/* Base styles */

body {
  margin: 40px 0 0 0;
  font-family: 'Manrope', Arial, Helvetica, sans-serif;
  background: #fff;
  color: #111;
  overflow-x: hidden;
}

/* Smooth scroll behavior */
html {
  scroll-behavior: smooth;
}

/* Scroll Animation Styles */
.fade-in {
  animation: fadeIn 1.2s ease-out forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scroll-fade {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.scroll-fade.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animation for project sections */
.project.scroll-fade.visible {
  animation: slideInUp 0.8s ease-out forwards;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* NeurIPS Announcement Banner */
.neurips-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  background: #000;
  color: #fff;
  z-index: 10001;
  padding: 10px 20px;
  font-size: 14px;
  font-family: 'Manrope', Arial, sans-serif;
}

.announcement-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.announcement-text {
  display: inline-block;
}

.announcement-close {
  background: none;
  border: none;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.announcement-close:hover {
  opacity: 1;
}

.frame {
  margin: 0 auto;
  max-width: 100%;
  min-height: 100vh;
  background: #fff;
  padding: 0;
  box-sizing: border-box;
  position: relative;
}

/* Header - full width with wider spacing */
.header {
  position: fixed;
  top: 40px;
  left: 0;
  right: 0;
  width: 100vw;
  z-index: 1000;
  transition: all 0.3s ease;
  pointer-events: none;
}

.header-container {
  position: relative;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 0;
  transition: all 0.3s ease;
  z-index: 1;
}

.header.scrolled .header-container {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.15);
}

.header.scrolled .glass-container {
  opacity: 1;
}

.glass-container {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.glass-effect-backdrop {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.glass-effect {
  position: absolute;
  -webkit-backdrop-filter: url(#distortion);
  backdrop-filter: url(#distortion);
}

.glass-effect.top,
.glass-effect.bottom,
.glass-effect.left,
.glass-effect.right {
  width: 100%;
  height: 100%;
}

.glass-effect.top { top: 0; left: 0; right: 0; }
.glass-effect.bottom { bottom: 0; left: 0; right: 0; }
.glass-effect.left { left: 0; top: 0; bottom: 0; }
.glass-effect.right { right: 0; top: 0; bottom: 0; }

.header-content {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 8vw;
  font-size: 18px;
  font-weight: 400;
  width: 100%;
  box-sizing: border-box;
  gap: 0;
}

.header-content,
.header-content * {
  pointer-events: auto;
}

.header-spacer {
  flex: 1;
}

.logo {
  font-weight: 400;
  font-size: 20px;
  display: flex;
  align-items: center;
  line-height: 1;
  color: #000;
  font-family: 'Manrope', Arial, sans-serif;
}

/* Burger Menu Button */
.burger-menu {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: all 0.3s ease;
}

.burger-line {
  width: 28px;
  height: 2px;
  background: #000;
  transition: all 0.3s ease;
}

.burger-menu:hover .burger-line {
  background: #666;
}

/* Fullscreen Menu Overlay */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
              visibility 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Close Button */
.menu-close {
  position: absolute;
  top: 60px;
  right: 8vw;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  z-index: 10;
  opacity: 0;
  transform: rotate(-90deg);
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1) 0.2s,
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.2s;
}

.menu-overlay.active .menu-close {
  opacity: 1;
  transform: rotate(0deg);
}

.close-line {
  position: absolute;
  width: 28px;
  height: 2px;
  background: #fff;
  transition: all 0.3s ease;
}

.close-line:first-child {
  transform: rotate(45deg);
}

.close-line:last-child {
  transform: rotate(-45deg);
}

.menu-close:hover .close-line {
  background: #999;
}

/* Menu Navigation */
.menu-nav {
  position: absolute;
  bottom: 60px;
  left: 60px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.menu-item {
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.menu-overlay.active .menu-item:nth-child(1) {
  transition-delay: 0.1s;
  opacity: 1;
  transform: translateY(0);
}

.menu-overlay.active .menu-item:nth-child(2) {
  transition-delay: 0.2s;
  opacity: 1;
  transform: translateY(0);
}

.menu-overlay.active .menu-item:nth-child(3) {
  transition-delay: 0.3s;
  opacity: 1;
  transform: translateY(0);
}

.menu-overlay.active .menu-item:nth-child(4) {
  transition-delay: 0.4s;
  opacity: 1;
  transform: translateY(0);
}

.menu-link {
  font-family: 'Inria Serif', serif;
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 400;
  color: #fff;
  text-decoration: none;
  padding: 12px 0;
  display: inline-block;
  transition: color 0.3s ease;
  line-height: 1;
}

.menu-link:hover {
  color: #999;
}

.menu-divider {
  width: 80vw;
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
  margin: 6px 0 12px 0;
}

/* Hero Section - Full viewport height */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8vw;
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
}

.hero-title {
  font-family: 'Inria Serif', serif;
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 400;
  line-height: 1.2;
  text-align: center;
  margin: 0;
  color: #111;
}

/* Content Section - Appears on scroll */
.content-section {
  padding: 0 8vw 0 8vw;
  box-sizing: border-box;
}

/* Main content */
main { 
  padding: 0;
}

.intro { 
  margin-top: 54px; 
  margin-bottom: 45px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.subtitle {
  font-size: 18px;
  margin: 0 0 32px 0;
  color: #222;
  opacity: 0.8;
  line-height: 1.4;
  font-weight: 300;
  text-align: center;
  width: 100%;
  max-width: 900px;
}

/* Supports Section */
.supports-section {
  margin-top: 32px;
  width: 100%;
  max-width: 900px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.supports-label {
  font-size: 14px;
  color: #666;
  font-weight: 400;
  white-space: nowrap;
  flex-shrink: 0;
}

.supports-scroll-container {
  flex: 1;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(
    to right,
    transparent,
    black 20%,
    black 80%,
    transparent
  );
  -webkit-mask-image: linear-gradient(
    to right,
    transparent,
    black 20%,
    black 80%,
    transparent
  );
}

.supports-scroll {
  display: flex;
  gap: 40px;
  animation: scroll 20s linear infinite;
  width: fit-content;
}

.support-org {
  font-size: 14px;
  color: #999;
  font-weight: 400;
  letter-spacing: 1.5px;
  white-space: nowrap;
  flex-shrink: 0;
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.divider { 
  border: none; 
  border-top: 1px solid #dedede; 
  margin: 48px 0; 
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.project { 
  margin-bottom: 64px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.project img {
  width: 100%;
  height: auto;
  background: none;
  border: none;
  margin-bottom: 32px;
  transition: transform 0.5s ease, opacity 0.5s ease;
  position: relative;
  z-index: 1;
  display: block;
}

.project img:hover {
  transform: scale(1.005);
}

.project-index {
  color: #999;
  display: block;
  margin-bottom: 12px;
  font-weight: 400;
  font-size: 14px;
  letter-spacing: 0.5px;
}

.project-meta {
  margin-bottom: 20px;
}

.project-title { 
  font-size: 28px; 
  font-weight: 400; 
  margin-bottom: 6px;
  display: block;
  color: #111;
  line-height: 1.2;
}

.project-collaboration {
  font-size: 13px;
  color: #aaa;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  display: block;
}

.project-description {
  font-size: 18px;
  line-height: 1.65;
  color: #333;
  margin-bottom: 20px;
  font-weight: 400;
}

.project-footer {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 0;
}

.project-link {
  font-size: 14px;
  color: #666;
  font-weight: 400;
  display: flex;
  align-items: center;
  gap: 6px;
}

.project-link i {
  font-size: 12px;
  color: #999;
}

.project-tags {
  font-size: 14px;
  color: #666;
  font-weight: 400;
  display: flex;
  align-items: center;
  gap: 6px;
}

.project-tags i {
  font-size: 12px;
  color: #999;
}

/* Footer */
.footer-section {
  margin: 80px 0 0 0;
  padding: 0;
  max-width: none;
  width: 100%;
  box-sizing: border-box;
}

.footer-divider {
  width: calc(100% + 16vw);
  margin-left: -8vw;
  height: 1px;
  background: #e0e0e0;
  padding: 0;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 60px 0;
  box-sizing: border-box;
}

.footer-brand {
  display: flex;
  align-items: flex-start;
}

.footer-logo {
  font-family: 'Manrope', Arial, sans-serif;
  font-size: 20px;
  font-weight: 400;
  margin: 0;
  color: #111;
}

.footer-columns {
  display: flex;
  gap: 80px;
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: visible;
}

.footer-column-header {
  font-size: 15px;
  font-weight: 500;
  color: #111;
  margin: 0 0 8px 0;
  font-family: 'Manrope', Arial, sans-serif;
}

.footer-link {
  font-size: 15px;
  color: #666;
  text-decoration: none;
  transition: color 0.2s ease;
  font-weight: 400;
  display: inline-flex;
  align-items: center;
  width: fit-content;
  overflow: visible;
}

.footer-link:hover {
  color: #111;
}

.footer-bottom {
  padding: 24px 0;
}

.footer-copyright {
  font-size: 13px;
  color: #999;
  margin: 0;
  font-weight: 400;
}

/* Mobile responsive */
@media screen and (max-width: 780px) {
  body {
    margin-top: 32px;
  }

  .neurips-banner {
    font-size: 13px;
    padding: 7px 16px;
  }

  .announcement-close {
    font-size: 18px;
  }

  .header {
    top: 32px;
  }

  .header-content {
    padding: 20px 5vw;
  }

  .burger-line {
    width: 24px;
  }

  .close-line {
    width: 24px;
  }

  .menu-close {
    top: 52px;
    right: 5vw;
  }

  .menu-nav {
    bottom: 40px;
    left: 40px;
  }

  .menu-link {
    font-size: clamp(28px, 10vw, 48px);
    padding: 10px 0;
  }

  .menu-divider {
    margin: 4px 0 10px 0;
  }

  .hero-section {
    padding: 0 5vw;
  }

  .hero-title {
    font-size: clamp(28px, 8vw, 48px);
  }

  .content-section {
    padding: 0 5vw 0 5vw;
  }

  .subtitle {
    font-size: 16px;
  }

  .supports-section {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .project-title {
    font-size: 20px;
  }

  .project img {
    margin-bottom: 24px;
  }

  .footer-divider {
    width: calc(100% + 10vw);
    margin-left: -5vw;
  }

  .footer-container {
    flex-direction: column;
    gap: 40px;
    padding: 40px 0;
  }

  .footer-columns {
    flex-direction: column;
    gap: 32px;
  }

  .footer-bottom {
    padding: 20px 0;
  }
}

/* Tablet responsive */
@media screen and (min-width: 781px) and (max-width: 1024px) {
  .header-content {
    padding: 20px 6vw;
  }

  .hero-section {
    padding: 0 6vw;
  }

  .content-section {
    padding: 0 6vw 0 6vw;
  }

  .footer-divider {
    width: calc(100% + 12vw);
    margin-left: -6vw;
  }

  .footer-container {
    padding: 50px 0;
  }

  .footer-columns {
    gap: 60px;
  }

  .footer-bottom {
    padding: 22px 0;
  }
}