/* ============================================
   VARIABLES & CONFIGURATION
   ============================================ */
:root {
  /* Couleurs principales */
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #8b5cf6;
  --accent: #ec4899;

  /* Dégradés */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

  /* Fond */
  --bg-dark: #0f172a;
  --bg-darker: #020617;
  --bg-light: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.5);

  /* Texte */
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  /* Effets */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

  /* Espacements */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ============================================
   RESET & BASE
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  background: linear-gradient(to bottom, var(--bg-darker), var(--bg-dark));
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

code, pre {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
}

a {
  text-decoration: none;
  color: var(--primary-light);
  transition: var(--transition-fast);
}

a:hover {
  color: var(--primary);
}

/* ============================================
   CONTAINER & SECTIONS
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: rgba(15, 23, 42, 0.3);
  backdrop-filter: blur(10px);
}

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

.section-title {
  margin-bottom: var(--spacing-sm);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.section-underline {
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  margin: 0 auto;
  border-radius: 2px;
}

.section-intro {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(99, 102, 241, 0.1);
  transition: var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(15, 23, 42, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.logo:hover {
  color: var(--primary-light);
}

.logo-bracket {
  color: var(--primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: var(--transition-fast);
  position: relative;
}

.nav-links a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: translateX(-50%);
  transition: var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::before {
  width: 80%;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--spacing-xl) var(--spacing-md);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 41, 59, 0.9) 100%);
}

.hero-content {
  text-align: center;
  z-index: 2;
  max-width: 800px;
  animation: fadeInUp 1s ease;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 50px;
  color: var(--primary-light);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
  animation: fadeIn 1s ease 0.2s backwards;
}

.hero-title {
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 1s ease 0.4s backwards;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease 0.6s backwards;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease 0.8s backwards;
}

.hero-decoration {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  overflow: hidden;
}

.floating-box {
  position: absolute;
  border-radius: 16px;
  background: var(--gradient-primary);
  opacity: 0.05;
  animation: float 20s infinite ease-in-out;
}

.box-1 {
  width: 300px;
  height: 300px;
  top: 10%;
  left: 5%;
  animation-delay: 0s;
}

.box-2 {
  width: 200px;
  height: 200px;
  top: 50%;
  right: 10%;
  animation-delay: 5s;
}

.box-3 {
  width: 250px;
  height: 250px;
  bottom: 10%;
  left: 50%;
  animation-delay: 10s;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: 12px;
  font-weight: 600;
  transition: var(--transition-normal);
  cursor: pointer;
  border: none;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-normal);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary-light);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: rgba(99, 102, 241, 0.2);
  transform: translateY(-2px);
}

.btn-download {
  background: rgba(139, 92, 246, 0.1);
  color: var(--secondary);
  border: 2px solid var(--secondary);
}

.btn-download:hover {
  background: rgba(139, 92, 246, 0.2);
  transform: translateY(-2px);
}

/* ============================================
   ABOUT CARDS
   ============================================ */
.about-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.about-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 16px;
  padding: var(--spacing-md);
  text-align: center;
  transition: var(--transition-normal);
}

.about-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.about-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.about-card h3 {
  color: var(--primary-light);
  margin-bottom: var(--spacing-xs);
}

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

/* ============================================
   TIMELINE
   ============================================ */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-primary);
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: var(--spacing-lg);
}

.timeline-dot {
  position: absolute;
  left: 11px;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gradient-primary);
  box-shadow: 0 0 0 4px var(--bg-dark), 0 0 0 6px var(--primary);
  z-index: 1;
}

.timeline-content {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 12px;
  padding: var(--spacing-md);
  transition: var(--transition-normal);
}

.timeline-content:hover {
  transform: translateX(8px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.timeline-date {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(99, 102, 241, 0.2);
  color: var(--primary-light);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.timeline-content h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.timeline-location {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-xs);
}

.timeline-content > p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ============================================
   SKILLS GRID
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.skill-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 16px;
  padding: var(--spacing-md);
  text-align: center;
  transition: var(--transition-normal);
  cursor: default;
}

.skill-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.skill-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
  display: block;
}

.skill-card h3 {
  color: var(--primary-light);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
}

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

/* ============================================
   PROJECTS GRID
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-md);
}

.project-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 16px;
  padding: var(--spacing-md);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.project-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.project-icon {
  font-size: 2.5rem;
}

.project-header h3 {
  color: var(--text-primary);
  font-size: 1.25rem;
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  flex-grow: 1;
}

.project-tags {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.tag {
  padding: 0.25rem 0.75rem;
  background: rgba(99, 102, 241, 0.2);
  color: var(--primary-light);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.project-link {
  color: var(--primary-light);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  transition: var(--transition-fast);
}

.project-link:hover {
  color: var(--primary);
  transform: translateX(4px);
}

/* ============================================
   VEILLE / RSS FEED
   ============================================ */
.veille-container {
  max-width: 900px;
  margin: 0 auto;
}

.rss-feed {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.feed-item {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 12px;
  padding: var(--spacing-md);
  transition: var(--transition-normal);
}

.feed-item:hover {
  transform: translateX(8px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.feed-item-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.feed-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(99, 102, 241, 0.2);
  color: var(--primary-light);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  width: fit-content;
}

.feed-title {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.1rem;
  transition: var(--transition-fast);
}

.feed-title:hover {
  color: var(--primary-light);
}

.feed-date {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.feed-loading,
.feed-error {
  text-align: center;
  padding: var(--spacing-md);
  color: var(--text-secondary);
}

/* ============================================
   CONTACT
   ============================================ */
.contact-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-info {
  margin-bottom: var(--spacing-lg);
}

.contact-item {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 16px;
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  transition: var(--transition-normal);
}

.contact-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  font-size: 3rem;
}

.contact-item h3 {
  color: var(--primary-light);
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.contact-link {
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
}

.contact-link:hover {
  color: var(--primary-light);
}

.contact-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(99, 102, 241, 0.2);
  padding: var(--spacing-lg) var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-social {
  margin-bottom: var(--spacing-md);
}

.footer-social h3 {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.75rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 12px;
  transition: var(--transition-normal);
}

.social-link:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.social-link img {
  width: 24px;
  height: 24px;
  filter: brightness(0) invert(1);
}

.social-link span {
  color: var(--text-primary);
  font-weight: 600;
}

.footer-bottom {
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(99, 102, 241, 0.1);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0.25rem 0;
}

.footer-tagline {
  color: var(--primary-light);
  font-weight: 600;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  33% {
    transform: translateY(-30px) rotate(5deg);
  }
  66% {
    transform: translateY(-15px) rotate(-5deg);
  }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    gap: var(--spacing-xs);
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: none;
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links a::before {
    display: none;
  }

  .hero {
    min-height: 90vh;
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
  }

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

  .timeline::before {
    left: 10px;
  }

  .timeline-item {
    padding-left: 40px;
  }

  .timeline-dot {
    left: 1px;
    width: 18px;
    height: 18px;
  }

  .social-links {
    flex-direction: column;
  }

  .social-link {
    justify-content: center;
  }

  .contact-actions {
    gap: var(--spacing-sm);
  }

  .floating-box {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .section {
    padding: var(--spacing-md) 0;
  }

  .hero-badge {
    font-size: 0.8rem;
    padding: 0.4rem 1rem;
  }

  .skill-card,
  .project-card,
  .about-card {
    padding: var(--spacing-sm);
  }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }