/* Devre Kuramı Sanal Laboratuvarı — ortak stil */
:root{
  --bg:#eef1f5; --panel:#ffffff; --ink:#1d2433; --muted:#5b6578; --line:#d5dbe5;
  --accent:#0b5cad; --accent2:#e07a10; --ok:#1a8a4a; --bad:#c62828; --warn:#b26a00;
  --ch1:#f2d21b; --ch2:#27c4f0; --lcd:#c9d9b8; --lcdink:#1b2614;
  --metal1:#3a3f47; --metal2:#23272d;
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink)}
body{min-height:100vh}
a{color:var(--accent)}
button{font:inherit;cursor:pointer}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:16px;padding:10px 20px;
  background:linear-gradient(90deg,#0b2a4a,#0b5cad);color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.25)}
.topbar h1{font-size:18px;margin:0;font-weight:600}
.topbar .sub{opacity:.8;font-size:13px}
.topbar .grow{flex:1}
.topbar input{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);color:#fff;border-radius:6px;padding:5px 8px;width:150px}
.topbar input::placeholder{color:rgba(255,255,255,.6)}
.progress{width:140px;height:8px;background:rgba(255,255,255,.2);border-radius:4px;overflow:hidden}
.progress>div{height:100%;background:#7ee08a;width:0;transition:width .4s}
.layout{display:grid;grid-template-columns:230px 1fr;min-height:calc(100vh - 52px)}
nav.side{background:#0f1b2b;color:#cfd8e6;padding:14px 10px;position:sticky;top:52px;height:calc(100vh - 52px);overflow:auto}
nav.side button{display:flex;align-items:center;gap:8px;width:100%;text-align:left;background:none;border:0;color:inherit;padding:9px 10px;border-radius:7px;font-size:14px}
nav.side button:hover{background:rgba(255,255,255,.07)}
nav.side button.active{background:#0b5cad;color:#fff}
nav.side .dot{width:9px;height:9px;border-radius:50%;border:2px solid #6c7a90;flex:none}
nav.side .dot.done{background:#7ee08a;border-color:#7ee08a}
nav.side .hint{font-size:11.5px;opacity:.65;padding:12px 10px;line-height:1.5}
main{padding:20px 24px 60px;max-width:1500px}
section.page{display:none}
section.page.active{display:block}
h2{margin:0 0 4px;font-size:22px}
h3{margin:18px 0 8px;font-size:16px}
.lead{color:var(--muted);margin:0 0 16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin-bottom:14px}
.grid2{display:grid;grid-template-columns:minmax(300px,380px) 1fr;gap:16px;align-items:start}
.grid-half{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:1100px){.grid2,.grid-half{grid-template-columns:1fr}.layout{grid-template-columns:1fr}
  nav.side{position:sticky;top:0;z-index:15;height:auto;display:flex;overflow-x:auto;padding:6px}
  nav.side button{width:auto;white-space:nowrap}nav.side .hint{display:none}
  .topbar{position:static;flex-wrap:wrap;gap:8px}.topbar .sub{display:none}.topbar h1{font-size:15px}
  main{padding:14px}.scopewrap{min-width:0!important}.scopewrap .row{flex-wrap:wrap!important}}
.info{background:#eaf2fc;border-left:4px solid var(--accent);padding:10px 12px;border-radius:6px;font-size:14px;line-height:1.55;margin:8px 0}
.warnbox{background:#fff4e2;border-left:4px solid var(--accent2);padding:10px 12px;border-radius:6px;font-size:14px;line-height:1.55;margin:8px 0}
.eq{font-family:"Cambria Math","Cambria","Times New Roman",serif;font-size:16px;background:#f6f8fb;border:1px solid var(--line);padding:6px 10px;border-radius:6px;display:inline-block;margin:4px 0}
ol.steps{padding-left:0;list-style:none;counter-reset:s;margin:0}
ol.steps li{counter-increment:s;position:relative;padding:8px 8px 8px 40px;border-bottom:1px dashed var(--line);font-size:14px;line-height:1.5}
ol.steps li::before{content:counter(s);position:absolute;left:6px;top:8px;width:24px;height:24px;border-radius:50%;background:#dfe7f2;color:var(--accent);font-weight:700;display:grid;place-items:center;font-size:13px}
ol.steps li.done::before{content:"✓";background:var(--ok);color:#fff}
ol.steps li.done{color:var(--muted)}
.btn{background:var(--accent);color:#fff;border:0;border-radius:7px;padding:7px 14px;font-size:14px}
.btn:hover{filter:brightness(1.1)}
.btn.sec{background:#e3e9f2;color:var(--ink)}
.btn.warn{background:var(--accent2)}
.btn.small{padding:4px 10px;font-size:13px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
select,input[type=number],input[type=text]{font:inherit;padding:5px 8px;border:1px solid var(--line);border-radius:6px;background:#fff}
kbd{background:#f0f2f6;border:1px solid #c8cfda;border-bottom-width:2px;border-radius:4px;padding:0 5px;font-size:12px;font-family:Consolas,monospace}
table.data{border-collapse:collapse;width:100%;font-size:13px}
table.data th,table.data td{border:1px solid var(--line);padding:4px 7px;text-align:right}
table.data th{background:#f1f4f9;text-align:center}
table.data td.l{text-align:left}
.tablewrap{max-height:260px;overflow:auto}
.q{border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin:8px 0;background:#fbfcfe}
.q .qt{font-weight:600;margin-bottom:6px;font-size:14px;line-height:1.5}
.q label{display:block;padding:3px 0;font-size:14px;cursor:pointer}
.q .fb{margin-top:6px;font-size:13.5px;line-height:1.5}
.fb.ok{color:var(--ok)} .fb.bad{color:var(--bad)}
.badge{display:inline-block;font-size:11.5px;padding:1px 7px;border-radius:10px;background:#e3e9f2;color:var(--muted);font-weight:600}
.badge.ok{background:#dff3e6;color:var(--ok)} .badge.bad{background:#fde3e3;color:var(--bad)}

/* ---- Tezgâh / cihazlar ---- */
.bench{background:linear-gradient(#5d4a37,#4a3a2a);border-radius:12px;padding:14px;box-shadow:inset 0 0 40px rgba(0,0,0,.35)}
.bench-row{display:flex;gap:12px;flex-wrap:wrap;align-items:stretch}
.inst{background:linear-gradient(#e6e8ec,#c8ccd3);border-radius:8px;padding:8px 10px 10px;box-shadow:0 3px 0 #8d939c,0 6px 14px rgba(0,0,0,.4);position:relative;min-width:150px}
.inst.dark{background:linear-gradient(var(--metal1),var(--metal2));color:#dfe3ea;box-shadow:0 3px 0 #111,0 6px 14px rgba(0,0,0,.45)}
.inst .brand{font-size:10.5px;font-weight:700;letter-spacing:.08em;opacity:.75;text-transform:uppercase;display:flex;justify-content:space-between;gap:10px;margin-bottom:6px}
.inst .ctrls{display:flex;gap:6px;align-items:flex-end;flex-wrap:wrap}
.lcd{background:var(--lcd);color:var(--lcdink);border-radius:4px;box-shadow:inset 0 2px 6px rgba(0,0,0,.45);padding:4px 8px;font-family:Consolas,"Courier New",monospace;text-align:right}
.lcd .big{font-size:26px;font-weight:700;letter-spacing:.04em;line-height:1.1}
.lcd .unit{font-size:12px;margin-left:3px}
.lcd .lab{font-size:10px;text-align:left;opacity:.7}
.led{display:inline-block;width:9px;height:9px;border-radius:50%;background:#432;box-shadow:inset 0 1px 2px rgba(0,0,0,.6);vertical-align:middle}
.led.on{background:#ff4b2b;box-shadow:0 0 6px #ff4b2b}
.led.on.g{background:#3dff6a;box-shadow:0 0 6px #3dff6a}
.seg-btn{border:0;border-radius:4px;padding:4px 8px;font-size:11px;font-weight:700;background:linear-gradient(#fafafa,#cfd3da);box-shadow:0 2px 0 #7d838c;color:#222}
.seg-btn.on{background:linear-gradient(#8fdc9e,#4fb36a)}
.seg-btn:active{transform:translateY(2px);box-shadow:none}
.knob{display:inline-flex;flex-direction:column;align-items:center;font-size:10.5px;user-select:none;outline:none}
.knob svg{cursor:ns-resize;touch-action:none}
.knob:focus svg .ring{stroke:#0b9cff;stroke-width:2.5}
.knob .kv{font-family:Consolas,monospace;font-size:11px;margin-top:1px;white-space:nowrap}
.knob .kl{font-weight:600;opacity:.85;white-space:nowrap}
.schem{background:#fdfdfb;border-radius:8px;border:1px solid #cfc8b8;width:100%;height:auto;display:block}
.schem text{font-family:"Segoe UI",Arial,sans-serif}
.schem .w{stroke:#222;stroke-width:2;fill:none}
.schem .node{fill:#222}
.schem .val{font-size:13px;font-weight:700}
.schem .lbl{font-size:13px;fill:#333}
.schem .flow{stroke:#e07a10;stroke-width:3;fill:none;stroke-dasharray:4 10;stroke-linecap:round}
.scopewrap canvas{display:block;border-radius:6px;background:#06140c;box-shadow:inset 0 0 18px #000}
.meas{font-family:Consolas,monospace;font-size:12px;color:#cfe;line-height:1.5}
.toast{position:fixed;right:20px;bottom:20px;background:#0f1b2b;color:#fff;padding:10px 16px;border-radius:8px;box-shadow:0 6px 20px rgba(0,0,0,.3);font-size:14px;opacity:0;transform:translateY(10px);transition:.3s;z-index:99;pointer-events:none;max-width:420px}
.toast.show{opacity:1;transform:none}
.modal{position:fixed;inset:0;background:rgba(10,20,35,.55);display:none;place-items:center;z-index:50}
.modal.show{display:grid}
.modal .box{background:#fff;border-radius:12px;padding:18px 22px;max-width:560px;width:92%;box-shadow:0 20px 50px rgba(0,0,0,.4)}
.pill{display:inline-block;padding:2px 9px;border-radius:12px;background:#e3e9f2;font-size:12px;margin:2px}

/* ---- Rapor / yazdırma ---- */
#report{display:none}
@media print{
  body *{visibility:hidden}
  #report,#report *{visibility:visible}
  #report{display:block;position:absolute;left:0;top:0;width:100%;padding:0 10mm;font-size:11pt}
  #report img{max-width:100%}
  .no-print{display:none!important}
}

/* belirgin ana sayfa düğmesi (⌂ bağlantısı) */
.topbar>a:first-child{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.35);border-radius:8px;padding:6px 12px;font-size:15px!important;white-space:nowrap}
.topbar>a:first-child::after{content:" Ana sayfa";font-size:13px;font-weight:600}
.topbar>a:first-child:hover{background:rgba(255,255,255,.28)}

/* filigran */
html::after{content:'Prof. Dr. Ali AKDAĞLI';position:fixed;left:50%;top:50%;transform:translate(-50%,-50%) rotate(-28deg);font:700 clamp(40px,9vw,130px)/1 'Segoe UI',Arial,sans-serif;color:rgba(11,40,80,.07);white-space:nowrap;pointer-events:none;z-index:9999}