/* Main Styles */

:root {
  /* Color System */
  --color-primary: #4c19e8;
  --color-primary-light: #4c19e8;
  --color-primary-dark: #004e9c;
  
  --color-secondary: #b5afff;
  --color-secondary-light: #b5afff;
  --color-secondary-dark: #636366;
  
  --color-accent: #f56300;
  --color-accent-light: #ff8533;
  --color-accent-dark: #c55000;
  
  --color-success: #34c759;
  --color-warning: #ff9f0a;
  --color-error: #ff3b30;
  
  --color-neutral-100: #f5f5f7;
  --color-neutral-200: #e6e6e6;
  --color-neutral-300: #d1d1d6;
  --color-neutral-400: #a1a1a6;
  --color-neutral-500: #86868b;
  --color-neutral-600: #636366;
  --color-neutral-700: #48484a;
  --color-neutral-800: #2d2d2f;
  --color-neutral-900: #1d1d1f;
  
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray: #f0f2f5;
  --color-neon-light: #EAE8FF;
  
  /* Typography */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-md: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 2rem;      /* 32px */
  --font-size-4xl: 2.5rem;    /* 40px */
  --font-size-5xl: 3rem;      /* 48px */
  
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-semibold: 600;
  
  /* Spacing System (based on 8px) */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.5rem;    /* 24px */
  --space-6: 2rem;      /* 32px */
  --space-7: 2.5rem;    /* 40px */
  --space-8: 3rem;      /* 48px */
  --space-9: 4rem;      /* 64px */
  --space-10: 5rem;     /* 80px */
  
  /* Other Variables */
  --border-radius-sm: 0.25rem;  /* 4px */
  --border-radius-md: 0.5rem;   /* 8px */
  --border-radius-lg: 1rem;     /* 16px */
  --border-radius-xl: 1.5rem;   /* 24px */
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.05), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.05), 0 10px 10px rgba(0, 0, 0, 0.04);
  
  /* Container width */
  --container-max-width: 1000px;
  --container-padding: var(--space-4);
}

/* Global Styles */
body {
  color: var(--color-neutral-900);
  background-color: var(--color-gray);
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Typography */
h1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-5);
  color: var(--color-neutral-900);
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
  color: var(--color-neutral-900);
}

h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
  color: var(--color-neutral-900);
}

h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-neutral-900);
}

p {
  font-size: var(--font-size-md);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  color: var(--color-neutral-700);
  text-align: justify;
}

/* Buttons */
.button {
  display: inline-block;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-fast);
  text-align: center;
}

.button.primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.button.primary:hover {
  background-color: var(--color-primary-dark);
}

.button.secondary {
  background-color: var(--color-neutral-200);
  color: var(--color-neutral-900);
}

.button.secondary:hover {
  background-color: var(--color-neutral-300);
}

/* Sticky Header Styles */
.sticky-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: transparent;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  z-index: 1000;
  box-shadow: none;
}
.sticky-header.scrolled {
  background-color: rgba(255,255,255,0.95);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  backdrop-filter: blur(8px);
}

/* Sections */
section {
  padding: var(--space-9) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-7);
}

.section-header h2 {
  margin-bottom: var(--space-2);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-neutral-600);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Section */
.hero {
  padding-top: calc(var(--space-9) + 72px); /* Extra padding for fixed header */
  background: linear-gradient(to bottom, #EAE8FF 0%, #f0f2f5 100%);
}

.hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px;
}

.hero-content {
  flex: 1;
}

.hero-image {
  flex: 1;
}

.hero-image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.hero h1 {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-4);
}

.hero p {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-5);
}

.hero-buttons {
  display: flex;
  gap: var(--space-3);
}

/* About Section */
.about {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.about-content {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.about-image {
  flex: 1;
}

.about-image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.about-text {
  flex: 1;
}

.stats {
  display: flex;
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-neutral-600);
}

/* Features Section */
.features {
  background-color: var(--color-neutral-100);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}

.feature-card {
  background-color: var(--color-white);
  padding: var(--space-5);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-4);
  overflow: hidden;
  border-radius: var(--border-radius-lg);
}

.feature-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-card h3 {
  margin-bottom: var(--space-2);
  color: var(--color-neutral-900);
}

.feature-card p {
  color: var(--color-neutral-600);
  margin-bottom: 0;
}

/* Get Started Section */
.get-started {
  background-color: var(--color-white);
}

.cta-container {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.cta-content {
  flex: 1;
}

.cta-image {
  flex: 1;
}

.cta-image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.contact-form {
  margin-top: var(--space-5);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-neutral-700);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--border-radius-md);
  background-color: var(--color-white);
  color: var(--color-neutral-900);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

/* Footer */
footer {
  background-color: var(--color-neutral-900);
  color: var(--color-white);
  padding: var(--space-7) 0 var(--space-4);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.footer-logo {
  flex: 1;
}

.footer-logo .logo {
  color: var(--color-white);
  margin-bottom: var(--space-2);
  display: inline-block;
}

.footer-logo p {
  color: var(--color-neutral-400);
  margin-bottom: 0;
}

.footer-links {
  flex: 2;
  display: flex;
  gap: var(--space-6);
}

.footer-column h4 {
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.footer-column ul li {
  margin-bottom: var(--space-2);
}

.footer-column ul li a {
  color: var(--color-neutral-400);
  transition: color var(--transition-fast);
}

.footer-column ul li a:hover {
  color: var(--color-white);
}

.footer-bottom {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-neutral-700);
  text-align: center;
}

.footer-bottom p {
  color: var(--color-neutral-500);
  margin-bottom: 0;
  font-size: var(--font-size-sm);
}

#navbar > ul {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  list-style: none;
  margin: 0;
  padding: 0;
}


/* Remove nav-link underline animation */
.nav-link::after {
  display: none !important;
}

#header {
  padding: 0.5rem 1rem;
  background: var(--color-neon-light);
}

.navbar-container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin: 0;
  padding: 0;
  height: 100%;
  min-height: 60px;
  gap: 0.5rem;
}

.navbar-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  height: 100%;
}

.navbar-logo a {
  font-family: 'Playfair Display', serif;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
  line-height: 1;
  display: flex;
  align-items: center;
  height: 100%;
}

.navbar-logo-img {
  width: 100%;
  height: 64px;
}

.navbar-logo a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

#navbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  height: 100%;
  width: 100%;
  gap: 1rem;
}

.navbar-links-group {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
}

.nav-link {
  width: auto;
  padding: 2px 10px;
  border-radius: 999px;
  transition: color 0.2s;
  color: var(--color-neutral-700);
}

.nav-link.active,
.nav-link:active {
  background: var(--color-primary);
  color: #fff !important;
  padding: 2px 10px;
}

.nav-link:hover {
  background: var(--color-primary);
  color: #fff !important;
}

.navbar-title-group {
  display: flex;
  width: 100%;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
}

.navbar-title {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: auto;
  gap: 1rem;
  font-family: 'Palatino', 'Palatino Linotype', serif;
  font-weight: bold;
  font-size: 1.5rem;
  color: var(--color-primary);
}

#header .container {
  gap: 12px;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.bento-card {
  background: #fff;
  border-radius: 1.25rem;
  box-shadow: 0 2px 12px rgba(76,25,232,0.07);
  padding: 2rem 1.5rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: box-shadow 0.2s;
}
.bento-card:hover {
  box-shadow: 0 4px 24px rgba(76,25,232,0.13);
}
.bento-icon {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}
.bento-title {
  font-size: 1.4rem;
  line-height: 2rem;
  font-weight: bold;
  font-family: 'Palatino', 'Palatino Linotype', serif;
  color: var(--color-primary);
  transition: color 0.2s;
}
.bento-title:hover {
  color: var(--color-primary);
}

.bento-desc {
  font-size: 1.1rem;
  line-height: 1.5rem;
  font-weight: 400;
  font-family: 'Times New Roman', Times, serif;
  color: var(--color-neutral-700);
}

.schedule-table {
  width: 100%;
  overflow-x: auto;
  margin-top: 2rem;
  background: var(--color-white);
  padding: 1.5rem 1rem;
}
.schedule-table .table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1rem;
}
.schedule-table th, .schedule-table td {
  padding: 0.75rem 1rem;
  text-align: left;
}
.schedule-table th {
  background: var(--color-primary);
  color: #fff;
  font-weight: bold;
}
.schedule-table tr:nth-child(even) td {
  background: var(--color-neutral-100);
}

.schedule-table td {
  color: var(--color-neutral-900);
}

.section-header-component {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-end;
  padding-bottom: 4rem;
  gap: 8px;
  position: relative;
  width: 100%;
}
.section-header-row {
  box-sizing: border-box;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-end;
  gap: 10px;
  margin: 0 auto;
  width: 100%;
}
.section-header-title {
  font-family: 'Palatino', 'Palatino Linotype', serif;
  width: auto;
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-900);
}
.section-header-subtitle {
  width: auto;
  font-family: 'Inter', Arial, sans-serif;
  font-style: italic;
  font-weight: 200;
  font-size: 0.5rem;
  line-height: 1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #000;
}

.organizers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 2rem;
}
.organizer-card {
  background: var(--color-white);
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform 0.2s;
  text-decoration: none;
  color: inherit;
  border: 0.5px solid var(--color-neutral-200);
}
.organizer-card:hover {
  box-shadow: 0 4px 24px rgba(76,25,232,0.13);
  transform: scale(1.01);
  text-decoration: none;
}
.organizer-photo {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 1rem;
  border: 2px solid var(--color-primary);
}
.organizer-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}
.organizer-name {
  font-weight: bold;
  font-size: 1.1rem;
  color: var(--color-primary);
}
.organizer-org {
  font-size: 0.95rem;
  color: var(--color-neutral-700);
  margin-bottom: 0.25rem;
}
.organizer-info a {
  font-size: 0.9rem;
  color: var(--color-secondary);
  text-decoration: underline;
}

.pc-list-item {
  font-size: 0.9rem;
  color: var(--color-neutral-700);
}

.pc-list-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1.5rem;
  margin-top: 4em;
  margin-bottom: 1.5em;
  padding: 1rem;
  border: 1px solid var(--color-neutral-300);
  border-radius: 1rem;
}
.pc-list-grid > div {
  padding: 0.25em 0;
}

.display-text-palatino {
  font-family: 'Palatino', 'Palatino Linotype', serif;
  font-weight: bold;
  font-size: 3rem;
  color: #000;
  display: block;
  text-align: center;
  margin: 2rem 0 1rem 0;
}

.bento-section {
  display: flex;
  min-height: 60vh;
  align-items: start;
  max-width: 1000px;
  gap: 3rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-neutral-200);
}

.bento-image {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #eaeaea;
  border-radius: 0.5rem;
  overflow: hidden;
  min-width: unset;
  min-height: unset;
  max-width: 640px;
  margin: 0 auto;
}
.bento-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.bento-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
}
.bento-topic {
  display: flex;
  align-items: start;
  font-size: 2.2rem;
  color: var(--color-neutral-400);
  border-top: 1px solid var(--color-neutral-200);
  padding: 1.5rem 1rem;
  transition: color 0.2s;
  font-family: 'Inter', Arial, sans-serif;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.bento-topic .bento-num {
  font-size: 0.8rem;
  margin-right: 2rem;
  color: var(--color-neutral-800);
  opacity: 0.7;
  font-family: 'Inter', Arial, sans-serif;
  font-weight: 400;
}

.bento-topic-content {
  display: flex;
  flex-direction: column;
}

.footer-text {
  text-align: center;
  color: var(--color-neutral-400);
}

.contact-blockquote {
  text-align: center;
  margin: 2rem auto 6rem auto;
  font-size: 1.6rem;
  line-height: 1.6;
  font-family: 'Palatino', 'Palatino Linotype', serif;
  font-weight: bold;
  color: var(--color-neutral-700);
}

.contact-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 480px;
  margin: 2rem auto 2.5rem auto;
  padding: 1.5rem 1rem;
  background: var(--color-white);
  border-radius: 1.5rem;
  box-shadow: 0 2px 12px rgba(76,25,232,0.07);
}

.contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0 1.5rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  color: var(--color-neutral-700);
  text-decoration: none;
  transition: color 0.2s, text-decoration 0.2s;
  white-space: nowrap; /* Prevents breaking */
  width: auto;         /* Ensures it hugs content */
}
.contact-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.contact-link .arrow-upright {
  display: inline-block;
  width: 1em;
  height: 1em;
  margin-left: 0.15em;
  vertical-align: middle;
  stroke: currentColor;
}

.organizer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.organizer-contact a {
  font-size: 0.8rem;
  color: var(--color-neutral-500);
  text-decoration: none;
  transition: color 0.2s, text-decoration 0.2s;
}
.organizer-contact a:hover {
  color: var(--color-primary);
}

.important-dates {
  width: 100%;
  overflow-x: auto;
  margin-top: 1rem;
  flex-direction: row;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
  background: var(--color-white);
  padding: 0.5rem 1rem;
  border-left: 1px solid var(--color-primary);
}

.important-date-row {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  gap: rem;
}


/* Important Dates Table */
.important-dates {
  width: 100%;
  margin: 2rem auto 0 auto;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--color-white);
  box-shadow: 0 2px 8px rgba(76,25,232,0.06);
  overflow: hidden;
  font-size: 1.1rem;
}
.important-dates tr {
  width: 100%;
  border-bottom: 1px solid var(--color-neutral-200);
}
.important-dates tr:last-child {
  width: 100%;
  border-bottom: none;
}
.important-dates td {
  padding: 1rem 1.5rem;
  vertical-align: middle;
  text-align: left;
  color: var(--color-neutral-900);
}
.important-dates td:first-child {
  font-weight: bold;
  color: var(--color-primary);
  width: 120px;
  white-space: nowrap;
}
.important-dates td:last-child {
  color: var(--color-neutral-700);
  font-weight: 400;
}

@media (max-width: 991px) {
  
  .navbar-container {
    padding: 0;
  }
  .navbar-logo a {
    font-size: 1.2rem;
    padding: 6px 0;
  }
  #navbar {
    display: none;
    background: var(--color-neon-light);
  }
  #navbar.navbar-mobile {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    background: var(--color-neon-light);
    position: absolute;
    top: 100%;
    left: 0;
    width: 100vw;
    min-width: 220px;
    padding: 1rem 2rem;
    z-index: 1200;
  }
  .sticky-header {
    height: 80px;
  }
}

@media (max-width: 768px) {
  #navbar {
    display: none;
    background: var(--color-neon-light);
  }
  .navbar-container {
    padding: 0;
    width: 100%;
    justify-content: center;
  }
  .navbar-logo a {
    font-size: 1rem;
    padding: 4px 0;
  }
  /* Hide the NeurIPS logo on mobile to prevent blocking the mobile menu */
  .navbar-logo:last-child {
    display: none;
  }
  .bento-section {
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
    min-height: unset;
  }
  .bento-image {
    min-width: 0;
    width: 100%;
    min-height: 100px;
    margin-bottom: 1rem;
  }
  .section-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    width: 100%;
  }
  .section-header-component {
    padding-bottom: 2rem;
  }
  /* Make the navbar logo image smaller on mobile */
  .navbar-logo img {
    height: 36px !important;
    max-width: 80px !important;
  }
  /* Make the navbar title text smaller on mobile */
  .navbar-title {
    font-size: 1rem !important;
  }
  .navbar-title-group {
    justify-content: center;
  }
}

/* Shared section content width for all main content paragraphs */
.section-content {
  width: 100%;
  margin: 0 auto;
}

.organizer-role {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: #4c19e8;
  color: white;
  font-weight: 600;
  font-size: 0.75em;
  padding: 0.2em 0.5em;
  border-radius: 4px;
  z-index: 10;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.support-team-list {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 1rem;
}