:root { --ink:#17233d; --muted:#68738b; --line:#e6eaf2; --surface:rgba(255,255,255,.86); --purple:#6d55e8; --purple-dark:#5140bd; --teal:#0b9b9b; --shadow:0 18px 55px rgba(48,42,103,.09); }
* { box-sizing:border-box; }
body { min-height:100vh; margin:0; color:var(--ink); background:#f7f8fc; font-family:"Vazirmatn",Tahoma,sans-serif; }
button,textarea { font:inherit; } button { cursor:pointer; }
.page-glow { position:fixed; z-index:-1; width:380px; height:380px; border-radius:50%; filter:blur(4px); opacity:.55; pointer-events:none; }
.page-glow-one { top:-180px; right:-90px; background:#ded9ff; } .page-glow-two { bottom:-220px; left:-80px; background:#ccefed; }
.container { width:min(1050px,calc(100% - 32px)); margin:0 auto; padding:56px 0 80px; }
.hero { margin-bottom:34px; text-align:center; } .eyebrow { color:var(--purple); font-size:.82rem; font-weight:800; letter-spacing:.06em; }
.hero h1 { margin:12px 0 10px; font-size:clamp(1.75rem,4vw,2.65rem); font-weight:800; letter-spacing:-.04em; } .hero p { max-width:550px; margin:auto; color:var(--muted); font-size:1rem; }
.questions { display:grid; gap:14px; } .question-card { overflow:hidden; border:1px solid var(--line); border-radius:18px; background:var(--surface); box-shadow:0 5px 22px rgba(43,47,82,.035); backdrop-filter:blur(10px); transition:border-color .25s,box-shadow .25s; }
.question-card.is-open { border-color:#cfc8ff; box-shadow:var(--shadow); } .question-header { display:flex; align-items:center; gap:14px; padding:10px 14px 10px 18px; }
.question-trigger { display:flex; flex:1; align-items:center; gap:13px; padding:7px 0; border:0; color:var(--ink); background:transparent; text-align:right; }
.question-number { display:grid; width:39px; height:39px; flex:0 0 39px; place-items:center; border-radius:12px; color:#fff; background:linear-gradient(135deg,var(--purple),#907cf5); font-weight:800; }
.question-heading { font-weight:700; } .chevron { margin-right:auto; color:#98a1b5; font-size:1.4rem; line-height:1; transition:transform .25s; } .is-open .chevron { transform:rotate(180deg); color:var(--purple); }
.ai-toggle { display:flex; align-items:center; gap:7px; padding:10px 14px; border:1px solid #d8d1ff; border-radius:11px; color:var(--purple-dark); background:#f4f1ff; font-size:.82rem; font-weight:700; white-space:nowrap; transition:.2s; }
.ai-toggle:hover { color:#fff; background:var(--purple); border-color:var(--purple); } .sparkle { font-size:1.1rem; }
.question-panel { padding:4px 24px 27px; animation:reveal .28s ease both; } @keyframes reveal { from { opacity:0; transform:translateY(-5px); } to { opacity:1; transform:translateY(0); } }
.statement-box,.solution-box,.ai-box { border-radius:14px; padding:18px; } .statement-box { border:1px solid #e4e0ff; background:#faf9ff; }
.label { display:block; margin-bottom:9px; color:var(--purple-dark); font-size:.78rem; font-weight:800; } .statement-box p,.solution-box p { margin:0; line-height:2; }
.ai-box { margin-top:14px; border:1px solid #c9ece8; background:#f1fbfa; } .ai-box .label { color:#087f80; }
.ai-answer { margin-top:14px; padding:16px 18px; border:1px solid #c9ece8; border-right:4px solid var(--teal); border-radius:12px; background:#fff; }
.ai-answer .label { color:#087f80; }
.ai-answer-text { margin:0; color:var(--ink); line-height:2; white-space:pre-wrap; overflow-wrap:anywhere; }
.statement-box p,.solution-box p,.ai-answer-text { overflow-x:auto; }
.MathJax { direction:ltr; }
.submit-button:disabled { cursor:wait; opacity:.65; transform:none; }
textarea { width:100%; resize:vertical; min-height:80px; padding:12px 14px; border:1px solid #cfe0df; border-radius:10px; outline:0; color:var(--ink); background:#fff; line-height:1.8; transition:border-color .2s,box-shadow .2s; }
textarea:focus { border-color:var(--teal); box-shadow:0 0 0 3px rgba(11,155,155,.12); } .submit-button { display:flex; align-items:center; justify-content:center; gap:12px; margin-top:11px; padding:10px 17px; border:0; border-radius:10px; color:#fff; background:var(--teal); font-weight:700; transition:transform .2s,background .2s; }
.submit-button:hover { background:#087d7e; transform:translateY(-1px); } .form-status { min-height:1.5em; margin:9px 0 0; font-size:.8rem; } .is-sending { color:var(--muted); } .is-success { color:#078276; } .is-error { color:#c24b5a; }
.solutions-grid { display:grid; grid-template-columns:1fr; gap:14px; margin-top:14px; } .solution-box { border:1px solid var(--line); background:#fff; } .complete-solution { border-color:#d8e7fb; background:#f8fbff; } .complete-solution .label { color:#2870b8; }
@media (max-width:640px) { .container { width:min(100% - 20px,1050px); padding-top:34px; } .question-header { align-items:stretch; flex-direction:column; gap:5px; padding:10px 12px; } .ai-toggle { align-self:flex-start; margin-right:52px; } .question-panel { padding:3px 14px 18px; } .solutions-grid { grid-template-columns:1fr; } }