/* SIGGRAPH 2026 Theme for PRICE Workshop */

:root {
  --primary: #55686e;
  --secondary: #D2C5B2;
  --accent: #2A4249;
  --dark-bg: #F1EFE3;
  --dark-alt: #E9E4DB;
  --light-text: #2A4249;
  --gray-text: #55686e;
  --border-color: #d9d7ce;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--dark-bg);
  color: var(--light-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  font-size: 16px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--light-text);
}

h1 {
  font-size: 3rem;
  color: var(--light-text);
}

h2 {
  font-size: 2rem;
  color: var(--primary);
  margin-top: 2rem;
  border-bottom: 2px solid var(--secondary);
  padding-bottom: 0.5rem;
}

h3 {
  font-size: 1.5rem;
  color: var(--accent);
}

p {
  margin-bottom: 1rem;
  color: var(--gray-text);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

a:hover {
  color: var(--accent);
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

/* Navigation */
nav {
  background-color: var(--dark-alt);
  border-bottom: 2px solid var(--primary);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.1);
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  color: var(--light-text);
  font-weight: 500;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width 0.3s ease;
}

.nav-menu a:hover::after {
  width: 100%;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Hero Section */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 2rem;
  padding: 1.5rem 0;
  min-height: 50vh;
}

.hero-content h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.hero-content p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8rem;
  opacity: 0.8;
}

.cta-button {
  display: inline-block;
  background: var(--primary);
  color: var(--dark-bg);
  padding: 0.75rem 2rem;
  border-radius: 5px;
  font-weight: 700;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

/* Main Content Areas */
main {
  padding: 2rem 0;
  min-height: calc(100vh - 200px);
}

.content-section {
  margin-bottom: 2rem;
}

/* Lists */
ul, ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.5rem;
  color: var(--gray-text);
}

/* Code and Pre */
code {
  background-color: var(--dark-alt);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: "Courier New", monospace;
  color: var(--primary);
}

pre {
  background-color: var(--dark-alt);
  padding: 1rem;
  border-radius: 5px;
  overflow-x: auto;
  margin-bottom: 1rem;
  border-left: 4px solid var(--primary);
}

/* Boxes and Cards */
.card {
  background-color: var(--dark-alt);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.card h3 {
  color: var(--secondary);
  margin-bottom: 1rem;
}

/* Schedule Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}

thead {
  background-color: var(--dark-alt);
  border-bottom: 3px solid var(--primary);
}

th {
  padding: 1rem;
  text-align: left;
  color: var(--primary);
  font-weight: 700;
}

td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--gray-text);
}

tr:hover {
  background-color: rgba(0, 212, 255, 0.05);
}

/* Organizers Grid */
.organizers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.organizer-card {
  background-color: var(--dark-alt);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
}

.organizer-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(255, 183, 3, 0.2);
}

.organizer-card h3 {
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.organizer-title {
  color: var(--primary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.organizer-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 1rem 0 0.5rem 0;
}

.organizer-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 0.5rem;
  color: var(--light-text);
  transition: all 0.2s ease;
  text-decoration: none;
}

.organizer-links a:hover {
  color: var(--accent);
  transform: scale(1.15);
}

/* Topics Grid */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.topic-box {
  background-color: var(--dark-alt);
  border-left: 4px solid var(--primary);
  border-radius: 5px;
  padding: 1.5rem;
  transition: all 0.3s ease;
}

.topic-box:hover {
  border-left-color: var(--accent);
  box-shadow: 0 5px 20px rgba(255, 183, 3, 0.2);
}

.topic-box h4 {
  color: var(--secondary);
  margin-bottom: 0.75rem;
}

.topic-box ul {
  margin-left: 1.5rem;
}

/* Category Cards Grid (SIGGRAPH-inspired) */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}

.category-card {
  background: linear-gradient(135deg, var(--dark-alt) 0%, rgba(85, 104, 110, 0.08) 100%);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem 0.8rem;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.category-card:hover {
  border-color: var(--primary);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
  transform: translateY(-5px);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.category-icon {
  font-size: 2.5rem;
  margin-bottom: 0.4rem;
  display: inline-block;
}

.category-card h3 {
  color: var(--primary);
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.category-card p {
  font-size: 0.9rem;
  color: var(--gray-text);
  line-height: 1.4;
}

/* Deadline Tracking Cards */
.deadlines-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.deadline-card {
  background-color: var(--dark-alt);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
}

.deadline-card::left {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 8px 0 0 8px;
}

.deadline-card:hover {
  border-color: var(--primary);
  box-shadow: 0 5px 25px rgba(0, 212, 255, 0.2);
  transform: translateY(-3px);
}

.deadline-type {
  font-size: 0.85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.deadline-title {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.deadline-date {
  color: var(--light-text);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.deadline-status {
  font-size: 0.9rem;
  color: var(--gray-text);
  padding: 0.5rem;
  background-color: rgba(0, 212, 255, 0.1);
  border-radius: 4px;
  margin-top: 0.75rem;
}

.deadline-status.open {
  background-color: rgba(0, 212, 255, 0.15);
  color: var(--primary);
}

.deadline-status.upcoming {
  background-color: rgba(255, 183, 3, 0.15);
  color: var(--accent);
}

.deadline-status.closed {
  background-color: rgba(255, 0, 110, 0.15);
  color: var(--secondary);
}

/* CTA Button Variations */
.cta-buttons-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}

.cta-button-secondary {
  display: inline-block;
  background: transparent;
  color: var(--primary);
  padding: 0.75rem 2rem;
  border: 2px solid var(--primary);
  border-radius: 5px;
  font-weight: 700;
  transition: all 0.3s ease;
  cursor: pointer;
  font-size: 1rem;
}

.cta-button-secondary:hover {
  background: var(--primary);
  color: var(--dark-bg);
  box-shadow: 0 5px 20px rgba(0, 212, 255, 0.3);
  transform: translateY(-2px);
}

.cta-button-accent {
  display: inline-block;
  background: var(--accent);
  color: var(--dark-bg);
  padding: 0.75rem 2rem;
  border-radius: 5px;
  font-weight: 700;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.cta-button-accent:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(255, 183, 3, 0.3);
}

/* Center CTA Section */
.cta-section {
  text-align: center;
  padding: 3rem 2rem;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(255, 0, 110, 0.05));
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin: 2rem 0;
}

.cta-section h2 {
  margin-top: 0;
  font-size: 1.75rem;
}

.cta-section p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

/* Footer */
footer {
  background-color: var(--dark-alt);
  border-top: 2px solid var(--secondary);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
  color: var(--gray-text);
}

footer p {
  margin-bottom: 0.5rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .categories-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 2rem 0;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .nav-menu {
    gap: 1rem;
    font-size: 0.9rem;
  }

  .container {
    padding: 0 1rem;
  }

  .organizers-grid {
    grid-template-columns: 1fr;
  }

  .topics-grid {
    grid-template-columns: 1fr;
  }

  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .deadlines-grid {
    grid-template-columns: 1fr;
  }

  .cta-buttons-group {
    flex-direction: column;
  }

  .cta-button,
  .cta-button-secondary,
  .cta-button-accent {
    width: 100%;
    text-align: center;
  }

  table {
    font-size: 0.9rem;
  }

  th, td {
    padding: 0.5rem;
  }

  .cta-section {
    padding: 2rem 1rem;
  }

  .cta-section h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .nav-menu {
    flex-direction: column;
    gap: 0.5rem;
  }

  .hero-visual {
    font-size: 4rem;
  }

  .cta-button {
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
  }

  .categories-grid {
    grid-template-columns: 1fr;
  }

  .category-card {
    padding: 1.5rem 1rem;
  }

  .category-icon {
    font-size: 2rem;
  }

  .deadline-card {
    padding: 1rem;
  }

  .cta-section {
    border-radius: 6px;
  }

  .deadline-date {
    font-size: 1.1rem;
  }
}