@font-face{
    font-family:'Kalameh';
    src:url('../fonts/kalameh/Kalameh-Regular.ttf') format('truetype');
    font-weight:400;font-display:swap;
  }
  @font-face{
    font-family:'Kalameh';
    src:url('../fonts/kalameh/Kalameh-Bold.ttf') format('truetype');
    font-weight:700;font-display:swap;
  }
  @font-face{
    font-family:'Kalameh';
    src:url('../fonts/kalameh/Kalameh-Black.ttf') format('truetype');
    font-weight:900;font-display:swap;
  }
  
  :root{
    --bg:#f4f6fb;
    --bg-soft:#ffffff;
    --text:#0f172a;
    --text-soft:#64748b;
    --border:#e2e8f0;
    --accent:#2563eb;
    --accent-2:#7c3aed;
    --accent-soft:rgba(37,99,235,.08);
    --shadow:0 10px 40px rgba(15,23,42,.08);
    --shadow-sm:0 4px 14px rgba(15,23,42,.06);
  }
  [data-theme="dark"]{
    --bg:#0b1120;
    --bg-soft:#131c31;
    --text:#f1f5f9;
    --text-soft:#94a3b8;
    --border:#1e2a44;
    --accent:#3b82f6;
    --accent-2:#8b5cf6;
    --accent-soft:rgba(59,130,246,.12);
    --shadow:0 10px 40px rgba(0,0,0,.4);
    --shadow-sm:0 4px 14px rgba(0,0,0,.3);
  }
  
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    font-family:'Kalameh',Tahoma,sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.7;
    transition:background .35s ease,color .35s ease;
    overflow-x:hidden;
  }
  
  /* ===== background glow ===== */
  .bg-glow{
    position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;
  }
  .bg-glow::before,.bg-glow::after{
    content:'';position:absolute;width:500px;height:500px;border-radius:50%;
    filter:blur(120px);opacity:.35;
  }
  .bg-glow::before{background:var(--accent);top:-150px;right:-100px;}
  .bg-glow::after{background:var(--accent-2);bottom:-150px;left:-100px;}
  
  /* ===== header ===== */
  header{
    position:sticky;top:0;z-index:50;
    backdrop-filter:blur(14px);
    background:color-mix(in srgb,var(--bg) 80%,transparent);
    border-bottom:1px solid var(--border);
  }
  .nav-wrap{
    max-width:1200px;margin:0 auto;padding:14px 20px;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
  }
  .logo{
    display:flex;align-items:center;gap:10px;font-weight:900;font-size:20px;
  }
  .logo img{height:38px;width:auto;
    filter:var(--logo-filter);
  }
  [data-theme="dark"] .logo img{filter:invert(1) brightness(1.5);}
  
  .menu{display:flex;gap:10px;}
  .menu a{
    text-decoration:none;color:var(--text);font-weight:700;font-size:14px;
    padding:9px 18px;border-radius:12px;border:1px solid var(--border);
    background:var(--bg-soft);transition:.25s;white-space:nowrap;
  }
  .menu a:hover{
    border-color:var(--accent);color:var(--accent);
    transform:translateY(-2px);box-shadow:var(--shadow-sm);
  }
  
  .header-actions{display:flex;align-items:center;gap:10px}
  .theme-btn,.burger{
    width:42px;height:42px;border-radius:12px;border:1px solid var(--border);
    background:var(--bg-soft);cursor:pointer;display:grid;place-items:center;
    color:var(--text);transition:.25s;
  }
  .theme-btn:hover{border-color:var(--accent);color:var(--accent)}
  .burger{display:none}
  
  /* ===== hero ===== */
  .container{max-width:1200px;margin:0 auto;padding:40px 20px;position:relative;z-index:1}
  
  .hero-grid{
    display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-bottom:50px;
  }
  .card{
    background:var(--bg-soft);border:1px solid var(--border);
    border-radius:24px;padding:36px;box-shadow:var(--shadow);
    position:relative;overflow:hidden;transition:.35s;
  }
  .card:hover{transform:translateY(-6px)}
  .card::before{
    content:'';position:absolute;top:0;right:0;width:140px;height:140px;
    background:radial-gradient(circle,var(--accent-soft),transparent 70%);
    border-radius:50%;transform:translate(40px,-40px);
  }
  .card .icon{
    width:60px;height:60px;border-radius:16px;display:grid;place-items:center;
    margin-bottom:20px;font-size:28px;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    color:#fff;box-shadow:0 8px 24px var(--accent-soft);
  }
  .card h2{font-size:24px;font-weight:900;margin-bottom:12px}
  .card p{color:var(--text-soft);font-size:15px;margin-bottom:24px}
  .btn{
    display:inline-flex;justify-content:center;align-items:center;gap:8px;
    padding:13px 26px;border-radius:14px;border:none;cursor:pointer;
    font-family:inherit;font-weight:700;font-size:15px;color:#fff;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    transition:.25s;box-shadow:0 8px 20px var(--accent-soft);
  }
  .btn:hover{transform:translateY(-2px);box-shadow:0 12px 28px var(--accent-soft)}
  .btn-ghost{
    background:transparent;color:var(--accent);
    border:1.5px solid var(--accent);box-shadow:none;
  }
  
  /* ===== mentors ===== */
  .section-title{text-align:center;margin-bottom:36px}
  .section-title h3{font-size:28px;font-weight:900}
  .section-title span{color:var(--text-soft);font-size:15px}
  
  .mentors{
    display:flex;justify-content:center;align-items:center;
    gap:24px;flex-wrap:wrap;margin-bottom:60px;
  }
  .mentor{text-align:center;transition:.3s;cursor:pointer;outline:none}
  .mentor:hover{transform:translateY(-8px)}
  .mentor .avatar{
    width:130px;height:130px;border-radius:50%;object-fit:cover;
    border:4px solid var(--bg-soft);
    box-shadow:var(--shadow);background:var(--border);
    outline:2px solid var(--accent);outline-offset:3px;
  }
  .mentor:focus-visible .avatar{outline-color:var(--accent-2)}
  
  .mentor:nth-child(even) .avatar{width:150px;height:150px}
  .mentor .name{margin-top:14px;font-weight:700;font-size:15px}
  .mentor .role{color:var(--text-soft);font-size:13px}
  
  /* ===== catchy text ===== */
  .catchy{
    text-align:center;padding:50px 20px;margin-bottom:40px;
  }
  .catchy h2{
    font-size:clamp(28px,5vw,48px);font-weight:900;line-height:1.4;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .catchy p{color:var(--text-soft);font-size:17px;margin-top:14px}
  
  /* ===== modal ===== */
  .modal-overlay{
    position:fixed;inset:0;z-index:100;background:rgba(15,23,42,.6);
    backdrop-filter:blur(6px);display:none;
    align-items:center;justify-content:center;padding:20px;
    opacity:0;transition:opacity .3s;
  }
  .modal-overlay.open{display:flex;opacity:1}
  .modal{
    background:var(--bg-soft);border:1px solid var(--border);
    border-radius:24px;width:100%;max-width:520px;max-height:90vh;
    overflow-y:auto;box-shadow:var(--shadow);
    transform:translateY(20px) scale(.97);transition:.3s;
  }
  .modal-overlay.open .modal{transform:translateY(0) scale(1)}
  .modal-head{
    padding:24px 28px;border-bottom:1px solid var(--border);
    display:flex;align-items:center;justify-content:space-between;
    position:sticky;top:0;background:var(--bg-soft);z-index:2;
  }
  .modal-head h3{font-size:20px;font-weight:900}
  .close-btn{
    width:36px;height:36px;border-radius:10px;border:1px solid var(--border);
    background:transparent;cursor:pointer;color:var(--text);font-size:18px;
    display:grid;place-items:center;transition:.2s;
  }
  .close-btn:hover{background:var(--accent-soft);color:var(--accent)}
  .modal-body{padding:28px}
  
  /* category chips */
  .cats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:8px}
  .cat{
    padding:16px;border-radius:14px;border:1.5px solid var(--border);
    background:var(--bg);cursor:pointer;text-align:center;font-weight:700;
    font-size:14px;transition:.2s;
  }
  .cat:hover{border-color:var(--accent)}
  .cat.active{
    border-color:var(--accent);background:var(--accent-soft);color:var(--accent);
  }
  
  /* form */
  .field{margin-bottom:18px}
  .field label{display:block;font-size:14px;font-weight:700;margin-bottom:8px}
  .field input,.field textarea,.field select{
    width:100%;padding:13px 16px;border-radius:12px;
    border:1.5px solid var(--border);background:var(--bg);
    color:var(--text);font-family:inherit;font-size:15px;transition:.2s;
  }
  .field input:focus,.field textarea:focus,.field select:focus{
    outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);
  }
  .field textarea{resize:vertical;min-height:90px}
  
  .step{display:none}
  .step.active{display:block;animation:fade .3s}
  @keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
  
  .success{text-align:center;padding:20px 0}
  .success .check{
    width:80px;height:80px;border-radius:50%;margin:0 auto 20px;
    background:linear-gradient(135deg,#22c55e,#16a34a);color:#fff;
    display:grid;place-items:center;font-size:40px;
    animation:pop .4s;
  }
  @keyframes pop{0%{transform:scale(0)}70%{transform:scale(1.1)}100%{transform:scale(1)}}
  .success h3{font-size:22px;margin-bottom:10px}
  .success p{color:var(--text-soft)}
  
  /* ===== FOOTER ===== */
  .footer{
    background:var(--bg-soft);border-top:2px solid var(--border);
    padding:60px 20px 30px;margin-top:80px;
  }
  .footer-grid{
    display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
    gap:40px;margin-bottom:40px;
  }
  .footer-col h4{
    font-size:18px;font-weight:900;margin-bottom:20px;
    color:var(--accent);position:relative;padding-bottom:10px;
  }
  .footer-col h4::after{
    content:'';position:absolute;bottom:0;right:0;width:40px;height:3px;
    background:linear-gradient(90deg,var(--accent),var(--accent-2));
    border-radius:2px;
  }
  .footer-col p{
    color:var(--text-soft);font-size:14px;line-height:1.8;margin-bottom:16px;
  }
  .footer-logo{
    width:120px;height:auto;margin-top:12px;opacity:.9;
    transition:filter .3s;
  }
  [data-theme="dark"] .footer-logo{
    filter:brightness(0) invert(1);
  }
  .footer-links,.footer-contact{
    list-style:none;padding:0;display:flex;flex-direction:column;gap:12px;
  }
  .footer-links a,.footer-contact a,.footer-contact span{
    color:var(--text-soft);font-size:14px;transition:.3s;
    text-decoration:none;display:block;
  }
  .footer-links a:hover{color:var(--accent);padding-right:6px}
  .footer-contact li{display:flex;align-items:center;gap:10px}
  .footer-contact svg{color:var(--accent);flex-shrink:0}
  .footer-contact a:hover{color:var(--accent)}
  
  .social-links{display:flex;gap:12px;margin-top:16px}
  .social-icon{
    width:44px;height:44px;border-radius:50%;
    background:var(--bg);border:2px solid var(--border);
    display:flex;align-items:center;justify-content:center;
    color:var(--text-soft);transition:.3s;
  }
  .social-icon:hover{
    background:var(--accent);color:#fff;border-color:var(--accent);
    transform:translateY(-4px);box-shadow:0 8px 20px rgba(0,150,255,.3);
  }
  
  .footer-bottom{
    text-align:center;border-top:1px solid var(--border);
    padding-top:24px;display:flex;flex-direction:column;gap:8px;
  }
  .footer-bottom p{color:var(--text-soft);font-size:13px;margin:0}
  .footer-note{font-size:12px;opacity:.7}
  
  @media(max-width:768px){
    .footer{padding:40px 20px 20px}
    .footer-grid{gap:32px}
    .footer-col h4{font-size:16px}
    .footer-logo{width:100px}
  }
  
  
  /* ===== responsive ===== */
  @media(max-width:820px){
    .hero-grid{grid-template-columns:1fr}
    .menu{
      position:fixed;top:71px;right:0;left:0;flex-direction:column;
      background:var(--bg-soft);border-bottom:1px solid var(--border);
      padding:16px 20px;gap:8px;display:none;
    }
    .menu.open{display:flex}
    .menu a{text-align:center}
    .burger{display:grid}
    .mentor .avatar,.mentor:nth-child(even) .avatar{width:100px;height:100px}
  }
  
  
  
  .mentor-profile{text-align:center}
  .m-avatar{
    width:120px;height:120px;border-radius:50%;object-fit:cover;
    border:4px solid var(--bg-soft);box-shadow:var(--shadow);
    outline:2px solid var(--accent);outline-offset:3px;margin-bottom:16px;
  }
  .mentor-profile h2{font-size:24px;font-weight:900;margin-bottom:6px}
  .m-role{color:var(--accent);font-weight:700;font-size:15px;margin-bottom:16px}
  .m-skills{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:18px}
  .m-skills span{
    padding:6px 14px;border-radius:20px;font-size:13px;font-weight:700;
    background:var(--accent-soft);color:var(--accent);
  }
  .m-bio{color:var(--text-soft);font-size:15px;text-align:right;margin-bottom:24px;line-height:1.9}
  
  
  .login-btn{
    display:flex;align-items:center;gap:8px;
    height:42px;padding:0 18px;border-radius:12px;
    border:none;cursor:pointer;font-family:inherit;
    font-weight:700;font-size:14px;color:#fff;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    box-shadow:0 8px 20px var(--accent-soft);transition:.25s;
    white-space:nowrap;
  }
  .login-btn:hover{transform:translateY(-2px);box-shadow:0 12px 28px var(--accent-soft)}
  
  /* روی موبایل فقط آیکون بمونه تا جا بگیره */
  @media(max-width:480px){
    .login-btn span{display:none}
    .login-btn{padding:0 12px}
  }
  


  .read-only{background:var(--accent-soft);font-weight:700;color:var(--accent)}
.slots{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.slot{
  padding:10px 14px;border-radius:12px;border:1.5px solid var(--border);
  background:var(--bg);color:var(--text);font-weight:700;font-size:14px;
  cursor:pointer;transition:.2s;
}
.slot.free:hover{border-color:var(--accent);transform:translateY(-2px)}
.slot.selected{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.slot.taken{opacity:.45;cursor:not-allowed;text-decoration:line-through}
.slots-empty{color:var(--text-soft);font-size:14px;margin-top:6px}
.form-error{
  background:rgba(220,53,69,.1);border:1px solid rgba(220,53,69,.4);
  color:#dc3545;padding:12px 16px;border-radius:12px;font-size:14px;
  margin-bottom:16px;display:none;
}