/* Modern Dark Flat Design Login Page Styles */
:root {
  /* Dark Color Palette */
  --primary-color: #6366F1;
  --primary-dark: #4F46E5;
  --primary-light: #A5B4FC;
  --accent-color: #10B981;
  --accent-dark: #059669;
  
  /* Text Colors */
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-hint: #64748B;
  --text-white: #FFFFFF;
  
  /* Background Colors */
  --background-primary: #0F172A;
  --background-secondary: #1E293B;
  --background-dark: #334155;
  --background-card: #1E293B;
  --background-hover: #334155;
  
  /* Border Colors */
  --border-light: #334155;
  --border-medium: #475569;
  --border-accent: #6366F1;
  
  /* Shadow System */
  --shadow-light: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-medium: 0 4px 6px rgba(0,0,0,0.4);
  --shadow-heavy: 0 10px 15px rgba(0,0,0,0.5);
  
  /* Border Radius */
  --radius-small: 6px;
  --radius-medium: 8px;
  --radius-large: 12px;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--background-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  color: var(--text-primary);
}

.login-container {
  position: relative;
  width: 100%;
  max-width: 400px;
  z-index: 1;
}

.login-card {
  background: var(--background-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-heavy);
  padding: var(--spacing-xxl);
  position: relative;
  overflow: hidden;
}

.login-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

/* Header Styles */
.login-header {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.logo {
  width: 64px;
  height: 64px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  box-shadow: var(--shadow-medium);
}

.logo i {
  font-size: 32px;
  color: var(--text-white);
}

.login-title {
  font-size: 28px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.login-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 400;
}

/* Form Styles */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Error Message */
.error-message {
  background: #FFEBEE;
  border: 1px solid #FFCDD2;
  border-radius: var(--radius-medium);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: #D32F2F;
  font-size: 14px;
  animation: slideDown 0.3s ease-out;
}

.error-message i {
  font-size: 20px;
}

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

/* Input Group */
.input-group {
  position: relative;
}

.input-container {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 56px;
}

.input-icon {
  position: absolute;
  left: var(--spacing-md);
  color: var(--text-secondary);
  font-size: 20px;
  z-index: 2;
  transition: color 0.3s ease;
}

.input-field {
  width: 100%;
  padding: 20px 16px 16px 48px;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-medium);
  font-size: 16px;
  font-family: inherit;
  background: var(--background-primary);
  color: var(--text-primary);
  transition: all 0.3s ease;
  outline: none;
  min-height: 56px;
  box-sizing: border-box;
}

.input-field:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.input-field:focus + .input-label,
.input-field:not(:placeholder-shown) + .input-label {
  transform: translateY(-28px) scale(0.85);
  color: var(--primary-color);
  background: var(--background-primary);
  padding: 0 8px;
  max-width: none;
  white-space: nowrap;
}

.input-field:focus ~ .input-icon {
  color: var(--primary-color);
}

.input-label {
  position: absolute;
  left: 48px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 16px;
  pointer-events: none;
  transition: all 0.3s ease;
  background: var(--background-primary);
  padding: 0 8px;
  white-space: nowrap;
  max-width: calc(100% - 96px);
  overflow: hidden;
  text-overflow: ellipsis;
}

.input-underline {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-color);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.input-field:focus ~ .input-underline {
  transform: scaleX(1);
}

.password-toggle {
  position: absolute;
  right: var(--spacing-md);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-small);
  transition: all 0.3s ease;
  z-index: 2;
}

.password-toggle:hover {
  color: var(--primary-color);
  background: rgba(33, 150, 243, 0.1);
}

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

.checkbox-container {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
}

.checkbox-container input[type="checkbox"] {
  display: none;
}

.checkmark {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-medium);
  border-radius: var(--radius-small);
  margin-right: var(--spacing-sm);
  position: relative;
  transition: all 0.3s ease;
}

.checkbox-container input[type="checkbox"]:checked + .checkmark {
  background: var(--primary-color);
  border-color: var(--primary-color);
}

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

/* Login Button */
.login-button {
  background: var(--primary-color);
  color: var(--text-white);
  border: none;
  border-radius: var(--radius-medium);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 16px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-medium);
  margin-top: var(--spacing-md);
}

.login-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-heavy);
}

.login-button:active {
  transform: translateY(0);
}

.login-button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.button-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: none;
}

.button-loading.active {
  display: block;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid var(--text-white);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Forgot Password */
.forgot-password {
  text-align: center;
  margin-top: var(--spacing-lg);
}

.forgot-link {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

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

/* Footer */
.login-footer {
  text-align: center;
  margin-top: var(--spacing-xxl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-light);
}

.footer-text {
  font-size: 12px;
  color: var(--text-hint);
}

/* Background Elements */
.background-elements {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.circle {
  position: absolute;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(255, 152, 0, 0.1));
  animation: float 6s ease-in-out infinite;
}

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

.circle-2 {
  width: 150px;
  height: 150px;
  top: 60%;
  right: 10%;
  animation-delay: 2s;
}

.circle-3 {
  width: 100px;
  height: 100px;
  bottom: 20%;
  left: 20%;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(180deg);
  }
}

/* Responsive Design */
@media (max-width: 480px) {
  .login-card {
    padding: var(--spacing-lg);
    margin: var(--spacing-md);
  }
  
  .login-title {
    font-size: 24px;
  }
  
  .logo {
    width: 56px;
    height: 56px;
  }
  
  .logo i {
    font-size: 28px;
  }
}

/* Loading State */
.login-form.loading .input-field {
  opacity: 0.7;
  pointer-events: none;
}

.login-form.loading .login-button .button-text {
  opacity: 0;
}

.login-form.loading .login-button .button-loading {
  display: block;
}

/* Success Animation */
@keyframes successPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(76, 175, 80, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
  }
}

.login-button.success {
  background: linear-gradient(135deg, #4CAF50, #388E3C);
  animation: successPulse 0.6s ease-out;
}