table th, .table td { padding: .8rem 1rem; text-align: start; border-bottom: 1px solid var(--line); white-space: nowrap; }
.table th { background: #faf8f0; color: var(--muted); font-weight: 600; font-size: .85rem; border-bottom: 1.5px solid var(--ink); }
.table tr:last-child td { border-bottom: 0; }
.table tbody tr:hover { background: #fffdf2; }
.heat { display: inline-block; min-width: 48px; text-align: center; padding: .15rem .5rem; border-radius: 6px; font-weight: 600; font-size: .85rem; }

/* ---------- النماذج (Forms) ---------- */
.form { display: grid; gap: 1rem; }
.field label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: .35rem; color: var(--ink); }
.field .hint { font-size: .8rem; color: var(--muted); margin-top: .25rem; }
.input, select.input, textarea.input {
  width: 100%; font: inherit; padding: .72rem 1rem; border-radius: 10px; border: 1.5px solid var(--line);
  background: #fff; color: var(--text); transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.input:hover { border-color: #bdb7a2; }
.input:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 4px rgba(31, 79, 209, .14); }
.input.ltr { direction: ltr; text-align: left; }
textarea.input { min-height: 110px; resize: vertical; }
.form-row { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.alert { padding: .85rem 1.1rem; border-radius: 10px; font-size: .94rem; border: 1px solid transparent; }
.alert.info { background: var(--blue-50); color: var(--blue-700); border-color: var(--blue-100); }
.alert.warn { background: var(--marker-soft); color: var(--marker-ink); border-color: #f0dc8e; }
.alert.error { background: var(--rose-50); color: #8f201a; border-color: #f3c4bf; }
.alert.success { background: var(--green-50); color: #0e5237; border-color: var(--teal-100); }

/* ---------- صفحة الدخول: لوح «مخطّط أزرق» ---------- */
.auth-page { min-height: calc(100dvh - 68px); display: grid; grid-template-columns: 1fr 1fr; }
.auth-side {
  position: relative; overflow: hidden; color: #cfd7ec;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(255, 255, 255, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .06) 1px, transparent 1px);
  background-size: 24px 24px;
  padding: 3.5rem; display: flex; flex-direction: column; justify-content: center;
}
.auth-side > * { position: relative; z-index: 1; max-width: 30em; }
.auth-side h2 { color: #fff; font-size: 2rem; }
.auth-side::after {
  content: "f′(x)"; position: absolute; inset-inline-end: -1rem; bottom: -2.5rem; direction: ltr;
  font-family: var(--font-math); font-size: 10rem; line-height: 1; color: rgba(255, 255, 255, .06); pointer-events: none;
}
.auth-side .key-list li { border-bottom-color: rgba(255, 255, 255, .14); color: #fff; }
.auth-side .key-list li::before { border-color: var(--marker); background: transparent; }
.auth-main { display: grid; place-items: center; padding: 2.5rem 1.25rem; }
.auth-card { width: min(440px, 100%); border: 1.5px solid var(--ink); box-shadow: var(--shadow-hard); }
.role-switch { display: grid; grid-template-columns: 1fr 1fr; background: var(--paper-2); border-radius: 12px; padding: .3rem; margin-bottom: 1.4rem; border: 1px solid var(--line); }
.role-switch button { border: 1.5px solid transparent; background: none; font: inherit; font-weight: 600; padding: .6rem; border-radius: 9px; cursor: pointer; color: var(--muted); display: flex; gap: .5rem; align-items: center; justify-content: center; transition: background .2s var(--ease), color .2s var(--ease); }
.role-switch button:hover { color: var(--ink); }
.role-switch button.active { background: #fff; color: var(--ink); border-color: var(--ink); }
.pw-wrap { position: relative; }
.pw-wrap .input { padding-inline-end: 3rem; }
.pw-wrap button { position: absolute; inset-inline-end: .5rem; top: 50%; transform: translateY(-50%); background: none; border: 0; cursor: pointer; color: var(--muted); padding: .3rem; }
@media (max-width: 860px) { .auth-page { grid-template-columns: 1fr; } .auth-side { display: none; } }

/* ---------- بنك الامتحانات ---------- */
.filters { display: flex; gap: .5rem; flex-wrap: wrap; }
.chip-btn {
  border: 1.5px solid var(--line); background: #fff; font: inherit; font-size: .9rem; font-weight: 600; color: var(--muted);
  padding: .4rem 1rem; border-radius: 8px; cursor: pointer; transition: all .2s var(--ease);
}
.chip-btn:hover { border-color: var(--ink); color: var(--ink); }
.chip-btn.active { background: var(--ink); border-color: var(--ink); color: #fff; }
.exam-card { display: flex; flex-direction: column; gap: .7rem; }
.exam-card .meta { display: flex; gap: .4rem; flex-wrap: wrap; }
.exam-q { margin-bottom: 1.4rem; }
.exam-q .q-title { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: .6rem; }
.exam-q .q-title h3 { margin: 0; }
.parts { list-style: none; padding: 0; margin: .8rem 0 0; counter-reset: p; display: grid; gap: .55rem; }
.parts > li { position: relative; padding-inline-start: 2.2rem; }
.parts > li::before {
  counter-increment: p; content: "(" counter(p) ")"; position: absolute; inset-inline-start: 0; top: 0;
  font-weight: 700; color: var(--blue);
}
.parts.lettered > li::before { content: attr(data-l) "."; }
.chapter-title {
  font-size: 1.15rem; margin: 2.2rem 0 1.1rem; display: inline-block; color: var(--ink);
  background: linear-gradient(transparent 55%, var(--marker) 55%, var(--marker) 92%, transparent 92%); padding-inline: .15em;
}
.short-item { border-top: 1px dashed var(--line); padding-top: 1rem; margin-top: 1rem; }
.short-item h4 { color: var(--blue-700); margin-bottom: .3rem; }
.solution { margin-top: 1rem; border-top: 2px dashed var(--teal-100); padding-top: 1rem; }
.solution h4 { color: var(--teal-600); font-size: 1rem; margin-bottom: .5rem; }
.solution .part-sol { background: var(--green-50); border-radius: 10px; padding: .9rem 1.1rem; margin-bottom: .7rem; }
.solution .part-sol b.pl { color: var(--blue-700); }
.self-grade { display: flex; gap: .4rem; flex-wrap: wrap; align-items: center; margin-top: .8rem; font-size: .9rem; }
.timer { font-family: var(--font-math); font-size: 1.5rem; font-weight: 700; color: var(--ink); direction: ltr; background: var(--marker); padding: .05rem .9rem; border-radius: 6px; }
.figure { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: .6rem; max-width: 280px; margin: .6rem 0; }

/* ---------- نافذة منبثقة وإشعارات ---------- */
.modal-back { position: fixed; inset: 0; background: rgba(22, 33, 61, .45); z-index: 100; display: grid; place-items: center; padding: 1rem; backdrop-filter: blur(3px); }
.modal { background: #fff; border-radius: 14px; width: min(720px, 100%); max-height: 88vh; overflow: auto; border: 1.5px solid var(--ink); box-shadow: var(--shadow-lg); animation: rise .25s var(--ease); }
.modal-head { display: flex; justify-content: space-between; align-items: center; padding: 1.1rem 1.4rem; border-bottom: 1px dashed var(--line); position: sticky; top: 0; background: #fff; z-index: 1; }
.modal-head h3 { margin: 0; }
.modal-body { padding: 1.4rem; }
.icon-btn { background: none; border: 0; cursor: pointer; color: var(--muted); padding: .35rem; border-radius: 8px; display: inline-grid; place-items: center; transition: background .2s var(--ease); }
.icon-btn:hover { background: var(--marker-soft); color: var(--ink); }
.toast-host { position: fixed; bottom: 1.2rem; inset-inline-start: 50%; transform: translateX(50%); z-index: 200; display: grid; gap: .5rem; }
.toast { background: var(--ink); color: #fff; padding: .7rem 1.2rem; border-radius: 10px; box-shadow: var(--shadow-lg); font-size: .94rem; animation: tin .25s var(--ease); }
.toast.ok { background: var(--green); } .toast.err { background: var(--rose); }
@keyframes tin { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- التذييل ---------- */
.footer { background: var(--paper); border-top: 1.5px solid var(--ink); color: var(--muted); padding-block: 2.8rem 1.6rem; margin-top: 3.5rem; font-size: .92rem; }
.footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2rem; }
.footer p { max-width: 34em; }
.footer h4 { color: var(--ink); font-size: 1rem; margin-bottom: .7rem; }
.footer a { color: var(--muted); display: block; padding: .15rem 0; }
.footer a:hover { color: var(--blue); }
.footer a.brand { color: var(--ink); }
.footer .base { border-top: 1px dashed var(--line); margin-top: 2rem; padding-top: 1.2rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .84rem; }
@media (max-width: 760px) { .footer .cols { grid-template-columns: 1fr; } }

/* ---------- الطباعة ---------- */
@media print {
  .topbar, .footer, .no-print, .tabs, .self-grade, .skip { display: none !important; }
  body { background: #fff; }
  .card, .qcard, .cta2 { box-shadow: none; border-color: #ccc; }
  .page-head { background: none; padding: 0 0 1rem; border: 0; }
  .page-head .container { border: 0; padding: 0; }
  .solution { display: block !important; }
}