/* ═══════════════════════════════════════════════════════════════
   Login Page - Standalone Authentication
   ═══════════════════════════════════════════════════════════════ */

/* === Page Layout === */
.login-page {
  display: flex;
  min-height: 100vh;
  background: var(--color-bg-page);
}

/* ═══════════════════════════════════════════════════════════════
   Left Brand Panel
   ═══════════════════════════════════════════════════════════════ */
.login-brand {
  flex: 1;
  position: relative;
  background: linear-gradient(135deg, var(--primary-6) 0%, var(--primary-8) 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-12);
  overflow: hidden;
  color: var(--color-white);
  min-height: 100vh;
}

/* Grid pattern overlay */
.login-brand::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

/* Large radial glow - top right */
.login-brand::after {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 65%);
  pointer-events: none;
}

/* === Decorative Geometric Shapes === */
.brand-shape {
  position: absolute;
  pointer-events: none;
}

.brand-shape--ring {
  bottom: 100px;
  right: 80px;
  width: 200px;
  height: 200px;
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  animation: brand-float 9s ease-in-out infinite;
}

.brand-shape--ring-small {
  bottom: 160px;
  right: 140px;
  width: 80px;
  height: 80px;
  border: 1.5px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  animation: brand-float 12s ease-in-out infinite reverse;
}

.brand-shape--circle {
  top: 220px;
  left: -50px;
  width: 140px;
  height: 140px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  animation: brand-float 10s ease-in-out infinite;
}

.brand-shape--circle-small {
  top: 340px;
  left: 60px;
  width: 24px;
  height: 24px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  animation: brand-float 7s ease-in-out infinite reverse;
}

.brand-shape--dots {
  bottom: 80px;
  left: 60px;
  width: 128px;
  height: 80px;
  background-image: radial-gradient(rgba(255, 255, 255, 0.18) 1.5px, transparent 1.5px);
  background-size: 16px 16px;
}

.brand-shape--line {
  bottom: 240px;
  right: 40px;
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
}

/* === Brand Content === */
.brand-content {
  position: relative;
  z-index: 2;
  max-width: 440px;
}

.brand-content > * {
  animation: brand-slide-in 0.6s ease backwards;
}
.brand-content > *:nth-child(1) { animation-delay: 0.1s; }
.brand-content > *:nth-child(2) { animation-delay: 0.2s; }
.brand-content > *:nth-child(3) { animation-delay: 0.3s; }
.brand-content > *:nth-child(4) { animation-delay: 0.4s; }

/* Logo 图标（右上角浮动） */
.brand-logo-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
}

.login-top-logo {
  position: fixed;
  top: 24px;
  right: 28px;
  z-index: 20;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.brand-logo-icon svg {
  width: 26px;
  height: 26px;
  color: var(--color-white);
}

.brand-logo-icon img {
  width: 30px;
  height: 30px;
  object-fit: contain;
  filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.3));
}

/* Title & Tagline */
.brand-title {
  font-size: 38px;
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.brand-tagline {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: var(--space-10);
  line-height: 1.6;
}

/* Feature List */
.brand-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.brand-feature {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-md);
  color: rgba(255, 255, 255, 0.85);
}

.brand-feature-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-feature-icon svg {
  width: 16px;
  height: 16px;
  color: rgba(255, 255, 255, 0.9);
}

/* ═══════════════════════════════════════════════════════════════
   Right Form Panel
   ═══════════════════════════════════════════════════════════════ */
.login-form-side {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  background: var(--color-bg-page);
}

.login-card {
  width: 100%;
  max-width: 400px;
  animation: card-slide-in 0.5s ease;
}

/* Form Header */
.login-header {
  margin-bottom: var(--space-8);
}

.login-title {
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-1);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.login-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-3);
  line-height: 1.5;
}

/* ═══════════════════════════════════════════════════════════════
   Login Form
   ═══════════════════════════════════════════════════════════════ */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* Field */
.login-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.login-field-label {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-2);
}

/* Input wrapper with icon */
.login-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.login-input-icon {
  position: absolute;
  left: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-3);
  pointer-events: none;
  transition: color 0.15s ease;
  z-index: 1;
}

.login-input-icon svg {
  width: 18px;
  height: 18px;
}

.login-input-wrapper:focus-within .login-input-icon {
  color: var(--color-primary);
}

/* Input */
.login-input {
  width: 100%;
  padding: var(--space-3) var(--space-3);
  padding-left: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  color: var(--color-text-1);
  background: var(--color-white);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  outline: none;
  font-family: inherit;
  line-height: var(--line-height-normal);
}

.login-input::placeholder {
  color: var(--color-text-placeholder);
}

.login-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(22, 100, 255, 0.12);
}

/* Password input - extra right padding for toggle */
.login-input--password {
  padding-right: 44px;
}

/* Password visibility toggle */
.password-toggle {
  position: absolute;
  right: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-3);
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background 0.15s ease;
  z-index: 1;
}

.password-toggle:hover {
  color: var(--color-text-2);
  background: var(--color-bg-hover);
}

.password-toggle svg {
  width: 18px;
  height: 18px;
}

.password-toggle .icon-eye-off {
  display: none;
}

.password-toggle.active .icon-eye {
  display: none;
}

.password-toggle.active .icon-eye-off {
  display: block;
}

/* ═══════════════════════════════════════════════════════════════
   Options Row (Remember me + Forgot password)
   ═══════════════════════════════════════════════════════════════ */
.login-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.login-checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  user-select: none;
}

.login-checkbox-wrapper input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  cursor: pointer;
  margin: 0;
  border-radius: var(--radius-sm);
}

.login-checkbox-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-2);
  cursor: pointer;
}

.login-forgot {
  font-size: var(--font-size-sm);
  color: var(--color-text-3);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
  transition: color 0.15s ease;
}

.login-forgot:hover {
  color: var(--color-primary);
}

/* ═══════════════════════════════════════════════════════════════
   Login Button
   ═══════════════════════════════════════════════════════════════ */
.login-btn {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: background 0.15s ease, box-shadow 0.2s ease, transform 0.08s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: inherit;
  position: relative;
  min-height: 46px;
  letter-spacing: 0.04em;
}

.login-btn:hover:not(:disabled) {
  background: var(--color-primary-hover);
  box-shadow: 0 4px 16px rgba(22, 100, 255, 0.28);
}

.login-btn:active:not(:disabled) {
  background: var(--color-primary-click);
  transform: scale(0.985);
}

.login-btn:disabled {
  background: var(--color-primary-disabled);
  cursor: not-allowed;
}

.login-btn-text {
  transition: opacity 0.15s ease;
}

.login-btn.loading .login-btn-text {
  opacity: 0;
}

.login-btn-spinner {
  display: none;
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--color-white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.login-btn.loading .login-btn-spinner {
  display: block;
}

/* ═══════════════════════════════════════════════════════════════
   Error Message Area
   ═══════════════════════════════════════════════════════════════ */
.login-error {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-danger-bg);
  border: 1px solid var(--danger-3);
  border-radius: var(--radius-md);
  color: var(--color-danger);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.login-error.show {
  display: flex;
  animation: error-shake 0.35s ease;
}

.login-error svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════
   Animations
   ═══════════════════════════════════════════════════════════════ */
@keyframes brand-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

@keyframes brand-slide-in {
  from { opacity: 0; transform: translateX(-24px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes card-slide-in {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes error-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-5px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(3px); }
}

/* ═══════════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 968px) {
  .login-brand {
    display: none;
  }

  .login-form-side {
    flex: 1;
  }
}

@media (max-width: 480px) {
  .login-form-side {
    padding: var(--space-4);
  }

  .login-title {
    font-size: 24px;
  }

  .login-subtitle {
    font-size: var(--font-size-md);
  }
}