/* Reset and base typography/layout. Mobile-first throughout. */

*,
*::before,
*::after {
  box-sizing: border-box;
}

/* The native [hidden] attribute must always win over component display
   rules (e.g. .field-group { display: grid }), otherwise toggling
   `hidden` from JavaScript has no visual effect. */
[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

/* Prevent sticky header from obscuring anchor scroll-to elements */
[id] {
  scroll-margin-top: 80px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background: var(--color-bg);
}

img,
svg {
  max-width: 100%;
  display: block;
}

h1,
h2,
h3,
h4 {
  line-height: var(--line-height-tight);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-3);
}

h1 {
  font-size: var(--font-size-h1);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-h2);
  letter-spacing: -0.015em;
  margin-top: var(--space-6);
}

h3 {
  font-size: var(--font-size-h3);
  letter-spacing: -0.01em;
  margin-top: var(--space-5);
}

p {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
}

a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-strong);
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -4rem;
  z-index: 100;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-3);
}

main {
  display: block;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) var(--space-8);
}

.noscript-banner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-4);
  background: var(--color-danger-bg);
  color: var(--color-danger);
  text-align: center;
  border-radius: var(--radius-md);
  border: 1px solid rgba(220, 38, 38, 0.2);
  font-weight: 600;
}

/* Header */
.site-header {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 2px 0 rgba(15, 23, 42, 0.03);
}

.site-header__inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.site-header__brand {
  font-weight: 800;
  font-size: var(--font-size-lg);
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: -0.025em;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.site-header__brand:hover {
  color: var(--color-primary);
}

.site-header__logo-icon {
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.site-header__brand:hover .site-header__logo-icon {
  transform: rotate(5deg) scale(1.05);
}

.site-header__nav {
  display: flex;
  align-items: center;
}

.site-header__nav a {
  min-height: var(--tap-target-min);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__nav a:hover {
  color: var(--color-primary);
  background-color: var(--color-bg);
}

.nav-link__icon {
  opacity: 0.6;
  transform: translateX(-2px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
}

.site-header__nav a:hover .nav-link__icon {
  opacity: 1;
  transform: translateX(2px);
  color: var(--color-primary);
}

/* Footer */
.site-footer {
  background: #0f172a; /* Slate 900 dark background for footer, highly trustworthy B2B contrast */
  color: #94a3b8; /* Slate 400 */
  border-top: 1px solid #1e293b;
  margin-top: var(--space-8);
}

.site-footer a {
  color: #cbd5e1; /* Slate 300 */
  transition: color var(--transition-fast);
}

.site-footer a:hover {
  color: #ffffff;
}

.site-footer__inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 768px) {
  .site-footer__inner {
    grid-template-columns: 1.4fr 2fr;
    gap: var(--space-6);
  }
}

.site-footer__groups {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 480px) {
  .site-footer__groups {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }
}

.site-footer__brand-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: var(--font-size-lg);
  letter-spacing: -0.025em;
  color: #ffffff !important;
  text-decoration: none;
}

.site-footer__logo-icon {
  color: var(--color-primary);
}

.site-footer__disclaimer {
  font-size: var(--font-size-sm);
  color: #64748b; /* Slate 500 */
  line-height: var(--line-height-base);
  margin: 0;
  max-width: 55ch;
}

.site-footer__nav-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-footer__heading {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #ffffff;
  margin: 0;
}

.site-footer__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer__nav a {
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  min-height: 36px;
}

.site-footer__preview-note {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: var(--space-4);
  border-top: 1px solid #1e293b;
  font-size: var(--font-size-xs);
  color: #475569; /* Slate 600 */
}

/* Breadcrumbs */
.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: 0;
  margin: 0 0 var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-subtle);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumbs li:not(:last-child)::after {
  content: "→";
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
}

/* Hero and page headers */
.hero,
.page-header {
  padding-block: var(--space-5);
  margin-bottom: var(--space-6);
}

.hero {
  background: radial-gradient(100% 100% at 50% 0%, #ffffff 0%, #f1f5f9 100%);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: var(--space-7) var(--space-6);
  margin-bottom: var(--space-7);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: #ffffff;
  border: 1px solid var(--color-border-strong);
  border-radius: 30px;
  padding: 6px 16px;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.5; }
}

.hero__headline {
  font-size: var(--font-size-h1);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--color-text);
  max-width: 25ch;
  margin: 0 auto var(--space-4);
}

.text-highlight {
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-background-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

.hero__lead {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 65ch;
  line-height: var(--line-height-base);
  margin: 0 auto var(--space-5);
}

.hero__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  z-index: 10;
  position: relative;
}

.hero__btn {
  min-width: 160px;
}

.hero__grid-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.04;
  background-image: radial-gradient(var(--color-text) 1px, transparent 0);
  background-size: 24px 24px;
  pointer-events: none;
}

.page-header {
  position: relative;
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-5);
  box-shadow: var(--shadow-sm);
}

.page-title {
  margin: 0 0 var(--space-2);
  font-size: var(--font-size-h2);
  font-weight: 800;
  letter-spacing: -0.025em;
}

.page-subtitle {
  margin: 0;
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  max-width: 65ch;
}

.category-header-accent {
  position: absolute;
  top: 0;
  left: 0;
  height: 6px;
  width: 100%;
}

.category-header-accent--inventory-operations {
  background: var(--color-accent);
}

.category-header-accent--workforce-costs {
  background: #8b5cf6;
}

.category-header-accent--saas-metrics {
  background: var(--color-primary);
}

.category-header-accent--business-costs {
  background: #f59e0b;
}

/* Section Header Styling */
.section-header {
  text-align: center;
  margin-bottom: var(--space-5);
}

.section-title {
  font-size: var(--font-size-h2);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}

.section-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 auto;
}

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Category Card Navigation */
.card-grid--categories {
  grid-template-columns: 1fr;
  margin-bottom: var(--space-7);
}

@media (min-width: 768px) {
  .card-grid--categories {
    grid-template-columns: repeat(3, 1fr);
  }
}

.category-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
}

.category-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-lg);
}

.category-card__header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.category-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-primary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.category-card--inventory-operations .category-card__icon {
  color: var(--color-accent);
  background: var(--color-accent-bg);
}

.category-card--workforce-costs .category-card__icon {
  color: #8b5cf6; /* Indigo/Purple 500 for Workforce Costs */
  background: #f5f3ff;
}

.category-card--saas-metrics .category-card__icon {
  color: var(--color-primary);
  background: #eff6ff;
}

.category-card__action {
  color: var(--color-text-subtle);
  opacity: 0.6;
  transform: translateX(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
}

.category-card:hover .category-card__action {
  opacity: 1;
  transform: translateX(0);
  color: var(--color-primary);
}

.category-card__content h3 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-lg);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--color-text);
}

.category-card__content p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: var(--color-text-muted);
}

/* Calculator Card */
.calculator-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  height: 100%;
  text-decoration: none;
  color: inherit;
}

.calculator-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-lg);
}

.calculator-card__header {
  margin-bottom: var(--space-2);
}

.calculator-card__category {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  background: var(--color-accent-bg);
  padding: 4px 10px;
  border-radius: 20px;
  display: inline-block;
}

.calculator-card__title {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-lg);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--color-text);
}

.calculator-card__summary {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  flex-grow: 1;
}

.calculator-card__footer {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-primary);
  margin-top: auto;
}

.calculator-card__action-icon {
  transform: translateX(0);
  transition: transform var(--transition-fast);
}

.calculator-card:hover .calculator-card__action-icon {
  transform: translateX(4px);
}

/* FAQ */
.faq__item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-3);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.faq__item:hover {
  border-color: var(--color-border-strong);
}

.faq__question {
  cursor: pointer;
  font-weight: 600;
  min-height: var(--tap-target-min);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--color-text);
  user-select: none;
}

.faq__question:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.faq__question::after {
  content: "↓";
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
  transition: transform var(--transition-fast);
}

.faq__answer {
  margin-top: var(--space-2);
  margin-bottom: 0;
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
}

.content-section {
  max-width: 72ch;
  line-height: var(--line-height-base);
  margin-bottom: var(--space-6);
}

.content-section h2 {
  font-size: var(--font-size-h3);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.content-section h3 {
  font-size: var(--font-size-lg);
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.content-section ul {
  padding-left: var(--space-5);
}

.content-section li {
  margin-bottom: var(--space-2);
}

.table-wrapper {
  overflow-x: auto;
  margin-bottom: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  -webkit-overflow-scrolling: touch;
}

.table-wrapper table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.table-wrapper th,
.table-wrapper td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.table-wrapper thead th {
  background: var(--color-bg);
  font-weight: 700;
  color: var(--color-text);
}

.table-wrapper tbody tr:last-child td {
  border-bottom: none;
}

.not-found {
  text-align: center;
  padding-block: var(--space-7);
}