@font-face{font-family:"Vazirmatn";src:url("/fonts/Vazirmatn.woff2") format("woff2");font-weight:100 900;font-display:swap}
:root{
  --bg:#060b0f;--surface:#0b1218;--surface2:#101a22;--line:#1a2832;--line2:#243743;
  --text:#e9f1f3;--muted:#8095a2;--accent:#10d98c;--accent-d:#07140e;--accent-soft:rgba(16,217,140,.12);
  --orange:#ff8a1f;--blue:#2f6bff;--purple:#8a4dff;--red:#ff5b6b;--yellow:#ffc233;
  --r:14px;--r-sm:9px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Vazirmatn",Tahoma,sans-serif;font-size:15px;line-height:1.8;min-height:100vh;display:flex;flex-direction:column;
  background-image:radial-gradient(900px 400px at 85% -5%,rgba(16,217,140,.08),transparent),radial-gradient(700px 400px at 0% 20%,rgba(47,107,255,.06),transparent)}
main{flex:1}
a{color:inherit;text-decoration:none}
img{max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.container{width:min(1200px,100% - 32px);margin-inline:auto}
.ic{width:1.15em;height:1.15em;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;vertical-align:-.2em;flex:none}
.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}
.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.between{justify-content:space-between}.grow{flex:1}
.mt{margin-top:18px}.mt2{margin-top:32px}.mb{margin-bottom:18px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(6,11,15,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.35rem}
.brand-mark{width:34px;height:34px;border-radius:10px;background:#0c1a14;border:1px solid #17402f;display:grid;place-items:center}
.brand small{font-weight:400;color:var(--muted);font-size:.72rem;display:block;line-height:1;margin-top:-2px}
.nav{display:flex;gap:4px;margin-inline-start:12px}
.nav a{padding:8px 14px;border-radius:9px;color:var(--muted);font-weight:500;position:relative}
.nav a:hover{color:var(--text)}
.nav a.active{color:var(--accent)}
.nav a.active::after{content:"";position:absolute;inset-inline:12px;bottom:-12px;height:2px;background:var(--accent)}
.hdr-end{margin-inline-start:auto;display:flex;align-items:center;gap:10px}
.menu-btn{display:none;background:none;border:1px solid var(--line2);border-radius:9px;padding:6px 9px;cursor:pointer}
.who{display:flex;align-items:center;gap:8px;font-size:.9rem;color:var(--muted)}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--surface2);border:1px solid var(--line2);display:grid;place-items:center;font-weight:700;color:var(--accent)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:9px 18px;border-radius:var(--r-sm);border:1px solid var(--line2);background:transparent;cursor:pointer;font-weight:600;transition:.15s;white-space:nowrap}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-d)}
.btn-primary:hover{background:#2be8a0;color:var(--accent-d)}
.btn-danger{border-color:#4a2128;color:var(--red)}.btn-danger:hover{border-color:var(--red);color:var(--red);background:rgba(255,91,107,.08)}
.btn-sm{padding:5px 12px;font-size:.85rem}
.btn-lg{padding:12px 26px;font-size:1rem}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}
.icon-btn{background:none;border:1px solid var(--line2);border-radius:8px;width:32px;height:32px;display:inline-grid;place-items:center;cursor:pointer;color:var(--muted)}
.icon-btn:hover{color:var(--accent);border-color:var(--accent)}.icon-btn.danger:hover{color:var(--red);border-color:var(--red)}

/* hero */
.hero{border-bottom:1px solid var(--line);padding:56px 0 48px}
.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:30px;align-items:center}
.pill{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line2);border-radius:99px;padding:5px 14px;font-size:.82rem;color:var(--muted)}
.hero h1{font-size:clamp(2rem,4.4vw,3.2rem);line-height:1.45;margin:18px 0 12px;font-weight:800}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p.lead{color:#b4c4cc;max-width:520px;margin:0 0 24px}
.hero-feats{display:flex;gap:28px;margin-top:34px;flex-wrap:wrap}
.hero-feats div{display:flex;gap:10px;align-items:center}
.hero-feats .ic{width:26px;height:26px;color:var(--accent)}
.hero-feats b{display:block;font-size:.9rem;line-height:1.4}.hero-feats span{font-size:.78rem;color:var(--muted)}
.orbit{position:relative;height:380px}
.core{position:absolute;inset:0;margin:auto;width:190px;height:190px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#16352a,#0a1411 70%);border:1px solid #1c4636;box-shadow:0 0 70px rgba(16,217,140,.18),inset 0 0 30px rgba(16,217,140,.08);display:grid;place-items:center;text-align:center}
.core b{font-size:3.2rem;font-weight:800;line-height:1}.core span{color:var(--accent);font-size:.8rem;display:block;margin-top:6px}
.tile{position:absolute;width:76px;height:76px;border-radius:20px;display:grid;place-items:center;color:#fff;box-shadow:0 18px 30px rgba(0,0,0,.45),inset 0 2px 0 rgba(255,255,255,.28);animation:bob 6s ease-in-out infinite}
.tile .ic{width:34px;height:34px}
.t1{background:linear-gradient(145deg,#ff9f3d,#e0600a);top:6%;inset-inline-start:36%}
.t2{background:linear-gradient(145deg,#3ccf6b,#168a3d);top:14%;inset-inline-end:6%;animation-delay:-1s}
.t3{background:linear-gradient(145deg,#a066ff,#6528d6);top:48%;inset-inline-end:0;animation-delay:-2s}
.t4{background:linear-gradient(145deg,#4a85ff,#1c46c9);bottom:4%;inset-inline-end:24%;animation-delay:-3s}
.t5{background:linear-gradient(145deg,#ffb23d,#e07a0a);bottom:8%;inset-inline-start:22%;animation-delay:-4s}
.t6{background:linear-gradient(145deg,#4a85ff,#1c46c9);top:30%;inset-inline-start:2%;animation-delay:-5s}
.script{position:absolute;inset-inline-start:0;bottom:0;color:#5d7380;transform:rotate(-7deg);line-height:1.5;font-size:1.05rem}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
@media (prefers-reduced-motion:reduce){.tile{animation:none}html{scroll-behavior:auto}}

/* layout sections */
.page{padding:34px 0 60px}
.home-grid{display:grid;grid-template-columns:320px 1fr;gap:24px;padding:34px 0 50px;align-items:start}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.card + .card{margin-top:18px}
.card h3{margin:0 0 12px;font-size:1rem;display:flex;align-items:center;gap:8px}
.card h3 .ic{color:var(--accent)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:10px;margin:0 0 16px}
.sec-head h2{margin:0;font-size:1.3rem}.sec-head p{margin:0;color:var(--muted);font-size:.85rem}
.sec-head a{color:var(--accent);font-size:.88rem}
.section{margin-bottom:34px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.ring{width:120px;height:120px;margin:6px auto 10px;position:relative}
.ring svg{transform:rotate(-90deg)}
.ring b{position:absolute;inset:0;display:grid;place-items:center;font-size:1.4rem}
.mini-list{list-style:none;margin:0;padding:0}
.mini-list li{padding:10px 0;border-top:1px solid var(--line)}.mini-list li:first-child{border-top:0}
.mini-list a:hover{color:var(--accent)}

/* course card */
.ccard{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.15s}
.ccard:hover{border-color:var(--accent);transform:translateY(-2px)}
.cover{height:118px;display:grid;place-items:center;color:#fff;background-size:cover;background-position:center;position:relative}
.cover .ic{width:42px;height:42px;opacity:.95}
.cv0{background:linear-gradient(135deg,#1d4ed8,#0b1f66)}.cv1{background:linear-gradient(135deg,#16a34a,#064e24)}.cv2{background:linear-gradient(135deg,#f97316,#7c2d05)}.cv3{background:linear-gradient(135deg,#8b5cf6,#32115f)}
.ccard .body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.ccard h4{margin:0;font-size:1.02rem;line-height:1.5}
.ccard p{margin:0;color:var(--muted);font-size:.85rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.9em}
.meta{display:flex;justify-content:space-between;gap:8px;color:var(--muted);font-size:.8rem;margin-top:4px}
.bar{height:5px;background:var(--line);border-radius:9px;overflow:hidden}.bar i{display:block;height:100%;background:var(--accent)}
.badge{display:inline-flex;align-items:center;gap:5px;padding:2px 10px;border-radius:99px;font-size:.75rem;border:1px solid var(--line2);color:var(--muted)}
.badge.green{color:var(--accent);border-color:#17503b;background:var(--accent-soft)}
.badge.orange{color:var(--orange);border-color:#5a3410;background:rgba(255,138,31,.1)}
.badge.red{color:var(--red);border-color:#5a2028;background:rgba(255,91,107,.08)}
.badge.blue{color:#7aa2ff;border-color:#1f3a7a;background:rgba(47,107,255,.1)}

/* learning path */
.path{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.step{text-align:center;position:relative;padding:6px}
.step .n{width:34px;height:34px;border-radius:50%;border:1px solid var(--accent);color:var(--accent);display:grid;place-items:center;margin:0 auto 8px;font-weight:700;background:var(--accent-soft)}
.step b{display:block;font-size:.92rem}.step span{color:var(--muted);font-size:.78rem}

/* forms */
label.f{display:block;margin-bottom:14px}
label.f>span{display:block;font-size:.85rem;color:var(--muted);margin-bottom:5px}
input[type=text],input[type=password],input[type=url],input[type=number],input[type=datetime-local],select,textarea{width:100%;background:var(--bg);border:1px solid var(--line2);border-radius:var(--r-sm);padding:9px 12px;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--accent)}
textarea{min-height:110px;resize:vertical}
input[dir=ltr],textarea[dir=ltr]{text-align:left}
.chk{display:inline-flex;align-items:center;gap:8px;cursor:pointer}
input[type=checkbox],input[type=radio]{accent-color:var(--accent);width:17px;height:17px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.err{color:var(--red);font-size:.88rem;margin:6px 0}
.hint{color:var(--muted);font-size:.8rem;margin-top:4px}

/* tabs & table */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:22px;overflow-x:auto}
.tabs a{padding:10px 18px;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap;font-weight:600}
.tabs a.active{color:var(--accent);border-color:var(--accent)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{padding:11px 14px;text-align:start;border-bottom:1px solid var(--line);vertical-align:middle}
th{color:var(--muted);font-weight:500;font-size:.8rem;background:var(--surface2)}
tr:last-child td{border-bottom:0}
.stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px;margin-bottom:24px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.stat b{font-size:1.8rem;display:block;line-height:1.3}.stat span{color:var(--muted);font-size:.85rem}
.stat.hl{border-color:#17503b;background:linear-gradient(180deg,rgba(16,217,140,.1),transparent)}
.empty{text-align:center;color:var(--muted);padding:34px 16px;border:1px dashed var(--line2);border-radius:var(--r)}
.empty .btn{margin-top:12px}
.linkbox{display:flex;gap:6px;align-items:center}
.linkbox input{direction:ltr;text-align:left;font-size:.8rem;padding:6px 10px;min-width:180px}

/* course / lesson */
.crumb{color:var(--muted);font-size:.88rem;margin-bottom:14px;display:inline-flex;gap:6px;align-items:center}.crumb:hover{color:var(--accent)}
.course-head{display:grid;grid-template-columns:1fr 280px;gap:24px;margin-bottom:24px;align-items:start}
.course-head h1{margin:6px 0 8px;font-size:1.8rem}
.course-head .cover{border-radius:var(--r);height:160px}
.lesson-list{list-style:none;margin:0;padding:0}
.lesson-list li a{display:flex;gap:12px;align-items:center;padding:12px 14px;border-bottom:1px solid var(--line)}
.lesson-list li:last-child a{border-bottom:0}
.lesson-list li a:hover,.lesson-list li a.cur{background:var(--surface2)}
.lesson-list li a.cur{box-shadow:inset -3px 0 0 var(--accent)}
.num{width:28px;height:28px;border-radius:50%;border:1px solid var(--line2);display:grid;place-items:center;font-size:.8rem;color:var(--muted);flex:none}
.num.done{background:var(--accent);border-color:var(--accent);color:var(--accent-d)}
.lesson-layout{display:grid;grid-template-columns:1fr 320px;gap:22px;align-items:start}
.lesson-layout .side{position:sticky;top:84px}
.player{position:relative;aspect-ratio:16/9;background:#000;border-radius:var(--r);overflow:hidden;margin-bottom:18px}
.player iframe,.player video{position:absolute;inset:0;width:100%;height:100%;border:0}
.prose{line-height:2;word-wrap:break-word}
.prose h2,.prose h3,.prose h4{margin:1.2em 0 .4em}
.prose pre{background:#050a0d;border:1px solid var(--line2);border-radius:var(--r-sm);padding:12px 14px;overflow-x:auto;direction:ltr;text-align:left;font-size:.85rem;line-height:1.7}
.prose code{background:#0a1319;border:1px solid var(--line);padding:1px 6px;border-radius:5px;direction:ltr;unicode-bidi:isolate;font-size:.88em}
.prose pre code{border:0;background:none;padding:0}
.prose a{color:var(--accent);text-decoration:underline;word-break:break-all}
.prose ul{padding-inline-start:22px}
.prose p{margin:.5em 0}
.lesson-nav{display:flex;justify-content:space-between;gap:10px;margin-top:22px;flex-wrap:wrap}

/* exams */
.qcard{border:1px solid var(--line);background:var(--surface);border-radius:var(--r);padding:18px;margin-bottom:16px}
.qcard .qh{display:flex;justify-content:space-between;gap:10px;margin-bottom:10px;align-items:flex-start}
.qtext{white-space:pre-wrap;font-weight:500}
.opt{display:flex;gap:10px;align-items:center;padding:10px 12px;border:1px solid var(--line2);border-radius:var(--r-sm);margin-top:8px;cursor:pointer}
.opt:hover{border-color:var(--accent)}
.opt.sel{border-color:var(--accent);background:var(--accent-soft)}
.opt.ok{border-color:var(--accent);background:var(--accent-soft)}
.opt.bad{border-color:var(--red);background:rgba(255,91,107,.08)}
.thumbs{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.thumb{position:relative;width:96px;height:96px;border-radius:10px;overflow:hidden;border:1px solid var(--line2);background:#000}
.thumb img{width:100%;height:100%;object-fit:cover}
.thumb button{position:absolute;top:3px;inset-inline-start:3px;background:rgba(0,0,0,.7);border:0;color:#fff;border-radius:6px;cursor:pointer;width:22px;height:22px;line-height:1}
.ans-box{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-sm);padding:12px;margin-top:8px;white-space:pre-wrap;word-break:break-word}
.score-in{width:90px!important;display:inline-block}
.sticky-bar{position:sticky;bottom:0;background:rgba(6,11,15,.92);backdrop-filter:blur(8px);border-top:1px solid var(--line);padding:12px 0;margin-top:20px;z-index:5}
.opt-edit{display:flex;gap:8px;align-items:center;margin-top:8px}.opt-edit input[type=text]{flex:1}

/* auth */
.auth-box{max-width:420px;margin:50px auto}
.auth-box h1{margin:0 0 6px;font-size:1.5rem}

/* overlays */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:100;display:grid;place-items:center;padding:16px;overflow-y:auto}
.modal{background:var(--surface);border:1px solid var(--line2);border-radius:var(--r);padding:22px;width:min(560px,100%);max-height:92vh;overflow-y:auto}
.modal h3{margin:0 0 14px}
#toasts{position:fixed;bottom:18px;inset-inline-start:18px;z-index:200;display:flex;flex-direction:column;gap:8px}
.toast{background:var(--surface2);border:1px solid var(--line2);border-inline-start:3px solid var(--accent);padding:10px 16px;border-radius:9px;box-shadow:0 8px 24px rgba(0,0,0,.4);max-width:340px}
.toast.error{border-inline-start-color:var(--red)}
.loading{padding:80px 0;text-align:center;color:var(--muted)}
.spin{display:inline-block;width:22px;height:22px;border:3px solid var(--line2);border-top-color:var(--accent);border-radius:50%;animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

.site-footer{border-top:1px solid var(--line);padding:18px 0;color:var(--muted);font-size:.85rem}
.site-footer .container{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:center}

@media (max-width:980px){
  .hero .container,.home-grid,.course-head,.lesson-layout{grid-template-columns:1fr}
  .orbit{height:300px}.lesson-layout .side{position:static}
  .home-grid aside{order:2}
}
@media (max-width:720px){
  .menu-btn{display:inline-grid}
  .nav{display:none;position:absolute;top:64px;inset-inline:0;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;padding:10px 16px;margin:0}
  .nav.open{display:flex}.nav a.active::after{display:none}
  .path{grid-template-columns:1fr 1fr}.form-grid{grid-template-columns:1fr}
  .who span{display:none}
}