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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter",
    sans-serif;
  background: #0a0a0f;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  line-height: 1.5;
  position: relative;
  overflow: hidden;
}

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

.neural-node {
  position: absolute;
  width: 2px;
  height: 2px;
  background: #3b82f6;
  border-radius: 50%;
  opacity: 0.6;
  animation: neuralPulse 4s ease-in-out infinite;
}

.neural-node:nth-child(1) {
  top: 20%;
  left: 15%;
  animation-delay: 0s;
}

.neural-node:nth-child(2) {
  top: 60%;
  left: 80%;
  animation-delay: 1s;
}

.neural-node:nth-child(3) {
  top: 80%;
  left: 20%;
  animation-delay: 2s;
}

.neural-node:nth-child(4) {
  top: 30%;
  left: 70%;
  animation-delay: 3s;
}

.neural-node:nth-child(5) {
  top: 10%;
  left: 60%;
  animation-delay: 4s;
}

@keyframes neuralPulse {
  0%,
  100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.5);
  }
}

.login-container {
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
}

.login-card {
  background: rgb(45 78 71 / 95%);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 20px;
  padding: 40px 32px;
  position: relative;
  overflow: hidden;
}

.ai-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(59, 130, 246, 0.1) 0%,
    transparent 70%
  );
  animation: aiGlow 6s ease-in-out infinite;
  pointer-events: none;
}

@keyframes aiGlow {
  0%,
  100% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(180deg) scale(1.1);
  }
}

.login-header {
  text-align: center;
  margin-bottom: 36px;
}

.ai-logo {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-core {
  position: relative;
  z-index: 3;
  color: #3b82f6;
  animation: coreRotate 8s linear infinite;
}

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

.logo-rings {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.ring {
  position: absolute;
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 50%;
  animation: ringPulse 3s ease-in-out infinite;
}

.ring-1 {
  width: 60px;
  height: 60px;
  top: 10px;
  left: 10px;
  animation-delay: 0s;
}

.ring-2 {
  width: 70px;
  height: 70px;
  top: 5px;
  left: 5px;
  animation-delay: 1s;
}

.ring-3 {
  width: 80px;
  height: 80px;
  top: 0;
  left: 0;
  animation-delay: 2s;
}

@keyframes ringPulse {
  0%,
  100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(1.05);
  }
}

.login-header h1 {
  color: #f8fafc;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.login-header p {
  color: #94a3b8;
  font-size: 14px;
  font-weight: 400;
}

/* Smart Fields */
.smart-field {
  position: relative;
  margin-bottom: 28px;
}

.field-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.smart-field input {
  width: 100%;
  background: transparent;
  border: none;
  padding: 16px 50px 16px 16px;
  color: #f8fafc;
  font-size: 15px;
  font-weight: 400;
  outline: none;
  position: relative;
  z-index: 2;
  font-family: inherit;
}

.smart-field input::placeholder {
  color: transparent;
}

.smart-field label {
  position: absolute;
  left: 16px;
  top: 50%;
  border-radius: 0.3rem;
  transform: translateY(-50%);
  color: #64748b;
  font-size: 15px;
  font-weight: 400;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 3;
  background: rgba(15, 15, 20, 0.8);
  padding: 0 4px;
}

.smart-field input:focus + label,
.smart-field input:not(:placeholder-shown) + label {
  top: 0;
  font-size: 12px;
  font-weight: 500;
  color: #3b82f6;
  transform: translateY(-50%);
}

.smart-field input:focus ~ .field-background {
  border-color: #3b82f6;
  background: rgba(30, 41, 59, 0.8);
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.5);
}

.ai-indicator {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  z-index: 4;
}

.ai-pulse {
  width: 100%;
  height: 100%;
  background: #3b82f6;
  border-radius: 50%;
  opacity: 0;
  animation: aiIndicator 2s ease-in-out infinite;
}

.smart-field input:focus ~ .ai-indicator .ai-pulse {
  opacity: 1;
}

@keyframes aiIndicator {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.6;
  }
  50% {
    transform: scale(1.5);
    opacity: 1;
  }
}

.field-completion {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6);
  width: 0%;
  transition: width 0.5s ease;
  border-radius: 0 0 12px 12px;
}

.smart-field input:valid ~ .field-completion {
  width: 100%;
}

/* Password Toggle */
.smart-field:has(.smart-toggle) input {
  padding-right: 90px;
}

.smart-toggle {
  position: absolute;
  right: 50px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: #64748b;
  padding: 6px;
  border-radius: 6px;
  transition: all 0.2s ease;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: center;
}

.smart-toggle:hover {
  color: #3b82f6;
  background: rgba(59, 130, 246, 0.1);
}

.toggle-hide {
  display: none;
}

.smart-toggle.toggle-active .toggle-show {
  display: none;
}

.smart-toggle.toggle-active .toggle-hide {
  display: block;
}

/* Form Options */
.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.smart-checkbox {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: 14px;
  color: #cbd5e1;
  font-weight: 500;
}

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

.checkbox-ai {
  width: 20px;
  height: 20px;
  margin-right: 10px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.checkbox-core {
  width: 100%;
  height: 100%;
  border: 1.5px solid rgba(59, 130, 246, 0.4);
  border-radius: 4px;
  background: rgba(30, 41, 59, 0.5);
  transition: all 0.3s ease;
  position: absolute;
}

.checkbox-ai svg {
  color: transparent;
  transition: color 0.3s ease;
  position: relative;
  z-index: 1;
}

.smart-checkbox input[type="checkbox"]:checked + .checkbox-ai .checkbox-core {
  background: #3b82f6;
  border-color: #3b82f6;
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.4);
}

.smart-checkbox input[type="checkbox"]:checked + .checkbox-ai svg {
  color: #ffffff;
}

.neural-link {
  color: #3b82f6;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  position: relative;
}

.neural-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: #3b82f6;
  transition: width 0.3s ease;
}

.neural-link:hover::after {
  width: 100%;
}

.neural-link:hover {
  color: #60a5fa;
}

/* Neural Button */
.neural-button {
  width: 100%;
  background: transparent;
  color: #ffffff;
  border: none;
  border-radius: 12px;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  position: relative;
  margin-bottom: 28px;
  overflow: hidden;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.button-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.neural-button:hover .button-bg {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  transform: scale(1.02);
}

.neural-button:active .button-bg {
  transform: scale(0.98);
}

.button-text {
  position: relative;
  z-index: 2;
  transition: opacity 0.2s ease;
}

.button-loader {
  position: absolute;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.neural-spinner {
  display: flex;
  gap: 4px;
}

.spinner-segment {
  width: 4px;
  height: 16px;
  background: #ffffff;
  border-radius: 2px;
  animation: neuralSpinner 1.2s ease-in-out infinite;
}

.spinner-segment:nth-child(2) {
  animation-delay: 0.1s;
}
.spinner-segment:nth-child(3) {
  animation-delay: 0.2s;
}

@keyframes neuralSpinner {
  0%,
  80%,
  100% {
    transform: scaleY(0.5);
    opacity: 0.5;
  }
  40% {
    transform: scaleY(1);
    opacity: 1;
  }
}

.neural-button.loading .button-text {
  opacity: 0;
}

.neural-button.loading .button-loader {
  opacity: 1;
}

.button-glow {
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 14px;
  opacity: 0;
  filter: blur(8px);
  transition: opacity 0.3s ease;
  z-index: -1;
}

.neural-button:hover .button-glow {
  opacity: 0.6;
}

/* Auth Separator */
.auth-separator {
  display: flex;
  align-items: center;
  margin: 28px 0;
  gap: 16px;
}

.separator-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(59, 130, 246, 0.3),
    transparent
  );
}

.separator-text {
  color: #64748b;
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Neural Social */
.neural-social {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
}

.social-neural {
  flex: 1;
  background: transparent;
  color: #cbd5e1;
  border: none;
  border-radius: 10px;
  padding: 12px 16px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  min-height: 46px;
  position: relative;
  overflow: hidden;
}

.social-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 10px;
  transition: all 0.2s ease;
}

.social-neural:hover .social-bg {
  background: rgba(30, 41, 59, 0.8);
  border-color: rgba(59, 130, 246, 0.4);
}

.social-neural span {
  position: relative;
  z-index: 2;
}

.social-neural svg {
  position: relative;
  z-index: 2;
}

.social-glow {
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  background: rgba(59, 130, 246, 0.2);
  border-radius: 11px;
  opacity: 0;
  filter: blur(4px);
  transition: opacity 0.2s ease;
  z-index: 0;
}

.social-neural:hover .social-glow {
  opacity: 1;
}

/* Signup Section */
.signup-section {
  text-align: center;
  font-size: 14px;
  color: #64748b;
}

.neural-signup {
  color: #3b82f6;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
  position: relative;
}

.neural-signup::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: #3b82f6;
  transition: width 0.3s ease;
}

.neural-signup:hover::after {
  width: 100%;
}

.neural-signup:hover {
  color: #60a5fa;
}

/* Error States */
.error-message {
  color: #ef4444;
  font-size: 12px;
  font-weight: 500;
  margin-top: 6px;
  opacity: 0;
  transform: translateY(-4px);
  transition: all 0.2s ease;
  position: relative;
  z-index: 5;
}

.error-message.show {
  opacity: 1;
  transform: translateY(0);
}

.smart-field.error .field-background {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

.smart-field.error label {
  color: #ef4444;
}

.smart-field.error .field-completion {
  background: #ef4444;
}

/* Success Neural */
.success-neural {
  display: none;
  text-align: center;
  padding: 40px 20px;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s ease;
}

.success-neural.show {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.success-core {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.success-rings {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.success-ring {
  position: absolute;
  border: 2px solid #10b981;
  border-radius: 50%;
  animation: successRing 1s ease-out forwards;
}

.success-ring:nth-child(1) {
  width: 60px;
  height: 60px;
  top: 10px;
  left: 10px;
  animation-delay: 0s;
}

.success-ring:nth-child(2) {
  width: 70px;
  height: 70px;
  top: 5px;
  left: 5px;
  animation-delay: 0.2s;
}

.success-ring:nth-child(3) {
  width: 80px;
  height: 80px;
  top: 0;
  left: 0;
  animation-delay: 0.4s;
}

@keyframes successRing {
  0% {
    opacity: 0;
    transform: scale(0);
  }
  50% {
    opacity: 1;
    transform: scale(1.1);
  }
  100% {
    opacity: 0.7;
    transform: scale(1);
  }
}

.success-core svg {
  color: #10b981;
  position: relative;
  z-index: 2;
  animation: successCheck 0.6s ease-out 0.6s forwards;
  opacity: 0;
}

@keyframes successCheck {
  0% {
    opacity: 0;
    transform: scale(0);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.success-neural h3 {
  color: #f8fafc;
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.success-neural p {
  color: #94a3b8;
  font-size: 14px;
}

/* Mobile Responsive */
@media (max-width: 480px) {
  body {
    padding: 16px;
  }

  .login-card {
    padding: 32px 24px;
    border-radius: 16px;
  }

  .login-header h1 {
    font-size: 1.5rem;
  }

  .ai-logo {
    width: 60px;
    height: 60px;
  }

  .ring-1 {
    width: 45px;
    height: 45px;
    top: 7.5px;
    left: 7.5px;
  }
  .ring-2 {
    width: 52px;
    height: 52px;
    top: 4px;
    left: 4px;
  }
  .ring-3 {
    width: 60px;
    height: 60px;
    top: 0;
    left: 0;
  }

  .form-options {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .neural-social {
    flex-direction: column;
  }
}