/* ===========================================
   PLUZZPAY AUTHENTICATION - PERFECT RESPONSIVE DESIGN
   =========================================== */

/* Base Styles */
body {
  font-family: var(--font-family);
  color: var(--text-primary);
  min-height: 100vh;
  margin: 0;
  line-height: var(--line-height-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  position: relative;
}

/* Background Image with Gradient Overlay */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('https://images.unsplash.com/photo-1613243555978-636c48dc653c?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: -2;
}

/* Dark Gradient Overlay */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(13, 45, 94, 0.85) 0%, 
    rgba(26, 75, 140, 0.9) 100%);
  z-index: -1;
}

/* Auth Containers */
.login-container,
.signup-container {
  width: 100%;
  max-width: 440px;
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  margin: var(--spacing-md);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-card,
.signup-card {
  background: rgba(255, 255, 255, 0.98);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transform: translateZ(0);
  width: 100%;
}

/* Logo */
.logo-container {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.logo-circle {
  width: 70px;
  height: 70px;
  background: var(--gradient-primary);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  box-shadow: var(--shadow-md);
  border: 2px solid rgba(255, 255, 255, 0.25);
  transition: all var(--transition-normal);
}

.logo-circle:hover {
  transform: scale(1.05);
}

.logo-circle img {
  width: 35px;
  height: 35px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

/* Titles */
.login-title,
.signup-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.login-title h2,
.signup-title h1 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.login-title p,
.signup-title p {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  margin: 0;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.form-input {
  width: 100%;
  height: 48px;
  padding: 0 var(--spacing-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-primary);
  box-shadow: 0 0 0 3px rgba(26, 75, 140, 0.1);
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

.form-input.error {
  border-color: var(--danger);
  background: var(--danger-bg);
  animation: shake 0.3s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

/* Password Container */
.password-container {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--spacing-xs);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
}

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

.password-toggle i {
  font-size: var(--font-size-lg);
}

/* Error Messages */
.error-message {
  color: var(--danger);
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  animation: fadeIn 0.3s ease;
}

.error-message i {
  font-size: var(--font-size-xs);
}

/* Remember Me & Forgot Password */
.remember-me {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
}

.remember-me input[type="checkbox"] {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  appearance: none;
  transition: all var(--transition-normal);
  background: var(--bg-primary);
}

.remember-me input[type="checkbox"]:checked {
  background: var(--gradient-primary);
  border-color: transparent;
}

.remember-me input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  color: var(--text-light);
  font-size: 12px;
  font-weight: bold;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.remember-me label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
}

.forgot-password {
  text-align: right;
  margin-top: var(--spacing-xs);
}

.forgot-password a {
  color: var(--primary);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
}

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

/* Buttons */
.submit-btn {
  width: 100%;
  height: 48px;
  background: var(--gradient-primary);
  color: var(--text-light);
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.submit-btn:hover {
  background: var(--gradient-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.submit-btn.loading {
  color: transparent;
}

.submit-btn.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--text-light);
  animation: spin 0.8s linear infinite;
}

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

/* Links */
.signup-link {
  text-align: center;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.signup-link a {
  color: var(--primary);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  margin-left: var(--spacing-xs);
  transition: all var(--transition-fast);
}

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

/* Messages */
.message {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: var(--glass-bg);
  border-radius: var(--border-radius);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-modal);
  animation: slideInRight 0.3s ease-out;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  max-width: 400px;
}

.message.success {
  border-left: 4px solid var(--success);
  background: var(--success-bg);
}

.message.error {
  border-left: 4px solid var(--danger);
  background: var(--danger-bg);
}

.message i {
  font-size: var(--font-size-xl);
}

.message.success i {
  color: var(--success);
}

.message.error i {
  color: var(--danger);
}

.message span {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--gradient-primary);
  color: var(--text-light);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  z-index: var(--z-tooltip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--spacing-md);
}

/* ============ MOBILE RESPONSIVE ============ */

/* Tablet and Mobile (max-width: 768px) */
@media (max-width: 768px) {
  body {
    padding: var(--spacing-md);
    align-items: center; /* Changed from flex-start to center */
  }
  
  .login-container,
  .signup-container {
    max-width: 400px;
    margin: var(--spacing-sm);
  }
  
  .login-card,
  .signup-card {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.98);
  }
  
  .logo-circle {
    width: 60px;
    height: 60px;
  }
  
  .logo-circle img {
    width: 30px;
    height: 30px;
  }
  
  .login-title h2,
  .signup-title h1 {
    font-size: var(--font-size-xl);
  }
  
  .login-title p,
  .signup-title p {
    font-size: var(--font-size-sm);
  }
  
  .form-input {
    height: 44px;
    font-size: var(--font-size-sm);
  }
  
  .submit-btn {
    height: 44px;
    font-size: var(--font-size-sm);
  }
  
  .message {
    left: var(--spacing-md);
    right: var(--spacing-md);
    top: var(--spacing-md);
    max-width: none;
  }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
  body {
    padding: var(--spacing-sm);
  }
  
  .login-container,
  .signup-container {
    max-width: 100%;
    margin: 0;
  }
  
  .login-card,
  .signup-card {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
  }
  
  .logo-circle {
    width: 50px;
    height: 50px;
  }
  
  .logo-circle img {
    width: 25px;
    height: 25px;
  }
  
  .login-title h2,
  .signup-title h1 {
    font-size: var(--font-size-lg);
  }
  
  .form-group {
    margin-bottom: var(--spacing-sm);
  }
  
  .form-input {
    height: 42px;
    font-size: var(--font-size-sm);
  }
  
  .password-toggle i {
    font-size: var(--font-size-base);
  }
  
  .remember-me {
    margin: var(--spacing-sm) 0;
  }
  
  .submit-btn {
    height: 42px;
    margin-top: var(--spacing-sm);
  }
  
  .signup-link {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
  }
}

/* Very Small Mobile (max-width: 360px) */
@media (max-width: 360px) {
  .login-card,
  .signup-card {
    padding: var(--spacing-sm);
  }
  
  .logo-circle {
    width: 45px;
    height: 45px;
  }
  
  .logo-circle img {
    width: 22px;
    height: 22px;
  }
  
  .form-input {
    height: 40px;
    padding: 0 var(--spacing-sm);
  }
  
  .submit-btn {
    height: 40px;
  }
  
  .remember-me label,
  .forgot-password a {
    font-size: var(--font-size-xs);
  }
}

/* Landscape Mode */
@media (max-height: 600px) and (orientation: landscape) {
  body {
    align-items: flex-start;
    padding: var(--spacing-md);
  }
  
  .login-container,
  .signup-container {
    margin: var(--spacing-sm) auto;
  }
  
  .login-card,
  .signup-card {
    padding: var(--spacing-md);
  }
  
  .logo-container {
    margin-bottom: var(--spacing-md);
  }
  
  .logo-circle {
    width: 45px;
    height: 45px;
  }
  
  .logo-circle img {
    width: 22px;
    height: 22px;
  }
  
  .login-title {
    margin-bottom: var(--spacing-md);
  }
  
  .form-group {
    margin-bottom: var(--spacing-xs);
  }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}