:root {
  --bg: #0d0f17;
  --bg-2: #101320;
  --text: #e8ecf1;
  --muted: #98a2b3;
  --accent: #7c5cff;
  --accent-2: #15e3b8;
  --card: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.12);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 1200px at 10% 10%, rgba(124,92,255,0.12), transparent 60%),
              radial-gradient(1000px 1000px at 90% 30%, rgba(21,227,184,0.10), transparent 60%),
              linear-gradient(160deg, var(--bg), var(--bg-2) 60%);
  overflow-x: hidden;
}

#bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 22px;
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  backdrop-filter: saturate(140%) blur(12px);
  background: linear-gradient(180deg, rgba(13,15,23,0.9), rgba(13,15,23,0.55));
  border-bottom: 1px solid var(--border);
  z-index: 5;
}
.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  margin: 0 18px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}
.site-header nav a:hover { 
  color: var(--text);
  background: rgba(255,255,255,0.1);
}
.site-header nav a.active {
  color: var(--accent);
  background: rgba(255,255,255,0.1);
}
.site-header nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

main { position: relative; z-index: 1; min-height: 100vh; }

/* Page System */
.page {
  display: none;
  min-height: calc(100vh - 80px);
  padding-top: 80px;
}
.page.active {
  display: block;
}
.page-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.page-content h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 40px;
  text-align: center;
  color: var(--text);
}

/* Page Header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
  gap: 20px;
}
.pipeline-image {
  flex-shrink: 0;
}
.pipeline-image img {
  max-width: 300px;
  height: auto;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.hero {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.hero-content {
  max-width: 1200px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
  padding: 0 40px 0 60px;
}
.hero-text {
  max-width: 600px;
  flex: 1.2;
  padding-right: 40px;
}
.hero-image {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0.8;
}

/* Mobile and Desktop specific image placement */
.mobile-only {
  display: none;
}

.desktop-only {
  display: flex;
}


.avatar {
  width: 260px;
  height: 260px;
  border-radius: 16px;
  object-fit: cover;
  border: 2px solid rgba(255,255,255,0.1);
  box-shadow: 
    0 20px 60px rgba(0,0,0,0.3),
    0 8px 32px rgba(0,0,0,0.2);
  transition: all 0.3s ease;
  position: relative;
}

.avatar:hover {
  transform: translateY(-4px);
  box-shadow: 
    0 32px 80px rgba(0,0,0,0.4),
    0 16px 48px rgba(0,0,0,0.3);
}
.hero-text h1 {
  margin: 0 0 8px;
  font-size: 38px;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.accent { 
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); 
  -webkit-background-clip: text; 
  background-clip: text; 
  color: transparent;
  font-weight: 800;
}
.subtitle { 
  color: var(--muted); 
  margin: 0 0 12px; 
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.hero-text p {
  font-size: 15px;
  line-height: 1.6;
  margin: 0 0 20px;
  color: var(--text);
  max-width: 520px;
}
.cta-row { 
  margin-top: 16px; 
  display: flex; 
  flex-wrap: wrap; 
}
.cta-row .button {
  margin-right: 12px;
  margin-bottom: 8px;
}
.cta-row .button:last-child {
  margin-right: 0;
}
.hero-text .socials {
  margin-top: 16px;
  display: flex;
  justify-content: flex-start;
}
.hero-text .socials .icon-btn {
  margin-right: 10px;
}
.hero-text .socials .icon-btn:last-child {
  margin-right: 0;
}
.hero-text .icon-btn {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  transition: all 0.2s ease;
}
.hero-text .icon-btn:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}
.hero-text .icon-btn svg,
.hero-text .icon-btn img {
  width: 16px;
  height: 16px;
  display: block;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}
.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}
.button.primary { 
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); 
  border: none; 
  color: white;
  font-weight: 700;
}
.button.primary:hover {
  box-shadow: 0 8px 25px rgba(124, 92, 255, 0.4);
}
.button.secondary {
  background: rgba(255,255,255,0.05);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.button.secondary:hover {
  background: rgba(255,255,255,0.1);
}

.section { padding: 38px 20px; display: grid; place-items: center; }
.section h2 { max-width: 980px; width: 100%; margin: 0 0 18px; }

.timeline { position: relative; max-width: 980px; width: 100%; margin: 20px auto; }
.timeline:before { content: ""; position: absolute; left: 12px; top: 0; bottom: 0; width: 2px; background: linear-gradient(var(--accent), var(--accent-2)); opacity: 0.5; }
.timeline-item { position: relative; padding-left: 44px; margin: 40px 0; }
.timeline-item .dot { position: absolute; left: 6px; top: 10px; width: 14px; height: 14px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(124,92,255,0.2); }
.timeline-item .content { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px 24px; }
.timeline-item h3 { margin: 0 0 6px; }
.meta { color: var(--muted); margin: 0; }
/* Experience logos */
.timeline-item h3 { display: flex; align-items: center; gap: 12px; }
.timeline-item h3 .logo { width: 36px; height: 36px; object-fit: cover; border-radius: 8px; border: 1px solid var(--border); }
.timeline-item h3 { flex-wrap: wrap; }
.timeline-item .content h3,
.timeline-item .content p { overflow-wrap: anywhere; word-break: break-word; }

.cards { list-style: none; padding: 0; margin: 0; max-width: 980px; width: 100%; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.card { position: relative; background: var(--card); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; transition: all 0.3s ease; display: flex; flex-direction: column; }
.card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); box-shadow: var(--shadow); }
.card-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  position: relative;
  background: rgba(255,255,255,0.05);
  display: flex;
  align-items: center;
  justify-content: center;
}
.card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}
.card:hover .card-image img {
  transform: scale(1.05);
}
.card-content {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.card-content h3 { color: #fff; margin: 0 0 8px; font-size: 1.1rem; font-weight: 600; }
.card-content p { color: var(--muted); line-height: 1.6; flex: 1; margin: 0; }
.stretched-link { position: absolute; inset: 0; border-radius: inherit; z-index: 5; }
.stretched-link:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; border-radius: inherit; }

/* Awards List */
.awards-list { list-style: none; padding: 0; margin: 0; max-width: 980px; width: 100%; display: grid; gap: 20px; }
.award { background: var(--card); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; transition: all 0.3s ease; display: flex; gap: 20px; align-items: flex-start; }
.award:hover { background: rgba(255,255,255,0.08); transform: translateY(-2px); box-shadow: var(--shadow); }
.award-image {
  flex-shrink: 0;
  width: 300px;
  height: 200px;
  overflow: hidden;
  border-radius: 12px;
  position: relative;
  background: rgba(255,255,255,0.05);
}
.award-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.award:hover .award-image img {
  transform: scale(1.05);
}
.award-content {
  flex: 1;
  padding: 20px;
  display: flex;
  flex-direction: column;
}
.award-content h3 { margin: 0 0 8px; font-size: 1.1rem; font-weight: 600; line-height: 1.4; color: var(--text); }
.award-content .meta { color: var(--muted); margin-bottom: 8px; font-size: 0.95rem; }
.award-content a { color: var(--accent-2); text-decoration: none; font-weight: 600; }
.award-content a:hover { text-decoration: underline; }
.github-icon {
  display: inline-block;
  margin-right: 6px;
  vertical-align: middle;
}

.pub-list { list-style: none; padding: 0; margin: 0; max-width: 980px; width: 100%; display: grid; gap: 20px; }
.pub { background: var(--card); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; transition: all 0.3s ease; display: flex; gap: 20px; align-items: flex-start; }
.pub:hover { background: rgba(255,255,255,0.08); transform: translateY(-2px); box-shadow: var(--shadow); }
.pub-image {
  flex-shrink: 0;
  width: 300px;
  height: 200px;
  overflow: hidden;
  border-radius: 12px;
  position: relative;
  background: rgba(255,255,255,0.05);
  display: flex;
  align-items: center;
  justify-content: center;
}
.pub-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}
.pub:hover .pub-image img {
  transform: scale(1.05);
}
.pub-content {
  flex: 1;
  padding: 20px;
  display: flex;
  flex-direction: column;
}
.pub-content h3 { margin: 0 0 8px; font-size: 1.1rem; font-weight: 600; line-height: 1.4; color: var(--text); }
.pub-content .meta { color: var(--muted); margin-bottom: 8px; font-size: 0.95rem; }
.pub-content a { color: var(--accent-2); text-decoration: none; font-weight: 600; }
.pub-content a:hover { text-decoration: underline; }

/* Slideshow */
.slideshow-container {
  position: relative;
  width: 100%;
  height: 100%;
}
.slideshow {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: 12px;
  background: rgba(255,255,255,0.05);
  display: flex;
  align-items: center;
  justify-content: center;
}
.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.5s ease;
  object-fit: contain;
}
.slide.active {
  opacity: 1;
}

.footer { padding: 16px 20px 24px; text-align: center; color: var(--muted); }
.footer .contact { 
  display: flex; 
  align-items: center; 
  justify-content: center; 
  margin-bottom: 4px; 
  flex-wrap: wrap; 
}
.footer .contact p {
  margin: 0;
  color: var(--text);
  font-size: 14px;
}
.footer .socials { display: inline-flex; gap: 8px; }
.footer .icon-btn { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 8px; border: 1px solid var(--border); background: rgba(255,255,255,0.06); color: var(--text); }
.footer .icon-btn svg { width: 16px; height: 16px; display: block; }
.footer .icon-btn:hover { filter: brightness(1.15); }

/* Experiments (projects) */
.project-cards { list-style: none; padding: 0; margin: 0; max-width: 980px; width: 100%; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.project-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 16px; min-height: 120px; }
.project-header { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.git-icon { width: 18px; height: 18px; color: var(--muted); flex: 0 0 auto; }
.project-title { color: var(--text); text-decoration: none; font-weight: 700; }
.project-title:hover { text-decoration: underline; }
.project-desc { color: var(--muted); margin: 0; }

@media (max-width: 768px) {
  .site-header nav a {
    margin: 0 8px;
    padding: 6px 10px;
    font-size: 0.9rem;
  }
  .page-header {
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }
  .pipeline-image img {
    max-width: 250px;
  }
  .award {
    flex-direction: column;
    gap: 16px;
  }
  .award-image {
    width: 100%;
    height: 250px;
  }
  .pub {
    flex-direction: column;
    gap: 16px;
  }
  .pub-image {
    width: 100%;
    height: 250px;
  }
  .hero-content {
    flex-direction: column;
    text-align: center;
    padding: 0 20px 0 30px;
  }
  .hero-text {
    margin-bottom: 40px;
    padding-right: 0;
  }
  
  /* Mobile: Show image after title, hide desktop image */
  .mobile-only {
    display: flex;
    margin: 20px 0;
  }
  
  .desktop-only {
    display: none;
  }
  .avatar {
    width: 240px;
    height: 240px;
  }
}

/* Tighten layout for small screens */
@media (max-width: 560px) {
  .hero-text h1 { font-size: 28px; }
  .subtitle { font-size: 14px; }
  .section { padding: 28px 16px; }
  .timeline:before { left: 8px; }
  .timeline-item { padding-left: 34px; }
  .timeline-item .dot { left: 2px; }
  .timeline-item h3 .logo { width: 28px; height: 28px; }
  .cards, .project-cards, .pub-list { grid-template-columns: 1fr; }
}

/* Nice smooth scrolling */
html { scroll-behavior: smooth; }

/* Floating audio toggle */
.audio-toggle {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.03));
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  box-shadow: var(--shadow);
  z-index: 6;
}
.audio-toggle:hover { filter: brightness(1.1); }

/* Enhanced audio controls (wrapper + slider). Placed after to override above. */
.audio-controls {
  position: fixed;
  right: 18px;
  bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.03));
  box-shadow: var(--shadow);
  z-index: 6;
}
.audio-controls .audio-toggle {
  position: static;
  right: auto;
  bottom: auto;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: transparent;
  font-size: 16px;
}
.audio-toggle .icon { width: 20px; height: 20px; display: none; }
.audio-toggle.on .icon-on { display: block; }
.audio-toggle.off .icon-off { display: block; }

.audio-volume {
  -webkit-appearance: none;
  appearance: none;
  width: 130px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,0.18);
  outline: none;
}
.audio-volume::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border: 1px solid var(--border);
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}
.audio-volume::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border: 1px solid var(--border);
}

@media (max-width: 520px) {
  .audio-controls { gap: 8px; padding: 6px 10px; }
  .audio-volume { width: 90px; }
}