/* ============================================
   VARIABLES CSS - THÈME CLAIR/SOMBRE
   ============================================ */
:root {
  --transition: 0.3s ease;
}

/* THÈME CLAIR (par défaut) */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;

  --accent: #14b8a6;
  --accent-hover: #0d9488;
  --accent-light: #ccfbf1;
  --gradient-start: #14b8a6;
  --gradient-end: #0891b2;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

/* THÈME SOMBRE */
[data-theme="dark"] {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --border-hover: #475569;

  --accent: #2dd4bf;
  --accent-hover: #5eead4;
  --accent-light: #134e4a;
  --gradient-start: #14b8a6;
  --gradient-end: #0891b2;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
}

/* ============================================
   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;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition), color var(--transition);
}

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

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1.0625rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

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

strong {
  color: var(--accent);
  font-weight: 600;
}

ul {
  list-style-position: inside;
  color: var(--text-secondary);
}

ul li {
  margin-bottom: 0.5rem;
  padding-left: 1rem;
}

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

.section {
  padding: 5rem 0;
  position: relative;
}

/* ============================================
   HEADER / TOPBAR
   ============================================ */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition);
}

[data-theme="dark"] .topbar {
  background: rgba(10, 14, 26, 0.8);
}

.topbar .nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  gap: 2rem;
  position: relative;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform var(--transition);
}

.logo:hover {
  transform: scale(1.05);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  transition: width var(--transition);
}

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

.nav-links a:hover::after {
  width: 70%;
}

/* Pas besoin du système court/long en mode hamburger */
.nav-short {
  display: none;
}

/* Language Switcher */
.language-switcher {
  display: flex;
  gap: 0.5rem;
}

.lang-btn {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.lang-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 80px;
  position: relative;
  background:
    radial-gradient(circle at 20% 50%, rgba(20, 184, 166, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(8, 145, 178, 0.05) 0%, transparent 50%);
}

.hero-inner {
  max-width: 900px;
  text-align: center;
}

.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  display: block;
  font-size: 0.6em;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.hero-socials {
  display: flex;
  gap: 1rem;
  justify-content: center;
  align-items: center;
  color: var(--text-muted);
}

.hero-socials a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition);
}

.hero-socials a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-weight: 600;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-neutral {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: white;
  box-shadow: var(--shadow-md);
}

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

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-title {
  position: relative;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  border-radius: 2px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-bottom: 3rem;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-grid {
  display: grid;
  gap: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
}

.about-grid:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-section {
  background: var(--bg-secondary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.03), rgba(8, 145, 178, 0.03));
  opacity: 0;
  transition: opacity var(--transition);
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent);
}

.skill-card:hover::before {
  opacity: 1;
}

.skill-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.skill-icon {
  font-size: 2rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border-radius: 0.75rem;
}

.skill-title {
  font-size: 1.25rem;
  margin: 0;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-pill {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: rgba(20, 184, 166, 0.1);
  border: 1px solid rgba(20, 184, 166, 0.3);
  border-radius: 2rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
  cursor: default;
  backdrop-filter: blur(8px);
}

.tag-pill small {
  font-size: 0.75rem;
  opacity: 0.8;
  font-weight: 600;
}

/* Niveaux de compétences - Système 5 étoiles */

/* Niveau 5/5 - Notions complètes - Vert très très foncé */
.tag-pill[data-level="5"] {
  background: rgba(4, 120, 87, 0.2);
  border-color: rgba(4, 120, 87, 0.5);
}

.tag-pill[data-level="5"] small {
  color: #047857;
  font-weight: 700;
}

/* Niveau 4/5 - Autonomie - Vert très foncé */
.tag-pill[data-level="4"] {
  background: rgba(5, 150, 105, 0.18);
  border-color: rgba(5, 150, 105, 0.45);
}

.tag-pill[data-level="4"] small {
  color: #059669;
  font-weight: 700;
}

/* Niveau 3/5 - Autonomie partielle - Vert moyen */
.tag-pill[data-level="3"] {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.4);
}

.tag-pill[data-level="3"] small {
  color: #10b981;
  font-weight: 600;
}

/* Niveau 2/5 - Notions de base - Orange */
.tag-pill[data-level="2"] {
  background: rgba(249, 115, 22, 0.15);
  border-color: rgba(249, 115, 22, 0.4);
}

.tag-pill[data-level="2"] small {
  color: #f97316;
  font-weight: 600;
}

/* Niveau 1/5 - En progrès - Orange clair */
.tag-pill[data-level="1"] {
  background: rgba(251, 146, 60, 0.15);
  border-color: rgba(251, 146, 60, 0.38);
}

.tag-pill[data-level="1"] small {
  color: #fb923c;
  font-weight: 600;
}

/* Hovers pour chaque niveau */
.tag-pill:hover {
  transform: translateY(-2px);
}

.tag-pill[data-level="5"]:hover {
  background: rgba(4, 120, 87, 0.3);
  border-color: #047857;
  box-shadow: 0 4px 12px rgba(4, 120, 87, 0.4);
}

.tag-pill[data-level="4"]:hover {
  background: rgba(5, 150, 105, 0.28);
  border-color: #059669;
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.35);
}

.tag-pill[data-level="3"]:hover {
  background: rgba(16, 185, 129, 0.25);
  border-color: #10b981;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.tag-pill[data-level="2"]:hover {
  background: rgba(249, 115, 22, 0.25);
  border-color: #f97316;
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.35);
}

.tag-pill[data-level="1"]:hover {
  background: rgba(251, 146, 60, 0.25);
  border-color: #fb923c;
  box-shadow: 0 4px 12px rgba(251, 146, 60, 0.3);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.03), rgba(8, 145, 178, 0.03));
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent);
}

.card:hover::before {
  opacity: 1;
}

.project-card h3 {
  font-size: 1.375rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.project-card p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.project-card[data-github] {
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.project-card[data-github]:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  font-weight: 600;
  transition: all var(--transition);
}

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

/* ============================================
   EXPERIENCE SECTION (TIMELINE)
   ============================================ */
.timeline {
  position: relative;
  padding-left: 0;
  max-width: 1100px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 140px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--gradient-start), var(--gradient-end));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 180px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 130px;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  border: 4px solid var(--bg-primary);
  box-shadow: 0 0 0 4px var(--accent), 0 0 20px rgba(37, 99, 235, 0.4);
  animation: pulse-timeline 2s ease-in-out infinite;
}

@keyframes pulse-timeline {
  0%, 100% {
    box-shadow: 0 0 0 4px var(--accent), 0 0 20px rgba(20, 184, 166, 0.4);
  }
  50% {
    box-shadow: 0 0 0 4px var(--accent), 0 0 30px rgba(20, 184, 166, 0.6);
  }
}

.timeline-year {
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 700;
  color: var(--accent);
  font-size: 1.25rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  width: 120px;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2.5rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.timeline-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--gradient-start), var(--gradient-end));
  opacity: 0;
  transition: opacity var(--transition);
}

.timeline-card:hover {
  box-shadow: var(--shadow-xl);
  border-color: var(--accent);
  transform: translateX(8px);
}

.timeline-card:hover::before {
  opacity: 1;
}

.timeline-card h3 {
  margin-bottom: 0.5rem;
}

.timeline-location {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.timeline-card ul {
  margin: 1rem 0;
}

/* ============================================
   COMPÉTENCES PROFESSIONNELLES SECTION
   ============================================ */
.pro-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: 2rem;
}

.pro-skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.pro-skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--gradient-start), var(--gradient-end));
  opacity: 0;
  transition: opacity var(--transition);
}

.pro-skill-card:hover {
  box-shadow: var(--shadow-xl);
  border-color: var(--accent);
  transform: translateY(-4px);
}

.pro-skill-card:hover::before {
  opacity: 1;
}

.pro-skill-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border-color);
}

.pro-skill-icon {
  font-size: 2.5rem;
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border-radius: 0.75rem;
  flex-shrink: 0;
}

.pro-skill-header > div {
  flex: 1;
}

.pro-skill-header h3 {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.pro-badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  border-radius: 2rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pro-badge-autonome {
  background: rgba(5, 150, 105, 0.15);
  color: #059669;
  border: 1px solid rgba(5, 150, 105, 0.4);
}

.pro-badge-progression {
  background: rgba(249, 115, 22, 0.15);
  color: #f97316;
  border: 1px solid rgba(249, 115, 22, 0.4);
}

.pro-skill-content h4 {
  font-size: 1rem;
  color: var(--accent);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.pro-skill-content h4:first-child {
  margin-top: 0;
}

.pro-skill-content ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 1rem;
}

.pro-skill-content ul li {
  padding-left: 1.5rem;
  margin-bottom: 0.6rem;
  position: relative;
  color: var(--text-secondary);
  line-height: 1.6;
}

.pro-skill-content ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

.pro-evaluation {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent);
  border-radius: 0.5rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.pro-evaluation strong {
  color: var(--accent);
  font-weight: 600;
}

/* Responsive */
@media (max-width: 1024px) {
  .pro-skills-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .pro-skill-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .pro-skill-icon {
    width: 60px;
    height: 60px;
    font-size: 2rem;
  }

  .pro-skill-content h4 {
    font-size: 0.9rem;
  }

  .pro-evaluation {
    padding: 1rem;
    font-size: 0.9rem;
  }
}

/* ============================================
   EDUCATION SECTION
   ============================================ */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  transition: all var(--transition);
}

.edu-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
  transform: translateY(-4px);
}

.edu-card h3 {
  margin-bottom: 0.5rem;
}

.edu-school {
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.edu-dates {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.edu-extra {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.edu-extra > div {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  transition: all var(--transition);
}

.contact-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
  transform: translateY(-4px);
}

.contact-card h3 {
  margin-bottom: 1.5rem;
}

.contact-card p {
  margin-bottom: 0.75rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
}

/* ============================================
   THEME TOGGLE BUTTON
   ============================================ */
.theme-toggle {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  transform: scale(1.1) rotate(20deg);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent);
}

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

.section {
  animation: fadeInUp 0.6s ease-out;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .timeline {
    padding-left: 0;
  }
  
  .timeline::before {
    left: 0;
  }
  
  .timeline-item {
    padding-left: 40px;
  }
  
  .timeline-item::before {
    left: -10px;
  }
  
  .timeline-year {
    position: static;
    margin-bottom: 0.75rem;
    display: block;
    width: auto;
  }
}

/* ============================================
   MOBILE MENU HAMBURGER
   ============================================ */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Menu mobile pour tablettes aussi - activé plus tôt */
@media (max-width: 1300px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: auto;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    max-height: 80vh;
    overflow-y: auto;
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    padding: 1rem 2rem;
    border-radius: 0;
    border-bottom: 1px solid var(--border-color);
    width: 100%;
    text-align: left;
  }

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

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

  .topbar .nav {
    padding: 1rem 1.5rem;
  }

  /* Masquer les textes longs en mode hamburger */
  .nav-links .nav-short,
  .nav-links .nav-full {
    display: inline;
  }

  /* Garder les boutons de langue visibles et fixes */
  .language-switcher {
    display: flex;
    gap: 0.5rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.5rem;
  }

  .section {
    padding: 3rem 0;
  }
  
  .hero {
    padding-top: 100px;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .skills-grid,
  .projects-grid,
  .edu-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .about-grid {
    padding: 1.5rem;
  }
  
  .timeline {
    padding-left: 1.5rem;
  }
  
  .timeline-item::before {
    left: -2rem;
  }
  
  /* Ajuster le sélecteur de langue sur mobile */
  .language-selector {
    top: 70px !important;
    right: 10px !important;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 1rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .theme-toggle {
    width: 50px;
    height: 50px;
    bottom: 1.5rem;
    right: 1.5rem;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .topbar,
  .theme-toggle,
  .hero-actions {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .section {
    page-break-inside: avoid;
  }
}