/* Reset et variables CSS */
:root {
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --accent-color: #e74c3c;
  --text-dark: #2c3e50;
  --text-light: #7f8c8d;
  --bg-light: #ffffff;
  --bg-section: #f8f9fa;
  --border-color: #e9ecef;
  --shadow-light: 0 2px 10px rgba(0,0,0,0.1);
  --shadow-medium: 0 5px 25px rgba(0,0,0,0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', 'Segoe UI', 'Helvetica Neue', sans-serif;
  color: var(--text-dark);
  background: var(--bg-light);
  line-height: 1.7;
  font-size: 16px;
  scroll-behavior: smooth;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: var(--bg-light);
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

header .container {
  display: flex;
  justify-content: center;
  align-items: center;
}

nav {
  display: flex;
  gap: 30px;
}

nav a {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 500;
  font-size: 16px;
  padding: 10px 20px;
  border-radius: 25px;
  transition: var(--transition);
  position: relative;
}

nav a:hover {
  color: var(--secondary-color);
  background: var(--bg-section);
  transform: translateY(-2px);
}

nav a.active {
  background: var(--secondary-color);
  color: white;
}

/* Responsive navigation */
@media (max-width: 768px) {
  nav {
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
  }
  
  nav a {
    padding: 8px 16px;
    font-size: 14px;
  }
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  text-align: center;
  padding: 120px 20px 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../../assets/images/pp_b.png') center/cover no-repeat;
  opacity: 0.3;
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
  animation: fadeInUp 1s ease-out;
}

.hero p {
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  margin-bottom: 30px;
  opacity: 0.95;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s ease-out 0.3s both;
  transition: var(--transition);
}

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

/* Sections */
.section {
  padding: 80px 0;
  transition: var(--transition);
}

.section:nth-child(even) {
  background: var(--bg-section);
}

.section h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 40px;
  color: var(--primary-color);
  font-weight: 700;
  text-align: center;
  position: relative;
}

.section h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
  border-radius: 2px;
}

.section p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 20px;
  color: var(--text-light);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Skills Grid */
.services {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
  margin-top: 50px;
}

.services a {
  display: block;
  background: var(--bg-light);
  padding: 30px 25px;
  border: 2px solid var(--border-color);
  border-radius: 15px;
  text-decoration: none;
  color: var(--text-dark);
  transition: var(--transition);
  box-shadow: var(--shadow-light);
  position: relative;
  overflow: hidden;
}

.services a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
  transition: var(--transition);
}

.services a:hover::before {
  left: 100%;
}

.services a:hover {
  transform: translateY(-8px);
  border-color: var(--secondary-color);
  box-shadow: var(--shadow-medium);
  color: var(--primary-color);
}

.services li {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
}

/* Contact Section */
#contact {
  background: var(--primary-color);
  color: white;
}

#contact h2 {
  color: white;
}

#contact h2::after {
  background: var(--secondary-color);
}

#contact p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.2rem;
}

#contact a {
  color: var(--secondary-color);
  transition: var(--transition);
}

#contact a:hover {
  color: white;
  text-decoration: none;
}

/* Footer */
footer {
  background: var(--text-dark);
  color: rgba(255, 255, 255, 0.8);
  text-align: center;
  padding: 30px 0;
  font-size: 0.95rem;
  border-top: 3px solid var(--secondary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero {
    padding: 80px 20px 60px;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .services {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .services a {
    padding: 25px 20px;
  }
  
  .container {
    padding: 0 15px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 60px 15px 40px;
  }
  
  .section {
    padding: 40px 0;
  }
  
  .services a {
    padding: 20px 15px;
  }
}

/* Scroll animations */
@media (prefers-reduced-motion: no-preference) {
  .section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
  }
  
  .section.visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Focus styles for accessibility */
a:focus, button:focus {
  outline: 2px solid var(--secondary-color);
  outline-offset: 2px;
}

/* Loading animation */
.loading {
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

/* Enhanced button styles */
.btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--secondary-color);
  color: white;
  text-decoration: none;
  border-radius: 25px;
  font-weight: 500;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

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

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

/* Improved typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.5em;
}

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

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Print styles */
@media print {
  .header, .footer {
    position: static;
  }
  
  .hero {
    background: none !important;
    color: var(--text-dark) !important;
  }
  
  .section {
    page-break-inside: avoid;
  }
  
  a[href]:after {
    content: " (" attr(href) ")";
  }
}

/* Navigation highlight (factorisation des styles répétés) */
.nav-highlight {
  background: linear-gradient(135deg, #ef4444, #dc2626) !important;
  color: white !important;
  padding: 8px 16px !important;
  border-radius: 20px !important;
  font-weight: 600 !important;
  animation: pulse 2s infinite !important;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}