:root{box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 7rem)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:1.0625rem;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
img{max-width:100%}
a{color:var(--accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-999px;top:0;background:var(--surface);padding:.5rem 1rem;z-index:99}
.skip:focus{left:1rem}
.muted{color:var(--muted)} .small{font-size:.9rem} .nowrap{white-space:nowrap}
h1,h2,h3{color:var(--brand-ink);letter-spacing:-.02em;line-height:1.15}
:where(main){flex:1}
form.inline{display:inline}

/* ---------- Header ---------- */
.site-head{background:var(--brand-yellow);color:var(--brand-yellow-ink);position:sticky;top:0;z-index:20;box-shadow:0 1px 0 rgba(0,0,0,.08)}
.head-in{max-width:1180px;margin:0 auto;padding:.7rem 1.25rem;display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:inherit;margin-right:auto}
.badge{display:grid;place-items:center;width:42px;height:42px;border-radius:10px;background:var(--brand-ink);color:var(--brand-yellow);font-weight:800;letter-spacing:.02em}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:1.05rem}
.brand-text small{font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;opacity:.75}
.site-nav{display:flex;align-items:center;gap:.25rem}
.site-nav a,.nav-btn{color:inherit;text-decoration:none;font-weight:600;padding:.45rem .8rem;border-radius:8px;font:inherit;font-weight:600;background:none;border:0;cursor:pointer}
.site-nav a:hover,.nav-btn:hover{background:rgba(0,0,0,.07)}
.site-nav a.on{background:rgba(0,0,0,.1)}
.site-nav a.cta{background:var(--brand-ink);color:var(--brand-yellow)}
.nav-toggle{display:none;font:inherit;font-weight:600;background:transparent;border:2px solid currentColor;border-radius:8px;padding:.3rem .8rem;color:inherit;cursor:pointer}
@media (max-width:720px){
  .nav-toggle{display:inline-block}
  .site-nav:not(.open-always){display:none;width:100%;flex-direction:column;align-items:stretch;padding-bottom:.4rem}
  .site-nav.open{display:flex}
  .site-nav.open form{display:block}
  .site-nav.open .nav-btn{width:100%;text-align:left}
  .brand-text small{display:none}
}

/* ---------- Flash ---------- */
.flash-wrap{max-width:1180px;margin:1rem auto 0;padding:0 1.25rem;width:100%}
.flash{padding:.8rem 1rem;border-radius:10px;margin-bottom:.6rem;border-left:4px solid var(--ok);background:var(--ok-soft)}
.flash.err{border-left-color:var(--bad);background:var(--bad-soft)}

/* ---------- Genel düzen ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:2rem 1.25rem 4rem;width:100%}
.btn{display:inline-block;font:inherit;font-weight:700;background:var(--accent);color:var(--accent-ink);border:2px solid var(--accent);border-radius:10px;padding:.6rem 1.15rem;cursor:pointer;text-decoration:none;line-height:1.3}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--accent)}
.btn.sm{padding:.35rem .75rem;font-size:.9rem;border-radius:8px}
.btn.big{font-size:1.1rem;padding:.8rem 1.4rem}
.btn.danger{background:var(--bad);border-color:var(--bad);color:#fff}

/* ---------- Giriş / kayıt ---------- */
.auth{max-width:440px;margin:0 auto;padding:3rem 1.25rem 4rem;width:100%}
.auth h1{font-size:2rem;margin:0 0 .4rem}
.form{display:grid;gap:1rem;margin:1.5rem 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem}
.form label{display:grid;gap:.35rem;font-weight:600;font-size:.95rem}
.form input,.filters input,.filters select,.inline-form input{font:inherit;font-weight:400;padding:.6rem .75rem;border:2px solid var(--line);border-radius:9px;background:var(--bg);color:var(--ink);width:100%}
.form input:focus{border-color:var(--accent);outline:none}
.form label.check{display:flex;gap:.6rem;align-items:flex-start;font-weight:400;font-size:.92rem;color:var(--muted)}
.form label.check input{width:auto;margin-top:.3rem}
.form.grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));align-items:end}
dl.facts{display:grid;grid-template-columns:auto 1fr;gap:.4rem 1.2rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem 1.4rem}
dl.facts dt{color:var(--muted)} dl.facts dd{margin:0;font-weight:600}

/* ---------- Dersler ana sayfası ---------- */
.home-hero{display:grid;grid-template-columns:1.2fr 1fr;gap:2.5rem;align-items:center;margin:1rem 0 3rem}
.kicker{font-weight:700;color:var(--muted);margin:0 0 .5rem}
.home-hero h1{font-size:clamp(1.9rem,4.2vw,2.8rem);margin:0 0 1rem}
.lead{font-size:1.15rem;color:var(--muted);margin:0 0 1.6rem;max-width:58ch}
.window{background:var(--code-bg);color:var(--code-ink);border-radius:16px;overflow:hidden;box-shadow:0 18px 40px -20px rgba(21,32,59,.45)}
.window-bar{display:flex;align-items:center;gap:.4rem;padding:.65rem 1rem;border-bottom:1px solid rgba(255,255,255,.08);font-family:var(--mono);font-size:.8rem;color:var(--code-com)}
.window-bar i{width:11px;height:11px;border-radius:50%;background:#FF6B6B}
.window-bar i:nth-child(2){background:#FFD166} .window-bar i:nth-child(3){background:#5ED39A}
.window-bar span{margin-left:.6rem}
.window-code{margin:0;padding:1.1rem 1.2rem;font-family:var(--mono);font-size:.92rem;line-height:1.7;overflow-x:auto}
.window-out{border-top:1px dashed rgba(255,255,255,.15);padding:1rem 1.2rem;display:grid;gap:.5rem}
.window-out span{font-size:.8rem;color:var(--code-com)}
.window-out b{font-family:var(--mono);color:var(--brand-yellow)}
.meter{height:10px;background:rgba(255,255,255,.12);border-radius:99px;overflow:hidden}
.meter i{display:block;height:100%;background:var(--brand-yellow);border-radius:99px}
.unit{margin-bottom:2.5rem}
.unit-head h2{font-size:1.5rem;margin:0 0 .2rem}
.unit-head p{margin:0 0 1rem}
.lesson-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:.7rem}
.lesson-item>a,.lesson-item>div{display:grid;grid-template-columns:auto 1fr auto;gap:.8rem;align-items:center;padding:.85rem 1rem;background:var(--surface);border:2px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink);height:100%}
.lesson-item>a:hover{border-color:var(--accent)}
.li-num{display:grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--accent-soft);color:var(--accent);font-weight:800;font-size:.9rem}
.li-title{font-weight:600}
.li-meta{font-size:.85rem;color:var(--muted);white-space:nowrap}
.lesson-item.st-soon>div{opacity:.6;border-style:dashed}
.lesson-item.st-soon .li-num{background:var(--line);color:var(--muted)}
.lesson-item.st-started .li-num{background:var(--brand-yellow);color:var(--brand-ink)}
.lesson-item.st-done>a{border-color:var(--ok)}
.lesson-item.st-done .li-num{background:var(--ok);color:#fff}
@media (max-width:860px){.home-hero{grid-template-columns:1fr}}

/* ---------- Ders sayfası ---------- */
.lesson-bar{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:66px;z-index:15}
.lesson-bar-in{max-width:1180px;margin:0 auto;padding:.55rem 1.25rem;display:flex;align-items:center;gap:1rem}
.lb-title{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bar{flex:1;height:8px;background:var(--line);border-radius:99px;overflow:hidden;max-width:280px;margin-left:auto}
.bar i{display:block;height:100%;background:var(--ok);border-radius:99px;transition:width .4s ease}
.lesson-bar small{color:var(--muted);white-space:nowrap;font-size:.875rem}
.toc-btn{display:none;font:inherit;font-size:.9rem;background:transparent;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:.3rem .7rem;cursor:pointer}
.layout{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:240px minmax(0,1fr);gap:3rem;padding:0 1.25rem;width:100%;flex:1}
nav.toc{position:sticky;top:7.5rem;align-self:start;padding:2rem 0;font-size:.95rem;max-height:calc(100vh - 8rem);overflow-y:auto}
.toc h2{font-size:.95rem;margin:0 0 .5rem;color:var(--muted);font-weight:600;letter-spacing:0}
.toc ol{list-style:none;margin:0 0 1.5rem;padding:0}
.toc li a,.toc li .locked{display:block;padding:.3rem .6rem;border-left:3px solid transparent;color:var(--ink);text-decoration:none;border-radius:0 6px 6px 0}
.toc li a:hover{background:var(--accent-soft)}
.toc li a.here{border-left-color:var(--brand-yellow);background:var(--box);font-weight:700}
.toc li .locked{color:var(--muted)}
main.lesson{padding:2.5rem 0 5rem;max-width:72ch}
.hero{margin-bottom:3rem}
.crumb{color:var(--muted);font-size:.95rem;margin:0 0 .5rem;font-weight:600}
main.lesson h1{font-size:clamp(2rem,5vw,2.8rem);margin:0 0 1rem}
.memory{display:flex;flex-wrap:wrap;gap:1.25rem;padding:1.5rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.cell{flex:1 1 150px;min-width:0}
.cell code{display:block;font-family:var(--mono);font-size:.82rem;color:var(--muted);margin-bottom:.4rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.slot{height:74px;border:2px solid var(--box-edge);border-top-width:8px;background:var(--box);border-radius:4px 4px 10px 10px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.slot b{font-family:var(--mono);font-size:1.5rem;font-weight:700;color:var(--brand-ink);animation:drop .55s cubic-bezier(.3,1.4,.5,1) both}
.cell:nth-child(2) .slot b{animation-delay:.25s} .cell:nth-child(3) .slot b{animation-delay:.5s}
.cell .name{display:block;font-weight:700;margin-top:.45rem}
.cell .type{font-size:.875rem;color:var(--muted)}
@keyframes drop{from{transform:translateY(-70px);opacity:0}to{transform:none;opacity:1}}
@media (prefers-reduced-motion:reduce){.slot b{animation:none}.bar i{transition:none}}
main.lesson section{margin-bottom:3.25rem}
h2.sec{font-size:1.6rem;margin:0 0 .9rem}
main.lesson p{margin:0 0 1rem}
code.in{font-family:var(--mono);font-size:.88em;background:var(--accent-soft);padding:.1em .35em;border-radius:4px}
ul.rules{padding-left:1.25rem} ul.rules li{margin-bottom:.35rem}
.note{border-left:4px solid var(--accent);background:var(--surface);padding:1rem 1.2rem;border-radius:0 10px 10px 0;margin:1.25rem 0}
.note.exam{border-left-color:var(--box-edge);background:var(--box)}
.note p:last-child{margin:0}
.note strong{display:block;margin-bottom:.25rem;color:var(--brand-ink)}
.table-wrap{overflow-x:auto;margin:1rem 0 1.5rem;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{text-align:left;padding:.65rem .9rem;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:0}
th{font-weight:700;color:var(--muted);font-size:.88rem}
td code{font-family:var(--mono);font-size:.9em}
.code{background:var(--code-bg);color:var(--code-ink);border-radius:12px;overflow:hidden;margin:1rem 0 1.25rem}
.code-head{display:flex;justify-content:space-between;align-items:center;padding:.5rem 1rem;font-size:.82rem;color:var(--code-com);border-bottom:1px solid rgba(255,255,255,.08);font-family:var(--mono)}
.code pre{margin:0;padding:1rem 1.1rem;overflow-x:auto;font-family:var(--mono);font-size:.9rem;line-height:1.65}
.kw{color:var(--code-kw)} .num{color:var(--code-num)} .str{color:var(--code-str)} .com{color:var(--code-com);font-style:italic}
.out{border-top:1px dashed rgba(255,255,255,.15);padding:.75rem 1.1rem;font-family:var(--mono);font-size:.9rem;display:none;color:var(--brand-yellow)}
.out.show{display:block}
.out span{color:var(--code-com);display:block;font-size:.78rem;margin-bottom:.2rem;font-family:var(--sans)}
.code-btn{font:inherit;font-family:var(--sans);font-size:.85rem;background:transparent;color:var(--code-kw);border:1px solid rgba(143,179,255,.4);border-radius:6px;padding:.2rem .65rem;cursor:pointer}
.task{background:var(--surface);border:2px solid var(--line);border-radius:var(--radius);padding:1.4rem 1.4rem 1.2rem;margin:1.5rem 0;transition:opacity .2s}
.task.solved{border-color:var(--ok)}
.task.busy{opacity:.7}
.task-top{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;margin-bottom:.6rem}
.task-kind{font-size:.875rem;color:var(--muted);font-weight:600}
.check-mark{font-size:.875rem;color:var(--ok);font-weight:700;visibility:hidden}
.task.solved .check-mark{visibility:visible}
.q{font-weight:700;margin-bottom:.9rem}
.task .code{margin:.25rem 0 1rem}
.opts{display:grid;gap:.55rem}
.opt{display:flex;gap:.75rem;align-items:flex-start;text-align:left;width:100%;font:inherit;color:var(--ink);background:var(--bg);border:2px solid var(--line);border-radius:10px;padding:.7rem .9rem;cursor:pointer}
.opt:hover{border-color:var(--accent)}
.opt .letter{font-weight:800;color:var(--muted);min-width:1.2em}
.opt code{font-family:var(--mono);font-size:.92em}
.opt.right{border-color:var(--ok);background:var(--ok-soft)}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.fb{margin-top:.85rem;padding:.75rem 1rem;border-radius:10px;font-size:.98rem;display:none}
.fb.show{display:block}
.fb.ok{background:var(--ok-soft);border-left:4px solid var(--ok)}
.fb.no{background:var(--bad-soft);border-left:4px solid var(--bad)}
.blank-line{font-family:var(--mono);font-size:.95rem;display:flex;align-items:center;flex-wrap:wrap;gap:.4rem;margin-bottom:.7rem;white-space:pre}
.blank-line input{font-family:var(--mono);font-size:.95rem;width:7.5em;padding:.35rem .5rem;border:2px solid var(--line);border-radius:6px;background:var(--bg);color:var(--ink)}
.blank-line input.right{border-color:var(--ok);background:var(--ok-soft)}
.blank-line input.wrong{border-color:var(--bad);background:var(--bad-soft)}
.row{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1rem}
.parsons{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.pcol h4{margin:0 0 .4rem;font-size:.92rem;color:var(--muted);font-weight:600}
.plist{min-height:210px;background:var(--bg);border:2px dashed var(--line);border-radius:10px;padding:.5rem;display:flex;flex-direction:column;gap:.4rem}
.plist.target{border-style:solid}
.ptgt{display:flex;flex-direction:column;gap:.4rem;flex:1}
.pline{font-family:var(--mono);font-size:.85rem;text-align:left;background:var(--code-bg);color:var(--code-ink);border:2px solid transparent;border-radius:7px;padding:.5rem .65rem;cursor:pointer;white-space:pre;overflow-x:auto}
.pline:hover{border-color:var(--brand-yellow)}
.ptgt .pline{margin-left:1.6rem}
.pfixed{font-family:var(--mono);font-size:.8rem;color:var(--muted);padding:.15rem .6rem;white-space:pre}
.empty-hint{color:var(--muted);font-size:.88rem;padding:.5rem;text-align:center;margin:auto 0}
.trace-in{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center}
.trace-in input{font-family:var(--mono);font-size:.95rem;flex:1 1 220px;padding:.55rem .7rem;border:2px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink)}
.soon{background:var(--surface);border:2px dashed var(--line);border-radius:var(--radius);padding:1.25rem 1.4rem;color:var(--muted)}
.soon strong{color:var(--ink)} .soon p{margin:.4rem 0 0 !important}
.pager{display:flex;justify-content:space-between;gap:1rem;border-top:1px solid var(--line);padding-top:1.5rem;margin-top:3rem}
.pager a,.pager span{text-decoration:none;font-weight:700}
.pager .off{color:var(--muted);font-weight:600}
.pager .right{text-align:right;margin-left:auto}
.pager small{display:block;color:var(--muted);font-weight:400}
@media (max-width:900px){
  .layout{grid-template-columns:1fr;gap:0}
  nav.toc{display:none;position:static;padding:1rem 0 0;max-height:none}
  nav.toc.open{display:block}
  .toc-btn{display:inline-block}
  .lesson-bar{top:62px}
  main.lesson{padding-top:1.75rem}
  .bar{max-width:none}
  .lb-title{display:none}
}
@media (max-width:560px){
  .parsons{grid-template-columns:1fr}
  .memory{padding:1rem;gap:.9rem}
  .task{padding:1.1rem}
}

/* ---------- Yönetim ---------- */
.admin-head{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;margin-bottom:1.5rem}
.admin-head h1{margin:0}
.tabs{display:flex;gap:.3rem;flex-wrap:wrap}
.tabs a{padding:.45rem .9rem;border-radius:9px;text-decoration:none;color:var(--ink);font-weight:600;border:2px solid var(--line);background:var(--surface)}
.tabs a.on{border-color:var(--brand-ink);background:var(--brand-ink);color:var(--brand-yellow)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:.8rem;margin-bottom:1.5rem}
.stats>div{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1rem 1.1rem;border-top:4px solid var(--brand-yellow)}
.stats b{display:block;font-size:1.6rem;color:var(--brand-ink);line-height:1.2}
.stats b small{font-size:1rem;color:var(--muted)}
.stats span{color:var(--muted);font-size:.9rem}
.filters{display:flex;gap:.6rem;flex-wrap:wrap;margin-bottom:1rem}
.filters input{flex:1 1 220px;width:auto}
.filters select{width:auto}
table.data caption{text-align:left;padding:.8rem .9rem;font-weight:700;color:var(--brand-ink);border-bottom:1px solid var(--line);background:var(--bg)}
table.data td a{text-decoration:none}
.pill{display:inline-block;font-size:.78rem;font-weight:700;padding:.15rem .55rem;border-radius:99px;background:var(--line);color:var(--ink);vertical-align:middle}
.pill.active{background:var(--ok-soft);color:var(--ok)}
.pill.pending{background:var(--warn-soft);color:var(--warn)}
.pill.disabled{background:var(--bad-soft);color:var(--bad)}
.pill.admin{background:var(--brand-ink);color:var(--brand-yellow)}
.mini{height:6px;width:90px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:.2rem}
.mini i{display:block;height:100%;background:var(--ok)}
.res{font-weight:700;font-size:.88rem}
.res.ok{color:var(--ok)} .res.no{color:var(--bad)}
.kind{display:block;font-size:.75rem;color:var(--muted);font-weight:600}
pre.resp{margin:0;font-family:var(--mono);font-size:.82rem;white-space:pre-wrap;word-break:break-word;background:var(--bg);padding:.3rem .5rem;border-radius:6px;border-left:3px solid var(--line);max-width:340px}
pre.resp.ok{border-left-color:var(--ok)} pre.resp.no{border-left-color:var(--bad)}
.wrong-item{display:flex;gap:.5rem;align-items:flex-start;margin-bottom:.35rem}
.wrong-item span{font-size:.8rem;color:var(--muted);white-space:nowrap}
.back{margin:0 0 .5rem}
.profile{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;align-items:flex-start;margin-bottom:1.25rem}
.profile h2{margin:0 0 .3rem;font-size:1.7rem}
.profile p{margin:0}
.actions{display:flex;gap:.5rem;flex-wrap:wrap}
details.danger,details.add-user{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1rem 1.2rem;margin:1.5rem 0}
details summary{cursor:pointer;font-weight:700}
details.danger form{display:flex;gap:.6rem;flex-wrap:wrap;align-items:end;margin-top:1rem}
.inline-form label{display:grid;gap:.3rem;font-size:.9rem;font-weight:600}
details .form{border:0;padding:0;margin:1rem 0 0}
h3{margin:2rem 0 .5rem;font-size:1.2rem}

/* ---------- Footer ---------- */
.site-foot{background:var(--brand-ink);color:#C9D0E4;margin-top:auto}
.foot-in{max-width:1180px;margin:0 auto;padding:1.6rem 1.25rem;font-size:.85rem}
.foot-in strong{color:#fff;font-size:1rem}
.foot-in p{margin:.4rem 0 0;max-width:80ch}

/* ---------- Kendin dene + Java editörü (Bluebook benzeri, açık tema) ---------- */
.tryit{margin:1.5rem 0;border:2px solid var(--brand-yellow);border-radius:var(--radius);background:var(--surface);overflow:hidden}
.tryit-head{display:flex;flex-wrap:wrap;gap:.3rem 1rem;align-items:baseline;padding:.8rem 1.1rem;background:var(--box)}
.tryit-head strong{color:var(--brand-ink)}
.tryit-head span{color:var(--muted);font-size:.92rem}
.tryit .jeditor{border:0;border-radius:0;margin:0}
.jeditor{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;margin:.25rem 0 .5rem}
.je-bar{display:flex;justify-content:space-between;align-items:center;gap:.6rem;padding:.4rem .5rem .4rem .9rem;background:#EEF1F7;border-bottom:1px solid var(--line);flex-wrap:wrap}
.je-file{font-family:var(--mono);font-size:.82rem;color:var(--muted)}
.has-draft .je-file::after{content:"  taslak";color:var(--warn);font-family:var(--sans);font-weight:600}
.je-actions{display:flex;gap:.35rem;flex-wrap:wrap}
.je-btn,.je-run{font:inherit;font-size:.86rem;font-weight:600;border-radius:7px;padding:.3rem .75rem;cursor:pointer;border:1px solid var(--line);background:#fff;color:var(--ink)}
.je-btn:hover{border-color:var(--accent)}
.je-btn[aria-expanded="true"]{background:var(--accent-soft);border-color:var(--accent)}
.je-run{background:var(--ok);border-color:var(--ok);color:#fff;padding-left:.9rem;padding-right:.9rem}
.je-run:disabled{opacity:.6;cursor:wait}
.je-fixed{margin:0;padding:.35rem .9rem .35rem 3.6rem;font-family:var(--mono);font-size:.88rem;line-height:1.55;background:#F7F8FB;color:#6A7390;white-space:pre;overflow-x:auto;border-bottom:1px dashed var(--line)}
.je-fixed + .je-body{border-top:0}
.je-body + .je-fixed{border-top:1px dashed var(--line);border-bottom:0}
.je-fixed .kw{color:#4C63B6} .je-fixed .num{color:#9A6B00} .je-fixed .str{color:#2C7A4B} .je-fixed .com{color:#8C96B0}
.je-body{display:flex;min-height:180px;max-height:480px;background:#fff}
.je-gutter{margin:0;padding:.7rem .6rem .7rem 0;width:3rem;flex:none;text-align:right;font-family:var(--mono);font-size:.9rem;line-height:1.55;color:#A2A9BE;background:#FAFBFD;border-right:1px solid var(--line);overflow:hidden;user-select:none;white-space:pre}
.je-code{flex:1;margin:0;border:0;outline:0;resize:vertical;padding:.7rem .9rem;font-family:var(--mono);font-size:.9rem;line-height:1.55;color:#1B2236;background:transparent;white-space:pre;overflow:auto;tab-size:4;min-height:180px}
.je-code:focus{box-shadow:inset 0 0 0 2px var(--accent-soft)}
.je-stdin{padding:.6rem .9rem;border-top:1px solid var(--line);background:#FAFBFD}
.je-stdin label{display:grid;gap:.35rem;font-size:.85rem;color:var(--muted)}
.je-stdin textarea{font-family:var(--mono);font-size:.88rem;border:1px solid var(--line);border-radius:6px;padding:.4rem .55rem;resize:vertical;background:#fff;color:var(--ink)}
.je-console{border-top:1px solid var(--line);background:#141A2E;color:#E6EAF5}
.je-console-head{display:flex;justify-content:space-between;padding:.4rem .9rem;font-size:.8rem;color:#9AA3C0;border-bottom:1px solid rgba(255,255,255,.08)}
.je-status.ok{color:#5ED39A} .je-status.bad{color:#FF8E6E} .je-status.warn{color:#FFD166} .je-status.run{color:#8FB3FF}
.je-out{margin:0;padding:.7rem .9rem;font-family:var(--mono);font-size:.86rem;line-height:1.5;white-space:pre-wrap;word-break:break-word;max-height:300px;overflow:auto}
.je-console.bad .je-out{color:#FFB39E}
.je-off{margin:0;padding:.55rem .9rem;font-size:.85rem;color:var(--warn);background:var(--warn-soft);border-top:1px solid var(--line)}
.jeditor.busy .je-body{opacity:.75}

/* ---------- Ek etkinlik türleri ---------- */
.q p{margin:0 0 .6rem}
.opts.multi .opt{cursor:pointer;align-items:center}
.opts.multi input{width:1.1rem;height:1.1rem;accent-color:var(--accent);flex:none}
.opts.multi .opt:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.opt code{font-family:var(--mono);font-size:.9em;white-space:pre-wrap}
textarea.free{width:100%;font:inherit;padding:.7rem .85rem;border:2px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);resize:vertical}
textarea.free:focus{border-color:var(--accent);outline:none}
.trace-in.col{flex-direction:column;align-items:stretch}
.trace-in.col textarea{font-family:var(--mono);font-size:.95rem;padding:.55rem .7rem;border:2px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);resize:vertical}
.trace-in.col .btn{align-self:flex-start}
.blank-line input.wide{width:12em}
.blank-line code{font-family:var(--mono)}
.locked-box{border:2px dashed var(--line);border-radius:var(--radius);padding:1.1rem 1.3rem;background:var(--surface)}
.locked-box p{margin:.3rem 0 0 !important;color:var(--muted)}
.solutions .table-wrap{margin-top:.5rem}
.flow{display:flex;flex-wrap:wrap;align-items:stretch;gap:.5rem;margin:1rem 0 1.25rem}
.flow div{flex:1 1 120px;background:var(--surface);border:2px solid var(--line);border-radius:10px;padding:.6rem .7rem;text-align:center}
.flow div code{display:block;font-family:var(--mono);font-size:.85rem;font-weight:700;color:var(--brand-ink)}
.flow div span{font-size:.82rem;color:var(--muted)}
.flow i{align-self:center;font-style:normal;color:var(--muted);font-weight:700}
.goals{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--brand-yellow);border-radius:0 12px 12px 0;padding:.9rem 1.2rem;margin:0 0 2.5rem}
.goals strong{display:block;margin-bottom:.3rem;color:var(--brand-ink)}
.goals ul{margin:0;padding-left:1.2rem}
.note.warn{border-left-color:var(--bad);background:var(--bad-soft)}
.note.act{border-left-color:var(--ok);background:var(--ok-soft)}
.homework-intro{background:var(--brand-ink);color:#E9EDF7;border-radius:var(--radius);padding:1.1rem 1.3rem;margin-bottom:1rem}
.homework-intro strong{color:var(--brand-yellow)}
.homework-intro p{margin:.3rem 0 0 !important}
.pp{display:grid;grid-template-columns:1fr 1fr;gap:.8rem;margin:1rem 0}
.pp>div{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:.9rem 1.1rem}
.pp strong{color:var(--brand-ink)}
.pp p{margin:.3rem 0 0 !important;font-size:.97rem}
@media (max-width:560px){.pp{grid-template-columns:1fr}.je-bar{padding-left:.6rem}}
pre.resp{max-height:260px;overflow:auto}
details.runcode summary{font-weight:600;font-size:.88rem;color:var(--accent)}
details.runcode pre{margin-top:.4rem;max-width:520px}
.layout>*{min-width:0}
main.lesson,.task,.jeditor,.tryit{min-width:0;max-width:100%}
.je-body{min-width:0}
.je-code{min-width:0;width:100%}
.pcol{min-width:0}
.pline{white-space:pre-wrap;word-break:break-word}
.blank-line{white-space:normal}
.blank-line code{white-space:pre-wrap;overflow-wrap:anywhere}
.q code,.opt code,main.lesson p code,td code{overflow-wrap:anywhere}
main.lesson pre{max-width:100%}

/* ---------- Dil seçici ---------- */
.lang-switch{display:flex;border:2px solid var(--brand-ink);border-radius:9px;overflow:hidden;flex:none}
.lang-switch a{padding:.25rem .6rem;font-weight:800;font-size:.82rem;text-decoration:none;color:var(--brand-ink);letter-spacing:.04em}
.lang-switch a.on{background:var(--brand-ink);color:var(--brand-yellow)}
.lang-switch a:not(.on):hover{background:rgba(0,0,0,.08)}
@media (max-width:720px){.head-in{gap:.6rem}.lang-switch{order:2}.nav-toggle{order:3}.site-nav{order:4}}
.lang-note{margin:-1.5rem 0 2.5rem}

/* ---------- Giriş / kayıt ---------- */
.auth-wrap{max-width:1080px;margin:0 auto;padding:2.5rem 1.25rem 4rem;width:100%;display:grid;grid-template-columns:1.05fr .95fr;gap:2.5rem;align-items:center}
.auth-side{background:var(--brand-ink);color:#E9EDF7;border-radius:20px;padding:2.2rem 2rem;position:relative;overflow:hidden;align-self:stretch;display:flex;flex-direction:column;justify-content:center}
.auth-side::before{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(255,207,51,.32),rgba(255,207,51,0) 70%);right:-110px;top:-120px}
.auth-side h2{color:#fff;font-size:clamp(1.6rem,3vw,2.2rem);margin:0 0 1.4rem;position:relative}
.kicker.light{color:var(--brand-yellow);margin:0 0 .4rem;position:relative}
.auth-side .window{position:relative;box-shadow:0 18px 40px -18px rgba(0,0,0,.6)}
.window-code .fn{color:#FFD166}
.auth-points{list-style:none;padding:0;margin:1.6rem 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:.7rem;position:relative}
.auth-points li{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:.7rem .8rem;display:flex;flex-direction:column;gap:.1rem}
.auth-points b{color:var(--brand-yellow);font-size:1.05rem}
.auth-points span{font-size:.82rem;color:#B9C1D9;line-height:1.35}
.auth-card{background:var(--surface);border:1px solid var(--line);border-top:6px solid var(--brand-yellow);border-radius:20px;padding:2.2rem 2rem;box-shadow:0 20px 50px -30px rgba(21,32,59,.35)}
.auth-card h1{font-size:2rem;margin:0 0 .3rem}
.auth-card > .muted{margin:0 0 1.4rem}
.form.bare{border:0;padding:0;margin:0 0 1.2rem;background:none}
.form .two{display:grid;grid-template-columns:1fr 1fr;gap:1rem;align-items:end}
.btn.full{width:100%;text-align:center}
.auth-alt{display:grid;gap:.5rem;margin:1.2rem 0 .8rem;padding-top:1.2rem;border-top:1px solid var(--line)}
.auth-alt span{color:var(--muted);font-size:.92rem;text-align:center}
.center{text-align:center}
@media (max-width:860px){
  .auth-wrap{grid-template-columns:1fr;padding-top:1.5rem;gap:1.5rem}
  .auth-side{order:2;padding:1.6rem 1.3rem}
  .auth-card{padding:1.6rem 1.3rem}
}
@media (max-width:480px){.form .two{grid-template-columns:1fr}.auth-points{grid-template-columns:1fr}}

/* ---------- Ders kilidi ---------- */
.lesson-item.st-locked>div{opacity:.62;border-style:dashed;cursor:not-allowed;background:var(--bg)}
.lesson-item.st-locked .li-num{background:var(--line);color:var(--muted)}
.lock-meta{display:inline-flex;align-items:center;gap:.3rem;font-weight:600}
.lock-ico{width:14px;height:14px;fill:currentColor}
.access-box{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--brand-yellow);border-radius:0 14px 14px 0;padding:1.1rem 1.3rem;margin:1.5rem 0}
.access-head h3{margin:0 0 .2rem}
.access-head p{margin:0 0 .9rem}
.lchips{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.45rem}
.lchip{position:relative;cursor:pointer}
.lchip input{position:absolute;opacity:0;pointer-events:none}
.lchip span{display:flex;gap:.5rem;align-items:center;padding:.45rem .6rem;border:2px dashed var(--line);border-radius:10px;background:var(--bg);color:var(--muted);height:100%}
.lchip b{display:grid;place-items:center;min-width:26px;height:26px;border-radius:7px;background:var(--line);color:var(--muted);font-size:.85rem}
.lchip small{font-size:.78rem;line-height:1.25}
.lchip input:checked + span{border-style:solid;border-color:var(--ok);background:var(--ok-soft);color:var(--ink)}
.lchip input:checked + span b{background:var(--ok);color:#fff}
.lchip input:focus-visible + span{outline:3px solid var(--accent);outline-offset:2px}
.access-actions{align-items:center}
.upto{display:inline-flex;align-items:center;gap:.35rem;font-size:.9rem;color:var(--muted)}
.upto input{width:4.2rem;font:inherit;padding:.3rem .45rem;border:2px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink)}
.bulk-box{display:flex;flex-wrap:wrap;gap:.6rem 1rem;align-items:center;background:var(--surface);border:1px solid var(--line);border-top:4px solid var(--brand-yellow);border-radius:12px;padding:.9rem 1.1rem;margin:0 0 1rem}
.bulk-box label{display:flex;align-items:center;gap:.4rem;font-size:.92rem;font-weight:600}
.bulk-box input[type=number]{width:4.2rem}
.bulk-box input,.bulk-box select{font:inherit;padding:.35rem .5rem;border:2px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink)}
table.matrix th.mc,table.matrix td.mc{text-align:center;padding:.35rem .25rem;min-width:30px}
table.matrix td.mc input{width:1.1rem;height:1.1rem;accent-color:var(--ok);cursor:pointer}
.col-toggle{font:inherit;font-weight:800;font-size:.82rem;background:var(--accent-soft);color:var(--accent);border:0;border-radius:6px;padding:.15rem .4rem;cursor:pointer}
.col-toggle:hover{background:var(--accent);color:#fff}
table.matrix td:first-child{position:sticky;left:0;background:var(--surface);z-index:1}