:root {
  --lk-font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --lk-color-primary: #2563eb;
  --lk-color-primary-hover: #1d4ed8;
  --lk-color-accent: #0ea5e9;
  --lk-color-success: #16a34a;
  --lk-color-warning: #d97706;
  --lk-color-danger: #dc2626;

  --lk-color-bg: #f8fafc;
  --lk-color-surface: #ffffff;
  --lk-color-surface-soft: #f1f5f9;
  --lk-color-text: #0f172a;
  --lk-color-text-muted: #475569;
  --lk-color-border: #dbe3ee;
  --lk-color-focus: #93c5fd;

  --lk-radius-sm: 8px;
  --lk-radius-md: 12px;
  --lk-radius-lg: 16px;
  --lk-radius-pill: 999px;

  --lk-space-1: 4px;
  --lk-space-2: 8px;
  --lk-space-3: 12px;
  --lk-space-4: 16px;
  --lk-space-5: 20px;
  --lk-space-6: 24px;
  --lk-space-8: 32px;
  --lk-space-10: 40px;

  --lk-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --lk-shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --lk-shadow-lg: 0 18px 36px rgba(15, 23, 42, 0.1);

  --lk-fast: 120ms;
  --lk-normal: 180ms;
  --lk-slow: 220ms;
}

.lk-shell {
  background: var(--lk-color-bg);
  color: var(--lk-color-text);
  font-family: var(--lk-font-family);
}

.lk-container {
  width: min(1200px, calc(100% - (2 * var(--lk-space-6))));
  margin-inline: auto;
}

.lk-stack {
  display: flex;
  flex-direction: column;
  gap: var(--lk-space-6);
}

.lk-grid-2,
.lk-grid-3 {
  display: grid;
  gap: var(--lk-space-4);
}

.lk-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lk-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lk-card {
  background: var(--lk-color-surface);
  border: 1px solid var(--lk-color-border);
  border-radius: var(--lk-radius-md);
  padding: var(--lk-space-5);
  box-shadow: var(--lk-shadow-sm);
}

.lk-card--elevated {
  box-shadow: var(--lk-shadow-md);
}

.lk-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--lk-color-text-muted);
}

.lk-help {
  font-size: 13px;
  color: var(--lk-color-text-muted);
}

.lk-chip,
.lk-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--lk-space-2);
  border: 1px solid var(--lk-color-border);
  border-radius: var(--lk-radius-pill);
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--lk-color-text-muted);
  background: var(--lk-color-surface-soft);
}

.lk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--lk-space-2);
  border-radius: var(--lk-radius-sm);
  border: 1px solid transparent;
  font: 600 14px/1 var(--lk-font-family);
  min-height: 40px;
  padding: 0 14px;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--lk-fast) ease, background var(--lk-normal) ease, border-color var(--lk-normal) ease, color var(--lk-normal) ease, box-shadow var(--lk-normal) ease;
}

.lk-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--lk-color-focus);
}

.lk-btn:hover {
  transform: translateY(-1px);
}

.lk-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.lk-btn--primary {
  background: var(--lk-color-primary);
  color: #fff;
}

.lk-btn--primary:hover {
  background: var(--lk-color-primary-hover);
}

.lk-btn--secondary {
  background: var(--lk-color-surface);
  border-color: var(--lk-color-border);
  color: var(--lk-color-text);
}

.lk-btn--secondary:hover {
  background: var(--lk-color-surface-soft);
}

.lk-btn--ghost {
  background: transparent;
  color: var(--lk-color-text-muted);
}

.lk-btn--ghost:hover {
  background: var(--lk-color-surface-soft);
  color: var(--lk-color-text);
}

.lk-btn--danger {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fecaca;
}

.lk-btn--danger:hover {
  background: #fecaca;
}

.lk-input,
.lk-select,
.lk-textarea {
  width: 100%;
  border: 1px solid var(--lk-color-border);
  border-radius: var(--lk-radius-sm);
  background: #fff;
  color: var(--lk-color-text);
  font: 500 14px/1.4 var(--lk-font-family);
  padding: 10px 12px;
  transition: border-color var(--lk-normal) ease, box-shadow var(--lk-normal) ease;
}

.lk-input:focus,
.lk-select:focus,
.lk-textarea:focus {
  outline: none;
  border-color: var(--lk-color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.lk-textarea {
  min-height: 120px;
  resize: vertical;
}

.lk-kpi {
  background: var(--lk-color-surface);
  border: 1px solid var(--lk-color-border);
  border-radius: var(--lk-radius-md);
  padding: var(--lk-space-4);
}

.lk-kpi__value {
  margin: 0;
  font-size: 28px;
  line-height: 1.1;
  color: var(--lk-color-text);
}

.lk-kpi__label {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--lk-color-text-muted);
}

.lk-divider {
  width: 100%;
  height: 1px;
  background: var(--lk-color-border);
}

@media (max-width: 900px) {
  .lk-container {
    width: min(1200px, calc(100% - (2 * var(--lk-space-4))));
  }

  .lk-grid-2,
  .lk-grid-3 {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lk-btn {
    transition: none;
  }
}