/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --steel:     #0D1117;
  --steel2:    #161B22;
  --steel3:    #21262D;
  --steel4:    #30363D;
  --cyan:      #00BFBF;
  --cyan-dim:  #007A7A;
  --cyan-glow: rgba(0,191,191,0.12);
  --amber:     #F0A500;
  --silver:    #8B949E;
  --silver2:   #6E7681;
  --text:      #E6EDF3;
  --text-muted:#8B949E;
  --border:    #30363D;
  --white:     #ffffff;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--steel);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; color: #00DFDF; }

/* ===== NAV ===== */
#navbar {
  position: sticky; top: 0; z-index: 200;
  background: rgba(13,17,23,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex; align-items: center;
  padding: 0 1.5rem;
  height: 56px;
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-family: 'Space Mono', 'Rajdhani', monospace;
  font-size: 13px; font-weight: 700;
  color: var(--white);
  white-space: nowrap;
  letter-spacing: 0.05em;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-brand::before {
  content: '';
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan);
}
.nav-brand span { color: var(--cyan); }

.nav-toggle {
  display: none;
  background: none; border: none;
  color: var(--text); font-size: 20px;
  cursor: pointer; padding: 4px 8px;
}

.nav-links {
  display: flex; align-items: center; gap: 0;
  flex-wrap: nowrap;
}

.nav-links a, .dropbtn {
  color: var(--silver);
  font-size: 12px; font-weight: 500;
  padding: 0 14px; height: 56px;
  display: flex; align-items: center;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  background: none; border-top: none; border-left: none; border-right: none;
  cursor: pointer; font-family: inherit;
}
.nav-links a:hover, .nav-links a.active,
.dropbtn:hover, .dropdown:hover .dropbtn {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  text-decoration: none;
  background: rgba(0,191,191,0.04);
}

/* Dropdown */
.dropdown { position: relative; }
.dropdown-menu {
  display: none;
  position: absolute; top: 56px; left: 0;
  background: var(--steel2);
  border: 1px solid var(--border);
  border-radius: 4px;
  min-width: 240px;
  z-index: 300;
  padding: 4px 0;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,191,191,0.1);
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a {
  height: auto; padding: 10px 16px;
  border-bottom: none;
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.dropdown-menu a:hover {
  background: var(--cyan-glow);
  color: var(--cyan);
}

/* ===== PAGE HERO ===== */
.page-hero {
  background: var(--steel2);
  position: relative; overflow: hidden;
  padding: 72px 2rem 56px;
  display: flex; flex-direction: column;
  justify-content: flex-end; align-items: center;
  min-height: 200px;
  border-bottom: 1px solid var(--border);
}

/* Blueprint grid */
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,191,191,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,191,191,0.06) 1px, transparent 1px),
    linear-gradient(rgba(0,191,191,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,191,191,0.02) 1px, transparent 1px);
  background-size: 80px 80px, 80px 80px, 20px 20px, 20px 20px;
  pointer-events: none;
}

.page-hero::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 100%, rgba(0,191,191,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative; z-index: 2;
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}

.hero-eyebrow {
  font-family: 'Space Mono', monospace;
  font-size: 10px; letter-spacing: 0.15em;
  color: var(--cyan);
  text-transform: uppercase;
  opacity: 0.8;
}

.hero-content h1 {
  font-family: 'Space Grotesk', 'Rajdhani', sans-serif;
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

/* ===== HOME HERO (special) ===== */
.home-hero {
  min-height: 380px;
  justify-content: center;
  padding: 80px 2rem;
}

.home-hero .hero-content {
  gap: 20px;
}

.home-hero h1 {
  font-size: clamp(36px, 6vw, 72px);
}

.hero-subtitle {
  font-size: 14px;
  color: var(--silver);
  max-width: 500px;
  text-align: center;
  line-height: 1.6;
}

.hero-tags {
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: center;
  margin-top: 8px;
}

.hero-tag {
  font-family: 'Space Mono', monospace;
  font-size: 10px; letter-spacing: 0.1em;
  color: var(--cyan-dim);
  border: 1px solid var(--cyan-dim);
  padding: 4px 10px; border-radius: 2px;
  text-transform: uppercase;
}

/* ===== ABOUT PAGE ===== */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  max-width: 960px;
  margin: 52px auto;
  padding: 0 2rem;
  flex: 1;
}

.about-info .info-block { margin-bottom: 28px; }

.data-row {
  display: flex;
  font-size: 13px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.data-row:last-child { border-bottom: none; }
.data-label {
  font-family: 'Space Mono', monospace;
  font-size: 10px; letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan-dim);
  min-width: 110px;
  padding-top: 1px;
}
.data-value { color: var(--text); }

.bio {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 28px;
  padding: 16px;
  background: var(--steel2);
  border-left: 2px solid var(--cyan);
  border-radius: 0 4px 4px 0;
}

.section-mini-title {
  font-family: 'Space Mono', monospace;
  font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.section-mini-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-top: 4px; }
.two-col ul { list-style: none; padding: 0; }
.two-col ul li {
  font-size: 13px; color: var(--text-muted);
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
}
.two-col ul li::before {
  content: '▸';
  color: var(--cyan);
  font-size: 10px;
  flex-shrink: 0;
}
.two-col ul li:last-child { border-bottom: none; }

.about-photo { display: flex; justify-content: center; align-items: flex-start; }

.photo-card {
  width: 240px;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: var(--steel2);
}
.photo-placeholder {
  width: 100%; height: 280px;
  background: linear-gradient(160deg, #1a2535 0%, #0f1a2a 100%);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 14px;
}
.photo-initials {
  width: 80px; height: 80px;
  background: var(--steel3);
  border: 2px solid var(--cyan-dim);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 26px; font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.05em;
}
.photo-placeholder p { font-size: 11px; color: var(--silver2); letter-spacing: 0.08em; }
.photo-meta {
  padding: 12px 14px;
  border-top: 1px solid var(--border);
}
.photo-meta p {
  font-family: 'Space Mono', monospace;
  font-size: 10px; color: var(--silver2);
  letter-spacing: 0.06em;
  line-height: 1.8;
}
.photo-meta strong { color: var(--cyan); }

/* ===== CONTENT PAGE ===== */
.content-page {
  max-width: 900px;
  margin: 48px auto;
  padding: 0 2rem;
  flex: 1;
}

/* Op header */
.op-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.op-number {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--cyan);
  background: var(--cyan-glow);
  border: 1px solid var(--cyan-dim);
  padding: 4px 10px;
  border-radius: 3px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.op-header h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px; font-weight: 600;
  color: var(--text);
}

/* Two-column intro */
.op-intro {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 2.5rem;
  margin-bottom: 40px;
  align-items: start;
}

.op-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.op-table th {
  text-align: left; padding: 8px 12px;
  background: var(--steel3);
  border: 1px solid var(--border);
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  color: var(--cyan-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.op-table td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  background: var(--steel2);
}
.op-table tr:hover td { background: var(--steel3); }
.op-table td:first-child {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--cyan);
}

/* Section description text */
.op-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 760px;
  margin-bottom: 32px;
}

/* Step list */
.op-list { list-style: none; padding: 0; margin-bottom: 32px; counter-reset: steps; }
.op-list > li {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px; color: var(--text-muted); line-height: 1.6;
}
.op-list > li > span { flex: 1; }
.op-list > li:last-child { border-bottom: none; }
.op-list > li::before {
  counter-increment: steps;
  content: counter(steps);
  font-family: 'Space Mono', monospace;
  font-size: 11px; color: var(--cyan);
  background: var(--cyan-glow);
  border: 1px solid var(--cyan-dim);
  width: 22px; height: 22px;
  border-radius: 3px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.op-sublist {
  list-style: none;
  margin: 8px 0 0 0;
  padding: 0;
  width: 100%;
}
.op-sublist li {
  font-size: 13px;
  color: var(--text-muted);
  padding: 4px 0 4px 4px;
  display: flex; align-items: baseline; gap: 8px;
}
.op-sublist li::before {
  content: '–';
  color: var(--cyan-dim);
  flex-shrink: 0;
}

.step-block {
  margin-bottom: 32px;
}

.step-label {
  font-family: 'Space Mono', monospace;
  font-size: 10px; letter-spacing: 0.1em;
  color: var(--cyan-dim);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.step-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* Captioned */
.captioned { text-align: center; margin-bottom: 24px; }
.captioned img { width: 100%; border-radius: 4px; display: block; border: 1px solid var(--border); }
.captioned p {
  font-family: 'Space Mono', monospace;
  font-size: 11px; color: var(--silver2);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

/* Screenshot grid */
.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.screenshot-grid img { width: 100%; border-radius: 4px; display: block; border: 1px solid var(--border); }

.step-caption {
  font-size: 13px; color: var(--text-muted);
  margin-bottom: 16px;
  padding: 10px 14px;
  background: var(--steel2);
  border-left: 2px solid var(--steel4);
  border-radius: 0 4px 4px 0;
  font-style: italic;
}

/* Image placeholders */
.img-placeholder {
  background: linear-gradient(160deg, #161b22 0%, #0d1117 100%);
  border: 1px solid var(--border);
  border-radius: 4px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 10px;
  color: var(--silver2);
  font-size: 11px;
  font-family: 'Space Mono', monospace;
  letter-spacing: 0.04em;
  position: relative;
  overflow: hidden;
}
.img-placeholder::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,191,191,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,191,191,0.03) 1px, transparent 1px);
  background-size: 20px 20px;
}
.img-placeholder svg { opacity: 0.3; position: relative; z-index: 1; }
.img-placeholder span { position: relative; z-index: 1; text-align: center; padding: 0 16px; }
.img-placeholder.tall { height: 300px; }
.img-placeholder.medium { height: 220px; }
.img-placeholder.small { height: 160px; }

.img-placeholder.catia {
  background: linear-gradient(160deg, #0e1726 0%, #06101d 100%);
  border-color: #1e3056;
}
.img-placeholder.catia-dialog {
  background: linear-gradient(160deg, #1a1408 0%, #110e04 100%);
  border-color: #3a2e10;
}

/* ===== GALLERY ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.gallery-item {
  background: var(--steel2);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.gallery-item:hover { border-color: var(--cyan-dim); }
.gallery-item .img-placeholder, .gallery-item img {
  width: 100%; height: 240px;
  border-radius: 0;
  border: none;
  border-bottom: 1px solid var(--border);
}
.gallery-item .gallery-meta {
  padding: 12px 14px;
}
.gallery-item .gallery-meta p {
  font-family: 'Space Mono', monospace;
  font-size: 11px; color: var(--silver2);
  letter-spacing: 0.04em;
}
.gallery-item .gallery-meta strong {
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  font-weight: 600;
  display: block;
  margin-bottom: 2px;
}

/* ===== FOOTER ===== */
footer {
  background: var(--steel2);
  border-top: 1px solid var(--border);
  padding: 24px 2rem;
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
footer p {
  font-family: 'Space Mono', monospace;
  font-size: 11px; color: var(--silver2);
  letter-spacing: 0.04em;
}
footer span { color: var(--cyan); }

.footer-right {
  font-family: 'Space Mono', monospace;
  font-size: 10px; color: var(--steel4);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  #navbar { position: relative; }
  .nav-links {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    position: absolute; top: 56px; left: 0; right: 0;
    background: var(--steel2);
    border-bottom: 1px solid var(--border);
    gap: 0;
    z-index: 100;
  }
  .nav-links.open { display: flex; }
  .nav-links a, .dropbtn {
    height: auto; padding: 12px 20px; width: 100%;
    border-bottom: 1px solid var(--border) !important;
    border-bottom-color: var(--border) !important;
  }
  .dropdown { width: 100%; }
  .dropdown-menu {
    position: static; box-shadow: none;
    border: none; border-radius: 0;
    background: rgba(0,191,191,0.04);
    padding: 0;
  }
  .dropdown:hover .dropdown-menu { display: none; }
  .dropdown.open .dropdown-menu { display: block; }
  .dropdown-menu a { padding-left: 36px; }

  .about-layout { grid-template-columns: 1fr; }
  .about-photo { order: -1; justify-content: flex-start; }
  .two-col { grid-template-columns: 1fr; }
  .op-intro { grid-template-columns: 1fr; }
  .screenshot-grid { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; text-align: center; }
  .home-hero { min-height: 280px; }
}

@media (max-width: 480px) {
  .screenshot-grid { grid-template-columns: 1fr; }
  .hero-tags { gap: 6px; }
}