/* ==========================================================================
   taxzeit — Global Stylesheet
   Mobile-first, responsive, system/Inter typography
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --color-primary: #1e293b;
  --color-primary-light: #334155;
  --color-primary-dark: #0f172a;
  --color-accent: #f59e0b;
  --color-accent-dark: #b45309;

  --color-text: #1f2937;
  --color-text-muted: #55637a;
  --color-heading: #0f172a;

  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;

  --font-sans: "Inter", "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Helvetica, Arial, sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  --container: 1140px;
  --reading-width: 720px;

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration-color: rgba(30, 41, 59, 0.35);
  text-underline-offset: 3px;
}

a:hover,
a:focus-visible {
  color: var(--color-accent-dark);
  text-decoration-color: currentColor;
}

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

h1,
h2,
h3,
h4 {
  color: var(--color-heading);
  line-height: 1.25;
  margin: 0 0 var(--space-md);
  font-weight: 700;
  letter-spacing: -0.015em;
}

h1 {
  font-size: clamp(1.9rem, 5.5vw, 3rem);
}
h2 {
  font-size: clamp(1.45rem, 3.6vw, 2rem);
}
h3 {
  font-size: clamp(1.15rem, 2.6vw, 1.4rem);
}

p {
  margin: 0 0 var(--space-md);
}

ul,
ol {
  margin: 0 0 var(--space-md);
  padding-left: 1.3rem;
}

li {
  margin-bottom: 0.55rem;
}

strong {
  color: var(--color-heading);
  font-weight: 650;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.9em;
  background: var(--color-bg-alt);
  padding: 0.1em 0.35em;
  border-radius: var(--radius-sm);
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 100;
  border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
  left: 0;
  color: #fff;
}

/* ---------- Header & navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 4.25rem;
  flex-wrap: wrap;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  text-decoration: none;
}

.logo-mark {
  display: block;
  width: 2rem;
  height: 2rem;
}

.logo-text span {
  color: var(--color-accent-dark);
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.main-nav li {
  margin: 0;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 550;
  color: var(--color-primary-light);
  text-decoration: none;
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a:focus-visible,
.main-nav a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  transition: transform 0.15s ease, background-color 0.15s ease,
    box-shadow 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #fff;
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

/* ---------- Hero ---------- */
.hero {
  background-color: var(--color-primary-dark);
  background-image:
    radial-gradient(
      58rem 30rem at 6% -12%,
      rgba(59, 130, 246, 0.3) 0%,
      transparent 62%
    ),
    linear-gradient(
      155deg,
      #1d3b5a 0%,
      var(--color-primary) 46%,
      var(--color-primary-dark) 100%
    );
  color: #e2e8f0;
  padding-block: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -55% auto;
  width: 30rem;
  height: 30rem;
  background: radial-gradient(
    circle,
    rgba(245, 158, 11, 0.26) 0%,
    transparent 68%
  );
  pointer-events: none;
}

.hero-inner {
  max-width: 46rem;
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: #fff;
  margin-bottom: var(--space-md);
}

.hero p {
  font-size: 1.08rem;
  color: #cbd5e1;
  max-width: 40rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

/* ---------- Sections ---------- */
.section {
  padding-block: var(--space-xl);
}

.section-alt {
  background: var(--color-bg-alt);
  border-block: 1px solid var(--color-border);
}

.section-head {
  max-width: 42rem;
  margin-bottom: var(--space-lg);
}

.section-head p {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.about-inner {
  display: grid;
  gap: var(--space-md);
  align-items: center;
}

.about-inner .section-head {
  margin-bottom: 0;
}

.about-mark {
  width: 6rem;
  height: 6rem;
  padding: var(--space-sm);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

/* ---------- Blog card grid ---------- */
.card-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
  list-style: none;
  margin: 0;
  padding: 0;
}

.card-grid > li {
  margin: 0;
}

.post-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    border-color 0.18s ease;
}

.post-card:hover,
.post-card:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: #cbd5e1;
}

.post-card .tag {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: #eef2f7;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  margin-bottom: var(--space-sm);
}

.post-card h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-xs);
}

.post-card h3 a {
  text-decoration: none;
  color: var(--color-heading);
}

.post-card h3 a:hover,
.post-card h3 a:focus-visible {
  color: var(--color-accent-dark);
}

.post-card p {
  color: var(--color-text-muted);
  font-size: 0.96rem;
  margin-bottom: var(--space-md);
}

.post-card .card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-sm);
}

.post-card .read-more {
  font-weight: 600;
  text-decoration: none;
  color: var(--color-primary);
}

.post-card .read-more::after {
  content: " →";
}

/* ---------- Landing page sections ---------- */
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  list-style: none;
  margin: var(--space-lg) 0 0;
  padding: 0;
  font-size: 0.95rem;
  color: #cbd5e1;
}

.hero-points li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin: 0;
}

.hero-points li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
}

.topic-grid,
.trust-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
  list-style: none;
  margin: 0;
  padding: 0;
}

.topic-grid > li,
.trust-grid > li {
  margin: 0;
}

.topic-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    border-color 0.18s ease;
}

.topic-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: #cbd5e1;
}

.topic-card h3 {
  font-size: 1.15rem;
  margin-bottom: var(--space-xs);
}

.topic-card > p {
  color: var(--color-text-muted);
  font-size: 0.96rem;
  margin-bottom: var(--space-sm);
}

.topic-card ul {
  list-style: none;
  margin: auto 0 0;
  padding: 0;
  font-size: 0.93rem;
}

.topic-card li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.55rem;
}

.topic-card li:last-child {
  margin-bottom: 0;
}

.topic-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent-dark);
  font-weight: 700;
}

.topic-card li a {
  color: var(--color-heading);
  font-weight: 500;
  text-decoration: none;
}

.topic-card li a:hover,
.topic-card li a:focus-visible {
  color: var(--color-primary);
  text-decoration: underline;
}

.trust-item {
  position: relative;
  padding-left: 2.6rem;
}

.trust-item::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0.15rem;
  width: 1.8rem;
  height: 1.8rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
}

.trust-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.3rem;
}

.trust-item p {
  color: var(--color-text-muted);
  font-size: 0.96rem;
  margin: 0;
}

/* ---------- Tax calculator ---------- */
.calculator {
  margin: var(--space-lg) 0 var(--space-xl);
}

.calc-form {
  padding: var(--space-md);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.calc-grid {
  display: grid;
  gap: var(--space-sm) var(--space-md);
  grid-template-columns: 1fr;
}

.calc-form label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-heading);
}

.calc-form input,
.calc-form select {
  font: inherit;
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--color-text);
}

.calc-form .form-field {
  display: grid;
  gap: 0.3rem;
}

/* Author-level, because `display: grid` above outranks the browser's
   own [hidden] rule and would otherwise keep hidden fields on screen. */
.calc-form .form-field[hidden] {
  display: none;
}

.input-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 0.4rem;
}

.calc-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.checkbox input {
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--color-primary);
}

.checkbox span {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--color-text);
}

.calc-results {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.result-headline {
  display: grid;
  gap: var(--space-sm);
  grid-template-columns: 1fr;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.result-label {
  margin: 0 0 0.15rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.result-value {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.result-table {
  margin: var(--space-md) 0 0;
}

.result-table td {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.result-table th[scope='col']:not(:first-child) {
  text-align: right;
}

.result-table .is-total th,
.result-table .is-total td {
  font-weight: 700;
  color: var(--color-heading);
  background: var(--color-bg-alt);
}

.result-note {
  margin: var(--space-sm) 0 0;
  font-size: 0.86rem;
  color: var(--color-text-muted);
}

.disclaimer {
  padding: var(--space-sm) var(--space-md);
  border-left: 3px solid var(--color-border);
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* ---------- Article layout ---------- */
.breadcrumbs {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding-block: var(--space-md) 0;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumbs li {
  margin: 0;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: #94a3b8;
}

.article {
  padding-block: var(--space-lg) var(--space-2xl);
}

.article-inner {
  max-width: var(--reading-width);
  margin-inline: auto;
}

.article-header {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-md);
  margin-bottom: var(--space-lg);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.article-lead {
  font-size: 1.12rem;
  color: var(--color-primary-light);
}

.article-body {
  font-size: 1.05rem;
}

.article-body h2 {
  margin-top: var(--space-xl);
  padding-top: var(--space-xs);
  scroll-margin-top: 6rem;
}

.article-body h3 {
  margin-top: var(--space-lg);
  scroll-margin-top: 6rem;
}

.article-body li {
  margin-bottom: 0.65rem;
}

.article-body ol.steps {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

.article-body ol.steps > li {
  counter-increment: step;
  position: relative;
  padding-left: 3rem;
  margin-bottom: var(--space-lg);
}

.article-body ol.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.1rem;
  width: 2.1rem;
  height: 2.1rem;
  display: grid;
  place-items: center;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 50%;
}

/* "On this page" navigation */
.page-nav {
  margin-bottom: var(--space-lg);
}

.page-nav-inner {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.page-nav h2 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
}

.page-nav ol {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.94rem;
}

.page-nav li {
  margin-bottom: 0.15rem;
}

.page-nav a {
  display: block;
  padding: 0.3rem 0 0.3rem 0.7rem;
  margin-left: -0.7rem;
  border-left: 2px solid transparent;
  color: var(--color-primary-light);
  text-decoration: none;
  line-height: 1.4;
}

.page-nav a:hover,
.page-nav a:focus-visible {
  color: var(--color-primary);
  border-left-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.7);
}

.page-nav ol ol {
  margin: 0.1rem 0 0.4rem;
  padding-left: 0.9rem;
  font-size: 0.88rem;
  border-left: 1px solid var(--color-border);
}

.page-nav ol ol a {
  color: var(--color-text-muted);
}

/* Series navigation */
.part-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  background: var(--color-primary);
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  margin-bottom: var(--space-sm);
}

.series-nav {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.series-nav h2 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
}

.series-nav ol {
  counter-reset: part;
  list-style: none;
  margin: 0;
  padding: 0;
}

.series-nav li {
  counter-increment: part;
  position: relative;
  margin: 0;
  padding: 0.55rem 0 0.55rem 2.6rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.96rem;
}

.series-nav li:first-child {
  border-top: none;
}

.series-nav li::before {
  content: counter(part);
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 1.75rem;
  height: 1.75rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.series-nav li.is-current::before {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.series-nav li.is-current {
  font-weight: 600;
  color: var(--color-heading);
}

.series-nav .here {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  background: #fef3c7;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  margin-left: 0.4rem;
  vertical-align: 1px;
}

/* Related articles */
.related {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.article-body .related h2 {
  margin-top: 0;
  font-size: 1.3rem;
}

.related-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
  list-style: none;
  margin: 0;
  padding: 0;
}

.related-grid > li {
  margin: 0;
}

.section-intro {
  max-width: var(--reading-width);
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

/* Callouts */
.callout {
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  background: #fffbeb;
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-block: var(--space-lg);
}

.callout p:last-child,
.callout ul:last-child {
  margin-bottom: 0;
}

.callout h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.callout-info {
  border-left-color: var(--color-primary);
  background: #f1f5f9;
}

/* Comparison table */
.table-wrap {
  overflow-x: auto;
  margin-block: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  min-width: 32rem;
}

caption {
  caption-side: bottom;
  text-align: left;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: var(--space-sm);
}

th,
td {
  text-align: left;
  padding: 0.8rem var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

thead th {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
}

tbody tr:last-child th,
tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:nth-child(even) {
  background: var(--color-bg-alt);
}

/* FAQ */
.faq details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-sm);
  background: #fff;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-heading);
}

.faq details[open] summary {
  margin-bottom: var(--space-sm);
}

/* CTA band */
.cta-band {
  background: var(--color-primary);
  color: #cbd5e1;
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-top: var(--space-xl);
}

.cta-band h2 {
  color: #fff;
  margin-top: 0;
}

.cta-band p:last-of-type {
  margin-bottom: var(--space-md);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: #94a3b8;
  padding-block: var(--space-xl) var(--space-lg);
  font-size: 0.92rem;
  margin-top: var(--space-xl);
}

.footer-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.site-footer h2 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer a {
  color: #cbd5e1;
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: #fff;
  text-decoration: underline;
}

.site-footer address {
  font-style: normal;
  line-height: 1.8;
}

.footer-bottom {
  padding-top: var(--space-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: space-between;
  font-size: 0.85rem;
}

.footer-bottom p {
  margin: 0;
}

/* ---------- Responsive ---------- */
@media (min-width: 700px) {
  .about-inner {
    grid-template-columns: auto 1fr;
    gap: var(--space-lg);
  }

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

  .calc-grid .form-field.is-full {
    grid-column: 1 / -1;
  }

  .calc-form {
    padding: var(--space-lg);
  }

  .result-headline {
    grid-template-columns: repeat(3, 1fr);
  }

  .topic-grid,
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .topic-card {
    padding: var(--space-lg);
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

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

  .post-card {
    padding: var(--space-lg);
  }

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

  .cta-band {
    padding: var(--space-xl);
  }
}

@media (min-width: 1000px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-xl);
  }

  .section {
    padding-block: var(--space-2xl);
  }
}

/* Two-column reading layout: sticky "On this page" rail beside the article.
   Scoped to articles that have the rail, so pages without one stay single column. */
@media (min-width: 1080px) {
  .article-inner:has(.page-nav) {
    display: grid;
    grid-template-columns: 15rem minmax(0, var(--reading-width));
    column-gap: var(--space-xl);
    justify-content: center;
    align-items: start;
    max-width: var(--container);
  }

  .article-inner:has(.page-nav) > .article-header {
    grid-column: 2;
    grid-row: 1;
  }

  .page-nav {
    grid-column: 1;
    grid-row: 1 / span 2;
    position: sticky;
    top: 5.75rem;
    max-height: calc(100vh - 7.5rem);
    overflow-y: auto;
    margin-bottom: 0;
  }

  .page-nav-inner {
    background: transparent;
    border: none;
    border-left: 1px solid var(--color-border);
    border-radius: 0;
    padding: 0 0 0 var(--space-md);
  }

  .article-inner:has(.page-nav) > .article-body {
    grid-column: 2;
    grid-row: 2;
  }

  /* Anything after the body (related articles, disclaimers) stays in the
     reading column rather than sliding under the sticky rail. */
  .article-inner:has(.page-nav) > .article-body ~ * {
    grid-column: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Print ---------- */
@media print {
  .site-header,
  .site-footer,
  .cta-band,
  .related,
  .page-nav {
    display: none;
  }

  body {
    color: #000;
  }
}