/* =====================================================
   LOGIN PAGE STYLES
   Animated gradient background, glass card, auth form
   ===================================================== */

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
}

/* Force light/dark styles based on global theme variables */
.login-page {
  --text-primary: var(--text-primary);
  --text-secondary: var(--text-secondary);
  --text-muted: var(--text-muted);
  --surface: var(--surface);
  --surface-hover: var(--surface-hover);
  --border-light: var(--border-light);
  --border-medium: var(--border-medium);
  --primary-subtle: var(--primary-subtle);
}

/* ---------- Flat Theme Background ---------- */
.login-bg {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: -2;
}

/* ---------- Floating Orbs ---------- */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
  animation: float 8s ease-in-out infinite;
  z-index: -1;
  pointer-events: none;
}

.orb-1 {
  width: 420px;
  height: 420px;
  background: rgba(0, 102, 255, 0.08);
  top: -120px;
  right: -100px;
  animation-duration: 10s;
}

.orb-2 {
  width: 320px;
  height: 320px;
  background: rgba(0, 162, 255, 0.06);
  bottom: -80px;
  left: -60px;
  animation-duration: 12s;
  animation-delay: -3s;
}

.orb-3 {
  width: 260px;
  height: 260px;
  background: rgba(0, 102, 255, 0.04);
  top: 45%;
  left: 55%;
  animation-duration: 14s;
  animation-delay: -6s;
}

/* Floating Theme Toggle */
.floating-theme-toggle {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  background: var(--surface);
  padding: 0.5rem 0.75rem;
  border-radius: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.theme-switch {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.theme-icon {
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: opacity var(--transition-normal);
  user-select: none;
}

#theme-toggle {
  display: none;
}

.theme-switch-label {
  position: relative;
  width: 48px;
  height: 26px;
  background: var(--surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  padding: 0 3px;
}

.theme-switch-label:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

.theme-switch-label .switch-thumb {
  width: 20px;
  height: 20px;
  background: var(--primary);
  border-radius: 50%;
  transition: transform var(--transition-normal) cubic-bezier(0.68, -0.15, 0.27, 1.15);
  box-shadow: 0 2px 6px rgba(0, 50, 150, 0.15);
}

#theme-toggle:checked ~ .theme-switch-label .switch-thumb {
  transform: translateX(22px);
}

/* ---------- Login Card ---------- */
.login-card {
  width: 100%;
  max-width: 440px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-xl);
  box-shadow: var(--glass-shadow), var(--shadow-xl);
  animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

/* Top primary bar on card */
.login-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 3px;
  background: var(--primary);
  border-radius: 0 0 var(--radius-full) var(--radius-full);
}

/* ---------- Card Header ---------- */
.card-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.logo-icon {
  width: 96px;
  height: 96px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-size: 1.5rem;
  box-shadow: var(--shadow-sm);
  animation: floatLogo 4s ease-in-out infinite;
}

@keyframes floatLogo {
  0% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0); }
}

.card-title {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
}

.card-subtitle {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* ---------- Register Only Elements ---------- */
#auth-form[data-mode="login"] .register-only {
  display: none !important;
}

/* ---------- Auth Tabs ---------- */
.auth-tabs {
  display: flex;
  background: var(--tab-bg);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: var(--space-xl);
  position: relative;
}

.auth-tab {
  flex: 1;
  padding: 0.6rem;
  background: none;
  border: none;
  font-family: var(--font-family);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
  position: relative;
  z-index: 1;
}

.auth-tab.active {
  background: var(--tab-active);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.auth-tab:hover:not(.active) {
  color: var(--text-primary);
}

/* ---------- Auth Form ---------- */
.auth-form {
  opacity: 1;
  transition: opacity 0.2s ease;
}

.auth-form.switching {
  opacity: 0;
}

/* ---------- Submit Button (full width) ---------- */
.login-card .btn-primary {
  width: 100%;
  padding: 0.875rem;
  position: relative;
}

.btn-primary .submit-spinner {
  position: absolute;
  top: calc(50% - 10px);
  left: calc(50% - 10px);
  display: none;
}

/* ---------- Google Button ---------- */
.btn-google {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-google:hover {
  background: var(--surface-hover);
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-google:active {
  transform: scale(0.98);
}

.btn-google:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-google svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ---------- Footer Text ---------- */
.form-footer {
  margin-top: var(--space-lg);
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 480px) {
  .login-card {
    padding: var(--space-xl) var(--space-lg);
    border-radius: var(--radius-lg);
  }

  .card-title {
    font-size: 1.4rem;
  }

  .orb { filter: blur(60px); opacity: 0.3; }
}