/*
 * InvoiceCraftly Design Foundations v1.0
 * Feature 74 — launch-critical visual system baseline.
 *
 * This file is intentionally additive. Existing page styles can adopt these
 * tokens and primitives incrementally without a broad CSS rewrite.
 */

:root {
  /* Typography families */
  --ic-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ic-font-serif: 'Fraunces', Georgia, serif;
  --ic-font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  /* Typography weights: keep the active interface to three practical levels. */
  --ic-weight-regular: 400;
  --ic-weight-medium: 500;
  --ic-weight-semibold: 600;

  /* Type scale */
  --ic-text-xs: 0.75rem;
  --ic-text-sm: 0.875rem;
  --ic-text-base: 1rem;
  --ic-text-lg: 1.125rem;
  --ic-text-xl: 1.375rem;
  --ic-text-2xl: clamp(1.75rem, 3vw, 2.5rem);
  --ic-text-display: clamp(2.35rem, 6vw, 4.75rem);

  --ic-leading-tight: 1.15;
  --ic-leading-heading: 1.25;
  --ic-leading-body: 1.65;
  --ic-leading-ui: 1.35;

  /* Spacing scale */
  --ic-space-1: 0.25rem;
  --ic-space-2: 0.5rem;
  --ic-space-3: 0.75rem;
  --ic-space-4: 1rem;
  --ic-space-5: 1.25rem;
  --ic-space-6: 1.5rem;
  --ic-space-8: 2rem;
  --ic-space-10: 2.5rem;
  --ic-space-12: 3rem;
  --ic-space-16: 4rem;
  --ic-space-20: 5rem;

  /* Semantic colours mapped to the existing InvoiceCraftly palette */
  --ic-color-text: var(--ic-ink, #1a2b44);
  --ic-color-text-muted: var(--ic-ink-soft, #3b4b63);
  --ic-color-canvas: var(--ic-paper, #f2efe6);
  --ic-color-surface: var(--ic-paper-raised, #fbfaf6);
  --ic-color-border: var(--ic-line, rgba(26, 43, 68, 0.14));
  --ic-color-action: var(--ic-stamp, #b23b3b);
  --ic-color-action-hover: var(--ic-stamp-dark, #8e2e2e);
  --ic-color-success: var(--ic-sage, #5c7a6b);
  --ic-color-warning: var(--ic-gold, #c99a3d);
  --ic-color-danger: var(--ic-danger, #a6432e);

  /* Shape and elevation */
  --ic-radius-control: 0.625rem;
  --ic-radius-card: 0.875rem;
  --ic-radius-panel: 1.125rem;
  --ic-radius-pill: 999px;

  --ic-shadow-subtle: 0 1px 2px rgba(9, 19, 34, 0.05);
  --ic-shadow-raised: 0 10px 28px rgba(9, 19, 34, 0.09);
  --ic-shadow-overlay: 0 18px 48px rgba(9, 19, 34, 0.16);

  /* Layout and motion */
  --ic-reading-width: 68ch;
  --ic-content-width: 72rem;
  --ic-control-height: 2.75rem;
  --ic-focus-ring: 0 0 0 3px rgba(178, 59, 59, 0.22);
  --ic-motion-fast: 120ms ease;
  --ic-motion-standard: 180ms ease;
}

/* Typography primitives */
.ic-display,
.ic-heading-1,
.ic-heading-2,
.ic-heading-3 {
  margin-block: 0;
  color: var(--ic-color-text);
  text-wrap: balance;
}

.ic-display {
  font-family: var(--ic-font-serif);
  font-size: var(--ic-text-display);
  font-weight: var(--ic-weight-semibold);
  line-height: var(--ic-leading-tight);
  letter-spacing: -0.035em;
}

.ic-heading-1 {
  font-family: var(--ic-font-serif);
  font-size: var(--ic-text-2xl);
  font-weight: var(--ic-weight-semibold);
  line-height: var(--ic-leading-heading);
  letter-spacing: -0.025em;
}

.ic-heading-2 {
  font-family: var(--ic-font-sans);
  font-size: var(--ic-text-xl);
  font-weight: var(--ic-weight-semibold);
  line-height: var(--ic-leading-heading);
  letter-spacing: -0.015em;
}

.ic-heading-3 {
  font-family: var(--ic-font-sans);
  font-size: var(--ic-text-lg);
  font-weight: var(--ic-weight-semibold);
  line-height: var(--ic-leading-heading);
}

.ic-body,
.ic-body-large,
.ic-supporting {
  margin-block: 0;
  font-family: var(--ic-font-sans);
  color: var(--ic-color-text-muted);
}

.ic-body-large {
  max-width: var(--ic-reading-width);
  font-size: var(--ic-text-lg);
  font-weight: var(--ic-weight-regular);
  line-height: var(--ic-leading-body);
}

.ic-body {
  max-width: var(--ic-reading-width);
  font-size: var(--ic-text-base);
  font-weight: var(--ic-weight-regular);
  line-height: var(--ic-leading-body);
}

.ic-supporting {
  font-size: var(--ic-text-sm);
  font-weight: var(--ic-weight-regular);
  line-height: 1.55;
}

.ic-label {
  font-family: var(--ic-font-sans);
  font-size: var(--ic-text-sm);
  font-weight: var(--ic-weight-medium);
  line-height: var(--ic-leading-ui);
}

.ic-identifier {
  font-family: var(--ic-font-mono);
  font-size: var(--ic-text-xs);
  font-weight: var(--ic-weight-regular);
  line-height: var(--ic-leading-ui);
  letter-spacing: 0.015em;
}

/* Shared control foundations */
.ic-button {
  min-height: var(--ic-control-height);
  padding: 0 var(--ic-space-5);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ic-space-2);
  border: 1px solid transparent;
  border-radius: var(--ic-radius-control);
  font-family: var(--ic-font-sans);
  font-size: var(--ic-text-sm);
  font-weight: var(--ic-weight-medium);
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--ic-motion-standard), border-color var(--ic-motion-standard), box-shadow var(--ic-motion-standard), transform var(--ic-motion-fast);
}

.ic-button:hover {
  transform: translateY(-1px);
}

.ic-button:active {
  transform: translateY(0);
}

.ic-button:focus-visible,
.ic-control:focus-visible,
.ic-icon-button:focus-visible {
  outline: none;
  box-shadow: var(--ic-focus-ring);
}

.ic-button[disabled],
.ic-button[aria-disabled='true'] {
  opacity: 0.55;
  pointer-events: none;
  transform: none;
}

.ic-button--primary {
  background: var(--ic-color-action);
  color: #fff;
  box-shadow: 0 7px 18px rgba(178, 59, 59, 0.2);
}

.ic-button--primary:hover {
  background: var(--ic-color-action-hover);
}

.ic-button--secondary {
  border-color: var(--ic-color-border);
  background: var(--ic-color-surface);
  color: var(--ic-color-text);
  box-shadow: var(--ic-shadow-subtle);
}

.ic-button--quiet {
  background: transparent;
  color: var(--ic-color-text-muted);
}

.ic-button--danger {
  border-color: rgba(166, 67, 46, 0.28);
  background: rgba(166, 67, 46, 0.08);
  color: var(--ic-color-danger);
}

.ic-icon-button {
  width: var(--ic-control-height);
  height: var(--ic-control-height);
  padding: 0;
  display: inline-grid;
  place-items: center;
  border: 1px solid transparent;
  border-radius: var(--ic-radius-control);
  background: transparent;
  color: var(--ic-color-text-muted);
  transition: background var(--ic-motion-standard), color var(--ic-motion-standard), box-shadow var(--ic-motion-standard);
}

.ic-icon-button:hover {
  background: rgba(26, 43, 68, 0.06);
  color: var(--ic-color-text);
}

.ic-control {
  width: 100%;
  min-height: var(--ic-control-height);
  padding: 0 var(--ic-space-3);
  border: 1px solid var(--ic-color-border);
  border-radius: var(--ic-radius-control);
  background: var(--ic-color-surface);
  color: var(--ic-color-text);
  font-family: var(--ic-font-sans);
  font-size: var(--ic-text-sm);
  font-weight: var(--ic-weight-regular);
  line-height: var(--ic-leading-ui);
  box-shadow: var(--ic-shadow-subtle);
  transition: border-color var(--ic-motion-standard), box-shadow var(--ic-motion-standard), background var(--ic-motion-standard);
}

textarea.ic-control {
  min-height: 7rem;
  padding-block: var(--ic-space-3);
  resize: vertical;
}

.ic-control:hover {
  border-color: rgba(26, 43, 68, 0.24);
}

.ic-control:focus {
  border-color: rgba(178, 59, 59, 0.48);
  background: #fff;
}

/* Shared surface foundations */
.ic-card,
.ic-panel,
.ic-notice {
  border: 1px solid var(--ic-color-border);
  background: var(--ic-color-surface);
}

.ic-card {
  padding: var(--ic-space-6);
  border-radius: var(--ic-radius-card);
  box-shadow: var(--ic-shadow-subtle);
}

.ic-panel {
  padding: var(--ic-space-8);
  border-radius: var(--ic-radius-panel);
  box-shadow: var(--ic-shadow-raised);
}

.ic-notice {
  padding: var(--ic-space-4);
  display: flex;
  align-items: flex-start;
  gap: var(--ic-space-3);
  border-radius: var(--ic-radius-card);
  color: var(--ic-color-text-muted);
  font-size: var(--ic-text-sm);
  line-height: 1.55;
}

.ic-notice--success {
  border-color: rgba(92, 122, 107, 0.28);
  background: rgba(92, 122, 107, 0.08);
}

.ic-notice--warning {
  border-color: rgba(201, 154, 61, 0.3);
  background: rgba(201, 154, 61, 0.09);
}

.ic-notice--danger {
  border-color: rgba(166, 67, 46, 0.28);
  background: rgba(166, 67, 46, 0.08);
}

.ic-stack {
  display: flex;
  flex-direction: column;
  gap: var(--ic-stack-gap, var(--ic-space-4));
}

.ic-cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ic-cluster-gap, var(--ic-space-3));
}

.ic-container {
  width: min(calc(100% - 2rem), var(--ic-content-width));
  margin-inline: auto;
}

/*
 * Shared choice-group primitive (fieldset of exclusive radio cards).
 * Generalized from the market-scoped Norway pattern introduced by Feature 84E
 * so every market composes the same semantic control instead of hand-rolling
 * its own radio markup and CSS per country.
 */
.ic-choice-group {
  min-width: 0;
  margin: var(--ic-space-4) 0;
  padding: var(--ic-space-3);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--ic-space-2);
  border: 0;
  border-radius: 0;
  background: transparent;
}

.ic-choice-group legend {
  grid-column: 1 / -1;
  width: 100%;
  max-width: 100%;
  margin: 0 0 var(--ic-space-2);
  padding: 0;
  color: var(--ic-color-text);
  font-family: var(--ic-font-sans);
  font-size: var(--ic-text-sm);
  font-weight: var(--ic-weight-semibold);
  line-height: var(--ic-leading-ui);
}

.ic-choice-card {
  min-width: 0;
  margin: 0;
  padding: var(--ic-space-3);
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: var(--ic-space-2);
  align-items: start;
  border: 1px solid var(--ic-color-border);
  border-radius: var(--ic-radius-control);
  background: var(--ic-color-surface);
  color: var(--ic-color-text);
  font-family: var(--ic-font-sans);
  cursor: pointer;
  transition: border-color var(--ic-motion-fast), background var(--ic-motion-fast), box-shadow var(--ic-motion-fast);
}

.ic-choice-card:hover {
  border-color: rgba(26, 43, 68, 0.24);
  background: var(--ic-color-canvas);
}

.ic-choice-card:has(input:checked) {
  border-color: var(--ic-color-action);
  background: rgba(178, 59, 59, 0.045);
  box-shadow: 0 0 0 2px rgba(178, 59, 59, 0.06);
}

.ic-choice-card input {
  width: 18px;
  height: 18px;
  min-height: 18px;
  margin: 1px 0 0;
  padding: 0;
  flex: 0 0 18px;
  accent-color: var(--ic-color-action);
}

.ic-choice-card input:focus-visible {
  outline: 2px solid var(--ic-color-action);
  outline-offset: 3px;
}

.ic-choice-card > span {
  min-width: 0;
  display: block;
}

.ic-choice-card strong {
  display: block;
  color: var(--ic-color-text);
  font-size: var(--ic-text-sm);
  font-weight: var(--ic-weight-medium);
  line-height: var(--ic-leading-ui);
}

.ic-choice-card small {
  display: block;
  margin-top: 2px;
  color: var(--ic-color-text-muted);
  font-size: var(--ic-text-xs);
  font-weight: var(--ic-weight-regular);
  line-height: var(--ic-leading-ui);
}

.ic-choice-group > .market-policy-note {
  grid-column: 1 / -1;
  margin: var(--ic-space-1) 0 0;
}

@media (max-width: 480px) {
  .ic-choice-group {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ic-button,
  .ic-icon-button,
  .ic-control,
  .ic-choice-card {
    transition-duration: 0.01ms;
  }

  .ic-button:hover,
  .ic-button:active {
    transform: none;
  }
}