/* =====================================================
   PROFESSIONAL LOGIN INTERFACE
   ===================================================== */

:root {
  /* Professional Login Colors */
  --login-primary-blue: #2563eb;
  --login-primary-blue-hover: #1d4ed8;
  --login-accent-orange: #ea580c;
  --login-bg-primary: #0f172a;
  --login-bg-secondary: #1e293b;
  --login-bg-tertiary: #334155;
  --login-text-primary: #f8fafc;
  --login-text-secondary: #cbd5e1;
  --login-text-muted: #94a3b8;
  --login-border-primary: #334155;
  --login-border-secondary: #475569;
  
  /* Interactive Neon Effects (for hover states only) */
  --login-neon-blue: #60a5fa;
  --login-glow-blue: 0 0 20px rgba(96, 165, 250, 0.3);
  
  /* Transitions */
  --login-transition-fast: 0.15s ease-out;
  --login-transition-medium: 0.3s ease-out;
  
  /* Shadows */
  --login-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --login-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --login-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Professional Animations */
@keyframes loginFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

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

@keyframes loginPulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

@keyframes loginShake {
  0%, 100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-4px);
  }
  75% {
    transform: translateX(4px);
  }
}

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

/* Login Overlay */
.login-overlay {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, var(--login-bg-primary) 0%, var(--login-bg-secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  transition: opacity var(--login-transition-medium);
  animation: loginFadeIn 0.6s ease-out;
}

.login-overlay::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(234, 88, 12, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.login-overlay.hidden {
  display: none;
  opacity: 0;
}

/* Login Card */
.login-card {
  background-color: var(--login-bg-secondary);
  border: 1px solid var(--login-border-primary);
  border-radius: 16px;
  width: 100%;
  max-width: 400px;
  padding: 40px 32px;
  box-shadow: var(--login-shadow-xl);
  position: relative;
  animation: loginFadeIn 0.5s ease-out;
}

.login-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--login-primary-blue), var(--login-accent-orange));
  border-radius: 16px 16px 0 0;
}

/* Login Header */
.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--login-primary-blue), var(--login-accent-orange));
  padding: 4px;
  transition: transform var(--login-transition-fast);
  box-shadow: var(--login-shadow-md);
}

.login-logo:hover {
  transform: scale(1.05);
  box-shadow: var(--login-glow-blue);
}

.login-header h2 {
  font-size: 24px;
  color: var(--login-text-primary);
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.025em;
}

/* Login Form */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  position: relative;
  animation: loginSlideIn 0.4s ease-out;
}

.form-group:nth-child(2) {
  animation-delay: 0.1s;
}

.form-group:nth-child(3) {
  animation-delay: 0.2s;
}

.form-group label {
  display: block;
  color: var(--login-text-secondary);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
}

/* Input Wrapper */
.input-wrapper {
  position: relative;
  width: 100%;
}

.input-wrapper svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  z-index: 2;
  transition: all var(--login-transition-fast);
  stroke: var(--login-text-muted);
}

.input-wrapper input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  background-color: var(--login-bg-tertiary);
  border: 1px solid var(--login-border-primary);
  border-radius: 8px;
  color: var(--login-text-primary);
  font-size: 14px;
  outline: none;
  transition: all var(--login-transition-fast);
  font-family: inherit;
}

.input-wrapper input:focus {
  border-color: var(--login-primary-blue);
  background-color: var(--login-bg-secondary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-wrapper input:focus + svg {
  stroke: var(--login-primary-blue);
}

.input-wrapper input::placeholder {
  color: var(--login-text-muted);
}

.input-wrapper input:hover {
  border-color: var(--login-border-secondary);
}

.input-wrapper input:hover + svg {
  stroke: var(--login-text-secondary);
}

/* Password Toggle */
#togglePassword {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  transition: all var(--login-transition-fast);
  z-index: 2;
}

#togglePassword:hover {
  background-color: var(--login-bg-primary);
  box-shadow: 0 0 0 1px var(--login-neon-blue);
}

#togglePassword svg {
  width: 16px;
  height: 16px;
  display: block;
  transition: all var(--login-transition-fast);
  stroke: var(--login-text-muted);
}

#togglePassword:hover svg {
  stroke: var(--login-neon-blue);
}

#togglePassword .eye-off {
  display: none;
}

#togglePassword.active .eye {
  display: none;
}

#togglePassword.active .eye-off {
  display: block;
}

#togglePassword.active svg {
  stroke: var(--login-primary-blue);
}

/* Login Button */
.login-button {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--login-primary-blue), var(--login-primary-blue-hover));
  color: white;
  border: none;
  padding: 14px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--login-transition-fast);
  position: relative;
  height: 48px;
  width: 100%;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  overflow: hidden;
  box-shadow: var(--login-shadow-md);
}

.login-button::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 var(--login-transition-fast);
}

.login-button:hover::before {
  left: 100%;
}

.login-button:hover {
  background: linear-gradient(135deg, var(--login-primary-blue-hover), var(--login-primary-blue));
  box-shadow: var(--login-glow-blue);
  transform: translateY(-1px);
}

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

.login-button:disabled {
  background: var(--login-bg-tertiary);
  color: var(--login-text-muted);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.login-button:disabled:hover {
  transform: none;
  box-shadow: none;
}

.login-button:disabled::before {
  display: none;
}

/* Spinner */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  animation: loginSpin 1s linear infinite;
  margin-left: 8px;
}

.spinner.hidden {
  display: none;
}

.login-button.loading {
  background: var(--login-bg-tertiary);
  cursor: wait;
  animation: loginPulse 1.5s infinite;
}

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

.login-button.loading span {
  display: none;
}

/* Error States */
.input-wrapper.error input {
  border-color: #ef4444;
  background-color: rgba(239, 68, 68, 0.1);
  animation: loginShake 0.5s ease-in-out;
}

.input-wrapper.error svg {
  stroke: #ef4444;
}

/* Success States */
.input-wrapper.success input {
  border-color: #10b981;
  background-color: rgba(16, 185, 129, 0.1);
}

.input-wrapper.success svg {
  stroke: #10b981;
}

/* Responsive Design */
@media (max-width: 480px) {
  .login-card {
    max-width: 90%;
    padding: 32px 24px;
    margin: 16px;
  }
  
  .login-logo {
    width: 56px;
    height: 56px;
  }
  
  .login-header h2 {
    font-size: 20px;
  }
  
  .input-wrapper input {
    padding: 10px 14px 10px 40px;
    font-size: 14px;
  }
  
  .login-button {
    height: 44px;
    font-size: 13px;
  }
  
  .form-group {
    gap: 20px;
  }
}

@media (max-width: 320px) {
  .login-card {
    padding: 24px 16px;
  }
  
  .login-form {
    gap: 20px;
  }
  
  .input-wrapper input {
    padding: 8px 12px 8px 36px;
  }
  
  .input-wrapper svg {
    width: 16px;
    height: 16px;
    left: 10px;
  }
  
  #togglePassword {
    right: 10px;
    width: 28px;
    height: 28px;
  }
  
  #togglePassword svg {
    width: 14px;
    height: 14px;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .login-overlay,
  .login-card,
  .login-logo,
  .login-button,
  .spinner,
  .form-group {
    animation: none !important;
  }
  
  .login-button::before {
    transition: none !important;
  }
}

@media (prefers-contrast: high) {
  :root {
    --login-primary-blue: #4285f4;
    --login-accent-orange: #ff6d01;
    --login-text-primary: #ffffff;
    --login-bg-primary: #000000;
    --login-border-primary: #ffffff;
  }
  
  .login-card {
    border-color: #ffffff;
  }
  
  .input-wrapper input {
    border-color: #ffffff;
  }
}

/* Focus indicators for accessibility */
.login-button:focus,
.input-wrapper input:focus,
#togglePassword:focus {
  outline: 2px solid var(--login-primary-blue);
  outline-offset: 2px;
}

/* Loading overlay */
.login-overlay.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(2px);
  z-index: 1;
}

/* Professional hover effects for interactive elements */
.login-card:hover {
  box-shadow: var(--login-shadow-xl), 0 0 0 1px rgba(37, 99, 235, 0.1);
}

/* Subtle animations for form elements */
.form-group:hover label {
  color: var(--login-text-primary);
  transition: color var(--login-transition-fast);
}

/* Enhanced visual feedback */
.input-wrapper input:valid {
  border-color: var(--login-border-secondary);
}

.input-wrapper input:invalid:not(:placeholder-shown) {
  border-color: #ef4444;
}

/* Professional loading state */
.login-button.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}