/* ============================================================
   Osama Sleem — Portfolio design system (dark mode)
   Concept unchanged: computer-vision annotation aesthetic —
   corner brackets, confidence tags, coordinate hairlines — now
   on a deep space canvas with a colorful, category-coded accent
   system (each project domain gets its own signal color, the
   way a detection model color-codes classes).
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  --bg: #0B0D12;
  --bg-2: #0E1117;
  --surface: #131720;
  --surface-2: #1A1F2B;
  --ink: #F3F4F7;
  --ink-soft: #A7ADBB;
  --ink-faint: #6B7180;
  --line: #232837;
  --line-strong: #333A4D;

  /* category-coded accent family — same family, distinct hues */
  --violet: #8B5CF6;
  --violet-soft: rgba(139,92,246,0.14);
  --cyan: #22D3EE;
  --cyan-soft: rgba(34,211,238,0.14);
  --pink: #F472B6;
  --pink-soft: rgba(244,114,182,0.14);
  --green: #34D399;
  --green-soft: rgba(52,211,153,0.14);
  --amber: #FBBF24;
  --amber-soft: rgba(251,191,36,0.14);

  --accent: var(--violet);
  --accent-soft: var(--violet-soft);

  --font-display: 'Space Grotesk', ui-sans-serif, sans-serif;
  --font-body: 'Inter', ui-sans-serif, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
  --max: 1080px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection{ background: var(--violet); color: #fff; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; display: block; }

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- eyebrow / mono tag language ---------- */
.tag{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: #C4B5FD;
  background: var(--violet-soft);
  border: 1px solid rgba(139,92,246,0.55);
  border-radius: 3px;
  padding: 2px 7px;
  display: inline-block;
  white-space: nowrap;
}
.tag.neutral{
  color: var(--ink-soft);
  background: var(--surface-2);
  border-color: var(--line-strong);
}
.tag.genai{ color:#D6C9FF; background: var(--violet-soft); border-color: rgba(139,92,246,0.55); }
.tag.cv3d{ color:#9EEBFA; background: var(--cyan-soft); border-color: rgba(34,211,238,0.55); }
.tag.medimg{ color:#FAC3E1; background: var(--pink-soft); border-color: rgba(244,114,182,0.55); }
.tag.cv{ color:#A8F0D3; background: var(--green-soft); border-color: rgba(52,211,153,0.55); }
.tag.ml{ color:#FCE29B; background: var(--amber-soft); border-color: rgba(251,191,36,0.55); }

.eyebrow{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: #C4B5FD;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
}
.eyebrow::before{ content: "["; color: var(--violet); }
.eyebrow::after{ content: "]"; color: var(--violet); }

/* corner-bracket frame — the recurring signature element */
.bracket-frame{
  position: relative;
  border: 1px solid var(--line);
  background: var(--surface);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.bracket-frame::before,
.bracket-frame::after{
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid var(--violet);
  transition: border-color 0.2s ease;
}
.bracket-frame::before{ top: -1px; left: -1px; border-right: none; border-bottom: none; }
.bracket-frame::after{ top: -1px; right: -1px; border-left: none; border-bottom: none; }

.card.bracket-frame:hover{
  border-color: var(--line-strong);
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -22px rgba(139,92,246,0.45);
}

/* ---------- header / nav ---------- */
.site-header{
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(11,13,18,0.85);
  backdrop-filter: blur(8px);
  z-index: 20;
}
.site-header .wrap{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand{
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.01em;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.brand .dot{ color: var(--cyan); }
nav.primary-nav{
  display: flex;
  gap: 28px;
  font-family: var(--font-mono);
  font-size: 13.5px;
}
nav.primary-nav a{
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  transition: color 0.15s ease;
}
nav.primary-nav a:hover, nav.primary-nav a[aria-current="page"]{ color: var(--ink); }
nav.primary-nav a[aria-current="page"]::after{
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}
.nav-toggle{ display: none; }

@media (max-width: 720px){
  nav.primary-nav{
    display: none;
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    padding: 8px 28px 18px;
  }
  nav.primary-nav.open{ display: flex; }
  nav.primary-nav a{ padding: 10px 0; border-bottom: 1px solid var(--line); }
  .nav-toggle{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border: 1px solid var(--line-strong);
    background: none;
    color: var(--ink);
    border-radius: 3px;
    font-family: var(--font-mono);
    cursor: pointer;
  }
}

/* ---------- headings / type scale ---------- */
h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  margin: 0;
  letter-spacing: -0.01em;
  color: var(--ink);
}
h1{ font-size: clamp(38px, 6vw, 64px); }
h2{ font-size: clamp(26px, 3.4vw, 34px); }
h3{ font-size: 19px; }
p{ margin: 0; }
.lede{
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 56ch;
}

.gradient-text{
  background: linear-gradient(100deg, var(--violet) 0%, var(--cyan) 55%, var(--pink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section{ padding: 76px 0; border-bottom: 1px solid var(--line); }
.section:last-of-type{ border-bottom: none; }
.section-head{
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

/* ---------- buttons ---------- */
.btn{
  font-family: var(--font-mono);
  font-size: 13.5px;
  padding: 11px 18px;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-strong);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.btn.primary{
  background: linear-gradient(100deg, var(--violet), #6D6BFF 60%, var(--cyan));
  color: #0B0D12;
  border-color: transparent;
  font-weight: 500;
}
.btn.primary:hover{ box-shadow: 0 10px 30px -12px rgba(139,92,246,0.6); }
.btn.ghost{ background: transparent; color: var(--ink); }
.btn.ghost:hover{ border-color: var(--cyan); color: var(--cyan); }
.btn-row{ display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- hero ---------- */
.hero{ padding: 64px 0 76px; position: relative; overflow: hidden; }
.hero-grid{
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
  position: relative;
  z-index: 1;
}
@media (max-width: 860px){ .hero-grid{ grid-template-columns: 1fr; } }

.hero h1{ margin-top: 6px; }
.hero .role{
  font-family: var(--font-mono);
  color: var(--ink-soft);
  font-size: 16px;
  margin-top: 14px;
}
.hero .lede{ margin-top: 18px; }
.hero .btn-row{ margin-top: 30px; }

.glow-orb{
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
  z-index: 0;
  pointer-events: none;
}
.glow-orb.one{ width: 420px; height: 420px; background: var(--violet); top: -160px; left: -120px; }
.glow-orb.two{ width: 360px; height: 360px; background: var(--cyan); top: -60px; right: -140px; opacity: 0.22; }

.hero-panel{
  padding: 22px;
  font-family: var(--font-mono);
}
.hero-panel .panel-title{
  font-size: 12px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.stat-list{ list-style: none; margin: 0; padding: 0; }
.stat-list li{
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-top: 1px dashed var(--line-strong);
  font-size: 13px;
  color: var(--ink-soft);
}
.stat-list li:first-child{ border-top: none; }
.stat-list .num{ color: var(--cyan); font-weight: 500; }

/* ---------- cards / project grid ---------- */
.grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px){ .grid{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px){ .grid{ grid-template-columns: 1fr; } }

.card{
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 100%;
}
.card .card-tags{ display: flex; gap: 6px; flex-wrap: wrap; }
.card h3{ margin-top: 2px; }
.card p.desc{ color: var(--ink-soft); font-size: 14.5px; flex-grow: 1; }
.card .metrics{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.card .metrics span{
  background: var(--cyan-soft);
  border: 1px solid rgba(34,211,238,0.4);
  border-radius: 3px;
  padding: 2px 6px;
}
.card .card-link{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  border-top: 1px solid var(--line);
  padding-top: 12px;
  margin-top: 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color 0.15s ease;
}
.card .card-link:hover{ color: var(--cyan); }

/* ---------- timeline (experience) ---------- */
.timeline{ display: flex; flex-direction: column; }
.tl-item{
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.tl-item:first-child{ border-top: none; }
@media (max-width: 700px){ .tl-item{ grid-template-columns: 1fr; gap: 8px; } }
.tl-date{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  padding-top: 3px;
}
.tl-role{ font-family: var(--font-display); font-weight: 600; font-size: 18px; color: var(--ink); }
.tl-org{ color: var(--ink-soft); font-size: 14.5px; margin-top: 2px; }
.tl-body ul{ margin: 12px 0 0; padding-left: 18px; }
.tl-body li{ margin-bottom: 7px; font-size: 14.5px; color: var(--ink-soft); }
.tl-body li::marker{ color: var(--cyan); }

/* ---------- skills ---------- */
.skill-group{ margin-bottom: 26px; }
.skill-group h3{
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  font-weight: 500;
  margin-bottom: 12px;
}
.chip-row{ display: flex; flex-wrap: wrap; gap: 8px; }
.chip{
  font-family: var(--font-mono);
  font-size: 12.5px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  padding: 5px 10px;
  color: var(--ink-soft);
  background: var(--surface);
  transition: border-color 0.15s ease, color 0.15s ease;
}
.chip:hover{ border-color: var(--violet); color: var(--ink); }

/* ---------- misc lists (education, awards, publications) ---------- */
.info-list{ display: flex; flex-direction: column; gap: 22px; }
.info-item{ border-top: 1px solid var(--line); padding-top: 18px; }
.info-item:first-child{ border-top: none; padding-top: 0; }
.info-item .meta{ font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-faint); margin-top: 4px; }
.info-item p.desc{ margin-top: 10px; color: var(--ink-soft); font-size: 14.5px; }

/* ---------- contact ---------- */
.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 700px){ .contact-grid{ grid-template-columns: 1fr; } }
.contact-card{
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.contact-card .k{
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.contact-card .v{ font-size: 16.5px; color: var(--ink); transition: color 0.15s ease; }
.contact-card:hover .v{ color: var(--cyan); }

/* ---------- footer ---------- */
footer.site-footer{
  border-top: 1px solid var(--line);
  padding: 34px 0;
  margin-top: 0;
}
footer.site-footer .wrap{
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
}
footer.site-footer a{ color: var(--ink-soft); transition: color 0.15s ease; }
footer.site-footer a:hover{ color: var(--cyan); }
.footer-links{ display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- coordinate hairline backdrop for hero ---------- */
.grid-backdrop{ position: relative; }
.grid-backdrop::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.5;
  pointer-events: none;
  z-index: -1;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, #000 40%, transparent 100%);
}

/* ---------- page hero (non-home pages) ---------- */
.page-hero{ padding: 56px 0 44px; }
.page-hero h1{ font-size: clamp(32px, 5vw, 46px); }
.page-hero .lede{ margin-top: 14px; }

a:focus-visible,
button:focus-visible{
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ============================================================
   Single-page additions — feature blocks, media cards, in-page nav
   ============================================================ */

/* section anchor offset for sticky header */
section[id]{ scroll-margin-top: 84px; }

/* ---------- flagship feature projects (image/video-led) ---------- */
.feature-project{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 52px;
  align-items: center;
  padding: 64px 0;
  border-top: 1px solid var(--line);
}
.feature-project:first-child{ border-top: none; padding-top: 0; }
.feature-project.reverse{ grid-template-columns: 0.95fr 1.05fr; }
.feature-project.reverse .feature-media{ order: 2; }
.feature-project.reverse .feature-copy{ order: 1; }
@media (max-width: 860px){
  .feature-project, .feature-project.reverse{ grid-template-columns: 1fr; gap: 26px; }
  .feature-project.reverse .feature-media,
  .feature-project.reverse .feature-copy{ order: initial; }
}

.feature-media{
  position: relative;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 10px;
  overflow: hidden;
}
.feature-media::before,
.feature-media::after{
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--cyan);
  z-index: 2;
  pointer-events: none;
}
.feature-media::before{ top: 10px; left: 10px; border-right: none; border-bottom: none; }
.feature-media::after{ bottom: 10px; right: 10px; border-left: none; border-top: none; }
.feature-media{
  display: flex;
  align-items: center;
  justify-content: center;
  max-height: 460px;
}
.feature-media img,
.feature-media video{
  width: 100%;
  height: 100%;
  max-height: 460px;
  display: block;
  object-fit: contain;
  background: #05070B;
}

.feature-copy .card-tags{ display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.feature-copy h3{ font-size: clamp(22px, 2.6vw, 28px); margin-bottom: 12px; }
.feature-copy p.desc{ color: var(--ink-soft); font-size: 15.5px; margin-bottom: 16px; }
.feature-copy .metrics{
  font-family: var(--font-mono); font-size: 12.5px; color: var(--cyan);
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px;
}
.feature-copy .metrics span{
  background: var(--cyan-soft); border: 1px solid rgba(34,211,238,0.4);
  border-radius: 3px; padding: 3px 8px;
}

/* ---------- dense project grid with media thumbnails ---------- */
.card-media{
  margin: -22px -22px 4px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  max-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #05070B;
}
.card-media img{ width: 100%; height: 100%; max-height: 240px; object-fit: contain; display: block; transition: transform 0.4s ease; }
.card:hover .card-media img{ transform: scale(1.04); }

.card-media.placeholder{
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 18px 18px;
  background-color: var(--surface-2);
}
.card-media.placeholder .glyph{ font-size: 26px; opacity: 0.85; }
.card-media.placeholder .cap{
  font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint);
  text-transform: uppercase; letter-spacing: 0.06em;
}

/* ---------- in-page nav ---------- */
nav.primary-nav a[href^="#"]{ cursor: pointer; }

/* ---------- divider label between major page parts ---------- */
.section-divider{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
}
.section-divider::after{
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}