@font-face{font-family:"Cairo";src:url(fonts/cairo-arabic.woff2) format("woff2");font-weight:200 1000;font-display:swap;unicode-range:U+0600-06FF,U+0750-077F,U+08A0-08FF,U+200C-200E,U+2010-2011,U+FB50-FDFF,U+FE70-FEFC}
@font-face{font-family:"Cairo";src:url(fonts/cairo-latin.woff2) format("woff2");font-weight:200 1000;font-display:swap;unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2212,U+2215}
:root{--ink:#14365A;--muted:#4F6070;--bg:#F7F4EC;--card:#fff;--violet:#0E746C;--orange:#E8A33A;--pink:#B83A22;--sky:#1F63A8;--green:#15803D;--teal:#0E746C;--tealdk:#0B5E58;--navy:#14365A;--coral:#D2492F;--coraldk:#B83A22;--amber:#E8A33A;--greenbg:#E8F9EE;--red:#DC2626;--redbg:#FDECEC;--r:20px;
 --g5:#B8245A;--g6:#A85406;--g7:#0E746C;--g8:#2367AB;--g9:#6E3CA3}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Cairo","Segoe UI",Tahoma,Arial,sans-serif;color:var(--ink);background-color:var(--bg);background-image:url(math-bg.svg),radial-gradient(circle at 8% 4%,#FCE7C8 0,transparent 32%),radial-gradient(circle at 96% 30%,#D6ECE8 0,transparent 30%),radial-gradient(circle at 6% 88%,#FADBD2 0,transparent 26%);background-size:600px 600px,auto,auto,auto;background-repeat:repeat,no-repeat,no-repeat,no-repeat;background-attachment:scroll,fixed,fixed,fixed;font-size:18px;line-height:1.75}
a{color:var(--violet)}
.wrap{max-width:860px;margin:0 auto;padding:12px 16px 30px}
[hidden]{display:none!important}
button{font-family:inherit;cursor:pointer}
.m{direction:ltr;unicode-bidi:isolate;font-weight:700;display:inline-block;white-space:nowrap}
.frac{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;line-height:1.05;margin:0 .1em;font-weight:800;font-size:.92em}
.frac>span{display:block;padding:0 .16em;text-align:center}
.frac>span:first-child{border-bottom:2.2px solid currentColor;padding-bottom:1px}
.frac>span:last-child{padding-top:2px}
.mixed{display:inline-flex;align-items:center;direction:ltr}.mixed>.w{font-size:1.12em;margin-left:.02em}
/* top bar */
/* header + hero */
.topbar{position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center;margin:6px 0 0;padding:14px 14px 12px;border-radius:22px;background-color:var(--navy);background-image:url(math-bg-hero.svg),linear-gradient(135deg,#14365A 0%,#0F5F66 60%,#0F6E68 100%);background-size:420px 420px,auto;box-shadow:0 8px 24px rgba(20,40,70,.18)}
.topbar a{white-space:nowrap;text-decoration:none;color:var(--navy);background:#fff;border-radius:999px;padding:3px 14px;font-weight:800;font-size:.92rem;box-shadow:0 2px 8px rgba(0,0,0,.12)}
.topbar a.brand{white-space:normal;color:#fff;background:none;box-shadow:none;padding:0;font-size:1.3rem;font-weight:900;line-height:1.45;text-shadow:0 1px 2px rgba(0,0,0,.25)}
.ttl-part{white-space:nowrap;display:inline-block}
.hero{position:relative;text-align:center;padding:26px 16px 24px;margin:8px 0 0;border-radius:28px;color:#fff;background-color:var(--navy);background-image:url(math-bg-hero.svg),linear-gradient(135deg,#14365A 0%,#0F5F66 60%,#0F6E68 100%);background-size:480px 480px,auto;box-shadow:0 10px 30px rgba(20,40,70,.22);overflow:hidden}
.hero h1{font-size:2.05rem;margin:.1em 0 .25em;font-weight:900;line-height:1.4;color:#fff;text-align:center;text-shadow:0 2px 4px rgba(0,0,0,.25)}
.hero h1:after{content:"";display:block;width:84px;height:5px;border-radius:5px;background:linear-gradient(90deg,var(--amber),var(--coral));margin:.35em auto 0}
.hero p{margin:.2em auto 0;color:#E6F2F0;max-width:580px;font-size:1.08rem}
.shapes i{width:24px;height:24px;display:block;border-radius:7px;background:var(--amber)}
.shapes i:nth-child(2){border-radius:50%;background:#F08A6F}
.shapes i:nth-child(3){background:#7FD1C4;clip-path:polygon(50% 0,100% 100%,0 100%);border-radius:0}
.shapes i:nth-child(4){background:#fff;transform:rotate(45deg) scale(.78)}
.shapes{display:flex;justify-content:center;gap:10px;margin:0 0 6px}
.grades{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:22px 0}
.grades .gcard:first-child{grid-column:1/-1;min-height:120px}
.gcard{display:block;text-decoration:none;color:#fff;border-radius:24px;padding:20px 16px 16px;min-height:150px;position:relative;overflow:hidden;box-shadow:0 8px 24px rgba(20,40,70,.16);transition:transform .1s}
.gcard:active{transform:scale(.98)}
.gcard .big{font-size:3.2rem;font-weight:900;line-height:1;display:block}
.gcard .nm{font-size:1.35rem;font-weight:900;display:block;margin-top:6px}
.gcard .ds{font-size:.9rem;opacity:.95;display:block;line-height:1.5;margin-top:4px}
.gcard:after{content:"";position:absolute;width:120px;height:120px;border-radius:50%;background:rgba(255,255,255,.16);left:-30px;bottom:-40px}
.g5{background:linear-gradient(135deg,#D0386A,#A3184A)}.g6{background:linear-gradient(135deg,#B0560A,#8F4205)}.g7{background:linear-gradient(135deg,#0F8077,#0A524D)}.g8{background:linear-gradient(135deg,#2468B5,#173F78)}.g9{background:linear-gradient(135deg,#7C45B0,#4E2477)}
.howto{background:#fff;border-radius:var(--r);padding:14px 18px;box-shadow:0 6px 24px rgba(20,54,90,.08);margin:10px 0}
.howto h2{font-size:1.1rem;margin:0 0 4px}
.howto ul{margin:0;padding:0 1.2em 0 0;color:var(--muted);font-size:1rem}
/* grade page */
.ghead{border-radius:24px;color:#fff;padding:18px 18px;margin:14px 0 6px;box-shadow:0 8px 24px rgba(20,40,70,.14)}
.ghead h1{margin:0;font-size:1.8rem;font-weight:900;line-height:1.4}
.ghead p{margin:2px 0 0;opacity:.95}
.ws{background:#fff;border-radius:var(--r);padding:16px 18px;margin:14px 0;box-shadow:0 6px 24px rgba(20,54,90,.10);border-top:6px solid var(--gc,#0E746C)}
.ws h2{margin:0 0 2px;font-size:1.3rem;line-height:1.5}
.ws .lvl{display:inline-block;font-size:.8rem;font-weight:800;color:var(--gc);background:#F1F5F4;background:color-mix(in srgb,var(--gc) 10%,#fff);border-radius:999px;padding:0 10px;margin-bottom:4px}
.ws p{margin:0 0 10px;color:var(--muted);font-size:1rem}
.ws .meta{font-size:.88rem;color:var(--muted);margin:-4px 0 10px}
.btns{display:flex;flex-wrap:wrap;gap:10px}
.b{display:inline-flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;font-weight:800;border-radius:14px;padding:10px 18px;min-height:48px;font-size:1.05rem;flex:1 1 150px}
.b.pdf{background:#E9F3F1;color:#0B5E58;border:2px solid #9CCBC4}
.b.play{background:linear-gradient(90deg,#C8452B,#A8341D);color:#fff;box-shadow:0 4px 0 #7E2614}
.b svg{width:20px;height:20px}
footer{text-align:center;color:var(--muted);font-size:.92rem;padding:26px 0 18px}
/* ---- interactive ---- */
.card{background:var(--card);border-radius:var(--r);padding:16px 18px;box-shadow:0 6px 24px rgba(20,54,90,.10);margin:14px 0}
.lbl{font-weight:800;font-size:1.15rem;display:block;margin-bottom:6px}
.name-input{width:100%;font:inherit;font-size:1.3rem;padding:12px 16px;border:3px solid #C3DCD8;border-radius:16px;outline:none;background:#FAFCFB}
.name-input:focus{border-color:var(--violet)}
.err{color:var(--red);font-weight:700;margin:6px 0 0}
.btn{display:block;width:100%;font-size:1.22rem;font-weight:800;border:0;border-radius:16px;padding:12px 18px;min-height:56px;margin-top:14px}
.btn-main{background:linear-gradient(90deg,#C8452B,#A8341D);color:#fff;box-shadow:0 5px 0 #7E2614}
.btn-soft{background:#E7F1F0;color:var(--tealdk)}
.btn-link{background:none;border:0;color:var(--muted);font-weight:700;font-size:.95rem;text-decoration:underline;padding:10px 4px;display:block;margin:6px auto 0}
.rules{margin:12px 0 0;padding:0 1.2em 0 0;color:var(--muted);font-size:1rem}
.ptitle{text-align:center;margin:14px 0 0}
.ptitle h1{font-size:1.75rem;margin:0;font-weight:900;line-height:1.4}
.ptitle .k{color:var(--violet);font-weight:800;margin:0}
.sticky{position:sticky;top:0;z-index:5;background:rgba(247,244,236,.95);backdrop-filter:blur(6px);padding:8px 0 8px;margin:0 -2px}
.prow{display:flex;align-items:center;gap:10px;font-weight:700;font-size:.95rem}
.ptrack{flex:1;height:14px;border-radius:999px;background:#DDEBE8;overflow:hidden}
#pbar{height:100%;width:0;background:linear-gradient(90deg,var(--amber),var(--coral),var(--teal));border-radius:999px;transition:width .3s}
.remind summary{display:flex;justify-content:space-between;align-items:center;cursor:pointer;list-style:none}
.remind summary::-webkit-details-marker{display:none}
.remind h2{margin:0;font-size:1.2rem;color:var(--violet)}
.remind .tog{font-size:.85rem;color:var(--muted)}
.remind p{margin:6px 0}
.fig{max-width:100%;height:auto;display:block;margin:6px auto}
.fig.bar{max-width:520px;width:100%}
.figbox{display:flex;justify-content:center;margin:4px 0 6px}
.figbox svg{width:auto;max-width:min(100%,300px);height:auto}
.figbox svg.bar{max-width:100%;width:100%}
.remind svg.bar{width:100%;max-width:520px}
.sec-head{color:#fff;font-weight:900;font-size:1.12rem;border-radius:14px;padding:6px 14px;margin:22px 0 2px;display:inline-block}
.c0{background:var(--coraldk)}.c1{background:var(--sky)}.c2{background:var(--teal)}.c3{background:#3E3A8C}
.sec-note{margin:4px 2px 0;color:var(--muted);font-size:1rem}
.qcard{border:3px solid transparent;transition:border-color .2s,background .2s}
.qcard.ok{border-color:#86EFAC;background:var(--greenbg)}
.qcard.shown{border-color:#FCD34D;background:#FFFBEB}
.qhead{display:flex;align-items:center;gap:8px;margin-bottom:4px}
.qnum{color:#fff;font-weight:900;min-width:36px;height:36px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;font-size:1.05rem}
.badge{background:#FEF3C7;color:#B45309;font-weight:800;border-radius:999px;padding:0 10px;font-size:.85rem}
.qstate{margin-inline-start:auto;font-weight:800;font-size:.92rem;color:var(--green)}
.qcard.shown .qstate{color:#B45309}
.qtext{font-size:1.1rem;margin:2px 0 6px}
.eline{font-size:1.25rem;margin:4px 0}
.tline{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:1.3rem;direction:ltr;justify-content:flex-end;margin:6px 0}
.tline .m{white-space:pre}
.part{margin:8px 0}
.part-q{margin:0 0 4px}
.ansrow{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:4px 0}
.ansrow .pre{font-weight:800}
.rows{display:flex;gap:14px;flex-wrap:wrap}
.unit{font-weight:700;color:var(--muted)}
.ans{font:inherit;font-weight:800;font-size:1.25rem;width:8.2em;max-width:62vw;padding:6px 10px;border:3px solid #C3DCD8;border-radius:14px;outline:none;text-align:center;background:#FAFCFB;min-height:50px;direction:ltr}
.tline .ans{width:4.6em}
.ans:focus{border-color:var(--violet)}
.ans.good{border-color:#22C55E;background:#F0FDF4;color:#15803D}
.ans.bad{border-color:var(--red);background:var(--redbg)}
.ans:disabled{opacity:1;-webkit-text-fill-color:currentColor}
.tblwrap{overflow-x:auto}
table.vt{border-collapse:collapse;margin:6px auto;direction:ltr}
table.vt th,table.vt td{border:2px solid #B9D3CF;padding:4px 6px;text-align:center;min-width:58px;font-weight:800}
table.vt th{background:#EAF3F1}
.ans.tcell{width:3.6em;min-height:44px;font-size:1.1rem;padding:4px}
.keys{display:flex;gap:8px;margin:6px 0 0;justify-content:flex-start}
.kbtn{min-width:52px;min-height:42px;border-radius:12px;border:2px solid #C3DCD8;background:#fff;font-weight:900;font-size:1.15rem;color:var(--violet)}
.kbtn:disabled{opacity:.4}
.actions{display:flex;gap:10px;align-items:center;margin-top:10px;flex-wrap:wrap}
.check{background:var(--green);color:#fff;border:0;border-radius:14px;font-weight:900;font-size:1.15rem;padding:8px 26px;min-height:50px;box-shadow:0 4px 0 #15803D}
.check:disabled{opacity:.45;box-shadow:none}
.solbtn{background:none;border:0;color:var(--muted);text-decoration:underline;font-weight:700;font-size:.95rem;padding:8px}
.fb{font-weight:800;margin:10px 0 4px;border-radius:12px;padding:8px 12px}
.fb.good{background:#DCFCE7;color:#15803D}.fb.bad{background:var(--redbg);color:var(--red)}.fb.warn{background:#FEF3C7;color:#92400E}
.hint{background:#EFF6FF;border-radius:12px;padding:8px 12px;color:#1E3A8A;margin:6px 0}
.sol{background:#fff;border:2px dashed #FCD34D;border-radius:14px;padding:8px 14px;margin-top:8px}
.sol .st{font-weight:900;color:#B45309}.sol p{margin:4px 0}.sol .final{font-weight:800;color:#15803D}
.inote{background:#EFF6FF;border-radius:14px;padding:8px 14px;color:#1E3A8A;font-weight:700;margin:12px 0}
.result{text-align:center}
.result h2{font-size:1.6rem;margin:6px 0}
#rscore{font-size:1.4rem;font-weight:800}
#rscore b{color:var(--violet);font-size:1.6em}
@media (min-width:700px){ .hero h1{font-size:2.6rem} .topbar{padding:16px 150px} .topbar a.brand{font-size:1.5rem} .topbar a:not(.brand){position:absolute;inset-inline-start:16px;top:50%;transform:translateY(-50%)} .grades{grid-template-columns:repeat(3,1fr)} .grades .gcard:first-child{grid-column:auto;min-height:190px} .gcard{min-height:190px} }
@media (max-width:380px){ .grades{gap:10px} .gcard .big{font-size:2.6rem} }

.xhead{font-size:1.25rem;margin:26px 4px 0;color:var(--ink)}
.xhead.first{margin-top:16px}
.tindex{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 4px}
.tindex a{background:#fff;border-radius:999px;padding:4px 14px;text-decoration:none;font-weight:700;font-size:.95rem;color:var(--ink);box-shadow:0 2px 10px rgba(20,54,90,.08)}
.topic{scroll-margin-top:10px}
.topic .xhead{border-inline-start:6px solid var(--amber);padding-inline-start:10px}
.ws.exam{border-top-style:dashed}
.ws.vid video{width:100%;border-radius:14px;background:#000;display:block;margin-top:6px;aspect-ratio:16/9}

.b.ans-b{background:#FDEEE9;color:#9E321C;border:2px solid #F2B8A8}
.b.word{background:#EAF0F8;color:#1F4E8A;border:2px solid #B5C8E2}
.btns .b{flex:1 1 120px}
.gcard .gimg{display:block;width:100%;max-width:230px;height:auto;aspect-ratio:200/110;margin:0 auto 10px;position:relative;z-index:1}
.gcard .big,.gcard .nm,.gcard .ds{position:relative;z-index:1}
.gpage .topic .xhead{border-inline-start-color:var(--gc)}
.gpage .tindex a{border:2px solid color-mix(in srgb,var(--gc) 35%,#fff)}
.gpage .ghead{box-shadow:0 8px 24px color-mix(in srgb,var(--gc) 35%,transparent)}

/* her request 2026-11-03 22:16: exams last on every grade page, under one big heading */
.gpage .topic.exams{margin-top:44px;padding-top:14px;border-top:3px solid var(--gc,#A85406)}
.gpage .topic.exams .xhead,.topic.exams .xhead{font-size:2rem;font-weight:800;text-align:center;border-inline-start:none;padding-inline-start:0;margin:8px 4px 14px;letter-spacing:0}

/* ===== تطبيقات تفاعليّة: قسم بارز ===== */
.apps{margin:22px 0 28px;padding:20px 18px 24px;border-radius:22px;background:linear-gradient(135deg,#FFF7ED,#FDF2F8 55%,#EEF2FF);border:3px solid #F59E0B;box-shadow:0 8px 24px rgba(0,0,0,.08)}
.apps-h{font-size:2.5rem;font-weight:900;line-height:1.2;margin:0 0 16px;text-align:center;color:#B45309;letter-spacing:0}
.apps-h::before{content:"🎮 "}
.apps-h3{font-size:1.6rem;font-weight:800;margin:24px 0 12px;text-align:center;color:#334155}
.agrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.acard{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:6px;min-height:170px;padding:18px 14px;border-radius:20px;background:var(--ac);color:#fff;text-decoration:none;box-shadow:0 6px 0 rgba(0,0,0,.18);transition:transform .12s}
.acard:hover,.acard:focus{transform:translateY(-3px)}
.acard:active{transform:translateY(2px);box-shadow:0 2px 0 rgba(0,0,0,.18)}
.acard .aic{font-size:3.2rem;line-height:1}
.acard .att{font-size:1.45rem;font-weight:800;line-height:1.3}
.acard .agr{font-size:1.05rem;opacity:.95}
.acard .ago{margin-top:4px;font-size:1.15rem;font-weight:800;background:rgba(255,255,255,.25);padding:6px 16px;border-radius:999px}
.agrid.sm .acard{min-height:130px}
.agrid.sm .acard .aic{font-size:2.4rem}
.agrid.sm .acard .att{font-size:1.3rem}
@media (max-width:600px){.apps{padding:16px 12px 18px}.apps-h{font-size:1.95rem}.apps-h3{font-size:1.4rem}.agrid{grid-template-columns:1fr 1fr;gap:10px}.acard{min-height:150px;padding:14px 8px}.acard .aic{font-size:2.6rem}.acard .att{font-size:1.3rem}.acard .agr{font-size:.95rem}}
@media (max-width:380px){.agrid{grid-template-columns:1fr}}
@media print{.apps{display:none}}

/* عنوان كبير يجمع مواضيع (مثل «الهندسة») */
.gpage .grouph{font-size:2rem;font-weight:800;text-align:center;margin:44px 4px 10px;padding-top:14px;border-top:3px solid var(--gc,#A85406);letter-spacing:0}
@media (max-width:600px){.gpage .grouph{font-size:1.7rem}}

/* 2026-11-04: sixth class «التاسع – 5 وحدات» — 6 cards: 2 per row on phones, 3 per row on wide screens */
.grades .gcard:first-child{grid-column:auto}
.g95{background:linear-gradient(135deg,#9C3A8C,#5E1A55)}
.gcard .nm .un{display:table;font-size:.95rem;font-weight:800;background:rgba(255,255,255,.22);border-radius:999px;padding:2px 12px;margin-top:6px}