:root{--bg:#f6f8fb;--card:#fff;--ink:#17212b;--muted:#637182;--accent:#1b5e87;--accent2:#0e7490;--border:#dbe3ea;--success:#e7f6ee}
*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:"B Nazanin","BNazanin",Tahoma,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.9}header{height:68px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 6%;position:sticky;top:0;z-index:5}.brand{font-weight:700;color:var(--accent);font-size:20px}nav a{color:var(--accent);text-decoration:none;margin-right:20px}main{max-width:1120px;margin:35px auto;padding:0 22px}.hero{background:linear-gradient(135deg,#eef6fb,#f9fbfd);border:1px solid var(--border);border-radius:18px;padding:28px;margin-bottom:22px}.hero h1{margin:0 0 8px;font-size:32px}.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:25px;margin-bottom:22px;box-shadow:0 6px 24px rgba(31,54,73,.05)}.card.narrow{max-width:520px;margin:70px auto}.center{text-align:center}.success{background:var(--success)}.notice{background:#fff7d6;border:1px solid #ead894;color:#5e541e;border-radius:12px;padding:13px 16px;margin-bottom:18px}.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}label{display:block;margin:12px 0;font-weight:600}input[type=text],input[type=password],input[type=number],select{width:100%;padding:11px 12px;margin-top:5px;border:1px solid var(--border);border-radius:10px;background:#fff;font:inherit}fieldset{border:1px solid var(--border);border-radius:12px;margin:17px 0;padding:14px}legend{padding:0 7px;font-weight:700}.radios{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}.radio{font-weight:500;background:#f8fafc;padding:8px;border-radius:8px}.check{display:flex;gap:9px;align-items:flex-start;font-weight:500}.primary,.secondary,.button{border:0;border-radius:10px;padding:11px 18px;font:inherit;text-decoration:none;display:inline-block;cursor:pointer}.primary{background:var(--accent);color:#fff}.secondary{background:#e8eef4;color:#183245}.button{margin:5px}.primary:disabled,.secondary:disabled{opacity:.45;cursor:not-allowed}.actions{display:flex;gap:10px;flex-wrap:wrap}.stats{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin-bottom:22px}.stats>div{background:#fff;border:1px solid var(--border);border-radius:14px;text-align:center;padding:16px}.stats b{display:block;font-size:27px;color:var(--accent)}.stats span{color:var(--muted)}table{width:100%;border-collapse:collapse;margin-top:12px}th,td{border-bottom:1px solid var(--border);padding:10px;text-align:right}th{background:#f6f8fa}.qgroup{margin-bottom:30px}.question{border:1px solid var(--border);border-radius:12px;padding:16px;margin:12px 0}.qtext{margin-bottom:10px}.likert-row{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.likert{margin:0;border:1px solid var(--border);border-radius:10px;text-align:center;padding:8px;background:#fafcfd}.likert input{display:block;margin:0 auto 4px}.fileicon{display:inline-flex;width:68px;height:68px;border-radius:16px;background:#e9f4fa;color:var(--accent);align-items:center;justify-content:center;font-weight:800;margin-bottom:8px}.codebox{background:#0f2433;color:#fff;padding:15px;border-radius:12px;direction:ltr;word-break:break-all}.muted{color:var(--muted)}footer{text-align:center;color:var(--muted);padding:30px 15px}@media(max-width:800px){.grid2,.stats{grid-template-columns:1fr 1fr}.radios,.likert-row{grid-template-columns:1fr 1fr}}@media(max-width:520px){.grid2,.stats,.radios,.likert-row{grid-template-columns:1fr}header{padding:0 4%}.brand{font-size:16px}main{padding:0 12px}}
.definition-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:16px 0}.definition-grid>div{border:1px solid var(--border);border-radius:12px;padding:12px;background:#f8fafc}.definition-grid b{display:block;color:var(--accent);margin-bottom:5px}.definition-grid span{display:block;color:var(--muted);font-size:15px}@media(max-width:800px){.definition-grid{grid-template-columns:1fr 1fr}}@media(max-width:520px){.definition-grid{grid-template-columns:1fr}}
.slide-viewer{padding:18px}.slide-toolbar{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px;flex-wrap:wrap}.slide-stage{background:#eef1f4;border:1px solid var(--border);border-radius:14px;padding:10px;display:flex;justify-content:center;align-items:center;min-height:420px;overflow:auto}.slide-stage img{display:block;max-width:100%;height:auto;max-height:72vh;object-fit:contain;border-radius:8px;box-shadow:0 4px 18px rgba(31,54,73,.12);background:#fff}.slide-nav{display:flex;justify-content:space-between;gap:10px;margin-top:14px}.finish-area{margin-top:18px;padding:16px;border-top:1px solid var(--border);text-align:center;background:#f8fafc;border-radius:12px}.hidden{display:none!important}.likert small{display:block;font-size:13px;color:var(--muted);font-weight:500;line-height:1.4}@media(max-width:600px){.slide-stage{min-height:260px}.slide-stage img{max-height:58vh}.slide-nav{flex-direction:column}.slide-nav button{width:100%}}

.code-card{text-align:center}.study-code{display:inline-block;margin:12px auto 18px;padding:10px 28px;border:2px solid var(--accent);border-radius:14px;background:#f7fbfe;color:var(--accent);font:700 34px/1.4 Tahoma,Arial,sans-serif;direction:ltr;letter-spacing:1px}.code-card p{max-width:760px;margin-left:auto;margin-right:auto}