:root{
    --bg:#0b1220;
    --panel:#0f172a;
    --text:#e5e7eb;
    --muted:#9ca3af;
    --line:#1f2a44;
    --accent:#38bdf8;
    --accent2:#a78bfa;
    --space-xl:80px;
    --space-lg:60px;
    --space-md:30px;
    --space-sm:15px;
  }
  *{box-sizing:border-box}
  body{
    margin:0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: radial-gradient(1200px 700px at 20% 10%, rgba(56,189,248,0.15), transparent 60%),
                radial-gradient(900px 600px at 80% 30%, rgba(167,139,250,0.12), transparent 60%),
                var(--bg);
    color:var(--text);
    line-height:1.6;
  }
  .container{width:88%; max-width:1050px; margin:0 auto;}
  nav{
    display:flex; justify-content:flex-end; gap:18px;
    padding:22px 0;
    position:sticky; top:0;
    background: rgba(11,18,32,0.75);
    backdrop-filter: blur(10px);
    border-bottom:1px solid rgba(31,42,68,0.6);
    z-index:10;
  }
  nav a{
    color:var(--muted); text-decoration:none; font-size:14px;
    padding:8px 10px; border-radius:10px;
  }
  nav a:hover{color:var(--accent); background:rgba(56,189,248,0.08);}
  .hero{padding:70px 0 30px;}
  .kicker{
    display:inline-flex; gap:10px; align-items:center;
    font-size:13px; color:var(--muted);
    border:1px solid rgba(31,42,68,0.8);
    padding:8px 12px; border-radius:999px;
    background: rgba(15,23,42,0.65);
  }
  .dot{width:8px;height:8px;border-radius:50%;background:var(--accent); box-shadow:0 0 18px rgba(56,189,248,0.6);}
  h1{font-size:46px; margin:18px 0 10px; letter-spacing:-0.5px;}
  .subtitle{font-size:18px; color:var(--muted); max-width:780px;}
  .cta{display:flex; gap:12px; flex-wrap:wrap; margin-top:22px; margin-bottom:10px;}
  .btn{
    display:inline-flex; align-items:center; gap:10px;
    padding:10px 14px; border-radius:14px;
    text-decoration:none; font-size:14px;
    border:1px solid rgba(31,42,68,0.9);
    background: rgba(15,23,42,0.75);
    color:var(--text);
  }
  .btn:hover{border-color:rgba(56,189,248,0.6); box-shadow:0 0 0 3px rgba(56,189,248,0.08);}
  .btn.primary{
    background: linear-gradient(135deg, rgba(56,189,248,0.22), rgba(167,139,250,0.18));
    border-color: rgba(56,189,248,0.35);
  }
    

/* Make ONLY the main hero wrapper relative */
/* اسم کلاس رو اگر فرق داشت عوض کن */
.hero, .main-hero, .landing {
  position: relative;
  min-height: 520px;
}

/* Avatar placement */
.profile-pic{
  position: absolute;

  right: 1%;      /* قبلاً 10% بود → نزدیک‌تر به لبه */
  top: 90px;     /* اگر لازم شد 140–170 تنظیم کن */

  width: 230px;   /* بزرگ‌تر */
  height: 230px;

  border-radius: 50%;
  object-fit: cover;

  border: 2px solid rgba(255,255,255,0.12);
  box-shadow: 
      0 0 50px rgba(0,140,255,0.15),
      0 25px 50px rgba(0,0,0,0.5);

  z-index: 2;
}

/* Hide on small screens */
@media (max-width: 1000px){
  .profile-pic{
    display: none;
  }
}
box-shadow: 0 0 40px rgba(0,140,255,0.15),
            0 20px 40px rgba(0,0,0,0.45);
  

  .grid{display:grid; grid-template-columns: 1fr; gap:18px; margin-top: 28px;}
}
  @media(min-width:900px){
    .grid{grid-template-columns: 1.2fr 0.8fr;}
  }

  .card{
    border:1px solid rgba(31,42,68,0.9);
    background: rgba(15,23,42,0.65);
    border-radius:20px;
    padding:18px 18px;
  }
  .card h3{margin:0 0 10px; font-size:16px; color:var(--accent);}
  .section{padding:34px 0; border-top:1px solid rgba(31,42,68,0.7);}
  .section h2{margin:0 0 14px; color:var(--accent); font-size:18px;}
  .muted{color:var(--muted)}
  .tags{display:flex; flex-wrap:wrap; gap:8px; margin-top:10px;}
  .tag{
    font-size:12px; color:var(--muted);
    padding:6px 10px; border-radius:999px;
    border:1px solid rgba(31,42,68,0.9);
    background: rgba(11,18,32,0.35);
    margin-bottom: 23px;
  }
  .project{
    padding:16px; border-radius:18px;
    border:1px solid rgba(31,42,68,0.9);
    background: rgba(11,18,32,0.35);
    margin-top:12px;
  }
  .project-title{display:flex; justify-content:space-between; gap:10px; flex-wrap:wrap;}
  .project-title strong{font-size:9px;}
  .links a{color:var(--accent); text-decoration:none; font-size:13px; margin-right:12px;}
  .links a:hover{text-decoration:underline;}
  ul{margin:10px 0 0 18px; color:var(--muted)}
  footer{padding:32px 0; text-align:center; color:var(--muted); font-size:13px;}

.books-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.book-item {
    display: flex;
    gap: 30px;
    align-items: center;
    background-color: #1a1a1a;
    padding: 20px;
    border-radius: 12px;
}

.book-item img {
    width: 160px;
    border-radius: 10px;
}

.book-content {
    flex: 1;
}

.book-content h3 {
    margin: 0 0 10px 0;
    color: #ffffff;
}

.book-content p {
    color: #cccccc;
    line-height: 1.6;
}

.amazon-btn {
    display: inline-block;
    margin-top: 15px;
    padding: 8px 16px;
    background-color: #00bfff;
    color: #000;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
    transition: 0.3s;
}

.amazon-btn:hover {
    background-color: #009acd;
}

.research-questions {
    background-color: #141414;
    padding: 25px;
    border-radius: 12px;
    margin-top: 20px;
}

.research-questions ul {
    padding-left: 20px;
}

.research-questions li {
    margin-bottom: 12px;
    color: #cccccc;
    line-height: 1.6;
}

.pub-item {
    background-color: #141414;
    padding: 18px;
    border-radius: 10px;
    margin-bottom: 15px;
}

.pub-title {
    color: #ffffff;
    font-weight: bold;
}

.pub-meta {
    color: #aaaaaa;
    font-size: 14px;
    margin: 5px 0;
}

.pub-links a {
    color: #00bfff;
    text-decoration: none;
    margin-right: 15px;
    font-weight: bold;
}

.pub-links a:hover {
    text-decoration: underline;
}

.results-box {
    background-color: #101820;
    padding: 15px;
    border-radius: 10px;
    margin-top: 15px;
    font-size: 14px;
    color: #cccccc;
}

.results-box strong {
    color: #ffffff;
}

.results-box img {
    width: 100%;
    max-width: 500px;
    margin-top: 15px;
    border-radius: 8px;
}
/* Projects pages: keep content away from edges */
.page {
  max-width: 1000px;
  margin: 90px auto;
  padding: 0 24px 120px;  /* ← این عدد آخر فاصله پایین است */
  box-sizing: border-box;
}

/* Mobile: کمی بیشتر فضا بده */
@media (max-width: 600px) {
  .page {
  padding-left: 18px !important;
  padding-right: 18px !important;
}
}
.back-btn {
  color: #8bd3ff;
  text-decoration: none;
  font-size: 14px;
  opacity: 0.8;
  transition: 0.2s ease;
  padding-left: 10px;
}

.back-btn:hover {
  opacity: 1;
  text-decoration: underline;
}
.training-curve {
  padding-left: 9px;
  margin-top:10px;
}
/* =========================
   Projects Section (Cards)
   ========================= */