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

body {
  font-family: var(--font-family-body);
  background-color: var(--primary-background);
  color: var(--primary-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1 {
  font-family: var(--font-family-headings);
  font-size: var(--display-large-size);
  font-weight: var(--display-large-weight);
  line-height: var(--display-large-height);
  color: var(--primary-text);
}

.theme-toggle {
  position: fixed;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 60px;
  height: 60px;
  border-radius: var(--border-radius-full);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background-color: var(--surface);
  color: var(--primary-text);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
  z-index: 1000;
  padding: 0;
}

.theme-toggle span {
  display: block;
  width: 100%;
  text-align: center;
  line-height: 1;
}

.theme-toggle:hover { transform: scale(1.1); }
.theme-toggle:active { transform: scale(0.95); }

.back-btn {
  position: fixed;
  top: 0;
  left: 0;
  width: 60px;
  height: 100vh;
  border-radius: 0;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 12px;
  font-size: 24px;
  background-color: var(--primary-background);
  color: var(--primary-text);
  box-shadow: 2px 0 10px rgba(0,0,0,0.1);
  transition: width 0.3s ease;
  z-index: 1000;
  text-decoration: none;
  border-right: 1px solid var(--alternate);
}

.back-btn:hover { width: 80px; }
.back-btn:active { opacity: 0.8; }

.container {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--spacing-xl);
  padding-top: calc(var(--spacing-xl) + 40px);
  padding-left: calc(var(--spacing-xl) + 70px);
}

.container.centered {
  align-items: center;
  padding-left: var(--spacing-xl);
}

.content {
  text-align: center;
  width: 100%;
  max-width: 900px;
}

footer {
  background-color: var(--surface);
  padding: var(--spacing-xl) var(--spacing-lg);
  border-top: 1px solid var(--alternate);
  position: relative;
  z-index: 1000;
}

.footer-content {
  max-width: 100%;
  padding: 0 var(--spacing-xl);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.footer-links-left {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links-right {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  position: absolute;
  right: 40px;
}

.footer-link {
  color: var(--secondary-text);
  text-decoration: none;
  font-size: var(--label-medium-size);
  font-weight: var(--label-medium-weight);
  transition: color var(--transition-base);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
}

.footer-link:hover {
  color: var(--primary-text);
  background-color: var(--alternate);
}

.footer-auth-btn {
  background-color: var(--primary-text);
  color: var(--primary-background);
  border: none;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  font-size: var(--label-medium-size);
  font-weight: var(--label-medium-weight);
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-family-body);
}

.footer-auth-btn:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

.auth-modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 10000;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  animation: fadeIn 0.3s ease;
}

.auth-modal-overlay.active { display: flex; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.auth-modal {
  background: var(--surface);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xxl);
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: slideUp 0.4s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.auth-modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--alternate);
  border: none;
  border-radius: 50%;
  color: var(--primary-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-modal-close:hover {
  background: var(--tertiary);
  transform: rotate(90deg);
}

.auth-modal-logo {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.auth-modal-logo img {
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.auth-modal-title {
  font-family: var(--font-family-headings);
  font-size: var(--headline-medium-size);
  font-weight: 600;
  color: var(--primary-text);
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.auth-modal-subtitle {
  font-size: var(--body-medium-size);
  color: var(--secondary-text);
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.auth-modal-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.auth-modal-form .form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.auth-modal-form .form-group label {
  font-size: var(--body-medium-size);
  font-weight: 500;
  color: var(--primary-text);
}

.auth-modal-form .form-group input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--alternate);
  border-radius: 25px;
  background: var(--primary-background);
  color: var(--primary-text);
  font-size: var(--body-medium-size);
  transition: all var(--transition-fast);
}

.auth-modal-form .form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.auth-modal-form .password-wrapper { position: relative; }
.auth-modal-form .password-wrapper input { padding-right: 48px; }

.auth-modal-form .password-toggle {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  padding: 0 var(--spacing-md);
  background: none;
  border: none;
  color: var(--secondary-text);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.auth-modal-form .password-toggle:hover { color: var(--primary-text); }

.auth-modal-form .btn-primary {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--secondary);
  color: var(--primary);
  border: none;
  border-radius: 25px;
  font-family: var(--font-family-headings);
  font-size: var(--label-large-size);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-modal-form .btn-primary:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.auth-modal-form .btn-primary:active { transform: translateY(0); }

.auth-modal-divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--secondary-text);
  margin: var(--spacing-md) 0;
}

.auth-modal-divider::before,
.auth-modal-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--tertiary);
}

.auth-modal-divider span { padding: 0 var(--spacing-md); }

.auth-modal-form .btn-google {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--primary-background);
  color: var(--primary-text);
  border: 1px solid var(--alternate);
  border-radius: 25px;
  font-family: var(--font-family-headings);
  font-size: var(--label-large-size);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-modal-form .btn-google:hover {
  background: var(--alternate);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.auth-modal-form .btn-google svg { flex-shrink: 0; }

.page-overlay {
  position: fixed;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100vh;
  background-color: var(--primary-background);
  z-index: 9999;
  animation: slideInFromLeft 0.5s ease-in-out forwards;
  overflow: hidden;
}

.page-overlay-bottom {
  position: fixed;
  top: 100%;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--primary-background);
  z-index: 9999;
  animation: slideInFromBottom 0.5s ease-in-out forwards;
  overflow: hidden;
}

.page-overlay iframe,
.page-overlay-bottom iframe {
  width: 100%;
  height: 100%;
  border: none;
}

@keyframes slideInFromLeft {
  from { left: -100%; }
  to { left: 0; }
}

@keyframes slideInFromBottom {
  from { top: 100%; }
  to { top: 0; }
}

body.page-transition { overflow: hidden; }

body.page-transition .back-btn {
  animation: slideButtonWithPage 0.5s ease-in-out forwards;
}

body.page-transition-bottom { overflow: hidden; }

body.page-transition-bottom footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  animation: slideFooterWithPage 0.5s ease-in-out forwards;
}

@keyframes slideButtonWithPage {
  from { left: 0; }
  to { left: 100%; }
}

@keyframes slideFooterWithPage {
  from { transform: translateY(0); }
  to { transform: translateY(-100vh); }
}

.btn-action {
  display: inline-block;
  padding: var(--spacing-lg) var(--spacing-xxxl);
  background-color: var(--secondary);
  color: var(--primary);
  text-decoration: none;
  border-radius: var(--border-radius-lg);
  font-size: var(--label-large-size);
  font-weight: 600;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  box-shadow: var(--shadow-md);
  border: none;
  cursor: pointer;
}

.btn-action:hover:not(:disabled) {
  transform: scale(1.05);
  opacity: 0.9;
}

.btn-action:active:not(:disabled) { transform: scale(0.98); }

.btn-action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  background-color: var(--alternate);
  color: var(--secondary-text);
}

.btn-action.danger {
  background-color: var(--error);
  color: var(--info);
}

.highlight-box {
  background-color: var(--surface);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  border-left: 4px solid var(--primary-text);
  margin-bottom: var(--spacing-lg);
}

.highlight-box ul {
  list-style: none;
  padding-left: 0;
  margin-top: var(--spacing-sm);
}

.highlight-box li {
  font-size: var(--body-medium-size);
  color: var(--secondary-text);
  line-height: var(--body-medium-height);
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-lg);
  position: relative;
}

.highlight-box li:before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--primary-text);
  font-weight: bold;
}

@media (max-width: 768px) {
  .footer-content {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .footer-links-left,
  .footer-links-right {
    flex-direction: column;
    width: 100%;
    align-items: center;
    position: static;
  }

  .container {
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + 40px);
    padding-left: calc(var(--spacing-md) + 70px);
  }

  .container.centered {
    padding-left: var(--spacing-md);
  }

  h1 { font-size: var(--display-medium-size); }

  .auth-modal {
    padding: var(--spacing-xl);
    max-width: 90%;
  }
}