body {
  background-color: #f3f4f6;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.auth-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
}

.back-link {
  display: block;
  margin-bottom: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.auth-card {
  background: white;
  padding: 40px;
  border-radius: 20px;
  box-shadow: var(--shadow-md);
}

.auth-header {
  text-align: center;
  margin-bottom: 30px;
}

.auth-header .logo-box {
  margin: 0 auto 15px;
}

.auth-tabs {
  display: flex;
  background: #f3f4f6;
  padding: 4px;
  border-radius: 12px;
  margin-bottom: 30px;
}

.tab-btn {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-muted);
  transition: 0.2s;
}

.tab-btn.active {
  background: white;
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}

.auth-form {
  display: none;
}
.auth-form.active {
  display: block;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

input {
  width: 100%;
  padding: 12px;
  border: 2px solid #e5e7eb;
  border-radius: 10px;
  font-family: inherit;
  font-size: 1rem;
  transition: 0.2s;
}

input:focus {
  outline: none;
  border-color: var(--primary);
}

.full-width {
  width: 100%;
}

.error-msg {
  color: #ef4444;
  font-size: 0.85rem;
  margin-top: 10px;
  text-align: center;
  min-height: 20px;
}

.avatar-grid {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.avatar-option {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.avatar-option:hover {
  transform: scale(1.1);
}
.avatar-option.selected {
  border-color: var(--text-main);
  transform: scale(1.1);
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  10%,
  30%,
  50%,
  70%,
  90% {
    transform: translateX(-5px);
  }
  20%,
  40%,
  60%,
  80% {
    transform: translateX(5px);
  }
}

.shake {
  animation: shake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

input.input-error {
  border-color: #ef4444;
  background-color: #fef2f2;
}

.validation-msg {
  color: #ef4444;
  font-size: 0.8rem;
  margin-top: 5px;
  display: block;
  opacity: 0;
  transform: translateY(-5px);
  transition: all 0.3s ease;
}

.validation-msg.visible {
  opacity: 1;
  transform: translateY(0);
}

.btn:active {
  transform: scale(0.98);
}

input:focus {
  transform: translateY(-2px);
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
}