:root {
  --bg:        #f4f6fa;
  --bg2:       #edf0f7;
  --surface:   #ffffff;
  --surface2:  #f0f2f8;
  --border:    rgba(30,40,80,0.1);
  --border2:   rgba(30,40,80,0.18);
  --text:      #111827;
  --text2:     #374151;
  --muted:     #6b7280;
  --accent:    #1d4ed8;
  --accent2:   #0891b2;
  --accent-lt: rgba(29,78,216,0.08);
  --accent-lt2: rgba(8,145,178,0.09);
  --ff-body:  'Inter', sans-serif;
  --ff-mono:  'Space Mono', monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --nav-h: 64px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--ff-body);
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 32px; }

/* NAV */
nav#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h); display: flex; align-items: center;
  background: rgba(244,246,250,0.95);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
nav .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.nav-logo { font-family: var(--ff-mono); font-size: 0.88rem; letter-spacing: 0.04em; color: var(--text); font-weight: 700; }
.nav-logo .dot { color: var(--accent); }
.nav-back {
  font-family: var(--ff-mono); font-size: 0.72rem;
  letter-spacing: 0.08em; color: var(--muted);
  padding: 5px 12px; border: 1px solid var(--border2);
  border-radius: 3px; transition: all 0.2s;
}
.nav-back:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-lt); }

/* HERO of detail page */
.detail-hero {
  padding-top: calc(var(--nav-h) + 60px);
  padding-bottom: 56px;
  background: linear-gradient(160deg, #e8edf8 0%, #f4f6fa 55%, #eaf3fb 100%);
  position: relative;
  border-bottom: 1px solid var(--border);
}
.detail-hero::before {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(29,78,216,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29,78,216,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
}
.detail-hero .container { position: relative; }

.breadcrumb {
  font-family: var(--ff-mono); font-size: 0.7rem;
  letter-spacing: 0.08em; color: var(--muted); margin-bottom: 28px;
}
.breadcrumb a { color: var(--muted); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { opacity: 0.4; margin: 0 6px; }
.breadcrumb em { color: var(--text); font-style: normal; font-weight: 600; }

.detail-tag {
  display: inline-block;
  font-family: var(--ff-mono); font-size: 0.7rem;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 18px;
}

.detail-title {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 700; letter-spacing: -0.025em;
  line-height: 1.05; color: var(--text); margin-bottom: 28px;
  max-width: 860px;
}
.detail-title .hl { color: var(--accent); }

.detail-meta {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px;
}
.meta-pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.78rem; color: var(--text2);
  background: var(--surface); border: 1px solid var(--border);
  padding: 7px 14px; border-radius: 20px;
}
.meta-pill strong {
  font-family: var(--ff-mono); font-size: 0.62rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted); font-weight: 700;
}

.detail-lead {
  font-size: 1.05rem; color: var(--text2);
  max-width: 780px; line-height: 1.7;
}

/* MAIN CONTENT */
.detail-section { padding: 72px 0; background: var(--bg); }
.content-grid {
  display: grid; grid-template-columns: 1fr 320px; gap: 60px;
  align-items: start;
}
.content-main h2 {
  font-size: 1.35rem; font-weight: 700; color: var(--text);
  margin-top: 36px; margin-bottom: 14px; letter-spacing: -0.015em;
  padding-bottom: 8px; border-bottom: 2px solid var(--accent-lt);
}
.content-main h2:first-child { margin-top: 0; }
.content-main p {
  font-size: 0.96rem; color: var(--text2);
  line-height: 1.85; margin-bottom: 14px;
}
.content-main ul {
  list-style: none; padding: 0; margin: 0 0 16px;
}
.content-main ul li {
  position: relative; padding-left: 22px; margin-bottom: 8px;
  font-size: 0.94rem; color: var(--text2); line-height: 1.7;
}
.content-main ul li::before {
  content: '▸'; position: absolute; left: 0; top: 0;
  color: var(--accent); font-size: 0.8rem;
}
.content-main strong { color: var(--text); font-weight: 600; }

.skill-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.skill-pill {
  font-size: 0.78rem; padding: 6px 14px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px; color: var(--text2); font-weight: 500;
  transition: all 0.2s;
}
.skill-pill:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-lt); }

/* SIDEBAR */
.content-aside { display: flex; flex-direction: column; gap: 18px; position: sticky; top: calc(var(--nav-h) + 24px); }
.aside-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 22px;
}
.aside-card h3 {
  font-family: var(--ff-mono); font-size: 0.65rem;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent2); font-weight: 700; margin-bottom: 14px;
  padding-bottom: 10px; border-bottom: 2px solid var(--accent-lt2);
}
.aside-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 9px 0; font-size: 0.82rem;
  border-bottom: 1px solid var(--border);
}
.aside-row:last-child { border-bottom: none; }
.aside-row span {
  font-family: var(--ff-mono); font-size: 0.62rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted);
}
.aside-row strong { color: var(--text); font-weight: 600; text-align: right; }
.aside-text { font-size: 0.85rem; color: var(--text2); line-height: 1.7; }

.aside-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 11px 18px; border: 1.5px solid var(--accent);
  color: var(--accent); border-radius: 4px;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.02em;
  transition: all 0.2s;
}
.aside-btn:hover { background: var(--accent); color: #fff; }

/* GALLERY */
.gallery-section { padding: 72px 0; background: var(--surface); border-top: 1px solid var(--border); }
.gallery-title {
  font-size: 1.5rem; font-weight: 700; color: var(--text);
  margin-bottom: 28px; letter-spacing: -0.02em;
}
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.gallery-item {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 6px; overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.gallery-item:hover {
  border-color: rgba(29,78,216,0.25);
  box-shadow: 0 6px 22px rgba(29,78,216,0.08);
  transform: translateY(-2px);
}
.gallery-ph {
  height: 200px; display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  background: linear-gradient(135deg, var(--accent-lt) 0%, var(--accent-lt2) 100%);
}
.gallery-caption {
  padding: 14px 18px; font-size: 0.82rem; color: var(--text2);
  border-top: 1px solid var(--border);
}

/* Support for real images */
.gallery-img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-img {
  transform: scale(1.03);
}

/* NEXT-PREV / FOOTER NAVIGATION */
.page-nav {
  padding: 56px 0; background: var(--bg2); border-top: 1px solid var(--border);
}
.page-nav-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
}
.page-nav-link {
  display: block; padding: 24px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; transition: all 0.2s;
}
.page-nav-link:hover { border-color: var(--accent); box-shadow: 0 6px 24px rgba(29,78,216,0.06); }
.page-nav-link .pn-label {
  font-family: var(--ff-mono); font-size: 0.62rem;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
  margin-bottom: 6px;
}
.page-nav-link .pn-title { font-size: 0.98rem; color: var(--text); font-weight: 600; }
.page-nav-link.next { text-align: right; }

/* FOOTER */
footer { border-top: 1px solid var(--border); padding: 32px 0; background: var(--bg2); }
footer .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-name { font-family: var(--ff-mono); font-size: 0.82rem; color: var(--text2); font-weight: 700; }
.footer-name span { color: var(--accent); }
.footer-copy { font-family: var(--ff-mono); font-size: 0.65rem; letter-spacing: 0.08em; color: var(--muted); }
.footer-contact { display: flex; gap: 18px; font-size: 0.75rem; color: var(--muted); font-family: var(--ff-mono); letter-spacing: 0.04em; }
.footer-contact a:hover { color: var(--accent); }

/* RESPONSIVE */
@media (max-width: 900px) {
  .content-grid { grid-template-columns: 1fr; gap: 36px; }
  .content-aside { position: static; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .page-nav-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .container { padding: 0 18px; }
  .gallery-grid { grid-template-columns: 1fr; }
  .detail-meta { flex-direction: column; align-items: flex-start; }
}