@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");

:root {
  /* Light mode - Rose/Pink theme */
  --bg-primary: #ffffff;
  --bg-secondary: #fef2f4;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --accent-primary: #e91e63;
  --accent-secondary: #f06292;
  --accent-tertiary: #f8bbd0;
  --border-color: #fce4ec;
  --shadow: rgba(233, 30, 99, 0.1);
}

[data-theme="dark"] {
  /* Dark mode - Violet theme */
  --bg-primary: #1a1a1a;
  --bg-secondary: #2a2a2a;
  --text-primary: #f5f5f5;
  --text-secondary: #b0b0b0;
  --accent-primary: #9c27b0;
  --accent-secondary: #ba68c8;
  --accent-tertiary: #ce93d8;
  --border-color: #3a3a3a;
  --shadow: rgba(156, 39, 176, 0.2);
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header Navigation */
header {
  position: sticky;
  top: 0;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 2rem;
  z-index: 100;
  transition: background-color 0.3s ease;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-primary);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-primary);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  border-color: var(--accent-primary);
  transform: rotate(180deg);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: var(--accent-primary);
}

/* Main Container */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* Hero Section */
.hero {
  padding: 4rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero .subtitle {
  font-size: 1.5rem;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  background-color: var(--accent-primary);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn:hover {
  background-color: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--shadow);
}

.btn-secondary {
  background-color: transparent;
  border: 2px solid var(--accent-primary);
  color: var(--accent-primary);
}

.btn-secondary:hover {
  background-color: var(--accent-primary);
  color: white;
}

/* Navigation Cards */
.nav-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.nav-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  text-decoration: none;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.nav-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px var(--shadow);
  border-color: var(--accent-primary);
}

.nav-card-icon {
  width: 60px;
  height: 60px;
  background-color: var(--accent-tertiary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.nav-card-icon svg {
  width: 32px;
  height: 32px;
  fill: var(--accent-primary);
}

.nav-card h3 {
  color: var(--text-primary);
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.nav-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Content Sections */
.section {
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 60px;
  height: 4px;
  background-color: var(--accent-primary);
  border-radius: 2px;
}

.section-content {
  margin-top: 2rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
}

/* Info Box */
.info-box {
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--accent-primary);
  padding: 1.5rem;
  border-radius: 8px;
  margin: 2rem 0;
}

.info-box h3 {
  color: var(--accent-primary);
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.info-box p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

/* Project Cards */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.3s ease;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px var(--shadow);
}

.project-card h3 {
  color: var(--text-primary);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.project-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tag {
  background-color: var(--accent-tertiary);
  color: var(--accent-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* Organigramme */
.organigramme {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin: 2rem 0;
}

.org-level {
  margin-bottom: 2rem;
  text-align: center;
}

.org-box {
  display: inline-block;
  background-color: var(--bg-primary);
  border: 2px solid var(--accent-primary);
  border-radius: 8px;
  padding: 1rem 2rem;
  margin: 0.5rem;
}

.org-box h4 {
  color: var(--accent-primary);
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.org-box p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Embedded Content */
.embed-container {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin: 2rem 0;
}

.embed-container iframe {
  width: 100%;
  min-height: 600px;
  border: none;
  border-radius: 8px;
}

/* Footer */
footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem;
  text-align: center;
  margin-top: 4rem;
}

footer p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .hero .subtitle {
    font-size: 1.25rem;
  }

  .nav-links {
    gap: 1rem;
  }

  .nav-cards {
    grid-template-columns: 1fr;
  }

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

  main {
    padding: 2rem 1rem;
  }

  header {
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .nav-links {
    flex-direction: column;
    gap: 0.5rem;
  }

  .hero h1 {
    font-size: 2rem;
  }
}