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

:root {
  --bg: #0a0d12;
  --surface: #111620;
  --border: #1e2635;
  --accent: #00e5ff;
  --accent2: #7c3aed;
  --text: #e2e8f0;
  --muted: #64748b;
  --mono: 'Space Mono', monospace;
  --display: 'Syne', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  line-height: 1.7;
  overflow-x: hidden;
}

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 5vw;
  background: rgba(10,10,10,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--white);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.nav-back {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-back:hover { color: var(--accent); }

/* PAGE HEADER */
.page-header {
  padding: 10rem 10vw 4rem;
  max-width: 1200px;
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4rem;
}

.page-label {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.page-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 1rem;
}


/* CONTENT AREA */
.page-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 10vw 6rem;
}
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 10vw;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  flex-wrap: wrap;
  gap: 1rem;
}
img{
  width: 300px;
  height: 315.6px;
}


    .cert-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: 1.5rem;
    }
    .cert-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 4px;
      overflow: hidden;
      transition: border-color 0.25s, transform 0.25s;
    }
    .cert-card:hover {
      border-color: var(--accent);
      transform: translateY(-3px);
    }
    .cert-thumb {
      width: 100%;
      aspect-ratio: 4/3;
      object-fit: cover;
      object-position: top;
      display: block;
      background: var(--surface2);
      border-bottom: 1px solid var(--border);
    }
    .cert-thumb-placeholder {
      width: 100%;
      aspect-ratio: 4/3;
      background: var(--surface2);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .cert-thumb-placeholder span {
      font-size: 2rem;
      opacity: 0.4;
    }
    .cert-body { padding: 1.4rem; }
    .cert-issuer {
      font-size: 0.6rem;
      letter-spacing: 0.16em;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 0.4rem;
    }
    .cert-title {
      font-family: 'Syne', sans-serif;
      font-size: 1rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 0.4rem;
      line-height: 1.3;
    }
    .cert-meta {
      font-size: 0.68rem;
      color: var(--muted);
      margin-bottom: 1rem;
    }
    .cert-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-bottom: 1rem; }
    .tag {
      background: var(--surface2);
      font-size: 0.58rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--muted);
      padding: 0.25rem 0.6rem;
      border-radius: 2px;
    }
    .cert-link {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      font-size: 0.65rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--accent);
      text-decoration: none;
      transition: opacity 0.2s;
    }
    .cert-link:hover { opacity: 0.75; }

    /* CATEGORY HEADING */
    .cat-label {
      font-size: 0.65rem;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: var(--muted);
      margin: 3rem 0 1.2rem;
      padding-bottom: 0.6rem;
      border-bottom: 1px solid var(--border);
    }
    .cat-label:first-child { margin-top: 0; }
        @media (max-width: 768px) {
      .project-detail { grid-template-columns: 1fr; gap: 1.5rem; }
    }