:root{
  --bg:#FFFFFF;--surface:#F8FAFC;--surface-2:#F1F5F9;--text:#0F172A;--muted:#64748B;
  --accent:#2563EB;--accent-strong:#1D4ED8;--accent-soft:rgba(37,99,235,.09);
  --border:#E5EAF2;--ok:#16A34A;--err:#DC2626;
  --shadow:0 12px 34px rgba(15,23,42,.07);--shadow-lg:0 22px 50px rgba(15,23,42,.10);
  --r:18px;--r-sm:12px;
  --font-display:'Space Grotesk','Vazirmatn',sans-serif;
  --font-body:'Inter','Vazirmatn',sans-serif;
  --ease:cubic-bezier(.2,.7,.2,1);
}
html[data-theme="dark"]{
  --bg:#0B1220;--surface:#111827;--surface-2:#1F2937;--text:#F9FAFB;--muted:#94A3B8;
  --accent:#3B82F6;--accent-strong:#60A5FA;--accent-soft:rgba(59,130,246,.13);
  --border:rgba(148,163,184,.15);--shadow:0 12px 34px rgba(0,0,0,.35);--shadow-lg:0 22px 50px rgba(0,0,0,.45);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased;transition:background .35s,color .35s}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:none}
ul{list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.container{max-width:1200px;margin-inline:auto;padding-inline:clamp(20px,4vw,32px)}

/* ---------- Topbar ---------- */
.topbar{position:sticky;top:0;z-index:50;height:66px;display:flex;align-items:center;background:var(--bg);border-bottom:1px solid var(--border)}
.topbar .container{display:flex;align-items:center;gap:12px;width:100%}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);font-weight:700;margin-inline-end:auto}
.logo-mark{width:38px;height:38px;border-radius:11px;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:700}
.icon-btn{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;border:1px solid var(--border);background:var(--bg);transition:all .3s var(--ease)}
.icon-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.icon-btn svg{width:19px;height:19px}
.lang-btn{display:inline-flex;align-items:center;gap:7px;height:42px;padding-inline:14px;border-radius:12px;border:1px solid var(--border);font-weight:600;font-size:.85rem;background:var(--bg);transition:all .3s}
.lang-btn:hover{border-color:var(--accent);color:var(--accent)}
.lang-btn svg{width:16px;height:16px}
.theme-btn .sun{display:none}
html[data-theme="dark"] .theme-btn .sun{display:block}
html[data-theme="dark"] .theme-btn .moon{display:none}

/* ---------- Buttons / Fields ---------- */
.btn{display:inline-flex;margin-top:30px;align-items:center;justify-content:center;gap:9px;padding:13px 26px;border-radius:var(--r-sm);font-weight:600;font-size:.95rem;border:1px solid transparent;transition:all .3s var(--ease)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 22px var(--accent-soft)}
.btn-primary:hover{background:var(--accent-strong);transform:translateY(-2px)}
.btn-ghost{border-color:var(--border);background:var(--bg)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.btn-block{width:100%}
.field{margin-bottom:18px}
.field label{display:block;font-size:.87rem;font-weight:600;margin-bottom:8px}
.field input{width:100%;padding:13px 16px;border-radius:var(--r-sm);border:1.5px solid var(--border);background:var(--bg);transition:border-color .3s,box-shadow .3s}
.field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.field .f-err{display:none;color:var(--err);font-size:.78rem;margin-top:6px}
.field.invalid input{border-color:var(--err)}
.field.invalid .f-err{display:block}
.flash{padding:13px 16px;border-radius:var(--r-sm);font-size:.88rem;font-weight:500;margin-bottom:18px;border:1px solid}
.flash.ok{background:rgba(22,163,74,.1);color:var(--ok);border-color:rgba(22,163,74,.25)}
.flash.error{background:rgba(220,38,38,.08);color:var(--err);border-color:rgba(220,38,38,.25)}

/* ---------- Auth pages ---------- */
.auth-grid{display:grid;grid-template-columns:1fr 1.05fr;min-height:100svh}
.auth-brand{background:var(--surface);border-inline-end:1px solid var(--border);padding:clamp(32px,5vw,64px);display:flex;flex-direction:column;justify-content:center;gap:22px;position:relative;overflow:hidden}
.auth-brand::before{content:"";position:absolute;inset:0;background-image:radial-gradient(var(--border) 1px,transparent 1px);background-size:24px 24px;opacity:.6}
.auth-brand>*{position:relative}
.auth-brand h1{font-family:var(--font-display);font-size:clamp(1.6rem,3vw,2.2rem);line-height:1.4}
.auth-brand p{color:var(--muted);max-width:40ch}
.auth-brand ul{display:grid;gap:12px;margin-top:8px}
.auth-brand li{display:flex;gap:10px;align-items:center;font-size:.92rem;font-weight:500}
.auth-brand li svg{width:18px;height:18px;color:var(--accent);flex-shrink:0}
.auth-side{display:grid;place-items:center;padding:clamp(24px,4vw,48px);position:relative}
.auth-top{position:absolute;top:22px;inset-inline-end:26px;display:flex;gap:10px}
.auth-card{width:min(430px,100%)}
.auth-card h2{font-family:var(--font-display);font-size:1.6rem;margin-bottom:6px}
.auth-card .sub{color:var(--muted);font-size:.92rem;margin-bottom:26px}
.auth-alt{text-align:center;margin-top:22px;font-size:.9rem;color:var(--muted)}
.auth-alt a{color:var(--accent);font-weight:600}
.auth-alt a:hover{text-decoration:underline}

/* ---------- Panel ---------- */
.panel-wrap{display:grid;grid-template-columns:272px 1fr;gap:26px;padding-block:32px;align-items:start}
.side-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:26px 20px;position:sticky;top:86px}
.avatar{width:74px;height:74px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-family:var(--font-display);font-size:1.9rem;font-weight:700;margin:0 auto 14px;box-shadow:0 10px 26px var(--accent-soft)}
.side-name{text-align:center;font-weight:700;font-size:1.05rem}
.side-email{text-align:center;color:var(--muted);font-size:.8rem;margin-bottom:20px;word-break:break-all}
.side-nav{display:grid;gap:5px;border-top:1px solid var(--border);padding-top:18px}
.side-nav a{display:flex;align-items:center;gap:11px;padding:11px 14px;border-radius:11px;font-size:.92rem;font-weight:500;color:var(--muted);transition:all .25s var(--ease)}
.side-nav a svg{width:18px;height:18px}
.side-nav a:hover{background:var(--accent-soft);color:var(--accent)}
.side-nav a.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.side-nav a.danger{color:var(--err)}
.side-nav a.danger:hover{background:rgba(220,38,38,.08)}

.content-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:clamp(24px,4vw,34px)}
.content-card h2{font-family:var(--font-display);font-size:1.35rem;margin-bottom:6px}
.content-card .sub{color:var(--muted);font-size:.92rem;margin-bottom:26px}
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:28px}
.stat-box{background:var(--bg);border:1px solid var(--border);border-radius:var(--r-sm);padding:20px;text-align:center;transition:all .3s var(--ease)}
.stat-box:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.stat-box strong{font-family:var(--font-display);font-size:1.7rem;color:var(--accent);display:block}
.stat-box span{font-size:.8rem;color:var(--muted)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.divider{height:1px;background:var(--border);margin:30px 0}

.my-course{display:flex;gap:16px;background:var(--bg);border:1px solid var(--border);border-radius:var(--r-sm);padding:14px;transition:all .3s var(--ease);align-items:center}
.my-course:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--accent) 30%,var(--border))}
.my-course img{width:120px;height:76px;object-fit:cover;border-radius:10px;flex-shrink:0}
.my-course h3{font-size:.95rem;font-family:var(--font-display)}
.my-course .meta{display:flex;gap:14px;color:var(--muted);font-size:.76rem;margin-top:5px;flex-wrap:wrap}
.my-course .go{margin-inline-start:auto;flex-shrink:0}
.courses-list{display:grid;gap:14px}

.empty{border:1.5px dashed var(--border);border-radius:var(--r);padding:52px 24px;text-align:center;color:var(--muted)}
.empty svg{width:44px;height:44px;margin:0 auto 14px;color:var(--accent);opacity:.7}
.empty .btn{margin-top:18px}

.mini-footer{border-top:1px solid var(--border);margin-top:48px;padding:22px 0;color:var(--muted);font-size:.82rem;text-align:center}

@media (max-width:960px){
  .auth-grid{grid-template-columns:1fr}
  .auth-brand{display:none}
  .panel-wrap{grid-template-columns:1fr}
  .side-card{position:static}
  .grid-2{grid-template-columns:1fr}
}
@media (max-width:600px){
  .stats-row{grid-template-columns:1fr}
  .my-course{flex-wrap:wrap}
  .my-course .go{margin-inline-start:0;width:100%}
  .lang-btn .lang-txt{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}