/* =====================================================================
   ÖĞRENME ATÖLYESİ · "Duolingo" kaplaması (ortak: kabuk, matematik, tarih, oop)
   Renk, yazı tipi, düğme, gezinme, yol ve ders akışı bu dosyadan gelir. Özgün çizimdir; Duolingo varlığı kullanılmaz.
   Erişilebilirlik: metin/zemin çiftleri WCAG AA; düğmelerde koyu yeşil metin kullanılır.
   ===================================================================== */
@font-face{font-family:"Nunito";font-style:normal;font-weight:200 1000;font-display:swap;src:url("../fonts/nunito-latin-ext-wght-normal.woff2") format("woff2-variations"),url("../fonts/nunito-latin-ext-wght-normal.woff2") format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Nunito";font-style:normal;font-weight:200 1000;font-display:swap;src:url("../fonts/nunito-latin-wght-normal.woff2") format("woff2-variations"),url("../fonts/nunito-latin-wght-normal.woff2") format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
:root{
  --sans:"Nunito","SF Pro Rounded",ui-rounded,"Segoe UI",system-ui,-apple-system,Roboto,sans-serif;
  --disp:var(--sans);
  --code:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  color-scheme:dark;
  --bg:#131f24;--panel:#131f24;--panel2:#202f36;--raise:#37464f;--line:#37464f;--grid:#243239;
  --ink:#f1f7fb;--muted:#afafaf;
  --accent:#58cc02;--accent-d:#58a700;--accent-soft:#1c3711;--accent-text:#89e219;--onaccent:#163300;
  --blue:#1cb0f6;--blue-d:#1899d6;--blue-text:#49c0f8;--blue-soft:#16323f;--onblue:#00263a;
  --violet:#ce82ff;--violet-soft:#2d2040;--amber:#ffc800;--amber-soft:#382f00;--gold:#ffc800;--gold-d:#d9a900;
  --orange:#ff9600;--orange-d:#d97d00;--orange-text:#ff9600;
  --ok:#58cc02;--ok-soft:#1c3711;--okt:#89e219;--bad:#ff4b4b;--bad-soft:#3b1b1f;--badt:#ff7676;--bad-d:#ea2b2b;
  --warn:#ffc800;--warn-soft:#382f00;--info:#49c0f8;--info-soft:#16323f;
  --u0:#58cc02;--u1:#1cb0f6;--u2:#ce82ff;--u3:#ff9600;--u4:#ffc800;
  --ub0:#58cc02;--ub1:#1cb0f6;--ub2:#ce82ff;--ub3:#ff9600;--ub4:#ffc800;--ub5:#ff86d0;--ub6:#2ed1c4;
  --depth:4px;--r1:12px;--r2:16px;--r3:20px;--rail:256px;--top:64px;--tab:68px;
  --sh1:none;--sh2:0 10px 30px rgba(0,0,0,.45);
  --focus:0 0 0 3px var(--bg),0 0 0 5px var(--blue);
}
:root[data-theme="light"]{
  color-scheme:light;
  --bg:#fff;--panel:#fff;--panel2:#f7f7f7;--raise:#e5e5e5;--line:#e5e5e5;--grid:#f0f0f0;
  --ink:#4b4b4b;--muted:#6b6b6b;
  --accent:#58cc02;--accent-d:#58a700;--accent-soft:#e3f8cf;--accent-text:#356b00;--onaccent:#163300;
  --blue:#1cb0f6;--blue-d:#1899d6;--blue-text:#0b6fa6;--blue-soft:#ddf4ff;--onblue:#00263a;
  --violet:#7b3fb8;--violet-soft:#f3e5ff;--amber:#8f6200;--amber-soft:#fff4c2;--gold:#ffc800;--gold-d:#d9a900;
  --orange:#ff9600;--orange-d:#d97d00;--orange-text:#a35a00;
  --ok:#3a7a00;--ok-soft:#d7ffb8;--okt:#2f6a00;--bad:#d62828;--bad-soft:#ffdfe0;--badt:#b71f1f;--bad-d:#ea2b2b;
  --warn:#8f6200;--warn-soft:#fff4c2;--info:#0b6fa6;--info-soft:#ddf4ff;
  --u0:#3a7a00;--u1:#0b6fa6;--u2:#7b3fb8;--u3:#a35a00;--u4:#8f6200;
  --sh2:0 10px 30px rgba(0,0,0,.14);
  --focus:0 0 0 3px var(--bg),0 0 0 5px var(--blue-d);
}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]):not([data-theme="light"]){
  color-scheme:light;
  --bg:#fff;--panel:#fff;--panel2:#f7f7f7;--raise:#e5e5e5;--line:#e5e5e5;--grid:#f0f0f0;
  --ink:#4b4b4b;--muted:#6b6b6b;
  --accent:#58cc02;--accent-d:#58a700;--accent-soft:#e3f8cf;--accent-text:#356b00;--onaccent:#163300;
  --blue:#1cb0f6;--blue-d:#1899d6;--blue-text:#0b6fa6;--blue-soft:#ddf4ff;--onblue:#00263a;
  --violet:#7b3fb8;--violet-soft:#f3e5ff;--amber:#8f6200;--amber-soft:#fff4c2;
  --orange-text:#a35a00;--ok:#3a7a00;--ok-soft:#d7ffb8;--okt:#2f6a00;--bad:#d62828;--bad-soft:#ffdfe0;--badt:#b71f1f;
  --warn:#8f6200;--warn-soft:#fff4c2;--info:#0b6fa6;--info-soft:#ddf4ff;
  --u0:#3a7a00;--u1:#0b6fa6;--u2:#7b3fb8;--u3:#a35a00;--u4:#8f6200;
  --sh2:0 10px 30px rgba(0,0,0,.14);--focus:0 0 0 3px var(--bg),0 0 0 5px var(--blue-d);
}}

/* ---------- temel ---------- */
html{scroll-padding-top:24px}
body{font-family:var(--sans);font-weight:600;line-height:1.5;letter-spacing:0;background:var(--bg);color:var(--ink)}
h1,h2,h3,h4{font-family:var(--sans);font-weight:800;letter-spacing:0;line-height:1.25}
h1{font-size:clamp(1.625rem,3vw,2rem)}h2{font-size:1.375rem}h3{font-size:1.125rem}h4{font-size:1rem}
b,strong{font-weight:800}
a{color:var(--blue-text);font-weight:700}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:8px}
.label,.eyebrow,.tag,.mini-meta,.status-chip,.lbl,.step-no,.node-state,.diagram-caption,.stat small,.sync{font-family:var(--sans)!important;font-weight:800!important;letter-spacing:.06em!important;text-transform:uppercase}
.muted,.footnote{font-weight:600}
code,.mono,pre.code,.code-b{font-family:var(--code)}

/* ---------- düğmeler: kalın, büyük harf, alt kenarı "derinlik" ---------- */
.btn,.opt-btn,button.btn{
  --bb:var(--line);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:11px 22px;
  background:var(--bg);color:var(--blue-text);border:2px solid var(--line);border-bottom-width:var(--depth);border-radius:var(--r2);
  font:800 .9375rem/1.2 var(--sans);letter-spacing:.07em;text-transform:uppercase;text-decoration:none;cursor:pointer;
  transition:transform .06s,filter .15s,background .15s;-webkit-tap-highlight-color:transparent;user-select:none}
.btn:hover{background:var(--panel2);border-color:var(--line);color:var(--blue-text)}
.btn:active:not(:disabled){transform:translateY(calc(var(--depth) - 1px));border-bottom-width:1px;margin-bottom:calc(var(--depth) - 1px)}
.btn.primary{background:var(--accent);border-color:var(--accent-d);color:var(--onaccent)}
.btn.primary:hover{background:var(--accent);filter:brightness(1.07);border-color:var(--accent-d);color:var(--onaccent)}
.btn.blue{background:var(--blue);border-color:var(--blue-d);color:var(--onblue)}
.btn.blue:hover{background:var(--blue);filter:brightness(1.07);border-color:var(--blue-d);color:var(--onblue)}
.btn.danger{background:var(--bg);color:var(--badt);border-color:var(--line);border-bottom-color:var(--bad)}
.btn.danger:hover{background:var(--bad-soft)}
.btn.ghost{background:transparent;border-color:transparent;border-bottom-width:2px;color:var(--blue-text)}
.btn.ghost:hover{background:var(--panel2);border-color:transparent}
.btn.ghost:active:not(:disabled){transform:none;margin-bottom:0;border-bottom-width:2px}
.btn.sm{min-height:40px;padding:7px 16px;font-size:.8125rem;border-radius:14px}
.btn.big{min-height:54px;padding:13px 28px;font-size:1rem;border-radius:var(--r2)}
.btn:disabled,.btn[disabled]{opacity:1;background:var(--raise);color:var(--muted);border-color:var(--raise);cursor:not-allowed;transform:none;filter:none}
html[data-theme="light"] .btn:disabled,html[data-theme="light"] .btn[disabled]{background:#e5e5e5;color:#8a8a8a;border-color:#e5e5e5}
.icon-btn{display:inline-grid;place-items:center;min-width:44px;height:44px;padding:0;background:transparent;border:2px solid transparent;border-radius:14px;color:var(--muted);cursor:pointer;font:800 1rem var(--sans)}
.icon-btn:hover{background:var(--panel2);color:var(--ink)}
.icon-btn .di{width:26px;height:26px;fill:var(--ic)}

/* ---------- kartlar, alanlar ---------- */
.card{background:var(--panel);border:2px solid var(--line);border-radius:var(--r3);box-shadow:none;padding:20px}
.card h2,.card h3{font-weight:800}
.card.clink,a.card{border-bottom-width:var(--depth)}
input[type=text],input[type=number],input[type=email],input[type=password],input[type=date],input[type=search],select,textarea,.fld input,.fld select,.fld textarea{
  background:var(--panel2);border:2px solid var(--line);border-radius:var(--r2);color:var(--ink);font:600 1rem var(--sans);min-height:48px;padding:10px 16px}
input:focus,select:focus,textarea:focus,.fld input:focus-visible,.fld select:focus-visible,.fld textarea:focus-visible{outline:none;border-color:var(--blue);box-shadow:none;background:var(--blue-soft)}
::placeholder{color:var(--muted);opacity:1;font-weight:600}
hr{border:0;border-top:2px solid var(--line)}

/* ---------- üst çubuk (mobil) / HUD ---------- */
.top{position:sticky;top:0;height:var(--top);background:var(--bg);border-bottom:2px solid var(--line);z-index:30}
.top-in{max-width:none;padding:0 16px;gap:10px}
.brand{gap:10px;font-weight:900}
.brand-name{font:900 1.1875rem/1.1 var(--sans);color:var(--accent-text);letter-spacing:-.01em}
.top-right{gap:8px;margin-left:auto}
.course-switch{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:6px 14px;border:2px solid var(--line)!important;border-bottom-width:var(--depth)!important;border-radius:14px!important;color:var(--blue-text)!important;font:800 .75rem/1 var(--sans)!important;letter-spacing:.07em;text-transform:uppercase;text-decoration:none;background:var(--bg)}
.course-switch:hover{background:var(--panel2)}
.hud-xp,.hud-chip,#streak:not(:empty),.lv-n{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:0 10px;border:0!important;background:transparent!important;border-radius:12px;font:900 1rem var(--sans)!important;color:var(--gold)!important;letter-spacing:0}
html[data-theme="light"] .hud-xp,html[data-theme="light"] .hud-chip.xp b,html[data-theme="light"] .lv-n{color:var(--amber)!important}
.hud-xp::before{content:"";width:22px;height:22px;background:currentColor;-webkit-mask:var(--bolt) center/contain no-repeat;mask:var(--bolt) center/contain no-repeat}
.hud-chip.fire b{color:var(--orange)}.hud-chip.fire{color:var(--orange)!important}
html[data-theme="light"] .hud-chip.fire,html[data-theme="light"] .hud-chip.fire b{color:var(--orange-text)!important}
:root{--bolt:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M13.8 1.8 4.2 13.6h6.2L9.2 22.2l10.6-12.4h-6.6z'/%3E%3C/svg%3E")}

/* ---------- sol gezinme (masaüstü) ---------- */
@media (min-width:900px){
  .top{position:fixed;left:0;top:0;width:var(--rail);height:auto;background:transparent;border:0;z-index:40}
  .top-in{padding:28px 24px 0;flex-wrap:wrap;align-items:flex-start}
  .brand{align-items:center}.brand-name{font-size:1.5rem;white-space:normal;overflow:visible}
  .top-right{position:fixed;top:14px;right:24px;margin:0;gap:6px;z-index:40;background:var(--bg);padding:4px 6px;border-radius:16px}
  .shell{grid-template-columns:var(--rail) minmax(0,1fr);max-width:none;min-height:100vh}
  .rail{top:0;height:100vh;height:100dvh;padding:112px 14px 16px;gap:6px;border-right:2px solid var(--line);background:var(--bg)}
  .main{padding:72px 40px 80px}
  .rl{flex-direction:row;justify-content:flex-start;gap:16px;min-height:52px;padding:8px 16px;border:2px solid transparent;border-radius:14px;color:var(--ink);font:800 .9375rem/1.1 var(--sans);letter-spacing:.07em;text-transform:uppercase}
  .rl:hover{background:var(--panel2);color:var(--ink)}
  .rl.on{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-text)}
  .rl .di{width:32px;height:32px;flex:none;fill:var(--ic)}
  .rl .ic{display:grid;place-items:center;width:32px;height:32px}
  .badge-n{margin-left:auto}
}
.rl .ic svg:not(.di){width:28px;height:28px}
@media (max-width:899px){
  .top-in{padding:0 14px}
  .brand-name{font-size:1.125rem}
  .main{padding:20px 16px calc(var(--tab) + 28px)}
  .tabbar{height:calc(var(--tab) + env(safe-area-inset-bottom));padding:6px 8px calc(6px + env(safe-area-inset-bottom));gap:4px;background:var(--bg);border-top:2px solid var(--line);align-items:center}
  .tabbar .rl{flex-direction:row;justify-content:center;min-height:52px;padding:0;border:2px solid transparent;border-radius:14px;margin:0 2px}
  .tabbar .rl.on{background:var(--blue-soft);border-color:var(--blue)}
  .tabbar .rl>span:not(.ic):not(.badge-n){position:absolute!important;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
  .tabbar .rl .di{width:30px;height:30px;fill:var(--ic)}
  .tabbar .badge-n{position:absolute;top:2px;right:6px;margin:0}
}
.badge-n{background:var(--bad);color:#fff;font:900 .75rem var(--sans);min-width:22px;height:22px;border:2px solid var(--bg)}
html[data-theme="light"] .badge-n{color:#fff}

/* =====================================================================
   tarih/ ve oop/ : sayfalar, yol, ders akışı (Duolingo biçimi)
   ===================================================================== */
.heading h1{font-weight:900}
.heading p,.course-intro p{color:var(--muted);font-weight:600}
.eyebrow{color:var(--violet);font-size:.75rem}
.bar,.pbar,.prog-bar,.xpbar,.meter{height:16px;border-radius:99px;background:var(--raise);overflow:hidden}
.bar i,.pbar i,.prog-bar i,.xpbar i,.meter i{position:relative;background:var(--accent);border-radius:99px;box-shadow:none}
.bar i::after,.pbar i::after,.prog-bar i::after,.xpbar i::after,.meter i::after{content:"";position:absolute;left:8px;right:8px;top:4px;height:4px;border-radius:4px;background:rgba(255,255,255,.35)}
.hero-academy{background:var(--bg);border:2px solid var(--line);border-radius:var(--r3);box-shadow:none}
.hero-copy h2{font-weight:900;color:var(--ink)}
.course-card,.card{border-radius:var(--r3)}
.course-card{border-bottom-width:var(--depth);background:var(--bg)}
.course-icon{background:var(--blue-soft);border:2px solid var(--blue);color:var(--blue-text);border-radius:20px;font-family:var(--sans);font-weight:900}
.course-icon.math{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-text)}
.course-icon.oop{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-text);font-family:var(--code);font-weight:600}
.status-chip{background:var(--accent-soft);color:var(--accent-text);border-radius:99px;font-size:.6875rem}
.stat-value{font:900 2rem var(--sans)}.stat-value.amber{color:var(--amber)}
html:not([data-theme="light"]) .stat-value.amber,html:not([data-theme="light"]) .scorecards b{color:var(--gold)}
.aside .card{box-shadow:none;border-radius:var(--r3)}
.aside-list b{color:var(--accent-text)}
.goal{border-left:0;border:2px solid var(--line);background:var(--panel2);border-radius:16px}

/* yol: renkli ünite başlığı, zikzak düğümler */
.path-wrap{max-width:600px}
.unit{margin-bottom:36px}
.unit-heading{background:var(--unit,var(--accent));border:0;border-top:0;border-radius:16px;box-shadow:0 var(--depth) 0 color-mix(in srgb,var(--unit,var(--accent)) 62%,#000);padding:18px 20px;color:#10260a}
.unit-heading .label{color:rgba(10,24,8,.78)!important}
.unit-heading h2{color:#10260a;font-weight:900;font-size:1.375rem}
.unit-heading small{color:rgba(10,24,8,.82);font-weight:700;font-size:.875rem}
.unit-symbol{display:grid;place-items:center;flex:none;width:52px;height:52px;border-radius:14px;background:rgba(255,255,255,.4);border-bottom:4px solid rgba(0,0,0,.18);color:#10260a;font:900 1.125rem var(--code)!important}
.path-nodes{gap:18px;padding:30px 0 8px}
.path-nodes:before{display:none}
.path-item{width:200px;gap:10px;transform:translateX(calc(var(--off,0px)*var(--offs,1)));margin-left:0!important;margin-right:0!important}
.path-item .circle{width:76px;height:70px;border-radius:50%;background:var(--raise);border:0;box-shadow:0 8px 0 #2b3a43;color:var(--muted);transition:transform .08s,box-shadow .08s}
html[data-theme="light"] .path-item .circle{background:#e5e5e5;box-shadow:0 8px 0 #cfcfcf}
.path-item .circle .di{width:34px;height:34px;fill:#fff}
.path-item:not(.available) .circle .di{fill:#52656d}
html[data-theme="light"] .path-item:not(.available) .circle .di{fill:#afafaf}
.path-item.available .circle,.path-item.done .circle{background:var(--unit,var(--accent));box-shadow:0 8px 0 color-mix(in srgb,var(--unit,var(--accent)) 62%,#000);color:#fff}
.path-item.checkpoint .circle{border-radius:50%}
.path-item.checkpoint.done .circle,.path-item.checkpoint.available .circle{background:var(--gold);box-shadow:0 8px 0 var(--gold-d)}
.path-item.checkpoint .circle .di{fill:#fff}
.path-item.checkpoint:not(.done):not(.available) .circle{background:var(--raise)}
.path-item.current .circle{outline:0}
.path-item.current .circle::before{content:"";position:absolute;inset:-9px -9px -1px;border-radius:50%;border:5px solid var(--raise);border-top-color:var(--unit,var(--accent));border-right-color:var(--unit,var(--accent));transform:rotate(-30deg);pointer-events:none}
.path-item .circle{position:relative}
.path-item:hover:not(:disabled) .circle{transform:translateY(-2px)}
.path-item:active:not(:disabled) .circle{transform:translateY(6px);box-shadow:0 2px 0 #2b3a43}
.path-item.available:active .circle,.path-item.done:active .circle{box-shadow:0 2px 0 color-mix(in srgb,var(--unit,var(--accent)) 62%,#000)}
.path-item span:last-child{background:transparent;color:var(--ink);font-weight:800;font-size:.875rem;line-height:1.25;padding:0}
.path-item:not(.available) span:last-child{color:var(--muted)}
.path-item .node-state{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);margin:-1px;white-space:nowrap}
.path-item.current .node-state{position:absolute!important;clip:auto;overflow:visible;width:auto;height:auto;margin:0;top:-46px;left:50%;transform:translateX(-50%);background:var(--bg);color:var(--unit-t,var(--accent-text));border:2px solid var(--line);border-radius:14px;padding:6px 14px;font:900 .8125rem var(--sans)!important;letter-spacing:.08em;animation:bob 1.6s ease-in-out infinite}
.path-item.current .node-state::after{content:"";position:absolute;left:50%;bottom:-8px;width:12px;height:12px;background:var(--bg);border-right:2px solid var(--line);border-bottom:2px solid var(--line);transform:translateX(-50%) rotate(45deg)}
.path-item.current{margin-top:36px!important}
@keyframes bob{50%{transform:translateX(-50%) translateY(-5px)}}
@media (max-width:560px){.path-item{--offs:.62;width:170px}.path-wrap{max-width:100%}}

/* ders akışı */
.lesson-page{max-width:640px;padding:22px 20px 190px}
.lesson-top{gap:16px;margin-bottom:34px}
.lesson-close{width:44px;height:44px;border-radius:14px}
.lesson-top .bar{height:16px}
.lesson-title{font-size:clamp(1.5rem,3.4vw,1.875rem);font-weight:900;margin-bottom:22px;line-height:1.25}
.lesson-meta .label{color:var(--muted)}
.lesson-body{font-size:1.125rem;font-weight:600;line-height:1.75;color:var(--ink)}
.speech{display:flex;align-items:flex-end;gap:14px;margin:22px 0}
.speech-m{flex:none;width:84px;line-height:0}
.bubble{position:relative;border:2px solid var(--line);border-radius:18px;padding:14px 18px;font-weight:700;line-height:1.5;background:var(--bg)}
.bubble::before{content:"";position:absolute;left:-9px;bottom:22px;width:14px;height:14px;background:var(--bg);border-left:2px solid var(--line);border-bottom:2px solid var(--line);transform:rotate(45deg)}
@media (max-width:480px){.speech{flex-direction:column;align-items:flex-start}.bubble::before{left:30px;top:-9px;bottom:auto;border:0;border-left:2px solid var(--line);border-top:2px solid var(--line)}.speech-m{order:-1}}
.term-pills a{border:2px solid var(--line);border-bottom-width:3px;border-radius:14px;background:var(--bg);color:var(--blue-text);font-weight:800;padding:6px 14px;text-decoration:none}
.source-line{border-top:2px solid var(--line)}
.question-options{gap:12px;margin:20px 0}
.choice{background:var(--bg);border:2px solid var(--line);border-bottom-width:var(--depth);border-radius:var(--r2);min-height:60px;padding:14px 18px;font:700 1.0625rem/1.35 var(--sans);color:var(--ink);transition:transform .06s,background .15s,border-color .15s}
.choice:hover:not(:disabled){background:var(--panel2)}
.choice:active:not(:disabled){transform:translateY(3px);border-bottom-width:1px;margin-bottom:3px}
.choice .num{border:2px solid var(--line);border-radius:10px;min-width:32px;height:32px;font:800 .875rem var(--sans);color:var(--muted)}
.choice.selected{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-text)}
.choice.selected .num{border-color:var(--blue);color:var(--blue-text)}
.choice.right{background:var(--ok-soft);border-color:var(--accent);color:var(--okt)}
.choice.right .num{border-color:var(--accent);color:var(--okt)}
.choice.wrong{background:var(--bad-soft);border-color:var(--bad);color:var(--badt)}
.choice.wrong .num{border-color:var(--bad);color:var(--badt)}
.choice:disabled{opacity:1}
.choice:disabled:not(.right):not(.wrong){opacity:.6}
pre.code{background:var(--panel2);border:2px solid var(--line);border-radius:var(--r2);font:500 .9375rem/1.7 var(--code)}

/* alt şerit: kontrol / geri bildirim */
.lesson-footer{border-top:2px solid var(--line);background:var(--bg);padding:20px 24px max(20px,env(safe-area-inset-bottom));transition:background .2s}
.lesson-footer-in{max-width:980px;gap:20px;min-height:64px}
.lesson-footer .btn{min-width:200px;min-height:54px}
.lesson-footer small{color:var(--muted);font-weight:700}
.lesson-footer.ok{background:var(--ok-soft);border-top-color:transparent}
.lesson-footer.no{background:var(--bad-soft);border-top-color:transparent}
.lesson-footer .btn.bad{background:var(--bad);border-color:var(--bad-d);color:var(--onbad,#2a0707)}
html[data-theme="light"] .lesson-footer .btn.bad{color:#fff}
.fb-sheet{flex:1;min-width:0;animation:sheet .22s cubic-bezier(.2,.8,.2,1)}
@keyframes sheet{from{transform:translateY(24px);opacity:0}to{transform:none;opacity:1}}
.feedback{display:flex;gap:16px;align-items:flex-start;border:0;background:transparent;margin:0;padding:0}
.feedback .fb-ic{flex:none;display:grid;place-items:center;width:56px;height:56px;border-radius:50%;background:#fff}
.feedback .fb-ic .di{width:30px;height:30px}
.feedback.ok .fb-ic .di{fill:#58a700}.feedback.no .fb-ic .di{fill:#ea2b2b}
.feedback strong{display:block;font:900 1.5rem/1.2 var(--sans)}
.feedback.ok strong{color:var(--okt)}.feedback.no strong{color:var(--badt)}
.feedback p{margin:2px 0 0;font-size:.9375rem;font-weight:700;line-height:1.45}
.feedback.ok p{color:var(--okt)}.feedback.no p{color:var(--badt)}
.feedback .fb-ans{font-size:1rem;font-weight:800}
.feedback .fb-why{font-weight:600}
@media (max-width:640px){
  .lesson-footer{padding:14px 16px max(14px,env(safe-area-inset-bottom))}
  .lesson-footer-in{flex-direction:column;align-items:stretch;gap:14px;min-height:0}
  .lesson-footer .btn{width:100%}
  .lesson-footer small{display:none}
  .feedback{gap:12px}.feedback .fb-ic{width:44px;height:44px}.feedback .fb-ic .di{width:24px;height:24px}.feedback strong{font-size:1.25rem}
  .lesson-page{padding:14px 16px 250px}
  .lesson-top{margin-bottom:22px}
}

/* tamamlanma */
.done-page{display:flex;flex-direction:column;align-items:center;text-align:center;padding-top:28px;max-width:640px}
.done-hero{position:relative;margin:6px 0 4px;line-height:0}
.done-m svg,.done-m img{animation:hop .7s cubic-bezier(.2,.9,.3,1.3) both;filter:drop-shadow(0 6px 0 rgba(0,0,0,.12))}
@keyframes hop{0%{transform:translateY(40px) scale(.7);opacity:0}100%{transform:none;opacity:1}}
.confetti{position:absolute;inset:-10px -60px 0;background:radial-gradient(circle at 12% 30%,var(--gold) 0 4px,transparent 5px),radial-gradient(circle at 88% 24%,var(--blue) 0 4px,transparent 5px),radial-gradient(circle at 20% 70%,var(--violet) 0 3px,transparent 4px),radial-gradient(circle at 80% 68%,var(--orange) 0 4px,transparent 5px),radial-gradient(circle at 4% 52%,var(--accent) 0 3px,transparent 4px),radial-gradient(circle at 96% 48%,var(--gold) 0 3px,transparent 4px);animation:pop .5s .3s both}
@keyframes pop{from{opacity:0;transform:scale(.8)}to{opacity:1;transform:none}}
.done-title{font-size:clamp(1.75rem,5vw,2.25rem);font-weight:900;color:var(--gold);margin:18px 0 6px}
html[data-theme="light"] .done-title{color:#a87400}
.done-sub{margin:0 0 24px;font-weight:700}
.stat-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;width:100%}
.stat-card{border:2px solid;border-radius:16px;overflow:hidden;background:var(--bg)}
.stat-h{padding:6px 4px;font:900 .6875rem var(--sans);letter-spacing:.08em;color:#10260a}
.stat-b{display:flex;align-items:center;justify-content:center;gap:8px;padding:14px 6px;font:900 1.5rem var(--sans)}
.stat-i .di{width:26px;height:26px;display:block;fill:var(--ic)}
.stat-card.xp{border-color:var(--gold)}.stat-card.xp .stat-h{background:var(--gold)}.stat-card.xp b{color:var(--gold)}
.stat-card.acc{border-color:var(--accent)}.stat-card.acc .stat-h{background:var(--accent)}.stat-card.acc b{color:var(--okt)}
.stat-card.seri{border-color:var(--orange)}.stat-card.seri .stat-h{background:var(--orange)}.stat-card.seri b{color:var(--orange)}
html[data-theme="light"] .stat-card.xp b{color:#8f6200}html[data-theme="light"] .stat-card.seri b{color:#a35a00}
.done-note{margin-top:22px;max-width:46ch}
@media (max-width:420px){.stat-b{font-size:1.2rem;gap:5px;padding:12px 2px}.stat-i .di{width:20px;height:20px}}
@media (prefers-reduced-motion:reduce){.done-m svg,.done-m img,.fb-sheet,.confetti,.path-item.current .node-state{animation:none}}

.brand-mascot{flex:none;display:block;overflow:visible}
@media (max-width:899px){
  .brand-name{white-space:nowrap}
  .course-switch{min-height:38px;padding:5px 11px;font-size:.6875rem!important;white-space:nowrap}
  .hud-xp,.hud-chip,#streak:not(:empty),.lv-n{white-space:nowrap;padding:0 6px;font-size:.9375rem!important}
  .top-in{gap:8px}
}

/* =====================================================================
   kabuk: ders seçimi, hesap, arkadaşlar, lig, yönetim
   ===================================================================== */
.page,.page.wide{max-width:1000px}
.heading h1{font-size:clamp(1.75rem,3.4vw,2.25rem)}
.grid2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.course{background:var(--bg);border:2px solid var(--line);border-bottom-width:var(--depth);border-radius:var(--r3);padding:22px;gap:14px}
.course::before{display:none}
.course:hover{background:var(--panel2)}
.course-ic{width:72px;height:72px;border-radius:20px;background:var(--cc);color:#fff;box-shadow:0 5px 0 color-mix(in srgb,var(--cc) 60%,#000)}
.course-ic svg{width:40px;height:40px;stroke-width:2.6}
.course .eyebrow{color:var(--muted)}
.course h2{font-size:1.25rem;font-weight:900}
.course p{font-weight:600}
.course .meta{font:800 .8125rem var(--sans);letter-spacing:.02em;color:var(--muted)}
.course .meta b{color:var(--ink)}
.course .btn{justify-self:stretch}
.course.mat{--cc:#58cc02}.course.tarih{--cc:#ce82ff}.course.oop{--cc:#1cb0f6}
.pbar i{background:var(--cc,var(--accent))}
.pbar{height:16px}
.strip{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.tile{background:var(--bg);border:2px solid var(--line);border-radius:16px;padding:14px 16px}
.tile b{font:900 1.625rem var(--sans)}.tile b.amber{color:var(--orange)}
html[data-theme="light"] .tile b.amber{color:var(--orange-text)}
.tile span{font-weight:700}
.callout.tip,.callout{border:2px solid var(--line);border-radius:var(--r3);background:var(--panel2)}
.callout.tip{background:var(--accent-soft);border-color:var(--accent)}
.notice-b{background:var(--blue-soft);border:2px solid var(--blue);border-radius:16px;color:var(--ink)}
.person{background:var(--bg);border:2px solid var(--line);border-radius:16px;padding:12px 16px}
.person.me{border-color:var(--blue);background:var(--blue-soft)}
.person .who b{font-weight:800}.person .nums{font:900 .9375rem var(--sans)}.person .nums .fire{color:var(--orange)}
html[data-theme="light"] .person .nums .fire{color:var(--orange-text)}
.rank{font:900 1.125rem var(--sans);color:var(--muted)}
.podium{gap:12px}
.pod{background:var(--bg);border:2px solid var(--line);border-bottom-width:var(--depth);border-radius:18px}
.pod.p1{border-color:var(--gold);background:var(--amber-soft)}
.av{border:0;box-shadow:inset 0 -4px 0 rgba(0,0,0,.18);font-family:var(--sans);font-weight:900;color:#10260a}
.tag{border-radius:99px;font-size:.6875rem;background:var(--raise);color:var(--ink)}
.tag.ok{background:var(--ok-soft);color:var(--okt)}.tag.bad{background:var(--bad-soft);color:var(--badt)}.tag.adm{background:var(--violet-soft);color:var(--violet)}
.empty{border:2px dashed var(--line);border-radius:var(--r3);color:var(--muted);font-weight:700}
.tbl-w{border:2px solid var(--line);border-radius:16px}.tbl-w th{background:var(--panel2);font-family:var(--sans);font-weight:800}
.auth .card{border-radius:var(--r3)}
.go{background:transparent}
.go .course-ic{width:128px;height:128px;border-radius:36px}
.go .course-ic svg{width:70px;height:70px}
.go h1{font-weight:900}
.go-bar{height:16px}.go-bar i{background:var(--cc)}
.spark i{background:var(--accent);border-radius:6px 6px 0 0}
.code-b{background:var(--panel2);border:2px solid var(--line);font-family:var(--code)}
#notice.show,#notice:not(:empty){background:var(--ink);color:var(--bg);border:0;border-radius:16px;font-weight:800;box-shadow:var(--sh2)}
dialog{background:var(--bg);color:var(--ink);border:2px solid var(--line);border-radius:24px}
dialog::backdrop{background:rgba(0,0,0,.6)}
.hud-chip .hud-ic .di,.hud-chip .di{width:22px;height:22px;fill:var(--ic)}
.hud-chip.xp{display:inline-flex}
.hud-chip.xp::before{content:"";width:20px;height:20px;background:var(--gold);-webkit-mask:var(--bolt) center/contain no-repeat;mask:var(--bolt) center/contain no-repeat}
html[data-theme="light"] .hud-chip.xp::before{background:#d9a900}
.hud-chip.fire b,.hud-chip.xp b{font-weight:900}

/* matematik ders alt çubuğu: 3B düğmeler */
.lfoot-in .btn.ghost{background:var(--bg);border:2px solid var(--line);border-bottom-width:4px;color:var(--blue-text)}
.lfoot-in .btn.ghost:hover{background:var(--panel2)}
.lfoot-in .btn.sm{min-width:0}
.seg-b.on{color:var(--accent-text);border:2px solid var(--line);border-bottom-width:4px;min-height:44px}
.step-no{color:var(--accent-text)}
@media (prefers-color-scheme:light){html:not([data-theme="dark"]) .hud-xp,html:not([data-theme="dark"]) .hud-chip.xp b,html:not([data-theme="dark"]) .lv-n,html:not([data-theme="dark"]) #streak:not(:empty){color:var(--amber)!important}}

/* marka: Cavra logosu (EPS'ten çevrilmiş vektör) */
.brand{display:inline-flex;align-items:center;min-height:48px}
.brand-name{position:absolute!important;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.brand-logo{display:none;height:44px;width:auto;flex:none}
.brand-icon{display:none;height:42px;width:auto;flex:none}
.brand .bl-dark{display:block}
html[data-theme="light"] .brand .bl-dark{display:none}html[data-theme="light"] .brand .bl-light{display:block}
@media (prefers-color-scheme:light){html:not([data-theme="dark"]) .brand .bl-dark{display:none}html:not([data-theme="dark"]) .brand .bl-light{display:block}}
@media (max-width:559px){.brand .brand-logo,html[data-theme="light"] .brand .bl-light,html:not([data-theme="dark"]) .brand .bl-light{display:none!important}.brand .brand-icon{display:block}}
@media (min-width:560px){.brand .brand-icon{display:none!important}}
/* maskot */
.mascot{display:block;height:auto;max-width:100%;filter:drop-shadow(0 6px 0 rgba(0,0,0,.14))}
.mascot-cheer{animation:mascot-hop 1.4s ease-in-out infinite}
.mascot-oops{transform:rotate(-4deg)}
.mascot-think{transform:rotate(3deg)}
@keyframes mascot-hop{0%,100%{transform:translateY(0)}45%{transform:translateY(-10px) rotate(-2deg)}}
@media (prefers-reduced-motion:reduce){.mascot-cheer{animation:none}}

/* ortak sol menü grubu (Dersler · Arkadaşlar · Lig · Hesap) */
.rail-sep{height:2px;margin:10px 6px;background:var(--line);border-radius:2px}
@media (max-width:899px){.rail-sep,.rl-desk{display:none!important}.rl-plat:not(:last-child){display:none}}
@media (max-width:899px){.tabbar{grid-template-columns:none!important;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr)}.tabbar .rl{margin:0}}

/* =====================================================================
   hareket: açılış ekranı, sayfa geçişi, küçük tatlı animasyonlar
   ===================================================================== */
.splash{display:grid;place-items:center;transition:opacity .4s ease,visibility .4s}
.splash.out{opacity:0;visibility:hidden}
.splash.leave{opacity:0;transition:opacity .22s ease}.splash.leave.in{opacity:1}
.sp-in{display:grid;justify-items:center;gap:6px}
.sp-mascot{width:min(34vw,150px);height:auto;animation:sp-pop .7s cubic-bezier(.2,1.2,.3,1) both,sp-bob 1.3s .7s ease-in-out infinite;filter:drop-shadow(0 8px 0 rgba(0,0,0,.14))}
.sp-word{width:min(46vw,190px);height:auto;animation:sp-rise .55s .25s cubic-bezier(.2,.9,.3,1) both}
.sp-bar{width:min(48vw,190px);height:10px;border-radius:99px;background:rgba(127,127,127,.25);overflow:hidden;margin-top:18px;animation:sp-rise .5s .45s both}
.sp-bar i{display:block;height:100%;width:100%;background:#58cc02;border-radius:99px;transform-origin:left;animation:sp-load 1.05s .3s cubic-bezier(.4,0,.2,1) both;box-shadow:inset 0 3px 0 rgba(255,255,255,.35)}
.splash.leave .sp-mascot,.splash.leave .sp-word,.splash.leave .sp-bar{animation-delay:0s}
@keyframes sp-pop{0%{opacity:0;transform:translateY(24px) scale(.6) rotate(-6deg)}100%{opacity:1;transform:none}}
@keyframes sp-bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px) rotate(1.5deg)}}
@keyframes sp-rise{0%{opacity:0;transform:translateY(14px)}100%{opacity:1;transform:none}}
@keyframes sp-load{0%{transform:scaleX(.04)}100%{transform:scaleX(1)}}

/* görünüm girişi: yalnızca opaklık + hafif kayma; bitince dönüşüm kalmaz (sabit konumlu çocukları bozmaz) */
#main>*{animation:view-in .34s cubic-bezier(.2,.8,.2,1) backwards}
@keyframes view-in{0%{opacity:0;transform:translateY(12px)}100%{opacity:1;transform:none}}
/* kademeli giriş */
.course-cards>*,.cards>*,.stat-row>*,.tiles>*,.path-nodes>*,.resource-grid>*,.stat-cards>*,.people>*,.person-list>*{animation:rise-in .42s cubic-bezier(.2,.8,.2,1) backwards}
.course-cards>*:nth-child(2),.cards>*:nth-child(2),.tiles>*:nth-child(2),.path-nodes>*:nth-child(2),.resource-grid>*:nth-child(2),.stat-cards>*:nth-child(2){animation-delay:.06s}
.course-cards>*:nth-child(3),.cards>*:nth-child(3),.tiles>*:nth-child(3),.path-nodes>*:nth-child(3),.resource-grid>*:nth-child(3),.stat-cards>*:nth-child(3){animation-delay:.12s}
.course-cards>*:nth-child(4),.cards>*:nth-child(4),.tiles>*:nth-child(4),.path-nodes>*:nth-child(4),.resource-grid>*:nth-child(4){animation-delay:.18s}
.path-nodes>*:nth-child(n+5),.resource-grid>*:nth-child(n+5){animation-delay:.22s}
@keyframes rise-in{0%{opacity:0;transform:translateY(16px) scale(.98)}100%{opacity:1;transform:none}}
/* etkileşim */
.course,.course-card,.card.link,.tile,.resource-grid .card{transition:transform .18s cubic-bezier(.2,.8,.2,1),border-color .18s,box-shadow .18s}
@media (hover:hover){.course:hover,.course-card:hover,.resource-grid .card:hover{transform:translateY(-3px)}}
.btn,.choice,.rl,.icon-btn,.path-item .circle{transition:transform .12s ease,background-color .18s,border-color .18s,color .18s,filter .18s}
.rl:active{transform:scale(.97)}
.rl.on .ic svg,.rl.on .di{animation:icon-pop .4s cubic-bezier(.2,1.4,.4,1)}
@keyframes icon-pop{0%{transform:scale(.7)}100%{transform:none}}
.bar i,.go-bar i,.lbar i,.lv-bar i{transition:width .7s cubic-bezier(.2,.8,.2,1)}
.choice.right{animation:ans-pop .38s cubic-bezier(.2,1.4,.4,1)}
.choice.wrong,.opt.bad{animation:ans-shake .42s ease}
@keyframes ans-pop{0%{transform:scale(.97)}60%{transform:scale(1.025)}100%{transform:none}}
@keyframes ans-shake{0%,100%{transform:none}20%{transform:translateX(-7px)}40%{transform:translateX(6px)}60%{transform:translateX(-4px)}80%{transform:translateX(3px)}}
.path-item.current .circle{animation:node-pulse 2s ease-in-out infinite}
@keyframes node-pulse{0%,100%{transform:none}50%{transform:translateY(-4px)}}
.node-state{animation:bubble-bob 1.6s ease-in-out infinite}
@keyframes bubble-bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
.mascot-happy,.mascot-think{animation:mascot-idle 3.2s ease-in-out infinite}
@keyframes mascot-idle{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
.go-logo{display:grid;place-items:center;margin-bottom:6px}
.go .course-ic{animation:sp-pop .6s .15s cubic-bezier(.2,1.2,.3,1) both}
.go h1,.go .eyebrow,.go p{animation:sp-rise .5s .3s both}
#notice:not(:empty){animation:toast-in .3s cubic-bezier(.2,1.2,.3,1)}
@keyframes toast-in{0%{opacity:0;transform:translate(-50%,16px) scale(.96)}100%{opacity:1;transform:translateX(-50%)}}
dialog[open]{animation:dlg-in .26s cubic-bezier(.2,1.1,.3,1)}
dialog[open]::backdrop{animation:fade-in .26s ease}
@keyframes dlg-in{0%{opacity:0;transform:translateY(14px) scale(.96)}100%{opacity:1;transform:none}}
@keyframes fade-in{0%{opacity:0}100%{opacity:1}}
.bump{animation:xp-bump .55s cubic-bezier(.2,1.5,.4,1)}
@keyframes xp-bump{0%{transform:scale(1)}35%{transform:scale(1.28)}100%{transform:scale(1)}}
/* tema geçişi */
html.theme-anim *,html.theme-anim *::before,html.theme-anim *::after{transition:background-color .35s ease,color .35s ease,border-color .35s ease,fill .35s ease!important}
/* konfeti */
.cf{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.cf i{position:absolute;top:-12px;left:var(--x);width:9px;height:14px;border-radius:2px;background:var(--c);transform:rotate(var(--r));animation:cf-fall var(--t) var(--d) cubic-bezier(.3,.4,.5,1) both}
@keyframes cf-fall{0%{opacity:1;transform:translateY(0) rotate(var(--r))}100%{opacity:0;transform:translateY(380px) rotate(calc(var(--r) + 540deg))}}
.done-page,.done-screen{position:relative}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-delay:0s!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}