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

:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --secondary: #06b6d4;
  --success: #10b981;
  --danger: #ef4444;
  --dark: #1e293b;
  --light: #f8fafc;
  --gray: #64748b;
  --border: #e2e8f0;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

/* Formes flottantes */
.floating-shapes {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
}

.shape {
  position: absolute;
  opacity: 0.1;
  animation: float 20s infinite ease-in-out;
}

.shape:nth-child(1) {
  top: 15%;
  left: 15%;
  animation-delay: 0s;
}

.shape:nth-child(2) {
  top: 70%;
  left: 75%;
  animation-delay: 3s;
}

.shape:nth-child(3) {
  top: 50%;
  left: 10%;
  animation-delay: 6s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-30px) rotate(180deg);
  }
}

.container {
  max-width: 450px;
  width: 100%;
  margin: 0 1rem;
  position: relative;
  z-index: 1;
}

.auth-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 24px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  animation: slideUp 0.6s ease-out;
}

.auth-header {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 2rem;
  text-align: center;
  color: white;
}

.auth-header .logo {
  width: 70px;
  height: 70px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 2rem;
  border: 3px solid rgba(255, 255, 255, 0.3);
}

.auth-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.auth-header p {
  font-size: 0.95rem;
  opacity: 0.9;
}

.auth-body {
  padding: 2rem;
}

.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  background: var(--light);
  padding: 0.5rem;
  border-radius: 12px;
}

.tab {
  flex: 1;
  padding: 0.75rem;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--gray);
  cursor: pointer;
  transition: all 0.3s ease;
}

.tab.active {
  background: white;
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.2);
}

.form-container {
  position: relative;
}

.form {
  display: none;
  animation: fadeIn 0.4s ease;
}

.form.active {
  display: block;
}

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

.form-group label {
  display: block;
  color: var(--dark);
  font-weight: 500;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.input-wrapper {
  position: relative;
}

.input-wrapper i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray);
  font-size: 1rem;
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem 0.875rem 3rem;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  background: white;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.password-toggle {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--gray);
  cursor: pointer;
  font-size: 1rem;
  transition: color 0.3s ease;
}

.password-toggle:hover {
  color: var(--primary);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--primary);
}

.checkbox-group label {
  font-size: 0.9rem;
  color: var(--gray);
  cursor: pointer;
  margin: 0;
}

.forgot-password {
  text-align: right;
  margin-bottom: 1.5rem;
}

.forgot-password a {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

.forgot-password a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.btn {
  width: 100%;
  padding: 1rem;
  border: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.5);
}

.divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
  color: var(--gray);
  font-size: 0.9rem;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.social-login {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.btn-social {
  padding: 0.875rem;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: white;
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-social:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

.btn-social i {
  font-size: 1.1rem;
}

.btn-google {
  color: #db4437;
}
.btn-github {
  color: #333;
}

.auth-footer {
  text-align: center;
  padding: 1.5rem 2rem;
  background: var(--light);
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--gray);
}

.auth-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  margin-left: 0.25rem;
}

.auth-footer a:hover {
  text-decoration: underline;
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    margin: 1rem;
  }

  .auth-card {
    border-radius: 20px;
  }

  .auth-header {
    padding: 1.5rem;
  }

  .auth-header h1 {
    font-size: 1.5rem;
  }

  .auth-body {
    padding: 1.5rem;
  }

  .social-login {
    grid-template-columns: 1fr;
  }
}