/* =========================================================
   NVIDIA Cosmos Lab — Shared Stylesheet
   ========================================================= */

/* ---------- NVIDIA Sans (NALA region) ---------- */
@font-face {
  font-family: 'NVIDIA-NALA';
  src: url('https://images.nvidia.com/etc/designs/nvidiaGDC/clientlibs_base/fonts/nvidia-sans/NALA/var/NVIDIASansVF_NALA_W_Wght.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'NVIDIA-NALA';
  src: url('https://images.nvidia.com/etc/designs/nvidiaGDC/clientlibs_base/fonts/nvidia-sans/NALA/NVIDIASans_NALA_W_Lt.woff2') format('woff2');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'NVIDIA-NALA';
  src: url('https://images.nvidia.com/etc/designs/nvidiaGDC/clientlibs_base/fonts/nvidia-sans/NALA/NVIDIASans_NALA_W_Rg.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'NVIDIA-NALA';
  src: url('https://images.nvidia.com/etc/designs/nvidiaGDC/clientlibs_base/fonts/nvidia-sans/NALA/NVIDIASans_NALA_W_Md.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'NVIDIA-NALA';
  src: url('https://images.nvidia.com/etc/designs/nvidiaGDC/clientlibs_base/fonts/nvidia-sans/NALA/NVIDIASans_NALA_W_Bd.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
/* ---------- JetBrains Mono (code blocks) ---------- */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  --green:         #76b900;
  --hero-bg:       transparent;
  --bg:            #111111;
  --bg-card:       #1d1d1d;
  --bg-section:    #191919;
  --text-1:        #f0f0f0;
  --text-2:        #999999;
  --text-3:        #606060;
  --border:        rgba(255, 255, 255, 0.20);
  --shadow:        0 2px 6px rgba(0,0,0,0.6), 0 6px 24px rgba(0,0,0,0.5), 0 1px 0 rgba(255,255,255,0.06) inset;
  --shadow-hover:  0 8px 20px rgba(0,0,0,0.8), 0 20px 48px rgba(0,0,0,0.6), 0 1px 0 rgba(255,255,255,0.10) inset;
  --footer-bg:     #0a0a0a;
  --radius-sm:     6px;
  --radius:        12px;
  --content-max:   1280px;
  --transition:    0.25s ease;
  --text-xs:       0.75rem;
  --text-sm:       0.9rem;
  --text-md:       0.875rem;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 18px;
}

body {
  font-family: 'NVIDIA-NALA', Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ---------- Site Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #000000;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}
.site-header.scrolled {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.header-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px);
  height: 50px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo a {
  text-decoration: none;
  display: flex;
  align-items: center;
}
.site-logo-img {
  height: 38px;
  width: auto;
}
.site-logo-label {
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 1.0);
  padding-left: 10px;
  border-left: 1px solid rgba(255, 255, 255, 0.2);
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.header-nav a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  position: relative;
}
.header-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transition: transform 0.2s ease;
  border-radius: 1px;
}
.header-nav a:hover { color: #ffffff; }
.header-nav a:hover::after { transform: scaleX(1); }

/* ---------- Hamburger ---------- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
  flex-shrink: 0;
  background: none;
  border: none;
  min-width: 44px;
  min-height: 44px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Focus Styles ---------- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---------- Section Layout ---------- */
.section-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px);
}

.section-heading {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 700;
  color: var(--text-1);
  padding-left: 14px;
  border-left: 5px solid var(--green);
  margin-bottom: 8px;
}
.section-sub {
  font-size: 0.95rem;
  color: var(--text-2);
  padding-left: 19px;
  margin-bottom: 32px;
}
.section-sub a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Hero ---------- */
.hero {
  min-height: calc(100svh - 50px);
  background: var(--hero-bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-content {
  position: relative;
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-lab-name {
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
  line-height: 1.1;
  margin-bottom: 20px;
}
.hero-lab-name span { color: #76b900; }
.hero-sub {
  position: absolute;
  top: 60%;
  left: 0;
  right: 0;
  font-size: 1.2rem;
  color: rgba(255,255,255,0.8);
  max-width: 550px;
  line-height: 1.6;
  margin: 0 auto;
  text-align: center;
}
@media (prefers-reduced-motion: no-preference) {
  .hero-sub  { animation: fadeUp 0.6s 0.2s both; }
  .hero-chips { animation: fadeUp 0.6s 0.4s both; }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: none; }
  }
}
.hero-chips {
  position: absolute;
  top: 75%;
  left: 0;
  right: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 0 clamp(16px, 4vw, 48px);
}
.hero-chip {
  border: 1px solid rgba(118,185,0,0.4);
  background: rgba(118,185,0,0.08);
  color: #76b900;
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 1rem;
  font-weight: 500;
}
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: #76b900;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  letter-spacing: 0;
  text-transform: uppercase;
}
@media (prefers-reduced-motion: no-preference) {
  .hero-scroll svg { animation: bounceY 1.5s ease-in-out infinite; }
  @keyframes bounceY {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(8px); }
  }
}

/* ---------- Hero Video Wrap ---------- */

/* ---------- Background Video ---------- */
.bg-video-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.bg-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
  filter: saturate(0.9) brightness(1.0);
}
.bg-video-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 70% 65% at 50% 50%,
    transparent 0%,
    rgba(0, 0, 0, 0.52) 50%,
    rgba(0, 0, 0, 0.92) 80%,
    rgba(0, 0, 0, 0.98) 100%
  );
}
@media (prefers-reduced-motion: reduce) {
  .bg-video-wrap { display: none; }
}

/* ---------- Main/Pub View Toggle ---------- */
#main-view,
#pub-view {
  transition: opacity 0.5s ease, transform 0.5s ease;
}
#pub-view {
  opacity: 0;
  pointer-events: none;
  transform: translateY(30px);
  display: none;
}
#pub-view.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  display: block;
}
#main-view.hidden,
#main-view.fading-out {
  opacity: 0;
  pointer-events: none;
}

/* ---------- Highlights Section (Products & Press Releases) ---------- */
.highlights-section {
  padding: 72px 0;
  --section-bg: var(--bg-section);
  background: var(--section-bg);
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 4px;
}
.highlights-section .highlights-grid {
  grid-template-columns: repeat(2, 1fr);
}

.press-card {
  position: relative;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}
.press-card:hover {
  border-color: rgba(118,185,0,0.65);
  box-shadow: var(--shadow-hover), 0 0 0 1.5px rgba(118,185,0,0.6), 0 0 18px rgba(118,185,0,0.5);
}
.press-card a { display: block; color: inherit; border-radius: var(--radius); overflow: hidden; }

.press-media-wrap {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #111;
}
.highlights-section .press-media-wrap {
  aspect-ratio: 2/1;
}
.press-media-wrap img,
.press-media-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.55);
  transition: transform 0.2s ease, filter 0.15s ease;
}
.press-card:hover .press-media-wrap img,
.press-card:hover .press-media-wrap video {
  filter: brightness(0.85);
}
@media (prefers-reduced-motion: no-preference) {
  .press-card:hover .press-media-wrap img,
  .press-card:hover .press-media-wrap video {
    transform: scale(1.03);
  }
}

.press-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.85) 0%,
    rgba(0,0,0,0.70) 12%,
    rgba(0,0,0,0.50) 28%,
    rgba(0,0,0,0.28) 46%,
    rgba(0,0,0,0.10) 65%,
    rgba(0,0,0,0)    100%
  );
  box-shadow: inset 0 0 22px 10px rgba(0,0,0,0.55);
  pointer-events: none;
  transition: background 0.15s;
}
.press-card:hover .press-overlay {
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.70) 0%,
    rgba(0,0,0,0.50) 16%,
    rgba(0,0,0,0.28) 36%,
    rgba(0,0,0,0.08) 58%,
    rgba(0,0,0,0)    100%
  );
}

.press-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 14px;
  line-height: 1.2em;
}
.press-info p {
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  text-shadow: 0 1px 4px rgba(0,0,0,0.70);
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.press-date {
  color: rgba(255,255,255,0.65);
  font-size: 0.72rem;
  font-weight: 500;
  pointer-events: none;
}

/* ---------- Overflow / Show More ---------- */
.overflow-wrap {
  position: relative;
  transition: max-height 0.42s cubic-bezier(0.4, 0, 0.2, 1);
}
.highlights-section .overflow-wrap {
  padding: 20px 20px 0;
  margin: -20px -20px 0;
}
.overflow-fade {
  position: absolute;
  bottom: 0;
  left: 0;
  transition: opacity 0.3s ease;
  right: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--section-bg));
  pointer-events: none;
}
.highlights-section .overflow-fade {
  height: 160px;
  background: linear-gradient(to bottom, transparent 0%, var(--section-bg) 80%);
}
.show-more-btn {
  display: block;
  margin: 16px auto 0;
  padding: 8px 28px;
  border: 1px solid var(--green);
  color: var(--green);
  border-radius: var(--radius-sm);
  font-size: var(--text-md);
  background: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.show-more-btn:hover {
  background: var(--green);
  color: #fff;
}

/* ---------- Products Section ---------- */
/* ---------- About Section ---------- */
.about-section {
  padding: 64px 0;
  background: var(--bg-section);
  border-top: 1px solid var(--border);
}
.about-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 28px;
}
.about-text {
  max-width: 780px;
  font-size: 1.0rem;
  line-height: 1.5;
  color: rgba(255,255,255,0.72);
  text-align: left;
}
.about-text p { margin-bottom: 12px; }
.about-text p:last-child { margin-bottom: 0; }
.about-text strong { color: rgba(255,255,255,0.92); }
.about-text ul {
  margin: 12px 0 16px 0;
  padding-left: 2.2em;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.about-text li { list-style: disc; color: rgba(255,255,255,0.92); font-weight: 500; }
.about-pub-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: transparent;
  text-decoration: none;
  padding: 15px 40px;
  border-radius: 100px;
  border: 1.5px solid rgba(118,185,0,0.6);
  box-shadow: 0 0 18px rgba(118,185,0,0.18), inset 0 0 18px rgba(118,185,0,0.06);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}
.about-pub-link::after {
  content: '→';
  display: inline-block;
  transition: transform 0.2s ease;
}
.about-pub-link:hover {
  color: var(--green);
  border-color: rgba(118,185,0,0.9);
  box-shadow: 0 0 32px rgba(118,185,0,0.35), inset 0 0 24px rgba(118,185,0,0.1);
}
.about-pub-link:hover::after {
  transform: translateX(5px);
}

.about-pub-link--primary {
  background: rgba(118,185,0,0.18);
  border-color: rgba(118,185,0,0.85);
  box-shadow: 0 0 28px rgba(118,185,0,0.28), inset 0 0 20px rgba(118,185,0,0.1);
}
.about-pub-link--primary:hover {
  background: rgba(118,185,0,0.38);
  border-color: var(--green);
  box-shadow: 0 0 48px rgba(118,185,0,0.55), inset 0 0 28px rgba(118,185,0,0.18);
  color: #fff;
}

.products-section {
  padding: 72px 0;
  --section-bg: var(--bg);
  background: var(--section-bg);
  border-top: 1px solid var(--border);
}

/* ---------- Product Cards ---------- */
.product-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}
.product-card:hover {
  border-color: rgba(118,185,0,0.65);
  box-shadow: var(--shadow-hover), 0 0 0 1.5px rgba(118,185,0,0.6), 0 0 18px rgba(118,185,0,0.5);
}
.product-media {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #111;
}
.product-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.2s ease;
}
@media (prefers-reduced-motion: no-preference) {
  .product-card:hover .product-media video { transform: scale(1.03); }
}
.product-info {
  padding: 20px 20px 18px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex: 1;
}
.product-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-1);
}
.product-desc {
  font-size: var(--text-sm);
  color: var(--text-2);
  line-height: 1.5;
}
.product-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 8px;
}
.product-links a {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--green);
  text-decoration: none;
  letter-spacing: 0;
  padding: 5px 14px;
  border-radius: 100px;
  border: 1px solid rgba(118,185,0,0.35);
  background: rgba(118,185,0,0.06);
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.product-links a:hover {
  background: rgba(118,185,0,0.15);
  border-color: rgba(118,185,0,0.65);
  color: #fff;
}

/* ---------- Publications Section ---------- */
.publications-section {
  padding: 72px 0 48px;
  border-top: 1px solid var(--border);
  --section-bg: var(--bg);
  background: var(--section-bg);
}

.pub-year-header {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-3);
  padding: 28px 0 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}
.pub-year-header:first-child { padding-top: 0; }

.pub-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-top: 4px;
}

.pub-card {
  display: flex;
  align-items: stretch;
  background: color-mix(in srgb, var(--bg-card) 97%, #76b900 3%);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
  margin-bottom: 20px;
}
.pub-card:hover {
  border-color: rgba(118,185,0,0.65);
  box-shadow: var(--shadow-hover), 0 0 0 1.5px rgba(118,185,0,0.6), 0 0 18px rgba(118,185,0,0.5);
}

.pub-teaser {
  flex: 0 0 220px;
  overflow: hidden;
  position: relative;
  background: var(--bg-section);
}
.pub-teaser::after {
  content: '';
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 20px 8px rgba(0,0,0,0.55);
  pointer-events: none;
}
.pub-teaser img,
.pub-teaser video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.pub-content {
  flex: 1;
  padding: 12px 14px 10px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.4;
}
.pub-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 8px;
}
.pub-authors {
  font-size: var(--text-md);
  color: var(--text-2);
  line-height: 1.4;
  margin-bottom: 8px;
}
.pub-venue {
  font-size: var(--text-md);
  color: #d4a030;
  flex: 1;
}
.pub-venue strong { color: #c09030; }
.pub-preprint { color: #7a9e72; }
.pub-award { color: #ed673b; font-weight: 500; }
.pub-award::before { content: ' · '; color: #bbb; }

.pub-links {
  font-size: var(--text-md);
  font-weight: 500;
  padding-top: 8px;
}
.pub-links a {
  color: var(--green);
  transition: opacity var(--transition);
}
.pub-links a:hover { color: #fff; }
.pub-sep { color: rgba(255,255,255,0.4); }


/* ---------- Scroll Reveal ---------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Site Footer ---------- */
.site-footer {
  background: var(--footer-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px clamp(16px, 4vw, 48px);
}
.global-footer {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}
.global-footer__logo {
  height: 30px;
  width: auto;
  display: block;
}
.global-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 0;
  list-style: none;
  padding: 0;
  margin: 0;
}
.global-footer__links li {
  display: flex;
  align-items: center;
}
.global-footer__links li:not(:last-child)::after {
  content: '·';
  color: #444;
  padding: 0 10px;
}
.global-footer__links a {
  color: #777;
  font-size: 0.78rem;
  transition: color var(--transition);
}
.global-footer__links a:hover { color: #fff; }
.global-footer__region { font-size: var(--text-sm); }
.global-footer__region a { color: #777; transition: color var(--transition); }
.global-footer__region a:hover { color: #fff; }
.global-footer__region__label { pointer-events: none; }
.global-footer__copyright { color: #888; font-size: var(--text-xs); }

/* ---------- Responsive ---------- */
@media (max-width: 639px) {
  .hamburger { display: flex; }
  .header-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: #000;
    z-index: 999;
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-left: 0;
  }
  .header-nav.open { display: flex; }
  .header-nav a { padding: 10px 20px; border-radius: 0; }
  .header-nav a::after { display: none; }

  .highlights-section .highlights-grid,
  .products-section .highlights-grid { grid-template-columns: 1fr; }
  .pub-teaser { display: none; }
}

@media (max-width: 479px) {
}