*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  font-family:Arial,sans-serif;
  background:#0b0b0b;
  color:white;
  line-height:1.8;

  min-width:900px;
  overflow-x:auto;
}

/* =========================
   NAVBAR
========================= */

nav{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:20px 8%;
  position:fixed;
  top:0;
  width:100%;
  z-index:1000;
  background:rgba(0,0,0,0.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid #222;
}

nav h2{
  font-size:28px;
}

nav ul{
  display:flex;
  gap:30px;
  list-style:none;
}

nav a{
  color:white;
  text-decoration:none;
  transition:0.3s ease;
}

nav a:hover{
  color:#999;
}

/* =========================
   PROJECT PAGE
========================= */

.project-page{
  max-width:1050px;
  margin:auto;
  padding:180px 8% 100px;
}

/* CATEGORY */

.tag{
  color:#8a8a8a;
  letter-spacing:2px;
  text-transform:uppercase;
  font-size:14px;
  margin-bottom:25px;
}

/* MAIN TITLE */

.project-main-title{
  font-size:52px;
  line-height:1.15;
  margin-bottom:30px;
}

/* INTRO */

.project-intro{
  font-size:20px;
  color:#cfcfcf;
  line-height:1.9;
  margin-bottom:70px;
  max-width:900px;
}

/* SECTIONS */

.project-section{
  margin-bottom:75px;
}

.project-section h2{
  font-size:34px;
  margin-bottom:28px;
  line-height:1.3;
}

.project-section p{
  color:#d2d2d2;
  margin-bottom:22px;
  line-height:1.9;
}

/* LIST */

.project-list{
  padding-left:24px;
}

.project-list li{
  margin-bottom:16px;
  color:#d5d5d5;
  line-height:1.8;
}

/* SKILLS */

.project-skills{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:20px;
}

.project-skills span{
  background:#161616;
  border:1px solid #333;
  padding:12px 18px;
  border-radius:30px;
  font-size:14px;
  color:#d7d7d7;
  transition:0.3s ease;
}

.project-skills span:hover{
  border-color:#666;
  transform:translateY(-2px);
}

/* BUTTONS */

.project-buttons{
  display:flex;
  gap:20px;
  flex-wrap:wrap;
  margin-top:50px;
}

.btn-primary,
.btn-secondary{
  padding:14px 28px;
  border-radius:12px;
  text-decoration:none;
  font-weight:bold;
  transition:0.3s ease;
}

.btn-primary{
  background:white;
  color:black;
}

.btn-secondary{
  border:1px solid #444;
  color:white;
}

.btn-primary:hover,
.btn-secondary:hover{
  transform:translateY(-2px);
}


/* =========================
   CERTIFICATIONS PAGE
========================= */

.page-header{

    padding:150px 8% 55px;
    text-align:center;

}

.page-header h1{

    font-size:48px;
    margin-bottom:16px;
    line-height:1.2;

}

.page-header p{

    max-width:720px;
    margin:auto;
    color:#bdbdbd;
    font-size:16px;
    line-height:1.7;

}

/* =========================
   CATEGORY SECTION
========================= */

.category-section{

    padding:0 8% 55px;

}

.category-title{

    font-size:28px;
    margin-bottom:26px;
    padding-left:14px;
    border-left:4px solid #ffffff;

}

/* =========================
   CERTIFICATE GRID
========================= */

.certificate-grid{

    display:grid;

    grid-template-columns:
    repeat(auto-fit,minmax(250px,1fr));

    gap:22px;

}

/* =========================
   CERTIFICATE CARD
========================= */

.certificate-card{

    background:#161616;

    border:1px solid #2c2c2c;

    border-radius:20px;

    overflow:hidden;

    transition:0.3s ease;

}

.certificate-card:hover{

    transform:translateY(-3px);

    border-color:#444;

}

.certificate-card img{

    width:100%;

    height:150px;

    object-fit:cover;

    cursor:pointer;

    transition:0.3s ease;

}

.certificate-card img:hover{

    transform:scale(1.02);

}

.certificate-content{

    padding:18px;

}

.certificate-content h3{

    font-size:18px;

    margin-bottom:10px;

    line-height:1.4;

}

.certificate-content p{

    color:#cfcfcf;

    font-size:13px;

    line-height:1.7;

    margin-bottom:14px;

}

.tag{

    display:inline-block;

    padding:7px 14px;

    border-radius:30px;

    background:#222;

    border:1px solid #333;

    color:#d7d7d7;

    font-size:11px;

    letter-spacing:1px;

}

/* =========================
   POPUP
========================= */

.popup{

    display:none;

    position:fixed;

    inset:0;

    background:rgba(0,0,0,0.94);

    z-index:99999;

    justify-content:center;

    align-items:center;

    padding:30px;

}

.popup.active{

    display:flex;

}

.popup img{

    max-width:95%;

    max-height:90vh;

    border-radius:14px;

    object-fit:contain;

}

.close-popup{

    position:absolute;

    top:20px;

    right:30px;

    color:white;

    font-size:42px;

    cursor:pointer;

}