:root {
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #4338ca;
  --success: #10b981;
  --success-dark: #059669;
  --danger: #f43f5e;
  --warning: #f59e0b;
  --info: #3b82f6;
  --light: #f8fafc;
  --dark: #0f172a;
  --gray: #64748b;
  --gray-light: #e2e8f0;
  --border-radius: 16px;
  --box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-color: #f1f5f9;
  --text-color: #1e293b;
  --card-bg: rgba(255, 255, 255, 0.8);
  --card-border: rgba(226, 232, 240, 0.8);
  --input-bg: #ffffff;
  --input-border: #e2e8f0;
  --muted-text: #64748b;
  --toast-bg: #ffffff;
  --toast-color: #1e293b;
}

[data-theme="dark"] {
  --bg-color: #0f172a;
  --text-color: #f1f5f9;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(51, 65, 85, 0.8);
  --input-bg: #1e293b;
  --input-border: #334155;
  --muted-text: #94a3b8;
  --primary: #818cf8;
  --primary-light: #a5b4fc;
  --primary-dark: #6366f1;
  --gray-light: #1e293b;
  --dark: #f8fafc;
  --toast-bg: #1e293b;
  --toast-color: #f1f5f9;
}

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

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height:1.6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 500px;
  width: 100%;
  margin: 0 auto;
  padding: 40px;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--border-radius);
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--card-border);
  transition: var(--transition);
}

.container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--primary), var(--success));
}

h2 {
  text-align: center;
  color: var(--primary-dark);
  margin-bottom: 30px;
  font-weight: 600;
  font-size: 28px;
}

.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  max-width: 350px;
  width: 100%;
}

.toast {
  padding: 15px 20px;
  border-radius: var(--border-radius);
  margin-bottom: 15px;
  font-size: 0.9em;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--box-shadow);
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  background-color: var(--toast-bg);
  color: var(--toast-color);
  border: 1px solid var(--card-border);
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

.toast::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.5);
  animation: progress 3s linear forwards;
}

@keyframes progress {
  100% {
    width: 0;
  }
}

.toast-success {
  background-color: var(--success-dark);
  color: white;
}

.toast-error {
  background-color: var(--danger);
  color: white;
}

.toast-icon {
  font-size: 1.2em;
}

.toast-close {
  margin-left: auto;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s ease;
  color: var(--text-color);
}

.toast-close:hover {
  opacity: 1;
}

.form-group {
  margin-bottom: 25px;
  position: relative;
}

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

.input-wrapper {
  position: relative;
}

input {
  width: 100%;
  padding: 14px 45px;
  border: 2px solid var(--input-border);
  border-radius: var(--border-radius);
  font-size: 15px;
  transition: var(--transition);
  background-color: var(--input-bg);
  color: var(--text-color);
}

input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.input-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted-text);
}

.btn {
  display: block;
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 10px;
  box-shadow: 0 4px 6px rgba(99, 102, 241, 0.2);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--card-shadow);
  filter: brightness(1.1);
}

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

.form-footer {
  text-align: center;
  margin-top: 25px;
  font-size: 0.9em;
  color: var(--muted-text);
}

.form-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.form-footer a:hover {
  color: var(--primary-light);
  text-decoration: underline;
}

.loading-spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  border-top-color: var(--primary);
  animation: spin 1s ease-in-out infinite;
}

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

.password-toggle {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted-text);
  cursor: pointer;
  transition: color 0.3s ease;
}

.theme-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  border: none;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  transform: scale(1.1);
}

.theme-toggle i {
  font-size: 20px;
}

@media (max-width: 576px) {
  .container {
    padding: 30px 20px;
  }

  h2 {
    font-size: 24px;
    margin-bottom: 20px;
  }

  input {
    padding: 12px 45px;
  }

  .toast-container {
    max-width: calc(100% - 40px);
    top: 10px;
    right: 10px;
  }
}

/* Toggle Switch Styles */
.toggle-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.toggle-switch-container {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  margin-bottom: 0; /* Reset label margin */
}

.toggle-switch-container input {
  opacity: 0;
  width: 0;
  height: 0;
  padding: 0;
  border: none;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--gray-light);
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

input:checked + .slider {
  background-color: var(--primary);
}

input:focus + .slider {
  box-shadow: 0 0 1px var(--primary);
}

input:checked + .slider:before {
  transform: translateX(20px);
}

.slider.round {
  border-radius: 24px;
}

.slider.round:before {
  border-radius: 50%;
}

.toggle-label-text {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-color);
  cursor: pointer;
}

/* Register Page Styles */
.feedback {
    font-size: 0.85em;
    margin-top: 8px;
    padding-left: 5px;
    display: flex;
    align-items: center;
    gap: 5px;
}
.feedback.error { color: var(--danger); }
.feedback.success { color: var(--success-dark); }
.feedback.warning { color: var(--warning); }

.password-strength {
    margin-top: 15px;
    height: 6px;
    background-color: var(--gray-light);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}
.strength-meter {
    height: 100%;
    width: 0;
    transition: var(--transition);
    position: absolute;
    left: 0;
    top: 0;
}
.password-hints {
    margin-top: 15px;
    font-size: 0.8em;
    color: var(--muted-text);
    background: var(--card-bg);
    padding: 12px;
    border-radius: var(--border-radius);
    border: 1px solid var(--card-border);
}
.password-hints ul { padding-left: 20px; list-style-type: none; }
.password-hints li { margin-bottom: 5px; position: relative; padding-left: 25px; }
.password-hints li::before {
    content: '\f00d';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--danger);
}
.password-hints li.valid::before {
    content: '\f00c';
    color: var(--success-dark);
}
.domain-info {
    font-size: 0.8em;
    color: var(--muted-text);
    margin-top: 5px;
    background: var(--card-bg);
    padding: 8px;
    border-radius: 4px;
    border: 1px solid var(--card-border);
}
.error-input { border-color: var(--danger) !important; }
.success-input { border-color: var(--success) !important; }

/* Step Indicator */
.step-indicator {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}
.step {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-light);
    color: var(--muted-text);
    font-weight: 600;
    margin: 0 10px;
    position: relative;
    transition: var(--transition);
}
.step.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}
.step.completed {
    background: var(--success);
    color: white;
}
.step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 100%;
    width: 20px;
    height: 2px;
    background: var(--gray-light);
    transform: translateY(-50%);
    z-index: -1;
}
.step.completed:not(:last-child)::after {
    background: var(--success);
}

/* OTP Input */
.otp-input {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    margin: 1.5rem 0;
}
.otp-input input {
    width: 45px;
    height: 50px;
    text-align: center;
    font-size: 1.2rem;
    font-weight: bold;
    padding: 0;
    border-radius: 8px;
}

/* Utility classes for consistency */
.text-center { text-align: center; }
.mb-3 { margin-bottom: 1rem; }
.mt-3 { margin-top: 1rem; }
.d-grid { display: grid; }
.gap-2 { gap: 0.5rem; }
.small-text { font-size: 0.85em; color: var(--muted-text); }