:root {
  --bg: #0b0f1a;
  --bg-alt: #101526;
  --text: #e6e9f0;
  --muted: #a8b0c7;
  --primary: #7c5cff;
  --primary-acc: #9b87ff;
  --glass: rgba(255,255,255,0.08);
  --border: rgba(255,255,255,0.12);
}

[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-alt: #ffffff;
  --text: #1c2230;
  --muted: #53607a;
  --primary: #6b4eff;
  --primary-acc: #8a72ff;
  --glass: rgba(0,0,0,0.05);
  --border: rgba(0,0,0,0.12);
}

* { box-sizing: border-box; }
html, body { padding: 0; margin: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
img { 
  max-width: 100%; 
  display: block; 
  border-radius: 14px;
  filter: brightness(0.85) contrast(1.1);
  transition: filter 0.3s ease;
}

[data-theme="light"] img {
  filter: brightness(1.1) contrast(0.95);
}
a { color: var(--primary); text-decoration: none; }

.container { width: min(1100px, 92%); margin: 0 auto; }
.section { padding: 80px 0; }
.section.alt { background: var(--bg-alt); }


.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(10px);
  background: linear-gradient(180deg, rgba(0,0,0,0.25), rgba(0,0,0,0));
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 4%;
}
.logo { font-family: 'Poppins', sans-serif; font-weight: 700; letter-spacing: .4px; color: var(--text); }
.logo span { color: var(--primary); }
.nav { display: flex; gap: 24px; }
.nav a { color: var(--text); opacity: .85; }
.nav a:hover { opacity: 1; }
.btn.icon { background: transparent; border: 1px solid var(--border); color: var(--text); padding: 8px; border-radius: 10px; cursor: pointer; }
.btn.icon:hover { border-color: var(--primary); color: var(--primary); }
.btn.icon svg { width: 22px; height: 22px; }


.hero { position: relative; overflow: hidden; }
.hero-bg {
  position: absolute; inset: -200px -50px -50px -50px; z-index: -1;
  background: radial-gradient(600px 300px at 20% 10%, rgba(124,92,255,0.25), transparent),
              radial-gradient(600px 300px at 80% 50%, rgba(0,200,255,0.15), transparent);
}
.hero-content { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; padding: 80px 0; }
.hero-text h1 { font-size: clamp(2rem, 5vw, 3.4rem); margin: 0; }
.subtitle { font-weight: 600; color: var(--primary); }
.lead { color: var(--muted); max-width: 60ch; }
.hero-actions { display: flex; gap: 12px; margin-top: 18px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 18px; border-radius: 12px; border: 1px solid var(--border); cursor: pointer; }
.btn.primary { background: var(--primary); color: white; border-color: transparent; }
.btn.primary:hover { background: var(--primary-acc); }
.btn.ghost { background: transparent; color: var(--text); }
.btn.small { padding: 8px 12px; font-size: .9rem; }
.hero-meta { display: flex; gap: 16px; margin-top: 14px; color: var(--muted); }
.hero-image { position: relative; animation: fadeInScale 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.98) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.hero-image img { box-shadow: 0 12px 40px rgba(0,0,0,0.35); }
.glass-card {
  position: absolute; bottom: 14px; left: 14px;
  background: var(--glass); border: 1px solid var(--border); backdrop-filter: blur(8px);
  padding: 12px 16px; border-radius: 14px; max-width: 300px;
}
.glass-card h3 { margin: 0; color: #e6e9f0; }
.glass-card p { margin: 6px 0 0; color: #a8b0c7; }


.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }


.tags { list-style: none; padding: 0; margin: 16px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { padding: 6px 10px; border-radius: 999px; border: 1px solid var(--border); background: var(--glass); color: var(--text); font-size: .9rem; }


.card { 
  background: var(--glass); 
  border: 1px solid var(--border); 
  border-radius: 16px; 
  overflow: hidden; 
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.card.project:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(124, 92, 255, 0.15);
  border-color: var(--primary);
}

.card-body { padding: 16px; }
.case { margin-bottom: 24px; padding: 24px; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.case:hover { transform: translateY(-4px); box-shadow: 0 8px 32px rgba(0,0,0,0.3); }
.case-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.case-header svg { width: 24px; height: 24px; color: var(--primary); flex-shrink: 0; }
.case h3 { margin: 0; color: var(--primary); font-size: 1.3rem; }
.case .case-context { font-style: italic; color: var(--muted); margin-bottom: 16px; }
.case ul { list-style: none; padding: 0; margin: 16px 0 0; }
.case li { margin-bottom: 8px; }
.case strong { color: var(--text); }
.timeline { position: relative; margin-left: 14px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 0; bottom: 0; width: 2px; background: var(--border); }
.timeline-item { position: relative; padding-left: 28px; margin: 18px 0; }
.timeline-item .dot-primary { position: absolute; left: 0; top: 6px; width: 14px; height: 14px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 3px rgba(124,92,255,0.25); }
.timeline-item .dot { position: absolute; left: 0; top: 6px; width: 14px; height: 14px; border-radius: 50%; background: grey; box-shadow: 0 0 0 3px rgba(124,92,255,0.25); }
.pill { font-size: .8rem; background: var(--primary); color: white; padding: 2px 8px; border-radius: 999px; margin-left: 8px; }


.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.skill { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px; }
.skill .bar { --height: 8px; --bg: rgba(255,255,255,0.08); position: relative; width: 240px; height: var(--height); background: var(--bg); border-radius: 999px; overflow: hidden; }
.skill .bar::after { content: ""; position: absolute; inset: 0; width: calc(var(--value) * 1%); background: var(--primary); }


.section-description { color: var(--muted); margin-top: -10px; margin-bottom: 30px; line-height: 1.5; }
.text-center { text-align: center; }
.contact-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 12px; }
.contact-list.centered { justify-content: center; }


.site-footer { border-top: 1px solid var(--border); padding: 24px 0; background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0)); }
.footer-grid { display: grid; grid-template-columns: 1fr auto; align-items: center; }
.social { display: flex; gap: 10px; }
.social a { display: inline-flex; padding: 8px; border: 1px solid var(--border); border-radius: 10px; color: var(--text); }
.social a:hover { color: var(--primary); border-color: var(--primary); }


.skip-link { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.skip-link:focus { left: 8px; top: 8px; width: auto; height: auto; padding: 8px 12px; background: var(--primary); color: #fff; border-radius: 8px; }


.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; will-change: opacity, transform; }
.reveal.in { opacity: 1; transform: translateY(0); }


@media (max-width: 900px) {
  .hero-content { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .cards { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .site-header .nav { display: none; }
}


.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}
.back-to-top:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}
.back-to-top.show {
  opacity: 1;
  visibility: visible;
}
.back-to-top svg {
  width: 20px;
  height: 20px;
}

.project-media {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  border-radius: 14px 14px 0 0;
  filter: brightness(0.85) contrast(1.1);
  transition: filter 0.3s ease;
}

[data-theme="light"] .project-media {
  filter: brightness(1.1) contrast(0.95);
}