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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background-color: #0f172a;
  color: #f8fafc;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
  gap: 2rem;
}

header {
  text-align: center;
  padding: 2.5rem 3rem;
  background: #1e293b;
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  border: 1px solid #334155;
  width: 100%;
  max-width: 650px;
}

.navbar ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.navbar a {
  color: #94a3b8;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  display: inline-block;
  padding: 0.2rem 0;
  transition: color 0.3s ease, transform 0.2s ease;
}

.navbar a:hover,
.navbar a.active {
  color: #38bdf8;
  transform: translateY(-2px);
}

.navbar a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: #38bdf8;
  border-radius: 2px;
  transition: width 0.3s ease;
}

.navbar a:hover::after,
.navbar a.active::after {
  width: 100%;
}

header p {
  color: #94a3b8;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.zone-intro, .zone-form, .about-content {
  width: 100%;
  max-width: 650px;
  background: #1e293b;
  border-radius: 16px;
  padding: 2rem;
  border: 1px solid #334155;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.about-content h2, .zone-form h2 {
  color: #38bdf8;
  margin-bottom: 1rem;
}

.about-content p {
  color: #94a3b8;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.zone-image {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 1rem;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.imgVitrine {
  width: 320px;
  height: 320px;
  object-fit: cover;
  display: block;
  border-radius: 50%;
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.5),
              0 0 60px rgba(56, 189, 248, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.imgVitrine:hover {
  transform: scale(1.03);
  box-shadow: 0 0 40px rgba(56, 189, 248, 0.8),
              0 0 80px rgba(56, 189, 248, 0.5);
}

/* Formulaires */
.form-group {
  margin-bottom: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  color: #94a3b8;
  font-size: 0.9rem;
  font-weight: 600;
}

.input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 8px;
  color: #f8fafc;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.input:focus {
  border-color: #38bdf8;
}

.textarea {
  resize: vertical;
}

.btn-group {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  color: #0f172a;
}

.btn-secondary {
  background: #334155;
  color: #f8fafc;
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.footer {
  background: #1e293b;
  border-radius: 16px;
  padding: 1.5rem 2rem;
  border: 1px solid #334155;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  width: 100%;
  max-width: 650px;
  text-align: center;
  color: #94a3b8;
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer a {
  color: #38bdf8;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: #818cf8;
  text-decoration: underline;
}