/* ===========================================================
   Cisimlerin Dayanımı — Sıfırdan Sınava Hazırlık
   Tek dosya, harici bağımlılık yok (MathJax hariç).
   =========================================================== */

:root{
  --bg:#eef2f9;
  --bg-soft:#f7f9fd;
  --card:#ffffff;
  --ink:#1f2937;
  --ink-soft:#475569;
  --muted:#64748b;
  --line:#e2e8f0;
  --primary:#1d4ed8;
  --primary-dark:#1e3a8a;
  --primary-soft:#dbeafe;
  --accent:#f59e0b;
  --accent-dark:#b45309;
  --accent-soft:#fef3c7;
  --green:#16a34a;
  --green-soft:#dcfce7;
  --red:#dc2626;
  --red-soft:#fee2e2;
  --shadow:0 1px 2px rgba(15,23,42,.06),0 8px 24px rgba(15,23,42,.06);
  --shadow-lg:0 12px 40px rgba(15,23,42,.12);
  --radius:16px;
  --radius-sm:10px;
  --maxw:1140px;
  --font:'Segoe UI',system-ui,-apple-system,'Inter',Roboto,Arial,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);background:var(--bg);color:var(--ink);
  line-height:1.65;font-size:16.5px;-webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
h1,h2,h3,h4{line-height:1.25;color:var(--primary-dark);margin:0 0 .5em}
h2{font-size:1.7rem;margin-top:.2em}
h3{font-size:1.25rem}
p{margin:0 0 1em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.small{font-size:.9rem}
.muted{color:var(--muted)}
.center{text-align:center}

/* ---------- Top Bar ---------- */
header.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{display:flex;align-items:center;gap:14px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--primary-dark);font-size:1.12rem;white-space:nowrap}
.brand .logo{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));font-size:1.2rem;box-shadow:var(--shadow);
}
.brand small{display:block;font-weight:500;color:var(--muted);font-size:.72rem;letter-spacing:.3px}
nav.mainnav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
nav.mainnav a{
  padding:8px 13px;border-radius:9px;color:var(--ink-soft);font-weight:600;font-size:.95rem;
}
nav.mainnav a:hover{background:var(--primary-soft);color:var(--primary-dark);text-decoration:none}
nav.mainnav a.active{background:var(--primary);color:#fff}
.navtoggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:9px;padding:8px 11px;font-size:1.2rem;cursor:pointer}

/* ---------- Hero ---------- */
.hero{
  background:radial-gradient(1200px 400px at 80% -10%,rgba(37,99,235,.25),transparent),
             linear-gradient(135deg,var(--primary-dark),var(--primary));
  color:#fff;padding:56px 0 64px;position:relative;overflow:hidden;
}
.hero::after{content:"";position:absolute;right:-80px;bottom:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(245,158,11,.35),transparent 70%);}
.hero h1{color:#fff;font-size:2.5rem;margin-bottom:.3em;max-width:18ch}
.hero p.lead{font-size:1.18rem;color:#dbeafe;max-width:60ch;margin-bottom:1.6em}
.hero .badge-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:1.8em}
.hpill{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);padding:6px 14px;border-radius:999px;font-size:.9rem;font-weight:600}
.cta{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#3b2400;font-weight:800;
  padding:14px 26px;border-radius:12px;box-shadow:var(--shadow-lg);font-size:1.05rem;border:none;cursor:pointer}
.cta:hover{transform:translateY(-2px);text-decoration:none;color:#3b2400}
.cta.secondary{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.3);box-shadow:none}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Sections ---------- */
section.block{padding:46px 0}
.section-head{margin-bottom:26px}
.section-head .kicker{color:var(--accent-dark);font-weight:800;letter-spacing:1.5px;text-transform:uppercase;font-size:.8rem}
.section-head h2{margin:.15em 0 .1em}
.section-head p{color:var(--muted);max-width:65ch;margin:0}

/* ---------- Topic cards ---------- */
.grid{display:grid;gap:20px}
.grid.cards{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.topic-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;
  box-shadow:var(--shadow);position:relative;transition:.18s;display:flex;flex-direction:column;
}
.topic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);text-decoration:none;border-color:var(--primary-soft)}
.topic-card .tnum{position:absolute;top:16px;right:18px;font-weight:800;color:var(--line);font-size:2rem}
.topic-card .ticon{width:50px;height:50px;border-radius:12px;display:grid;place-items:center;font-size:1.6rem;margin-bottom:12px;
  background:var(--primary-soft)}
.topic-card h3{color:var(--primary-dark);margin-bottom:.35em}
.topic-card p{color:var(--ink-soft);font-size:.95rem;margin-bottom:1em}
.topic-card .tfoot{margin-top:auto;display:flex;align-items:center;gap:10px;font-weight:700;color:var(--primary);font-size:.92rem}
.topic-card .chip{font-size:.74rem;background:var(--bg-soft);border:1px solid var(--line);color:var(--muted);padding:3px 9px;border-radius:999px;font-weight:600}
.prog-mini{height:7px;border-radius:99px;background:var(--line);overflow:hidden;margin-top:12px}
.prog-mini > i{display:block;height:100%;background:linear-gradient(90deg,var(--green),#22c55e);width:0}

/* ---------- Lesson layout ---------- */
.lesson-wrap{display:grid;grid-template-columns:260px 1fr;gap:34px;align-items:start}
aside.toc{position:sticky;top:84px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
aside.toc h4{font-size:.8rem;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:10px}
aside.toc a{display:block;padding:7px 10px;border-radius:8px;color:var(--ink-soft);font-size:.93rem;font-weight:600;margin-bottom:2px}
aside.toc a:hover,aside.toc a.active{background:var(--primary-soft);color:var(--primary-dark);text-decoration:none}
.lesson-main{min-width:0}

.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted)}

.lesson-title{font-size:2rem;margin-bottom:.1em}
.lesson-kicker{color:var(--accent-dark);font-weight:800;letter-spacing:1.5px;text-transform:uppercase;font-size:.78rem}

.prose{font-size:1.05rem;color:var(--ink)}
.prose p{margin:0 0 1.1em}

.concept{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--primary);
  border-radius:var(--radius-sm);padding:18px 22px;margin:0 0 18px;box-shadow:var(--shadow)}
.concept h3{display:flex;align-items:center;gap:10px;color:var(--primary-dark)}
.concept h3 .dot{width:26px;height:26px;border-radius:8px;background:var(--primary-soft);display:grid;place-items:center;color:var(--primary);font-size:.85rem;font-weight:800}

/* ---------- Formula cards ---------- */
.formula-card{background:linear-gradient(180deg,#fff, #fbfdff);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;margin:0 0 18px;box-shadow:var(--shadow)}
.formula-card .fname{font-weight:800;color:var(--primary-dark);display:flex;align-items:center;gap:8px;margin-bottom:6px}
.formula-card .fname::before{content:"ƒ";display:grid;place-items:center;width:26px;height:26px;border-radius:7px;background:var(--accent-soft);color:var(--accent-dark);font-style:italic;font-weight:800}
.formula-box{background:var(--primary-dark);color:#fff;border-radius:12px;padding:14px 18px;font-size:1.25rem;text-align:center;overflow-x:auto;margin:6px 0 12px}
.formula-box.light{background:#0f172a}
.varlist{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.varlist li{display:flex;gap:10px;align-items:baseline;font-size:.96rem}
.varlist .vsym{font-weight:800;color:var(--primary);min-width:46px;font-family:'Cambria Math',Georgia,serif}
.varlist .vunit{margin-left:auto;color:var(--muted);font-size:.85rem;background:var(--bg-soft);border:1px solid var(--line);padding:1px 8px;border-radius:999px;white-space:nowrap}
.fnote{margin-top:10px;font-size:.92rem;color:var(--accent-dark);background:var(--accent-soft);border-radius:8px;padding:8px 12px}

/* ---------- Worked examples ---------- */
.example{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin:0 0 18px;box-shadow:var(--shadow);overflow:hidden}
.example > summary{list-style:none;cursor:pointer;padding:16px 20px;display:flex;align-items:center;gap:12px;font-weight:700;color:var(--primary-dark)}
.example > summary::-webkit-details-marker{display:none}
.example > summary .extag{font-size:.72rem;background:var(--green-soft);color:var(--green);padding:3px 9px;border-radius:999px;font-weight:800}
.example > summary .chev{margin-left:auto;transition:.2s;color:var(--muted)}
.example[open] > summary .chev{transform:rotate(90deg)}
.example .exbody{padding:4px 20px 20px;border-top:1px dashed var(--line)}
.problem{font-size:1.02rem;margin:14px 0}
.gi-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:10px 0 16px}
.gi-grid .box{background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.gi-grid .box h5{margin:0 0 6px;font-size:.78rem;text-transform:uppercase;letter-spacing:.6px;color:var(--muted)}
.gi-grid .box ul{margin:0;padding-left:18px}
.gi-grid .box.find{background:var(--accent-soft);border-color:#fcd980}
.steps{counter-reset:s;list-style:none;padding:0;margin:0}
.steps li{position:relative;padding:10px 0 10px 42px;border-bottom:1px dashed var(--line)}
.steps li:last-child{border-bottom:none}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:9px;width:28px;height:28px;border-radius:50%;
  background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:800;font-size:.85rem}
.answer{margin-top:14px;background:var(--green-soft);border:1px solid #86efac;border-radius:12px;padding:14px 18px;font-weight:700;color:#14532d;display:flex;align-items:center;gap:10px}
.answer .lbl{background:var(--green);color:#fff;border-radius:8px;padding:2px 10px;font-size:.78rem}
.extip{margin-top:12px;font-size:.92rem;color:var(--accent-dark);background:var(--accent-soft);border-radius:8px;padding:8px 12px}

/* ---------- Mistakes ---------- */
.mistakes{background:var(--red-soft);border:1px solid #fca5a5;border-radius:var(--radius);padding:18px 22px;margin:22px 0}
.mistakes h3{color:#991b1b}
.mistakes ul{margin:0;padding-left:22px}
.mistakes li{margin-bottom:6px}

/* ---------- Quiz ---------- */
.quiz-head{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;box-shadow:var(--shadow);
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-bottom:20px}
.quiz-head .qmeta{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-weight:600;font-size:.92rem}
.quiz-head .qscore{margin-left:auto;font-weight:800;color:var(--primary-dark)}
.q-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin-bottom:16px;box-shadow:var(--shadow)}
.q-card .qn{display:inline-block;background:var(--primary-soft);color:var(--primary-dark);font-weight:800;border-radius:8px;padding:2px 10px;font-size:.82rem;margin-bottom:8px}
.q-card .qtopic{float:right;font-size:.74rem;color:var(--muted);background:var(--bg-soft);border:1px solid var(--line);padding:2px 9px;border-radius:999px}
.q-card .qtext{font-size:1.06rem;font-weight:600;margin:4px 0 14px}
.options{display:grid;gap:10px}
.option{display:flex;align-items:flex-start;gap:12px;border:1.5px solid var(--line);border-radius:12px;padding:12px 15px;cursor:pointer;transition:.12s;background:#fff}
.option:hover{border-color:var(--primary);background:var(--bg-soft)}
.option .key{width:28px;height:28px;flex:0 0 28px;border-radius:8px;border:1.5px solid var(--line);display:grid;place-items:center;font-weight:800;color:var(--muted)}
.option.selected{border-color:var(--primary);background:var(--primary-soft)}
.option.selected .key{background:var(--primary);color:#fff;border-color:var(--primary)}
.option.correct{border-color:var(--green);background:var(--green-soft)}
.option.correct .key{background:var(--green);color:#fff;border-color:var(--green)}
.option.wrong{border-color:var(--red);background:var(--red-soft)}
.option.wrong .key{background:var(--red);color:#fff;border-color:var(--red)}
.option.disabled{cursor:default;pointer-events:none}
.explain{margin-top:12px;font-size:.95rem;background:var(--bg-soft);border-left:4px solid var(--primary);border-radius:8px;padding:10px 14px;display:none}
.explain.show{display:block}
.explain b{color:var(--primary-dark)}
.btnbar{display:flex;gap:12px;flex-wrap:wrap;margin:8px 0 30px}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;border:none;border-radius:12px;
  padding:13px 24px;font-weight:800;font-size:1rem;cursor:pointer;box-shadow:var(--shadow);font-family:inherit}
.btn:hover{background:var(--primary-dark)}
.btn.ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary-soft)}
.btn.ghost:hover{background:var(--primary-soft)}
.btn.amber{background:var(--accent);color:#3b2400}
.btn.amber:hover{background:var(--accent-dark);color:#fff}
.btn:disabled{opacity:.5;cursor:not-allowed}

.result-card{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;border-radius:var(--radius);
  padding:28px;text-align:center;box-shadow:var(--shadow-lg);margin-bottom:20px;display:none}
.result-card.show{display:block}
.result-card .big{font-size:3rem;font-weight:900;line-height:1}
.result-card .ring{width:120px;height:120px;margin:0 auto 14px;border-radius:50%;display:grid;place-items:center;
  background:conic-gradient(var(--accent) var(--pct,0%),rgba(255,255,255,.18) 0)}
.result-card .ring > div{width:96px;height:96px;border-radius:50%;background:var(--primary-dark);display:grid;place-items:center}
.result-card .msg{font-size:1.15rem;margin-top:8px;color:#dbeafe}

/* ---------- Calculator ---------- */
.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.calc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.calc h3{display:flex;align-items:center;gap:10px}
.calc h3 .ci{width:34px;height:34px;border-radius:9px;background:var(--primary-soft);display:grid;place-items:center;font-size:1.1rem}
.field{margin:10px 0}
.field label{display:block;font-weight:600;font-size:.9rem;color:var(--ink-soft);margin-bottom:4px}
.field input,.field select{width:100%;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;font-size:1rem;font-family:inherit;background:#fff}
.field input:focus,.field select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.calc .out{margin-top:12px;background:var(--bg-soft);border:1px dashed var(--line);border-radius:10px;padding:12px 14px;min-height:46px;font-size:.97rem}
.calc .out .res{font-weight:800;color:var(--green);font-size:1.15rem}
.calc .out .stp{color:var(--muted);font-size:.9rem;margin-top:4px}
.hint{font-size:.84rem;color:var(--muted);margin-top:4px}

/* ---------- Callouts ---------- */
.callout{border-radius:var(--radius);padding:16px 20px;margin:18px 0;display:flex;gap:14px;align-items:flex-start}
.callout .ic{font-size:1.4rem;flex:0 0 auto}
.callout.info{background:var(--primary-soft);border:1px solid #bfdbfe;color:var(--primary-dark)}
.callout.tip{background:var(--accent-soft);border:1px solid #fcd980;color:var(--accent-dark)}
.callout.ok{background:var(--green-soft);border:1px solid #86efac;color:#14532d}

/* ---------- Pager ---------- */
.pager{display:flex;justify-content:space-between;gap:14px;margin:34px 0 10px;flex-wrap:wrap}
.pager a{flex:1;min-width:200px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 18px;box-shadow:var(--shadow)}
.pager a:hover{border-color:var(--primary);text-decoration:none}
.pager .dir{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.pager .ttl{font-weight:700;color:var(--primary-dark)}
.pager a.next{text-align:right}

/* ---------- Footer ---------- */
footer.site{background:var(--primary-dark);color:#cbd5e1;margin-top:50px;padding:34px 0}
footer.site a{color:#bfdbfe}
footer.site .fgrid{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center}
footer.site .fbrand{font-weight:800;color:#fff;font-size:1.05rem}

/* ---------- Tables ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
table.data{width:100%;border-collapse:collapse;background:#fff;min-width:520px}
table.data th,table.data td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
table.data th{background:var(--primary);color:#fff;font-weight:700;font-size:.92rem}
table.data tr:nth-child(even) td{background:var(--bg-soft)}
table.data td:first-child{font-weight:700;color:var(--primary-dark)}

/* ---------- Progress on home ---------- */
.overall{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;box-shadow:var(--shadow);
  display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.overall .ring2{width:84px;height:84px;border-radius:50%;flex:0 0 84px;display:grid;place-items:center;
  background:conic-gradient(var(--green) var(--pct,0%),var(--line) 0)}
.overall .ring2 > div{width:64px;height:64px;border-radius:50%;background:#fff;display:grid;place-items:center;font-weight:800;color:var(--primary-dark)}

/* ---------- Utility ---------- */
.tag-soft{display:inline-block;background:var(--primary-soft);color:var(--primary-dark);font-weight:700;font-size:.78rem;padding:3px 10px;border-radius:999px}
.divider{height:1px;background:var(--line);margin:30px 0;border:none}
mjx-container{overflow-x:auto;overflow-y:hidden;max-width:100%}

/* ---------- Responsive ---------- */
@media (max-width:880px){
  .lesson-wrap{grid-template-columns:1fr}
  aside.toc{position:static;display:none}
  nav.mainnav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:10px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  nav.mainnav.open{display:flex}
  nav.mainnav a{width:100%}
  .navtoggle{display:block}
  .hero h1{font-size:1.9rem}
  .gi-grid{grid-template-columns:1fr}
}
@media print{
  header.topbar,nav,.btnbar,.cta-row,footer.site,.navtoggle{display:none!important}
  .example{break-inside:avoid}
}

/* ===========================================================
   EK ÖZELLİKLER: Bilimsel Hesap Makinesi · Sınav Simülasyonu ·
   Animasyonlu Adım Adım Çözüm Oynatıcı
   =========================================================== */

/* ---------- Bilimsel Hesap Makinesi ---------- */
.scicalc{background:#0f172a;border-radius:18px;padding:16px;box-shadow:var(--shadow-lg);max-width:380px;border:1px solid #1e293b}
.scicalc .sc-disp{background:#0b1220;border:1px solid #1e293b;border-radius:12px;padding:12px 14px;text-align:right;margin-bottom:12px;min-height:74px;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden}
.scicalc .sc-expr{color:#64748b;font-size:.95rem;min-height:20px;font-family:'Cascadia Code',Consolas,monospace;word-break:break-all}
.scicalc .sc-res{color:#fff;font-size:1.9rem;font-weight:800;font-family:'Cascadia Code',Consolas,monospace;line-height:1.1;word-break:break-all}
.scicalc .sc-mode{display:flex;gap:6px;margin-bottom:10px}
.scicalc .sc-mode button{flex:0 0 auto;background:#1e293b;color:#94a3b8;border:none;border-radius:8px;padding:5px 12px;font-size:.78rem;font-weight:700;cursor:pointer}
.scicalc .sc-mode button.active{background:var(--accent);color:#3b2400}
.scicalc .sc-mode .deg-note{margin-left:auto;color:#475569;font-size:.74rem;align-self:center}
.scicalc .sc-keys{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.scicalc .sc-keys button{border:none;border-radius:11px;padding:13px 0;font-size:1.05rem;font-weight:700;cursor:pointer;background:#1e293b;color:#e2e8f0;transition:.08s;font-family:inherit}
.scicalc .sc-keys button:hover{background:#334155}
.scicalc .sc-keys button:active,.scicalc .sc-keys button.press{transform:scale(.93);background:var(--primary);color:#fff;box-shadow:0 0 0 3px rgba(37,99,235,.4)}
.scicalc .sc-keys button.fn{background:#172033;color:#7dd3fc;font-size:.92rem}
.scicalc .sc-keys button.op{background:#243043;color:#fbbf24}
.scicalc .sc-keys button.eq{background:var(--accent);color:#3b2400}
.scicalc .sc-keys button.clr{background:#3f1d1d;color:#fca5a5}
.scicalc .sc-keys button.wide{grid-column:span 2}

/* hesap makinesi modal */
.calc-fab{position:fixed;right:18px;bottom:18px;z-index:60;background:var(--primary);color:#fff;border:none;border-radius:50%;width:60px;height:60px;font-size:1.5rem;box-shadow:var(--shadow-lg);cursor:pointer}
.calc-fab:hover{background:var(--primary-dark)}
.modal-back{position:fixed;inset:0;background:rgba(15,23,42,.6);z-index:70;display:none;align-items:center;justify-content:center;padding:16px;backdrop-filter:blur(2px)}
.modal-back.open{display:flex}
.modal-box{position:relative;animation:popin .18s ease}
.modal-box .closex{position:absolute;top:-14px;right:-14px;background:#fff;border:1px solid var(--line);border-radius:50%;width:34px;height:34px;font-size:1.1rem;cursor:pointer;box-shadow:var(--shadow);z-index:2}
@keyframes popin{from{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}

/* ---------- Sınav Simülasyonu: kurulum ---------- */
.sim-setup{max-width:720px;margin:0 auto}
.sim-setup .opt-row{display:flex;gap:12px;flex-wrap:wrap;margin:10px 0 4px}
.chip-pick{border:2px solid var(--line);background:#fff;border-radius:12px;padding:12px 20px;font-weight:800;cursor:pointer;font-family:inherit;font-size:1rem;color:var(--ink)}
.chip-pick.on{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-dark)}

/* ---------- Sınav kağıdı (paper) ---------- */
.exam-layout{display:grid;grid-template-columns:1fr 300px;gap:26px;align-items:start}
.exam-paper{background:#fffdf7;border:1px solid #e7e0cf;border-radius:8px;box-shadow:0 10px 30px rgba(120,100,40,.10);padding:30px 34px;
  background-image:linear-gradient(#f1ead4 1px,transparent 1px);background-size:100% 34px;background-position:0 64px}
.exam-paper .paper-head{border-bottom:3px double #cbb78a;padding-bottom:14px;margin-bottom:20px;text-align:center;background:#fffdf7;position:relative;z-index:1}
.exam-paper .paper-head h2{color:#3a2f17;margin:0 0 4px;font-family:Georgia,'Times New Roman',serif}
.exam-paper .paper-head .pmeta{display:flex;justify-content:space-between;font-size:.86rem;color:#6b5d3a;margin-top:10px;font-family:Georgia,serif;flex-wrap:wrap;gap:8px}
.exam-paper .pq{margin:0 0 26px;font-family:Georgia,'Times New Roman',serif;color:#2a2415;position:relative;z-index:1}
.exam-paper .pq .pqn{font-weight:800;color:#1d3b6b;font-size:1.05rem}
.exam-paper .pq .pqtext{font-size:1.06rem;margin:4px 0 12px;line-height:1.7}
.exam-paper .pq .pqtopic{font-size:.72rem;color:#8a7c52;border:1px solid #d8cca3;border-radius:999px;padding:1px 8px;margin-left:6px;font-family:var(--font)}
.exam-paper .pchoices{display:grid;gap:8px;font-family:var(--font)}
.exam-paper .pchoice{display:flex;gap:11px;align-items:flex-start;padding:8px 12px;border:1.5px solid #e2dcc8;border-radius:9px;cursor:pointer;background:#fffefa;transition:.1s}
.exam-paper .pchoice:hover{border-color:var(--primary);background:#fff}
.exam-paper .pchoice .pk{width:25px;height:25px;flex:0 0 25px;border-radius:50%;border:1.5px solid #c9bd96;display:grid;place-items:center;font-weight:800;color:#6b5d3a;font-size:.85rem}
.exam-paper .pchoice.sel{border-color:var(--primary);background:var(--primary-soft)}
.exam-paper .pchoice.sel .pk{background:var(--primary);color:#fff;border-color:var(--primary)}

/* optik form */
.optik{position:sticky;top:84px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.optik .opt-timer{background:var(--primary-dark);color:#fff;padding:14px;text-align:center}
.optik .opt-timer .tt{font-size:2rem;font-weight:900;font-family:'Cascadia Code',Consolas,monospace;letter-spacing:1px}
.optik .opt-timer .tt.warn{color:#fca5a5}
.optik .opt-timer .tl{font-size:.74rem;color:#bfdbfe;text-transform:uppercase;letter-spacing:1px}
.optik .opt-body{padding:14px;max-height:48vh;overflow:auto}
.optik .opt-title{font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:8px;text-align:center}
.optik .obrow{display:grid;grid-template-columns:26px repeat(4,1fr);gap:5px;align-items:center;margin-bottom:5px}
.optik .obrow .on{font-weight:800;color:var(--muted);font-size:.82rem;text-align:center}
.optik .ob{border:1.5px solid var(--line);border-radius:50%;width:26px;height:26px;display:grid;place-items:center;font-size:.72rem;font-weight:700;color:var(--muted);cursor:pointer;margin:0 auto}
.optik .ob:hover{border-color:var(--primary)}
.optik .ob.fill{background:var(--primary-dark);color:#fff;border-color:var(--primary-dark)}
.optik .opt-foot{padding:14px;border-top:1px solid var(--line)}
.optik .opt-stat{display:flex;justify-content:space-between;font-size:.85rem;color:var(--muted);margin-bottom:10px}

/* karne (sonuç raporu) */
.karne{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-bottom:22px}
.karne .khead{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;padding:26px;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.karne .kring{width:120px;height:120px;border-radius:50%;flex:0 0 120px;display:grid;place-items:center;background:conic-gradient(var(--accent) var(--pct,0%),rgba(255,255,255,.18) 0)}
.karne .kring>div{width:96px;height:96px;border-radius:50%;background:var(--primary-dark);display:grid;place-items:center;font-size:1.6rem;font-weight:900}
.karne .kstats{display:flex;gap:22px;flex-wrap:wrap}
.karne .kstats .ks{text-align:center}
.karne .kstats .ks b{display:block;font-size:1.8rem;line-height:1}
.karne .kstats .ks span{font-size:.8rem;color:#cbd5e1}
.karne .ktopic{padding:18px 24px}
.karne .ktopic table{width:100%;border-collapse:collapse}
.karne .ktopic td,.karne .ktopic th{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;font-size:.92rem}
.karne .ktopic th{color:var(--muted);font-size:.78rem;text-transform:uppercase}
.kbar{height:9px;border-radius:99px;background:var(--line);overflow:hidden;min-width:90px}
.kbar>i{display:block;height:100%;background:linear-gradient(90deg,var(--green),#22c55e)}

.review-q{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:14px;box-shadow:var(--shadow)}
.review-q .rqh{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.review-q .badge-ok{background:var(--green-soft);color:var(--green);font-weight:800;border-radius:999px;padding:2px 10px;font-size:.78rem}
.review-q .badge-no{background:var(--red-soft);color:var(--red);font-weight:800;border-radius:999px;padding:2px 10px;font-size:.78rem}
.review-q .badge-empty{background:#e2e8f0;color:#475569;font-weight:800;border-radius:999px;padding:2px 10px;font-size:.78rem}

/* ---------- Animasyonlu Çözüm Oynatıcı ---------- */
.solver{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin:0 0 22px}
.solver .sv-head{background:linear-gradient(135deg,#0f172a,#1e293b);color:#fff;padding:16px 20px}
.solver .sv-head h3{color:#fff;margin:0 0 4px;font-size:1.12rem}
.solver .sv-head .sv-find{color:#7dd3fc;font-size:.9rem}
.solver .sv-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:0}
.solver .sv-paper{padding:22px 24px;background:#fffdf7;background-image:linear-gradient(#eef0e0 1px,transparent 1px);background-size:100% 32px;min-height:340px;border-right:1px solid var(--line)}
.solver .sv-given{font-family:Georgia,serif;color:#5b4f2f;font-size:.92rem;border-bottom:1px dashed #d8cca3;padding-bottom:10px;margin-bottom:14px}
.solver .sv-given b{color:#3a2f17}
.solver .sv-steps{display:flex;flex-direction:column;gap:16px}
.solver .sv-step{opacity:0;transform:translateY(14px);transition:opacity .5s,transform .5s}
.solver .sv-step.in{opacity:1;transform:none}
.solver .sv-step .sv-rule{display:inline-flex;align-items:center;gap:7px;background:var(--primary-soft);color:var(--primary-dark);font-weight:800;font-size:.78rem;border-radius:999px;padding:3px 12px;margin-bottom:7px}
.solver .sv-step .sv-rule .num{background:var(--primary);color:#fff;border-radius:50%;width:18px;height:18px;display:grid;place-items:center;font-size:.7rem}
.solver .sv-step .sv-say{font-size:.96rem;color:var(--ink-soft);margin:2px 0 8px}
.solver .sv-step .sv-math{background:#fff;border:1px solid #e7e0cf;border-left:4px solid var(--accent);border-radius:8px;padding:10px 16px;font-size:1.12rem;overflow-x:auto}
.solver .sv-step .sv-ruledetail{font-size:.84rem;color:var(--accent-dark);background:var(--accent-soft);border-radius:7px;padding:6px 11px;margin-top:7px;display:none}
.solver .sv-step.in .sv-ruledetail{display:block}
.solver .sv-answer{margin-top:18px;opacity:0;transition:opacity .5s}
.solver .sv-answer.in{opacity:1}
.solver .sv-answer .answer{font-family:var(--font)}
.solver .sv-side{padding:18px;background:#0f172a;display:flex;flex-direction:column;gap:12px}
.solver .sv-side .sv-side-t{color:#94a3b8;font-size:.76rem;text-transform:uppercase;letter-spacing:1px;font-weight:800;text-align:center}
.solver .sv-side .sv-calc-note{color:#7dd3fc;font-size:.86rem;text-align:center;min-height:20px}
.solver .sv-controls{display:flex;gap:8px;align-items:center;padding:14px 20px;border-top:1px solid var(--line);flex-wrap:wrap;background:var(--bg-soft)}
.solver .sv-controls .sp{margin-left:auto;display:flex;align-items:center;gap:6px;font-size:.85rem;color:var(--muted)}
.solver .sv-progress{height:6px;background:var(--line);border-radius:99px;overflow:hidden;flex:1;min-width:120px}
.solver .sv-progress>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .4s}
.btn.sm{padding:9px 16px;font-size:.9rem;border-radius:10px}

.solver-pick{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.solver-pick button{border:1.5px solid var(--line);background:#fff;border-radius:10px;padding:8px 14px;cursor:pointer;font-weight:700;font-family:inherit;color:var(--ink-soft);font-size:.9rem}
.solver-pick button.on{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-dark)}

@media (max-width:880px){
  .exam-layout{grid-template-columns:1fr}
  .optik{position:static;max-height:none}
  .optik .opt-body{max-height:none}
  .solver .sv-grid{grid-template-columns:1fr}
  .solver .sv-paper{border-right:none;border-bottom:1px solid var(--line)}
  .calc-fab{width:52px;height:52px;font-size:1.3rem}
  .scicalc-row{grid-template-columns:1fr!important}
  .scicalc{max-width:none}
}