:root {
  color-scheme: light;
  --bg: #f0f4fa;
  --bg-elevated: #ffffff;
  --text: #152033;
  --muted: #5c6b7f;
  --accent: #0b5bd6;
  --accent-hover: #094aa8;
  --accent-soft: #e8f1ff;
  --border: #d5deeb;
  --border-strong: #b8c5d9;
  --error: #c62828;
  --error-bg: #ffebee;
  --success: #0d7a45;
  --success-bg: #e8f7ee;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(15, 35, 70, 0.06);
  --shadow-md: 0 10px 30px rgba(15, 35, 70, 0.1);
  --font: "DM Sans", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --header-h: 4rem;
  --transition: 0.18s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  display: flex;
  flex-direction: column;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Site header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
  padding: 0.65rem 1.25rem;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.02rem;
  white-space: nowrap;
}

.site-brand:hover,
.site-brand:focus {
  color: var(--accent);
}

.top-tools {
  display: contents;
}

.page {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  flex: 1;
}

/* Home hero */
.hero {
  margin-bottom: 1.35rem;
  padding: 1.75rem 1.5rem;
  background: linear-gradient(145deg, #ffffff 0%, #e8f1ff 55%, #f5f9ff 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.hero__eyebrow {
  display: inline-block;
  margin: 0 0 0.65rem;
  padding: 0.22rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(255, 255, 255, 0.85);
  border-radius: 999px;
}

.hero h1 {
  margin: 0;
  max-width: 18ch;
  font-size: clamp(1.65rem, 3.2vw, 2.35rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
}

.hero__lead {
  margin: 0.75rem 0 0;
  max-width: 56ch;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 1.35rem;
}

.hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.75rem 0.85rem;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.hero__stat strong {
  font-size: 1.35rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}

.hero__stat span {
  font-size: 0.82rem;
  color: var(--muted);
}

.hero__stat--calculations strong {
  color: var(--accent);
}

@media (min-width: 640px) {
  .hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Home intro (blog and legacy) */
.page--home .page-intro,
.page--blog .page-intro {
  margin-bottom: 1rem;
}

.page-intro__eyebrow {
  display: inline-block;
  margin: 0 0 0.5rem;
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

.page-intro h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.page-intro__lead {
  margin: 0.65rem 0 0;
  max-width: 52ch;
  color: var(--muted);
  font-size: 1rem;
}

.site-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.5rem;
  margin: 0 0 1.35rem;
  padding: 0.65rem 0.85rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--muted);
  box-shadow: var(--shadow-sm);
}

.site-meta__value {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--text);
}

.site-meta__label {
  color: var(--muted);
}

/* Calculator page header */
.page-header {
  margin-bottom: 1.25rem;
}

.page-header h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.35rem, 2.5vw, 1.9rem);
  line-height: 1.25;
}

.page-header p {
  margin: 0;
  color: var(--muted);
  max-width: 62ch;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin: 0 0 0.65rem;
  padding: 0;
  list-style: none;
  font-size: 0.86rem;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--accent);
  text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumb a:focus {
  text-decoration: underline;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.35rem;
  color: var(--border-strong);
}

/* Navigation */
.site-nav {
  margin-top: 1rem;
  padding: 0.35rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.nav-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.nav-links a {
  display: inline-block;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--accent);
  background: var(--accent-soft);
}

.nav-links a.is-active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

/* Cards */
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.card--form {
  border-color: #c5d8f5;
  box-shadow: var(--shadow-md);
}

.card--results {
  border-style: dashed;
  border-color: var(--border-strong);
  background: #fafcff;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.helper-text {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.assumptions {
  color: var(--muted);
  font-size: 0.94rem;
}

.assumptions ul {
  margin: 0.5rem 0 0;
  padding-left: 1.15rem;
}

/* Home calculator grid */
.calc-list h2 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
}

.calc-list__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.85rem;
}

.calc-tile {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 1.05rem;
  text-decoration: none;
  color: inherit;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.calc-tile:hover,
.calc-tile:focus {
  transform: translateY(-2px);
  border-color: #a8c4f0;
  box-shadow: var(--shadow-md);
}

.calc-tile__icon {
  font-size: 1.5rem;
  line-height: 1;
}

.calc-tile h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--text);
}

.calc-tile p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
  flex: 1;
}

.calc-tile__cta {
  margin-top: 0.35rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
}

/* Detail chips */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.6rem;
}

.detail-item {
  padding: 0.7rem 0.85rem;
  background: #f7faff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.detail-item strong {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--text);
  font-size: 0.82rem;
}

/* Forms */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

label {
  font-weight: 600;
  font-size: 0.9rem;
}

.field-hint {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 400;
}

input,
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.75rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:hover,
select:hover {
  border-color: var(--border-strong);
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(11, 91, 214, 0.18);
}

input::placeholder {
  color: #94a3b8;
}

.hidden {
  display: none !important;
}

.mode-field select {
  font-weight: 600;
}

.mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.mode-tab {
  flex: 1;
  min-width: 140px;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition);
}

.mode-tab:hover,
.mode-tab:focus {
  border-color: var(--accent);
  color: var(--accent);
}

.mode-tab.is-active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.mode-tab span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--muted);
}

.mode-tab.is-active span {
  color: var(--accent);
}

.mode-indicator {
  margin: 0 0 1rem;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  border: 1px solid #c5d8f5;
  font-size: 0.9rem;
}

.mode-indicator strong {
  display: block;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.mode-indicator span {
  color: var(--muted);
  font-size: 0.85rem;
}

.mode-indicator--trip {
  background: #eef8f2;
  border-color: #b8e6c8;
}

.mode-indicator--trip strong {
  color: var(--success);
}

.mode-panel {
  margin-bottom: 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #fafcff;
  transition: opacity var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.mode-panel--active {
  border-color: #86adf7;
  box-shadow: 0 0 0 2px rgba(11, 91, 214, 0.12);
  background: #fff;
}

.mode-panel--inactive {
  opacity: 0.72;
}

.mode-panel__title {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
}

.mode-panel__hint {
  margin: 0 0 0.85rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.field--optional label::after {
  content: " (opcionalis)";
  font-weight: 400;
  color: var(--muted);
}

.field--checkbox label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  cursor: pointer;
}

.field--checkbox input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--accent);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

button {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.15rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

button[type="submit"] {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(11, 91, 214, 0.25);
}

button[type="submit"]:hover,
button[type="submit"]:focus {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

button[type="reset"],
.btn-secondary {
  background: #fff;
  color: var(--muted);
  border-color: var(--border);
}

button[type="reset"]:hover,
button[type="reset"]:focus {
  color: var(--text);
  border-color: var(--border-strong);
  background: #f8fafc;
}

/* Results */
.error {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--error-bg);
  color: var(--error);
  font-weight: 600;
  font-size: 0.92rem;
}

.error:empty {
  display: none;
}

.error::before {
  content: "!";
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--error);
  color: #fff;
  font-size: 0.75rem;
}

.result {
  margin-top: 1rem;
  padding: 0;
  border: none;
  background: transparent;
}

.result:empty {
  display: none;
}

.result-panel {
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  background: var(--success-bg);
  border: 1px solid #b8e6c8;
  animation: resultIn 0.35s ease;
}

@keyframes resultIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-panel p {
  margin: 0.35rem 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.result-panel .primary {
  margin-bottom: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(13, 122, 69, 0.2);
  color: var(--success);
  font-size: 1.15rem;
  font-weight: 700;
}

.result-panel .primary strong {
  color: var(--success);
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.65rem;
  margin-top: 0.75rem;
}

.result-stat {
  padding: 0.65rem 0.75rem;
  background: #fff;
  border-radius: var(--radius-sm);
  border: 1px solid #c8e6d4;
}

.result-stat span {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.15rem;
}

.result-stat strong {
  font-size: 1rem;
  color: var(--text);
}

/* Collapsible help */
.help-details {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #fafcff;
  overflow: hidden;
}

.help-details summary {
  padding: 0.85rem 1rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.help-details summary::-webkit-details-marker {
  display: none;
}

.help-details summary::after {
  content: "+";
  float: right;
  font-weight: 400;
  color: var(--accent);
}

.help-details[open] summary::after {
  content: "−";
}

.help-details__body {
  padding: 0 1rem 1rem;
  color: var(--muted);
  font-size: 0.92rem;
  border-top: 1px solid var(--border);
}

.help-details__body p {
  margin: 0.65rem 0 0;
}

.long-help {
  color: var(--muted);
}

.footer-note {
  margin-top: 1rem;
  padding: 0.75rem 0.9rem;
  font-size: 0.85rem;
  color: var(--muted);
  background: #f8fafc;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
}

/* Header controls (language + units) */
.header-controls {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* Language switch */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem;
  background: #f4f7fb;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.lang-switch-label {
  padding-left: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}

.lang-switch-buttons {
  display: inline-flex;
  gap: 0.2rem;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.1rem;
  padding: 0.4rem 0.55rem;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-btn:hover,
.lang-btn:focus {
  color: var(--accent);
  background: #fff;
}

.lang-btn.is-active {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

/* Unit switch */
.unit-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem;
  background: #f4f7fb;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.unit-switch-label {
  padding-left: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}

.unit-switch-buttons {
  display: inline-flex;
  gap: 0.2rem;
}

.unit-btn {
  padding: 0.4rem 0.75rem;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
}

.unit-btn:hover,
.unit-btn:focus {
  color: var(--accent);
  background: #fff;
}

.unit-btn.is-active {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

/* Site footer */
.home-blog-cta {
  margin-top: 1rem;
}

.home-blog-cta h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.home-blog-cta p {
  margin: 0 0 0.85rem;
  color: var(--muted);
}

.home-blog-cta__link {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.home-blog-cta__link:hover,
.home-blog-cta__link:focus {
  color: var(--accent-hover);
  text-decoration: underline;
}

.blog-list h2 {
  margin: 0 0 1rem;
  font-size: 1.15rem;
}

.blog-list__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.85rem;
}

.blog-empty {
  padding: 2rem 1.25rem;
  text-align: center;
  background: var(--bg);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
}

.blog-empty__title {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.blog-empty__message {
  margin: 0 auto;
  max-width: 42ch;
  color: var(--muted);
  font-size: 0.95rem;
}

.blog-card {
  display: block;
  padding: 1rem 1.1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.blog-card:hover,
.blog-card:focus {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.blog-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  color: var(--text);
}

.blog-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.45;
}

.blog-article__back {
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--accent);
  text-decoration: none;
}

.blog-article__back:hover,
.blog-article__back:focus {
  text-decoration: underline;
}

.blog-article h1 {
  margin: 0 0 0.5rem;
  font-size: 1.65rem;
  line-height: 1.25;
}

.blog-article__meta {
  margin: 0 0 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.blog-article__body h2 {
  margin: 1.5rem 0 0.65rem;
  font-size: 1.2rem;
}

.blog-article__body h3 {
  margin: 1.15rem 0 0.5rem;
  font-size: 1.05rem;
}

.blog-article__body p,
.blog-article__body ul,
.blog-article__body ol {
  margin: 0 0 0.85rem;
  line-height: 1.6;
}

.blog-article__body ul,
.blog-article__body ol {
  padding-left: 1.35rem;
}

.blog-article__body li {
  margin-bottom: 0.35rem;
}

.blog-article__body a {
  color: var(--accent);
  text-decoration: underline;
}

.blog-article__cta {
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
}

.blog-article__cta p {
  margin: 0 0 0.65rem;
  font-weight: 600;
}

.blog-article__cta a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.blog-article__cta a:hover,
.blog-article__cta a:focus {
  text-decoration: underline;
}

.site-footer {
  margin-top: auto;
  padding: 1.25rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  background: #fff;
}

.site-footer__sep {
  margin: 0 0.35rem;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus {
  text-decoration: underline;
}

/* Desktop calculator layout */
@media (min-width: 960px) {
  .calc-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 1rem;
    align-items: start;
  }

  .calc-layout__side {
    position: sticky;
    top: calc(var(--header-h) + 1rem);
  }
}

@media (max-width: 620px) {
  .site-header {
    flex-wrap: wrap;
    padding: 0.55rem 0.85rem;
  }

  .header-controls {
    width: 100%;
    justify-content: center;
    gap: 0.5rem;
  }

  .site-brand {
    font-size: 0.9rem;
  }

  .page {
    padding: 1rem 0.85rem 2rem;
  }

  .form-actions {
    flex-direction: column;
  }

  .form-actions button {
    width: 100%;
  }

  .unit-switch-label,
  .lang-switch-label {
    display: none;
  }
}

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

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