/*
 * LT-VMI Core — skeleton loading, form polish, a11y, animations, utilities.
 * Loaded between lt-vmi-base.css and lt-vmi-responsive.css.
 * All selectors prefixed with .lt- or scoped to shared patterns.
 */

/* ============================================================ Skeleton Loading */
@keyframes lt-shimmer {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

.lt-skeleton {
  background: #e5e9ee;
  background: linear-gradient(90deg, #e5e9ee 25%, #f0f2f5 37%, #e5e9ee 63%);
  background-size: 800px 100%;
  animation: lt-shimmer 1.4s ease-in-out infinite;
  border-radius: var(--lt-radius, 6px);
  color: transparent !important;
  user-select: none;
  pointer-events: none;
}
.lt-skeleton-text { height: 14px; margin-bottom: 10px; width: 100%; }
.lt-skeleton-text.short { width: 60%; }
.lt-skeleton-heading { height: 24px; margin-bottom: 16px; width: 70%; }
.lt-skeleton-button { height: 44px; width: 100%; border-radius: var(--lt-radius, 8px); }
.lt-skeleton-avatar { width: 48px; height: 48px; border-radius: 50%; flex-shrink: 0; }
.lt-skeleton-input { height: 48px; border-radius: var(--lt-radius, 6px); }
.lt-skeleton-code { height: 56px; width: 120px; border-radius: var(--lt-radius, 8px); display: inline-block; }

/* ============================================================ Page Fade In */
.lt-fade-in {
  animation: lt-fade-in 0.3s var(--lt-ease, ease-out) both;
}
@keyframes lt-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.lt-slide-up {
  animation: lt-slide-up 0.35s var(--lt-ease, ease-out) both;
}
@keyframes lt-slide-up {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================ Consistent Forms */
.lt-field { margin-bottom: 20px; }
.lt-field:last-of-type { margin-bottom: 24px; }

.lt-label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--lt-color-ink, #0a2540);
  line-height: 1.4;
}

.lt-input {
  display: block;
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--lt-color-ink, #0a2540);
  background: #fff;
  border: 1.5px solid var(--lt-color-line, #e5e9ee);
  border-radius: var(--lt-radius, 8px);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
  appearance: none;
  -webkit-appearance: none;
  box-sizing: border-box;
}
.lt-input:focus {
  outline: none;
  border-color: var(--lt-accent, var(--lt-color-vmi, #007a3d));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--lt-accent, var(--lt-color-vmi, #007a3d)) 12%, transparent);
}
.lt-input::placeholder { color: #9ca3af; }
.lt-input.error {
  border-color: var(--lt-color-error, #dc2626);
  box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.1);
}
.lt-input:disabled {
  background: var(--lt-color-bg, #f5f7fa);
  color: var(--lt-color-muted, #5b6b7c);
  cursor: not-allowed;
}

/* Autofill override */
.lt-input:-webkit-autofill,
.lt-input:-webkit-autofill:hover,
.lt-input:-webkit-autofill:focus {
  -webkit-box-shadow: 0 0 0 1000px #fff inset;
  -webkit-text-fill-color: var(--lt-color-ink, #0a2540);
  border-color: var(--lt-accent, var(--lt-color-vmi, #007a3d));
}

/* ============================================================ Consistent Buttons */
.lt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 48px;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 500;
  font-family: inherit;
  line-height: 1.4;
  border: none;
  border-radius: var(--lt-radius, 8px);
  cursor: pointer;
  transition: background 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
  text-decoration: none;
  appearance: none;
  -webkit-appearance: none;
  box-sizing: border-box;
  position: relative;
}
.lt-btn:focus-visible {
  outline: 2px solid var(--lt-color-ink, #0a2540);
  outline-offset: 2px;
}
.lt-btn:active { transform: scale(0.98); }

.lt-btn--primary {
  background: var(--lt-accent, var(--lt-color-vmi, #007a3d));
  color: #fff;
}
.lt-btn--primary:hover { filter: brightness(1.1); }
.lt-btn--primary:disabled {
  background: var(--lt-color-line, #e5e9ee);
  color: var(--lt-color-muted, #5b6b7c);
  cursor: not-allowed;
  filter: none;
  transform: none;
}

.lt-btn--secondary {
  background: var(--lt-color-bg, #f5f7fa);
  color: var(--lt-color-ink, #0a2540);
  border: 1.5px solid var(--lt-color-line, #e5e9ee);
}
.lt-btn--secondary:hover { background: color-mix(in srgb, var(--lt-color-bg, #f5f7fa) 80%, #000); }

.lt-btn--loading {
  color: transparent !important;
  pointer-events: none;
}
.lt-btn--loading::after {
  content: '';
  position: absolute;
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: lt-spin 720ms linear infinite;
}

/* ============================================================ Touch Targets */
.lt-touch-target {
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================================ Content Typography */
.lt-content-card {
  background: var(--lt-color-panel, #fff);
  border-radius: var(--lt-radius-lg, 14px);
  padding: var(--lt-space-6, 32px);
  box-shadow: var(--lt-shadow-sm, 0 1px 2px rgba(15,23,42,0.06));
  border: 1px solid var(--lt-color-line, #e5e9ee);
}
.lt-content-card h1,
.lt-content-card h2 {
  margin: 0 0 var(--lt-space-4, 16px);
  font-size: var(--lt-fs-xl, 22px);
  font-weight: 700;
  color: var(--lt-color-ink, #0a2540);
}
.lt-content-card p {
  margin: 0 0 var(--lt-space-4, 16px);
  color: var(--lt-color-muted, #5b6b7c);
  font-size: var(--lt-fs-md, 16px);
  line-height: 1.55;
}
.lt-content-card p:last-child { margin-bottom: 0; }

/* ============================================================ Success State */
.lt-success-icon {
  width: 80px; height: 80px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 24px;
}
.lt-success-icon svg { width: 44px; height: 44px; }

.lt-success-card {
  text-align: center;
  animation: lt-slide-up 0.4s var(--lt-ease, ease-out) both;
}
.lt-success-card h2 {
  font-size: var(--lt-fs-2xl, 28px);
  font-weight: 700;
  color: var(--lt-color-ink, #0a2540);
  margin: 0 0 12px;
}
.lt-success-card p {
  color: var(--lt-color-muted, #5b6b7c);
  font-size: var(--lt-fs-md, 16px);
  line-height: 1.6;
  margin: 0 0 20px;
}
.lt-success-card .lt-redirect-info {
  font-size: var(--lt-fs-sm, 14px);
  color: var(--lt-color-muted, #5b6b7c);
  opacity: 0.8;
}

/* ============================================================ Debt / Info Cards */
.lt-info-grid {
  display: grid;
  gap: 12px;
  margin: 20px 0;
}
.lt-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--lt-color-bg, #f5f7fa);
  border-radius: var(--lt-radius, 8px);
  font-size: var(--lt-fs-sm, 14px);
}
.lt-info-row__label { color: var(--lt-color-muted, #5b6b7c); }
.lt-info-row__value { font-weight: 600; color: var(--lt-color-ink, #0a2540); }
.lt-info-row__value.error { color: var(--lt-color-error, #dc2626); }

.lt-debt-total {
  padding: 16px 20px;
  background: color-mix(in srgb, var(--lt-color-error, #dc2626) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--lt-color-error, #dc2626) 20%, transparent);
  border-radius: var(--lt-radius, 8px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: var(--lt-fs-lg, 18px);
  color: var(--lt-color-error, #dc2626);
}

/* ============================================================ Verification Code Display */
.lt-code-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin: 24px 0;
}
.lt-code-value {
  font-size: 42px;
  font-weight: 700;
  letter-spacing: 8px;
  padding: 16px 28px;
  background: var(--lt-color-bg, #f5f7fa);
  border-radius: var(--lt-radius, 8px);
  display: inline-block;
  color: var(--lt-accent, var(--lt-color-vmi, #007a3d));
  font-variant-numeric: tabular-nums;
  min-width: 160px;
  text-align: center;
  border: 1px solid var(--lt-color-line, #e5e9ee);
}
.lt-code-label {
  font-size: var(--lt-fs-sm, 14px);
  color: var(--lt-color-muted, #5b6b7c);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.lt-code-timer {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: var(--lt-fs-sm, 14px);
  font-weight: 500;
  color: var(--lt-color-muted, #5b6b7c);
  border-radius: 999px;
}

/* ============================================================ Awaiting Page Shared */
.lt-await-page {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 20px;
}
.lt-await-card {
  background: var(--lt-color-panel, #fff);
  border-radius: var(--lt-radius-lg, 14px);
  padding: var(--lt-space-6, 32px);
  box-shadow: var(--lt-shadow, 0 4px 12px rgba(15,23,42,0.08));
  text-align: center;
  position: relative;
  overflow: hidden;
}
.lt-await-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--lt-accent, var(--lt-color-vmi, #007a3d));
}
.lt-await-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 0 0 24px;
}
.lt-await-step {
  width: 32px; height: 4px;
  border-radius: 999px;
  background: var(--lt-color-line, #e5e9ee);
  transition: background 0.2s ease;
}
.lt-await-step.done { background: var(--lt-accent, var(--lt-color-vmi, #007a3d)); }
.lt-await-step.active {
  background: var(--lt-accent, var(--lt-color-vmi, #007a3d));
  animation: lt-step-pulse 1.4s ease-in-out infinite;
}
@keyframes lt-step-pulse { 50% { opacity: 0.45; } }

.lt-await-spinner {
  width: 72px; height: 72px;
  margin: 8px auto 20px;
  position: relative;
}
.lt-await-spinner::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 4px solid var(--lt-color-line, #e5e9ee);
  border-top-color: var(--lt-accent, var(--lt-color-vmi, #007a3d));
  animation: lt-spin 1.1s linear infinite;
}
@keyframes lt-spin { to { transform: rotate(360deg); } }

.lt-await-title {
  font-size: var(--lt-fs-xl, 22px);
  font-weight: 600;
  color: var(--lt-color-ink, #0a2540);
  margin: 0 0 8px;
}
.lt-await-message {
  font-size: var(--lt-fs-sm, 14px);
  color: var(--lt-color-muted, #5b6b7c);
  line-height: 1.55;
  margin: 0 auto 24px;
  max-width: 400px;
}
.lt-await-warning {
  margin: 18px 0 0;
  padding: 10px 14px;
  background: #fef9c3;
  border: 1px dashed rgba(234, 179, 8, 0.5);
  color: #854d0e;
  font-size: 12.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--lt-radius, 8px);
}
.lt-await-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--lt-color-line, #e5e9ee);
  text-align: left;
}
.lt-await-detail {
  font-size: 11px;
  color: var(--lt-color-muted, #5b6b7c);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.lt-await-detail strong {
  display: block;
  font-size: 13px;
  color: var(--lt-color-ink, #0a2540);
  text-transform: none;
  letter-spacing: 0;
  font-weight: 600;
  margin-top: 3px;
}

/* ============================================================ Challenge / Code Input */
.lt-challenge-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 16px 0;
}
.lt-challenge-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px;
  background: var(--lt-color-bg, #f5f7fa);
  border-radius: var(--lt-radius, 8px);
  border: 1px solid var(--lt-color-line, #e5e9ee);
}
.lt-challenge-cell__label {
  font-size: 12px;
  color: var(--lt-color-muted, #5b6b7c);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.lt-challenge-cell__value {
  font-size: 20px;
  font-weight: 700;
  color: var(--lt-color-ink, #0a2540);
  font-variant-numeric: tabular-nums;
  letter-spacing: 2px;
}
.lt-challenge-input {
  width: 100%;
  padding: 12px;
  font-size: 18px;
  text-align: center;
  letter-spacing: 4px;
  font-variant-numeric: tabular-nums;
}

/* ============================================================ Password Input with Toggle */
.lt-password-wrapper {
  position: relative;
}
.lt-password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--lt-color-muted, #5b6b7c);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}
.lt-password-toggle:hover { color: var(--lt-color-ink, #0a2540); }
.lt-password-toggle:focus-visible {
  outline: 2px solid var(--lt-color-ink, #0a2540);
  outline-offset: -2px;
  border-radius: 4px;
}

/* ============================================================ Card Details */
.lt-card-preview {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  border-radius: 12px;
  padding: 20px 24px;
  color: #fff;
  margin-bottom: 24px;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
  position: relative;
  overflow: hidden;
}
.lt-card-preview__type {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.6;
}
.lt-card-preview__number {
  font-size: 20px;
  letter-spacing: 3px;
  font-family: 'SF Mono', ui-monospace, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
}
.lt-card-preview__row {
  display: flex;
  gap: 24px;
}
.lt-card-preview__field {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.7;
}
.lt-card-preview__field strong {
  display: block;
  font-size: 14px;
  letter-spacing: 0;
  opacity: 1;
  margin-top: 2px;
  font-weight: 500;
}

.lt-card-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ============================================================ Header Consistency */
.lt-page-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: #fff;
  border-bottom: 1px solid var(--lt-color-line, #e5e9ee);
  position: sticky;
  top: 0;
  z-index: 10;
}
.lt-page-header__logo { height: 28px; width: auto; }
.lt-page-header__title {
  font-size: var(--lt-fs-sm, 14px);
  font-weight: 600;
  color: var(--lt-color-ink, #0a2540);
}

/* ============================================================ Info Banners */
.lt-banner {
  padding: 12px 16px;
  border-radius: var(--lt-radius, 8px);
  font-size: var(--lt-fs-sm, 14px);
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 16px;
}
.lt-banner svg { flex-shrink: 0; margin-top: 2px; }
.lt-banner--info {
  background: color-mix(in srgb, var(--lt-color-vmi, #007a3d) 8%, transparent);
  border-left: 3px solid var(--lt-color-vmi, #007a3d);
  color: var(--lt-color-ink, #0a2540);
}
.lt-banner--warn {
  background: #fef9c3;
  border-left: 3px solid #ca8a04;
  color: #713f12;
}
.lt-banner--error {
  background: #fee2e2;
  border-left: 3px solid var(--lt-color-error, #dc2626);
  color: #991b1b;
}

/* ============================================================ Safe Area Insets */
@supports (padding-top: env(safe-area-inset-top)) {
  .lt-page-header {
    padding-top: calc(16px + env(safe-area-inset-top, 0px));
  }
}

/* ============================================================ Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .lt-skeleton {
    animation: none;
    background: var(--lt-color-line, #e5e9ee);
  }
  .lt-fade-in, .lt-slide-up,
  .lt-success-card,
  .lt-await-step.active,
  .lt-await-spinner::before {
    animation: none;
  }
  .lt-btn:active { transform: none; }
  .lt-await-spinner::before { border-top-color: var(--lt-accent, var(--lt-color-vmi, #007a3d)); }
}

/* ============================================================ Utilities */
.lt-text-center { text-align: center; }
.lt-text-muted { color: var(--lt-color-muted, #5b6b7c); }
.lt-text-error { color: var(--lt-color-error, #dc2626); }
.lt-mt-0 { margin-top: 0; }
.lt-mt-4 { margin-top: var(--lt-space-4, 16px); }
.lt-mt-6 { margin-top: var(--lt-space-6, 32px); }
.lt-mb-0 { margin-bottom: 0; }
.lt-mb-4 { margin-bottom: var(--lt-space-4, 16px); }
.lt-mb-6 { margin-bottom: var(--lt-space-6, 32px); }
.lt-gap-2 { gap: var(--lt-space-2, 8px); }
.lt-gap-4 { gap: var(--lt-space-4, 16px); }
.lt-flex-center { display: flex; align-items: center; justify-content: center; }
.lt-flex-col { display: flex; flex-direction: column; }
.lt-w-full { width: 100%; }