/* ===== AUTH LAYOUT ===== */
.auth-container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  padding: var(--space-4);
}

.auth-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.auth-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.auth-header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: shimmer 3s ease-in-out infinite;
}

.auth-logo {
  position: relative;
  z-index: 1;
}

.auth-logo h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-2);
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.auth-logo p {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.auth-body {
  padding: var(--space-8) var(--space-6);
}

.auth-title {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-title h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.auth-title p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  position: relative;
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group.focused {
  transform: translateY(-1px);
}

.input-icon {
  position: absolute;
  left: var(--space-3);
  font-size: var(--font-size-lg);
  color: var(--text-muted);
  z-index: 2;
  pointer-events: none;
  transition: color var(--transition-fast);
}

.input-group.focused .input-icon {
  color: var(--primary);
}

.form-input {
  width: 100%;
  padding: var(--space-4) var(--space-4);
  padding-left: var(--space-12);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  background: var(--surface);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  position: relative;
  z-index: 1;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  background: var(--white);
}

.form-input:hover:not(:focus) {
  border-color: var(--gray-300);
}

.form-input::placeholder {
  color: var(--text-muted);
  transition: opacity var(--transition-fast);
}

.form-input:focus::placeholder {
  opacity: 0.7;
}

.input-action {
  position: absolute;
  right: var(--space-3);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: all var(--transition-fast);
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
}

.input-action:hover {
  background: var(--gray-100);
  color: var(--text-primary);
  transform: scale(1.1);
}

.input-action:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.form-error {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-top: var(--space-1);
  animation: slideDown 0.3s ease;
}

.form-error span {
  font-size: var(--font-size-sm);
  color: var(--danger);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-error span::before {
  content: '⚠️';
  font-size: var(--font-size-xs);
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-2) 0;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  padding: var(--space-1);
  border-radius: var(--radius-sm);
}

.checkbox-label:hover {
  background: var(--gray-50);
}

.checkbox-input {
  display: none;
}

.checkbox-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  position: relative;
  transition: all var(--transition-fast);
  background: var(--surface);
}

.checkbox-input:checked + .checkbox-custom {
  background: var(--primary);
  border-color: var(--primary);
  transform: scale(1.05);
}

.checkbox-input:checked + .checkbox-custom::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--white);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  animation: checkmark 0.3s ease;
}

.checkbox-text {
  color: var(--text-secondary);
  user-select: none;
}

.link-primary {
  color: var(--primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.link-primary:hover {
  color: var(--primary-dark);
  background: var(--primary-light);
  text-decoration: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  user-select: none;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 2px 4px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(99, 102, 241, 0.2);
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
}

.btn-full {
  width: 100%;
  padding: var(--space-4) var(--space-6);
}

.btn-text {
  position: relative;
  z-index: 1;
  transition: opacity var(--transition-fast);
}

.btn-icon {
  position: relative;
  z-index: 1;
  transition: transform var(--transition-fast);
  font-size: var(--font-size-lg);
}

.btn-loading {
  position: relative;
  z-index: 1;
  opacity: 0;
  transition: opacity var(--transition-fast);
  font-size: var(--font-size-lg);
}

.btn:hover:not(:disabled) .btn-icon {
  transform: translateX(4px);
}

.btn.loading .btn-text,
.btn.loading .btn-icon {
  opacity: 0;
}

.btn.loading .btn-loading {
  opacity: 1;
  animation: spin 1s linear infinite;
}

/* ===== BACKGROUND SHAPES ===== */
.auth-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: 1;
  pointer-events: none;
}

.bg-shape {
  position: absolute;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  animation: float 8s ease-in-out infinite;
  pointer-events: none;
}

.bg-shape-1 {
  width: 200px;
  height: 200px;
  top: 10%;
  left: -50px;
  animation-delay: 0s;
}

.bg-shape-2 {
  width: 150px;
  height: 150px;
  top: 60%;
  right: -30px;
  animation-delay: 2.5s;
}

.bg-shape-3 {
  width: 100px;
  height: 100px;
  bottom: 20%;
  left: 20%;
  animation-delay: 5s;
}

/* ===== ANIMATIONS ===== */
@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
    opacity: 0.8;
  }
  50% {
    transform: translateY(-15px) rotate(180deg);
    opacity: 1;
  }
}

@keyframes shimmer {
  0%, 100% {
    transform: translateX(-100%) translateY(-100%) rotate(45deg);
  }
  50% {
    transform: translateX(100%) translateY(100%) rotate(45deg);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes checkmark {
  0% {
    transform: translate(-50%, -50%) scale(0);
  }
  50% {
    transform: translate(-50%, -50%) scale(1.2);
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .auth-container {
    padding: var(--space-2);
    max-width: 100%;
  }
  
  .auth-header {
    padding: var(--space-6) var(--space-4);
  }
  
  .auth-body {
    padding: var(--space-6) var(--space-4);
  }
  
  .form-options {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  
  .auth-logo h1 {
    font-size: var(--font-size-2xl);
  }
  
  .auth-title h2 {
    font-size: var(--font-size-xl);
  }
}

@media (max-width: 480px) {
  .auth-container {
    padding: var(--space-1);
  }
  
  .auth-header {
    padding: var(--space-5) var(--space-3);
  }
  
  .auth-body {
    padding: var(--space-5) var(--space-3);
  }
  
  .form-input {
    padding: var(--space-3) var(--space-3);
    padding-left: var(--space-10);
  }
  
  .input-icon {
    left: var(--space-2);
  }
  
  .input-action {
    right: var(--space-2);
  }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  .auth-card {
    background: var(--gray-800);
    border-color: var(--gray-700);
  }
  
  .form-input {
    background: var(--gray-700);
    border-color: var(--gray-600);
    color: var(--white);
  }
  
  .form-input:focus {
    background: var(--gray-600);
  }
}