/* Authentication - Hero Landing Experience */
.auth-screen-container {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg,
    #0052FF 0%,
    #7C3AED 50%,
    #0891b2 100%
  );
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: var(--spacing-xl);
  position: relative;
  overflow: hidden;
}

/* Animated Background Elements */
.auth-screen-container::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: var(--radius-circle);
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent 70%);
  top: -250px;
  right: -250px;
  animation: float 20s ease-in-out infinite;
}

.auth-screen-container::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: var(--radius-circle);
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08), transparent 70%);
  bottom: -200px;
  left: -200px;
  animation: float 15s ease-in-out infinite reverse;
}

.auth-screen-container--active {
  display: flex;
}

.auth-screen {
  width: 100%;
  max-width: 480px;
  position: relative;
  z-index: 1;
}

/* Glass Card Design */
.auth-box {
  background-color: rgba(255, 255, 255, 0.98);
  border-radius: var(--radius-3xl);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.5);
  padding: var(--spacing-3xl);
  border: 1px solid rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  animation: authBoxFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes authBoxFadeIn {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (prefers-color-scheme: dark) {
  .auth-box {
    background-color: rgba(30, 41, 59, 0.98);
    border-color: rgba(255, 255, 255, 0.15);
  }
}

.auth__header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.auth__logo {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  animation: float 3s ease-in-out infinite;
}

.auth__logo-image {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  display: block;
  animation: float 3s ease-in-out infinite;
}

.auth__title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: var(--font-extrabold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.04em;
}

.auth__subtitle {
  color: var(--color-text-secondary);
  font-size: 1rem;
  font-weight: var(--font-normal);
  letter-spacing: -0.01em;
  line-height: 1.5;
}

/* Auth Tabs - Segmented Control */
.auth__tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: var(--spacing-2xl);
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-xl);
  padding: 0.375rem;
  border: 1px solid var(--color-border);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.08);
}

.auth__tab {
  flex: 1;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-lg);
  font-weight: var(--font-semibold);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-spring);
  letter-spacing: -0.01em;
  cursor: pointer;
  position: relative;
}

.auth__tab:hover {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.5);
}

.auth__tab--active {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.15);
  transform: scale(1.02);
}

/* Auth Form - Clean Inputs */
.auth__content {
  margin-bottom: var(--spacing-lg);
}

.auth-form .form-group {
  margin-bottom: var(--spacing-lg);
}

.auth-form .form-label {
  font-size: 0.9375rem;
  font-weight: var(--font-semibold);
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.auth-form .form-input {
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-base);
}

.auth-form .form-input:focus {
  transform: translateY(-1px);
  box-shadow: 0 0 0 3px var(--color-primary-subtle), var(--shadow-md);
}

.auth__error {
  padding: var(--spacing-md) var(--spacing-lg);
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid var(--color-error);
  border-radius: var(--radius-lg);
  color: var(--color-error);
  font-size: 0.875rem;
  font-weight: var(--font-medium);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: var(--shadow-sm);
  animation: errorShake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

@keyframes errorShake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
  20%, 40%, 60%, 80% { transform: translateX(4px); }
}

.auth__error::before {
  content: '⚠';
  font-size: 1.125rem;
}

/* Google Button - Premium Brand Design */
.btn--google {
  width: 100%;
  padding: 0.75rem 1.25rem;
  background-color: white;
  color: #1f2937;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-weight: var(--font-semibold);
  font-size: 0.9375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: all var(--transition-base);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  letter-spacing: -0.01em;
}

.btn--google:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--google:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.btn--google:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Divider - Elegant Separator */
.auth__divider {
  display: flex;
  align-items: center;
  margin: var(--spacing-xl) 0;
  color: var(--color-text-tertiary);
  font-size: 0.8125rem;
  font-weight: var(--font-medium);
}

.auth__divider::before,
.auth__divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

.auth__divider span {
  padding: 0 var(--spacing-lg);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Auth Footer */
.auth__footer {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border-light);
}

.auth__link {
  color: var(--color-primary);
  font-size: 0.9375rem;
  font-weight: var(--font-semibold);
  transition: opacity var(--transition-fast);
  letter-spacing: -0.01em;
  cursor: pointer;
}

.auth__link:hover {
  opacity: 0.7;
  text-decoration: underline;
}

/* User Profile Dropdown */
.user-profile {
  position: relative;
}

.user-profile__trigger {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  color: var(--color-text);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
}

.user-profile__trigger:hover {
  background-color: var(--color-bg-hover);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.user-profile__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  border: 1px solid var(--color-border);
}

.user-profile__avatar--placeholder {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: 0.875rem;
  letter-spacing: -0.01em;
  box-shadow: var(--shadow-sm);
}

.user-profile__name {
  font-weight: var(--font-medium);
  font-size: 0.9375rem;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.user-profile__dropdown-icon {
  font-size: 0.75rem;
  opacity: 0.6;
  transition: transform var(--transition-base);
}

.user-profile__trigger:hover .user-profile__dropdown-icon {
  transform: translateY(2px);
}

/* User Dropdown Menu */
.user-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 240px;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  z-index: var(--z-dropdown);
  animation: dropdownFadeIn 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes dropdownFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.user-dropdown__header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.user-dropdown__name {
  font-weight: var(--font-bold);
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 0.25rem;
  letter-spacing: -0.02em;
}

.user-dropdown__email {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: var(--font-normal);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-dropdown__divider {
  height: 1px;
  background-color: var(--color-border-light);
  margin: 0.5rem 0;
}

.user-dropdown__item {
  width: 100%;
  padding: 0.625rem 1rem;
  text-align: left;
  color: var(--color-text);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: var(--font-normal);
  font-size: 0.9375rem;
  letter-spacing: -0.01em;
  cursor: pointer;
}

.user-dropdown__item:hover {
  background-color: var(--color-bg-hover);
}

.user-dropdown__item:first-of-type {
  margin-top: 0.375rem;
}

.user-dropdown__item:last-of-type {
  margin-bottom: 0.375rem;
}

@media (max-width: 768px) {
  .auth-box {
    padding: var(--spacing-2xl);
  }

  .auth__title {
    font-size: 1.75rem;
  }

  .user-profile__name {
    display: none;
  }

  .user-profile__dropdown-icon {
    display: none;
  }

  .user-profile__trigger {
    padding: 0.5rem;
  }
}