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

:root {
  --primary: #2c3e50;
  --secondary: #3498db;
  --text: #333;
  --text-light: #666;
  --bg: #fff;
  --bg-gray: #f8f9fa;
  --border: #e1e4e8;
}

[data-theme="dark"] {
  --primary: #93c5fd;
  --secondary: #60a5fa;
  --text: #e2e8f0;
  --text-light: #94a3b8;
  --bg: #0f172a;
  --bg-gray: #1e293b;
  --border: #334155;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

/* Navigation */
nav {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

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

.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

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

/* Hero Section */
.hero {
  padding: 6rem 2rem;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.hero .subtitle {
  font-size: 1.5rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

/* Buttons */
.btn,
.btn-small {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: var(--secondary);
  color: white;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  transition: transform 0.3s, box-shadow 0.3s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

.btn:hover,
.btn-small:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-alt {
  background: var(--bg-gray);
}

.page-content,
.project-detail {
  padding: 4rem 0;
}

h1 {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 2rem;
}

h2 {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 3rem;
  text-align: center;
}

h3 {
  font-size: 1.5rem;
  color: var(--primary);
  margin: 2rem 0 1rem;
}

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

.project-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.project-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 3rem;
}

.project-content {
  padding: 1.5rem;
}

.project-content h3 {
  color: var(--primary);
  margin: 0 0 0.5rem 0;
}

.project-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.project-detail h2 {
  margin-top: 4rem; /* Plus d'espace en haut */
  margin-bottom: 2rem;
}

.project-detail hr {
  margin: 3rem 0; /* Espace autour des lignes horizontales */
  border: none;
  height: 1px;
  background: var(--border);
}

.tag {
  padding: 0.25rem 0.75rem;
  background: var(--bg-gray);
  color: var(--text-light);
  border-radius: 20px;
  font-size: 0.875rem;
}

.project-meta {
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--bg-gray);
  border-radius: 4px;
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: start;
  margin-top: 2rem;
}

.about-image {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 4rem;
}

.about-content p {
  margin-bottom: 1.5rem;
}

.skills-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.skill-item {
  padding: 1rem;
  background: var(--bg-gray);
  border-radius: 4px;
  border-left: 3px solid var(--secondary);
}

/* Contact Form */
.contact-content {
  max-width: 600px;
  margin: 2rem auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--primary);
  font-weight: 600;
}

input,
textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
}

textarea {
  resize: vertical;
  min-height: 150px;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--secondary);
}

/* Footer */
footer {
  background: var(--primary);
  color: white;
  text-align: center;
  padding: 2rem;
}

.social-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.social-links a {
  color: white;
  text-decoration: none;
  transition: opacity 0.3s;
}

.social-links a:hover {
  opacity: 0.8;
}

/* Dark mode overrides */
[data-theme="dark"] body {
  background: var(--bg);
}

[data-theme="dark"] nav {
  background: #0f172a;
  border-bottom-color: var(--border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] footer {
  background: #020617;
}

[data-theme="dark"] input,
[data-theme="dark"] textarea {
  background: var(--bg-gray);
  color: var(--text);
  border-color: var(--border);
}

[data-theme="dark"] .project-card {
  background: var(--bg-gray);
}

[data-theme="dark"] .project-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* Bouton toggle dark mode */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  transition: background 0.2s, border-color 0.2s;
  margin-left: 1rem;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--bg-gray);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero .subtitle {
    font-size: 1.2rem;
  }

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

  .skills-list {
    grid-template-columns: 1fr;
  }

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

  .nav-container {
    padding: 1rem;
  }
}

/* ============================================
   PAGE À PROPOS - STYLES SPÉCIFIQUES
   ============================================ */

.page-content {
  padding: 4rem 0;
}

.page-content h1 {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 3rem;
  text-align: left;
}

.page-content h2 {
  font-size: 2rem;
  color: var(--primary);
  margin: 3rem 0 1.5rem;
  text-align: center;
}

.page-content h3 {
  font-size: 1.5rem;
  color: var(--primary);
  margin: 2rem 0 1rem;
}

.page-content h4 {
  font-size: 1.2rem;
  color: var(--text);
  margin: 1.5rem 0 0.5rem;
}

/* Grid 2 colonnes pour About */
.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 3rem;
  margin: 3rem 0;
  align-items: start;
}

/* Photo de profil */
.profile-image {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 5rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 100px;
}

/* Contenu texte à côté de la photo */
.about-text {
  flex: 1;
}

.about-text p {
  margin-bottom: 1.5rem;
  line-height: 1.8;
  color: var(--text);
}

/* Section avec icône emoji */
.section-icon {
  font-size: 1.5rem;
  margin-right: 0.5rem;
}

/* Cards de compétences en grille */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.skill-card {
  padding: 1.5rem;
  background: var(--bg-gray);
  border-radius: 8px;
  border-left: 4px solid var(--secondary);
  transition: transform 0.3s, box-shadow 0.3s;
}

.skill-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.skill-card strong {
  display: block;
  color: var(--primary);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

/* Liste avec puces personnalisées */
.custom-list {
  list-style: none;
  padding: 0;
}

.custom-list li {
  padding: 0.75rem 0;
  padding-left: 2rem;
  position: relative;
  line-height: 1.6;
}

.custom-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--secondary);
  font-weight: bold;
  font-size: 1.2rem;
}

/* Timeline pour l'expérience */
.timeline-item {
  position: relative;
  padding-left: 2rem;
  padding-bottom: 2rem;
  border-left: 2px solid var(--border);
  margin-left: 1rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 0;
  width: 12px;
  height: 12px;
  background: var(--secondary);
  border-radius: 50%;
}

.timeline-item:last-child {
  border-left: 2px solid transparent;
}

.timeline-date {
  font-style: italic;
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Citation stylisée */
blockquote {
  border-left: 4px solid var(--secondary);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  background: var(--bg-gray);
  font-style: italic;
  color: var(--text-light);
  border-radius: 4px;
}

/* Tags/Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--secondary);
  color: white;
  border-radius: 20px;
  font-size: 0.875rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

/* Section highlight */
.highlight-box {
  background: linear-gradient(
    135deg,
    rgba(52, 152, 219, 0.1),
    rgba(44, 62, 80, 0.1)
  );
  padding: 2rem;
  border-radius: 8px;
  margin: 2rem 0;
  border: 1px solid var(--border);
}

/* Responsive About page */
@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .profile-image {
    max-width: 200px;
    margin: 0 auto;
    position: static;
  }

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

/* ============================================
   PAGE PROJET DÉTAIL — HERO & MISE EN PAGE
   ============================================ */

.project-hero {
  background: linear-gradient(135deg, var(--primary) 0%, #1a252f 55%, var(--secondary) 100%);
  color: white;
  padding: 4rem 0 3rem;
  text-align: center;
}

.project-back-link {
  display: inline-block;
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  font-size: 0.95rem;
  margin-bottom: 2rem;
  transition: color 0.2s;
}

.project-back-link:hover {
  color: white;
}

.project-hero-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.25));
}

.project-hero-title {
  font-size: 2.5rem;
  color: white;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.project-hero-tags {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.tag-badge {
  padding: 0.4rem 1rem;
  background: rgba(255, 255, 255, 0.18);
  color: white;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Barre d'infos (tech + boutons) */
.project-info-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  background: var(--bg-gray);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.75rem;
  margin: 2.5rem 0 3rem;
}

.project-info-tech {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  color: var(--text);
}

.info-label {
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
}

.project-info-links {
  display: flex;
  gap: 0.75rem;
  flex-shrink: 0;
}

.btn-outline {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  border: 2px solid var(--secondary);
  color: var(--secondary);
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s, color 0.2s;
}

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

/* Corps du contenu projet */
.project-body h2 {
  font-size: 1.6rem;
  color: var(--primary);
  margin: 3rem 0 1.25rem;
  padding-bottom: 0.6rem;
  border-bottom: 3px solid var(--secondary);
  text-align: left;
}

.project-body h3 {
  font-size: 1.2rem;
  color: var(--secondary);
  margin: 1.75rem 0 0.75rem;
}

.project-body p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.project-body ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
}

.project-body ul li {
  position: relative;
  padding: 0.55rem 0 0.55rem 1.75rem;
  color: var(--text);
  line-height: 1.6;
  border-bottom: 1px solid var(--border);
}

.project-body ul li:last-child {
  border-bottom: none;
}

.project-body ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--secondary);
  font-weight: bold;
}

.project-body ul li strong {
  color: var(--primary);
}

/* Responsive projet */
@media (max-width: 640px) {
  .project-hero-title {
    font-size: 1.75rem;
  }

  .project-info-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .project-info-links {
    width: 100%;
  }
}