/* ═══════════════════════════════════════
   ÇİZGE ŞEHİR — shared.css
   siteadi.com/dijkstra  /bfs  /dfs
═══════════════════════════════════════ */
:root{
  --bg:#09111e; --p1:#0f1c2e; --p2:#162032; --p3:#1d2b3f;
  --b1:#1e2e42; --b2:#27405c;
  --t1:#dce8f5; --t2:#6e8aa4; --t3:#334d66;
  --blue:#4f8eff; --yellow:#f0c040; --green:#00cc96; --red:#f04060; --orange:#f08040;
  --ba:rgba(79,142,255,.14); --ya:rgba(240,192,64,.14); --ga:rgba(0,204,150,.14);
}
*{margin:0;padding:0;box-sizing:border-box;}
body{background:var(--bg);color:var(--t1);font-family:'Space Grotesk',sans-serif;height:100vh;overflow:hidden;display:flex;flex-direction:column;}
.mono{font-family:'JetBrains Mono',monospace;}

/* ─── INTRO ─── */
#introScreen{
  position:fixed;inset:0;background:var(--bg);z-index:500;
  display:flex;align-items:flex-start;justify-content:center;
  padding:48px 28px 48px;overflow-y:auto;
}
.intro-wrap{max-width:760px;width:100%;}
.badge{display:inline-flex;align-items:center;gap:7px;font-family:'JetBrains Mono';font-size:.72rem;color:var(--green);
  border:1px solid rgba(0,204,150,.35);background:rgba(0,204,150,.07);padding:6px 15px;border-radius:20px;margin-bottom:30px;letter-spacing:.05em;}
.badge .blip{width:6px;height:6px;border-radius:50%;background:var(--green);animation:pulse 1.6s infinite;}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.2}}
.intro-title-block{margin-bottom:20px;}
.intro-title-block h1{font-size:clamp(3.2rem,7vw,5rem);font-weight:700;line-height:1.0;letter-spacing:-.02em;color:var(--t1);}
.intro-title-block h1 em{font-style:normal;}
.intro-lead{color:var(--t2);font-size:1rem;line-height:1.82;margin-bottom:32px;max-width:700px;}
.intro-lead strong{color:var(--t1);}
.intro-section{background:var(--p1);border:1px solid var(--b1);border-radius:14px;padding:24px 26px;margin-bottom:16px;}
.intro-section-title{display:flex;align-items:center;gap:9px;font-size:1.05rem;font-weight:700;color:var(--t1);margin-bottom:13px;}
.intro-section p{font-size:.9rem;color:var(--t2);line-height:1.72;margin-bottom:0;}
.algo-section{background:var(--p1);border:1px solid var(--b1);border-radius:14px;padding:24px 26px;margin-bottom:16px;}
.algo-section-title{display:flex;align-items:center;gap:9px;font-size:1.05rem;font-weight:700;color:var(--t1);margin-bottom:6px;}
.algo-section-sub{font-size:.88rem;color:var(--t2);margin-bottom:18px;}
.algo-desc-block{margin-bottom:11px;font-size:.9rem;line-height:1.72;}
.algo-desc-block:last-of-type{margin-bottom:0;}
.algo-name{font-weight:700;}
.algo-name.d{color:var(--blue);}
.algo-name.b{color:var(--yellow);}
.algo-name.g{color:var(--green);}
.algo-quote{font-style:italic;color:var(--t3);}
.algo-pills{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px;}
.apill{font-family:'JetBrains Mono';font-size:.76rem;padding:8px 16px;border-radius:7px;border:1px solid;cursor:default;}
.apill.d{color:var(--blue);border-color:rgba(79,142,255,.5);background:var(--ba);}
.apill.b{color:var(--yellow);border-color:rgba(240,192,64,.5);background:var(--ya);}
.apill.f{color:var(--green);border-color:rgba(0,204,150,.5);background:var(--ga);}
.diff-section{background:var(--p1);border:1px solid var(--b1);border-radius:14px;padding:24px 26px;margin-bottom:24px;}
.diff-section h2{font-size:1.05rem;font-weight:700;color:var(--t1);margin-bottom:16px;}
.difficulty-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
@media(max-width:560px){.difficulty-grid{grid-template-columns:1fr;}}
.diff-card{background:var(--p2);border:1px solid var(--b1);border-radius:10px;padding:16px;}
.diff-card .dlabel{font-family:'JetBrains Mono';font-size:.67rem;color:var(--t3);text-transform:uppercase;letter-spacing:.07em;margin-bottom:8px;}
.diff-card p{font-size:.84rem;color:var(--t2);line-height:1.58;}
.btn-start{background:var(--blue);color:#04101f;font-weight:700;font-size:1rem;
  padding:16px 36px;border-radius:10px;border:none;cursor:pointer;
  transition:transform .15s,box-shadow .15s;display:inline-flex;align-items:center;gap:10px;}
.btn-start:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(79,142,255,.4);}

/* algo nav links on intro */
.algo-nav{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px;}
.algo-nav a{font-family:'JetBrains Mono';font-size:.78rem;padding:8px 18px;border-radius:7px;border:1px solid var(--b2);
  color:var(--t2);text-decoration:none;transition:all .15s;}
.algo-nav a:hover{color:var(--t1);border-color:var(--blue);}
.algo-nav a.active-d{color:var(--blue);border-color:rgba(79,142,255,.6);background:var(--ba);}
.algo-nav a.active-b{color:var(--yellow);border-color:rgba(240,192,64,.6);background:var(--ya);}
.algo-nav a.active-f{color:var(--green);border-color:rgba(0,204,150,.6);background:var(--ga);}

/* ─── ALGO SELECT ─── */
#algoScreen{position:fixed;inset:0;background:rgba(9,17,30,.96);backdrop-filter:blur(8px);
  z-index:400;display:none;align-items:center;justify-content:center;padding:20px;}
#algoScreen.show{display:flex;}
.asc{background:var(--p1);border:1px solid var(--b2);border-radius:16px;max-width:600px;width:100%;padding:32px;
  max-height:88vh;overflow-y:auto;}
.mission-info{background:var(--bg);border:1px solid var(--b1);border-radius:10px;padding:16px 18px;margin-bottom:24px;}
.mission-info .mi-meta{font-family:'JetBrains Mono';font-size:.67rem;color:var(--t3);text-transform:uppercase;letter-spacing:.07em;margin-bottom:8px;}
.mission-info h3{font-size:1.05rem;margin-bottom:7px;}
.mission-info p{font-size:.85rem;color:var(--t2);line-height:1.65;}
.pick-label{font-family:'JetBrains Mono';font-size:.67rem;color:var(--t3);text-transform:uppercase;letter-spacing:.07em;margin-bottom:12px;}
.ao-list{display:flex;flex-direction:column;gap:10px;}
.ao{background:var(--p2);border:2px solid var(--b1);border-radius:10px;
  padding:15px 18px;cursor:pointer;transition:all .18s;display:flex;align-items:flex-start;gap:14px;}
.ao:hover{border-color:var(--b2);background:var(--p3);}
.ao.sel{border-color:var(--blue);background:var(--ba);}
.ao.ok{border-color:var(--green)!important;background:var(--ga)!important;}
.ao.no{border-color:var(--red)!important;opacity:.45;}
.ao-ico{font-size:1.25rem;margin-top:1px;flex-shrink:0;}
.ao-title{font-weight:600;font-size:.93rem;margin-bottom:3px;}
.ao-desc{font-size:.81rem;color:var(--t2);line-height:1.5;}
.ao-when{font-size:.78rem;color:var(--t3);margin-top:5px;font-style:italic;}
.ao-detail-toggle{font-family:'JetBrains Mono';font-size:.72rem;color:var(--t3);margin-top:8px;
  display:inline-flex;align-items:center;gap:5px;cursor:pointer;transition:color .15s;}
.ao-detail-toggle:hover{color:var(--blue);}
.ao-detail-toggle .dt-arrow{transition:transform .2s;display:inline-block;}
.ao-detail-toggle.open .dt-arrow{transform:rotate(180deg);}
.ao-detail{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.ao-detail.open{max-height:600px;}
.ao-detail p{font-size:.81rem;color:var(--t2);line-height:1.65;
  background:var(--bg);border:1px solid var(--b1);border-radius:7px;padding:9px 11px;margin-top:8px;}
.ao-detail p b{color:var(--t1);}
.asc-footer{display:flex;align-items:center;gap:12px;margin-top:18px;}
.btn-confirm{background:var(--blue);color:#04101f;font-weight:700;font-size:.9rem;
  padding:11px 24px;border-radius:8px;border:none;cursor:pointer;transition:all .15s;flex-shrink:0;}
.btn-confirm:disabled{opacity:.3;cursor:not-allowed;}
.btn-confirm:not(:disabled):hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(79,142,255,.3);}
.feedback-text{font-size:.82rem;color:var(--t2);line-height:1.55;}

/* ─── HEADER ─── */
header{display:flex;align-items:center;justify-content:space-between;
  padding:11px 22px;border-bottom:1px solid var(--b1);
  background:rgba(9,17,30,.92);flex-shrink:0;z-index:10;}
.brand{font-weight:700;font-size:.97rem;display:flex;align-items:center;gap:7px;}
.brand-dot{width:7px;height:7px;border-radius:50%;background:var(--blue);box-shadow:0 0 7px var(--blue);}
.hud{display:flex;gap:18px;align-items:center;}
.hud-item{font-family:'JetBrains Mono';font-size:.77rem;color:var(--t2);display:flex;gap:5px;align-items:center;}
.hud-item b{color:var(--t1);}
.hearts{display:flex;gap:3px;}
.heart{width:12px;height:12px;}
.bölüm-tag{font-family:'JetBrains Mono';font-size:.68rem;padding:4px 11px;border-radius:14px;
  background:var(--ba);color:var(--blue);border:1px solid rgba(79,142,255,.3);}

/* ─── LAYOUT ─── */
.main{display:flex;flex:1;overflow:hidden;}

/* ─── SIDEBAR ─── */
.side{width:200px;border-right:1px solid var(--b1);padding:16px;display:flex;flex-direction:column;gap:16px;overflow-y:auto;flex-shrink:0;}
.sb-lbl{font-family:'JetBrains Mono';font-size:.65rem;color:var(--t3);text-transform:uppercase;letter-spacing:.08em;margin-bottom:7px;}
.struct-list{display:flex;flex-direction:column;gap:4px;min-height:28px;}
.si{font-family:'JetBrains Mono';font-size:.75rem;padding:6px 9px;border-radius:5px;
  background:var(--p2);border:1px solid var(--b2);display:flex;justify-content:space-between;
  animation:slin .18s ease;}
@keyframes slin{from{opacity:0;transform:translateX(-5px)}to{opacity:1;transform:translateX(0)}}
.si.top{border-color:var(--yellow);color:var(--t1);}
.si .sv{color:var(--yellow);}
.leg-item{display:flex;align-items:center;gap:7px;font-size:.79rem;color:var(--t2);margin-bottom:6px;}
.leg-dot{width:9px;height:9px;border-radius:50%;flex-shrink:0;}
.inst-box{font-size:.8rem;color:var(--t2);line-height:1.65;background:var(--bg);border:1px solid var(--b1);border-radius:7px;padding:10px 12px;}
.inst-box b{color:var(--t1);}
.hint-row{margin-top:6px;font-family:'JetBrains Mono';font-size:.7rem;color:var(--yellow);
  background:rgba(240,192,64,.06);border:1px solid rgba(240,192,64,.2);border-radius:5px;padding:6px 8px;line-height:1.5;}
.score-pill{background:var(--p2);border:1px solid var(--b1);border-radius:7px;padding:10px 12px;}
.score-pill .spv{font-family:'JetBrains Mono';font-size:1.2rem;font-weight:700;color:var(--blue);}
.score-pill .spl{font-size:.68rem;color:var(--t3);margin-top:2px;}
.btn-skip{font-family:'JetBrains Mono';font-size:.72rem;width:100%;padding:7px;border-radius:6px;border:1px solid var(--b2);background:transparent;color:var(--t2);cursor:pointer;transition:all .15s;}
.btn-skip:hover{color:var(--t1);border-color:var(--blue);}

/* ─── CANVAS ─── */
.canvas-wrap{flex:1;position:relative;display:flex;align-items:center;justify-content:center;padding:18px;}
#gameSvg{width:100%;height:100%;cursor:pointer;}

/* ─── TOAST ─── */
.toast{position:absolute;top:14px;left:50%;transform:translateX(-50%) translateY(-10px);
  background:var(--p2);border:1px solid var(--b2);padding:8px 16px;border-radius:7px;
  font-family:'JetBrains Mono';font-size:.8rem;opacity:0;transition:all .28s;
  pointer-events:none;z-index:20;white-space:nowrap;}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
.toast.good{border-color:var(--green);color:var(--green);}
.toast.bad{border-color:var(--red);color:var(--red);}

/* ─── RESULTS ─── */
.res-overlay{position:absolute;inset:0;background:rgba(9,17,30,.94);backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;opacity:0;
  pointer-events:none;transition:opacity .28s;z-index:30;}
.res-overlay.show{opacity:1;pointer-events:auto;}
.res-card{background:var(--p2);border:1px solid var(--b2);border-radius:15px;
  padding:30px 34px;text-align:center;max-width:360px;width:90%;}
.ri{font-size:2.2rem;margin-bottom:7px;}
.res-card h3{font-size:1.35rem;margin-bottom:5px;}
.res-card .rs{color:var(--t2);font-size:.85rem;margin-bottom:18px;line-height:1.6;}
.why-box{background:var(--bg);border:1px solid var(--b1);border-radius:7px;padding:12px 14px;margin-bottom:18px;font-size:.82rem;color:var(--t2);line-height:1.6;text-align:left;}
.why-box b{color:var(--t1);}
.r-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-bottom:18px;}
.rstat{background:var(--bg);border:1px solid var(--b1);border-radius:8px;padding:11px;}
.rstat .rv{font-family:'JetBrains Mono';font-size:1.15rem;font-weight:700;color:var(--blue);}
.rstat .rl{font-size:.66rem;color:var(--t3);margin-top:2px;}
.btn-next{background:var(--blue);color:#04101f;font-weight:700;font-size:.9rem;padding:12px;border-radius:7px;border:none;cursor:pointer;width:100%;transition:transform .15s;}
.btn-next:hover{transform:translateY(-1px);}

/* ─── END SCREEN ─── */
#endScreen{position:fixed;inset:0;background:var(--bg);z-index:600;
  display:none;align-items:center;justify-content:center;flex-direction:column;padding:24px;text-align:center;}
#endScreen.show{display:flex;}
#endScreen h2{font-size:2rem;margin-bottom:12px;}
#endScreen p{color:var(--t2);font-size:.95rem;line-height:1.75;max-width:460px;margin-bottom:24px;}
.final-score{font-family:'JetBrains Mono';font-size:2.8rem;font-weight:700;color:var(--blue);margin-bottom:4px;}
.final-lbl{font-size:.8rem;color:var(--t3);margin-bottom:28px;}