/* styles.css - Design graphique monochrome amélioré pour Collapart2 */

/* Variables CSS pour un design cohérent */
:root {
  --primary-color: #000000;
  --secondary-color: #333333;
  --accent-color: #666666;
  --light-color: #f5f5f5;
  --dark-color: #000000;
  --border-radius: 12px;
  --box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --gradient-start: #000000;
  --gradient-end: #333333;
}

/* Réinitialisation et base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--dark-color);
  background: linear-gradient(135deg, #ffffff 0%, #f8f8f8 100%);
  padding: 0;
  margin: 0;
  min-height: 100vh;
}

/* En-tête */
header {
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
  color: white;
  padding: 1.5rem 0;
  box-shadow: var(--box-shadow);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.logo {
  font-size: 2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: -0.5px;
}

.logo-icon {
  font-size: 2.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: var(--transition);
}

.logo:hover .logo-icon {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-left: auto;
}

.nav-links a {
  color: white;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
  font-weight: 600;
  position: relative;
  overflow: hidden;
}

.nav-links a:before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.5);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

.nav-links a:hover:before {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

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

/* Titres */
h1, h2, h3, h4 {
  margin-bottom: 1.25rem;
  color: var(--primary-color);
  font-weight: 700;
  position: relative;
}

h1 {
  font-size: 2.8rem;
  text-align: center;
  margin-bottom: 2.5rem;
  position: relative;
  padding-bottom: 1.5rem;
  letter-spacing: -0.5px;
}

h1:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 5px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

h2 {
  font-size: 2.2rem;
  position: relative;
  padding-left: 2rem;
  margin-top: 2.5rem;
  margin-bottom: 1.5rem;
}

h2:before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
}

h3 {
  font-size: 1.6rem;
  color: var(--secondary-color);
}

/* Boutons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  text-align: center;
  box-shadow: var(--box-shadow);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 20px rgba(0, 0, 0, 0.25);
  background: linear-gradient(135deg, var(--gradient-end) 0%, var(--gradient-start) 100%);
}

.btn:active {
  transform: translateY(0);
}

.btn-secondary {
  background: white;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.btn-block {
  display: block;
  width: 100%;
}

/* Formulaires */
.form-container {
  background: white;
  padding: 2.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin-bottom: 2.5rem;
  border: 1px solid #e0e0e0;
  position: relative;
  overflow: hidden;
}

.form-container:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
}

.form-group {
  margin-bottom: 2rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 600;
  color: var(--secondary-color);
  font-size: 1.1rem;
}

.form-control {
  width: 100%;
  padding: 1rem;
  border: 2px solid #ddd;
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
  background: #fafafa;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(102, 102, 102, 0.2);
  background: white;
}

/* Cartes */
.card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 2rem;
  margin-bottom: 2rem;
  border: 1px solid #e0e0e0;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border-left: 5px solid var(--gradient-start);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.card-header {
  border-bottom: 1px solid #eee;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title {
  font-size: 1.7rem;
  color: var(--primary-color);
  position: relative;
  padding-right: 1rem;
}

.card-title:after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--gradient-start);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
}

.card-actions {
  display: flex;
  gap: 0.75rem;
}

/* Liste des projets */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2.5rem;
  margin-top: 2.5rem;
}

.project-card {
  background: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  border: 1px solid #e0e0e0;
  position: relative;
  transform: scale(1);
  border-left: 5px solid var(--gradient-start);
}

.project-card:hover {
  transform: scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.project-header {
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
  color: white;
  padding: 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.project-header:before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
  transform: rotate(30deg);
}

.project-title {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
  position: relative;
  z-index: 2;
}

.project-meta {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  font-size: 1rem;
  opacity: 0.9;
  position: relative;
  z-index: 2;
}

.project-content {
  padding: 2rem;
}

.project-stats {
  display: flex;
  justify-content: space-between;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid #eee;
}

.stat-item {
  text-align: center;
  padding: 1rem;
  border-radius: var(--border-radius);
  background: rgba(0, 0, 0, 0.03);
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(0, 0, 0, 0.08);
  transform: translateY(-3px);
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

/* Tableau des éléments */
.table-container {
  overflow-x: auto;
  margin: 2.5rem 0;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  border: 1px solid #e0e0e0;
  background: white;
  position: relative;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

th, td {
  padding: 1.25rem;
  text-align: left;
  border-bottom: 1px solid #eee;
  position: relative;
}

th {
  background: linear-gradient(135deg, var(--light-color) 0%, #e8e8e8 100%);
  font-weight: 700;
  color: var(--primary-color);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

tr:hover {
  background-color: rgba(0, 0, 0, 0.05);
  transform: scale(1.01);
}

tr:nth-child(even) {
  background-color: rgba(0, 0, 0, 0.02);
}

/* Messages d'erreur et succès */
.alert {
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin: 1.5rem 0;
  border: 1px solid transparent;
  font-weight: 500;
  position: relative;
  overflow: hidden;
  box-shadow: var(--box-shadow);
}

.alert:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: var(--gradient-start);
}

.alert-success {
  background-color: #e8f5e9;
  color: #2e7d32;
  border-color: #c8e6c9;
}

.alert-error {
  background-color: #ffebee;
  color: #c62828;
  border-color: #ffcdd2;
}

.alert-info {
  background-color: #e3f2fd;
  color: #1565c0;
  border-color: #bbdefb;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin: 3rem 0;
  flex-wrap: wrap;
}

.page-item {
  padding: 0.8rem 1.5rem;
  border: 2px solid #ddd;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
  background: white;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.page-item:hover {
  background: var(--light-color);
  transform: translateY(-2px);
  border-color: var(--accent-color);
}

.page-item.active {
  background: var(--gradient-start);
  color: white;
  border-color: var(--gradient-start);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Footer */
footer {
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
  color: white;
  text-align: center;
  padding: 3rem 0;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
}

footer:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.3) 100%);
}

/* Responsive */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 1rem;
    padding: 0 1rem;
  }

  .nav-links {
    width: 100%;
    justify-content: center;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  h1 {
    font-size: 2.2rem;
  }

  .container {
    padding: 0 1rem;
  }

  .form-container {
    padding: 1.5rem;
  }

  .card {
    padding: 1.5rem;
  }

  th, td {
    padding: 0.75rem;
    font-size: 0.9rem;
  }

  .project-card {
    margin-bottom: 1.5rem;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.8s ease-out;
  animation-fill-mode: both;
}

/* Séparateurs */
.section-divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gradient-start), transparent);
  margin: 4rem 0;
  position: relative;
}

.section-divider:before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 25px;
  height: 25px;
  background: var(--gradient-start);
  border-radius: 50%;
  box-shadow: 0 0 0 5px white, 0 0 15px rgba(0, 0, 0, 0.3);
}

/* Indicateurs de chargement */
.loading {
  display: inline-block;
  width: 25px;
  height: 25px;
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-left-color: var(--gradient-start);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Espacement */
.mb-1 { margin-bottom: 0.75rem; }
.mb-2 { margin-bottom: 1.5rem; }
.mb-3 { margin-bottom: 2.25rem; }
.mb-4 { margin-bottom: 3rem; }
.mt-1 { margin-top: 0.75rem; }
.mt-2 { margin-top: 1.5rem; }
.mt-3 { margin-top: 2.25rem; }
.mt-4 { margin-top: 3rem; }

/* Effets spéciaux */
.shadow-lg {
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25) !important;
}

.glow {
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.15) !important;
}

/* Effet de gradient sur les titres */
.gradient-text {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}