/* =============================================================
   FinanzaFácil — hoja de estilos única
   1. Tokens  2. Reset  3. Utilidades  4. Tipografía  5. Componentes
   6. Secciones  7. Efectos  8. Responsive  9. Reduced-motion
   ============================================================= */

/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #f5f8fc;
  --surface: #ffffff;
  --surface-2: #eaf1fb;
  --text: #101828;
  --text-muted: #5a6a84;
  --border: #dde5f0;
  --border-strong: #c2cee0;

  --accent: #2f6fed;
  --accent-dark: #1f52c4;
  --accent-soft: #e7eefd;
  --accent-contrast: #ffffff;

  --accent-2: #c9891f;
  --accent-2-dark: #a06b16;
  --accent-2-soft: #fbf0dd;

  --link: #2f6fed;
  --danger: #d1453b;
  --danger-soft: #fbeceb;
  --warning: #b8790f;
  --warning-soft: #fdf1de;
  --success: #1a9e6b;
  --success-soft: #e5f6ef;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow: 0 6px 24px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 16px 48px rgba(16, 24, 40, 0.12);

  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Sora", var(--sans);
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --nav-height: 68px;
  --container: 1180px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1220;
    --surface: #121a2b;
    --surface-2: #182338;
    --text: #eef2fa;
    --text-muted: #93a1bd;
    --border: #223049;
    --border-strong: #2c3c5a;

    --accent: #5b8dff;
    --accent-dark: #3f6be0;
    --accent-soft: #16233c;
    --accent-contrast: #06101f;

    --accent-2: #f0b94a;
    --accent-2-dark: #d99a2b;
    --accent-2-soft: #2a2311;

    --link: #7fa4ff;
    --danger: #f0776b;
    --danger-soft: #2c1614;
    --warning: #e0ac52;
    --warning-soft: #2a2114;
    --success: #34c98d;
    --success-soft: #12261f;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 56px rgba(0, 0, 0, 0.55);

    color-scheme: dark;
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  scroll-behavior: smooth;
  overflow-x: clip;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
[hidden] { display: none !important; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { font-family: var(--display); text-wrap: balance; line-height: 1.12; letter-spacing: -0.01em; font-weight: 600; }
ul, ol { padding-left: 1.2em; }
label { display: block; }
input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--accent-soft); color: var(--accent-dark); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--text); color: var(--surface);
  z-index: 9999; border-radius: 8px; font-weight: 500;
  transition: top .2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }

/* =============================================================
   3. Utilidades
   ============================================================= */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 1.25rem; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.stack { display: flex; flex-direction: column; }
.section { padding-block: clamp(2.5rem, 5vw, 4.5rem); }
.section-tight { padding-block: clamp(1.5rem, 3vw, 2.5rem); }
.badge {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .8rem; font-weight: 600; padding: .35rem .7rem;
  border-radius: 999px; background: var(--accent-soft); color: var(--accent-dark);
}
.eyebrow {
  display: block; font-size: .8rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--accent-dark); margin-bottom: .5rem;
}
.muted { color: var(--text-muted); }
.center { text-align: center; }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* =============================================================
   4. Tipografía
   ============================================================= */
h1 { font-size: clamp(2rem, 4.2vw, 3rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); margin-bottom: .6rem; }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.35rem); margin-bottom: .4rem; }
.lede { font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--text-muted); max-width: 60ch; }

/* =============================================================
   5. Componentes
   ============================================================= */

/* --- Header / nav --- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-height);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
@supports not (backdrop-filter: blur(1px)) {
  .site-header { background: var(--surface); }
}
.nav-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: flex; align-items: center; gap: .5rem; font-family: var(--display); font-weight: 700; font-size: 1.1rem; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: flex; align-items: center; justify-content: center; color: #fff; flex-shrink: 0;
  font-family: var(--display); font-size: .78rem; font-weight: 800; letter-spacing: -.02em;
}
.nav-links {
  display: flex; align-items: center; gap: 1.3rem; font-weight: 500; font-size: .92rem;
  overflow-x: auto; overflow-y: visible; scrollbar-width: none; -ms-overflow-style: none;
  padding-block: .2rem;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a { color: var(--text-muted); transition: color .2s var(--ease-out); white-space: nowrap; }
.nav-links a:hover, .nav-links a.is-active { color: var(--text); }

/* --- Botones --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .75rem 1.3rem; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem;
  transition: transform .15s var(--ease-out), box-shadow .15s var(--ease-out), background .15s var(--ease-out);
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: var(--accent-contrast); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--accent-dark); box-shadow: var(--shadow); }
.btn-secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--border-strong); }
.btn-block { width: 100%; }
.btn-lg { padding: 1rem 1.6rem; font-size: 1.05rem; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-ghost { color: var(--link); font-weight: 600; }
.btn-ghost:hover { text-decoration: underline; }
.btn-icon { padding: .55rem; width: 2.4rem; height: 2.4rem; }

/* --- Cards --- */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.tool-card-link {
  display: block; height: 100%;
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out), border-color .18s var(--ease-out);
}
.tool-card-link:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.tool-card-link .card { height: 100%; }
.tool-icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  background: var(--accent-soft); color: var(--accent-dark);
  display: flex; align-items: center; justify-content: center; margin-bottom: 1rem;
}
.tool-icon svg { width: 22px; height: 22px; }
.tool-category { font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); margin-bottom: .3rem; display: block; }

.category-block { margin-bottom: clamp(2rem, 4vw, 3rem); }
.category-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1.1rem; flex-wrap: wrap; }
.category-head .muted { font-size: .92rem; }
.tools-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }

/* --- Tool page: hero + tool card --- */
.tool-hero { padding-block: clamp(1.6rem, 3vw, 2.5rem) 1.2rem; }
.tool-hero .lede { margin-top: .5rem; }

.tool-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
  padding: clamp(1.2rem, 3vw, 2rem);
}

.privacy-badge {
  display: flex; align-items: center; gap: .6rem;
  font-size: .88rem; color: var(--text-muted);
  margin-top: 1rem; padding: .7rem .9rem;
  background: var(--accent-soft); border-radius: var(--radius-sm);
}
.privacy-badge svg { flex-shrink: 0; width: 18px; height: 18px; color: var(--accent-dark); }
.limits-note { font-size: .82rem; color: var(--text-muted); margin-top: .6rem; }

/* --- Ad slots --- */
.ad-slot {
  min-height: 100px; display: flex; align-items: center; justify-content: center;
  border: 1px dashed var(--border-strong); border-radius: var(--radius-sm);
  color: var(--text-muted); font-size: .78rem; letter-spacing: .04em; text-transform: uppercase;
  margin-block: 1.75rem; background: var(--surface-2);
}

/* --- FAQ --- */
.faq-list { display: flex; flex-direction: column; gap: .6rem; }
.faq-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: .2rem .1rem;
}
.faq-item summary {
  cursor: pointer; list-style: none; padding: .9rem 1rem;
  font-weight: 600; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-size: 1.3rem; font-weight: 400; color: var(--text-muted); flex-shrink: 0;
  transition: transform .2s var(--ease-out);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-answer { padding: 0 1rem 1rem; color: var(--text-muted); }

/* --- Formularios (calculadoras) --- */
.form-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.field { display: flex; flex-direction: column; gap: .4rem; }
.field label { font-weight: 600; font-size: .92rem; }
.field .hint { font-size: .8rem; color: var(--text-muted); }
.input, select.input {
  width: 100%; padding: .7rem .85rem;
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--text); font-size: 1rem;
  font-family: var(--mono);
  transition: border-color .15s var(--ease-out), box-shadow .15s var(--ease-out);
}
select.input { font-family: var(--sans); }
textarea.input { min-height: 120px; resize: vertical; font-family: inherit; }
.input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); outline: none; }
.input-prefix-wrap { position: relative; }
.input-prefix-wrap .input { padding-left: 1.9rem; }
.input-prefix { position: absolute; left: .85rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; font-family: var(--mono); }
.input-suffix-wrap { position: relative; }
.input-suffix-wrap .input { padding-right: 2.6rem; }
.input-suffix { position: absolute; right: .85rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; font-family: var(--mono); font-size: .9rem; }

.toggle-row { display: flex; align-items: center; gap: .6rem; padding: .5rem 0; }
.toggle-row input[type="checkbox"] { width: 1.1rem; height: 1.1rem; accent-color: var(--accent); }
.toggle-row label { font-weight: 500; font-size: .92rem; }

.segmented { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .2rem; gap: .2rem; flex-wrap: wrap; }
.segmented button {
  padding: .5rem .9rem; border-radius: calc(var(--radius-sm) - 3px); font-weight: 600; font-size: .86rem;
  color: var(--text-muted); transition: background .15s var(--ease-out), color .15s var(--ease-out);
}
.segmented button.is-active { background: var(--surface); color: var(--accent-dark); box-shadow: var(--shadow-sm); }

.result-panel {
  margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px dashed var(--border);
  display: none;
}
.result-panel.is-visible { display: block; }
.result-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .8rem; margin-bottom: 1.2rem; }
.result-stat {
  background: var(--surface-2); border-radius: var(--radius-sm); padding: .9rem 1rem;
}
.result-stat .label { font-size: .78rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.result-stat .value { font-family: var(--mono); font-size: 1.5rem; font-weight: 700; margin-top: .15rem; }
.result-stat.highlight { background: var(--accent-soft); grid-column: 1 / -1; }
.result-stat.highlight .value { color: var(--accent-dark); font-size: clamp(1.8rem, 4vw, 2.4rem); }
.result-stat.positive .value { color: var(--success); }
.result-stat.negative .value { color: var(--danger); }

/* --- Gráficos (Chart.js) --- */
.chart-card { margin-top: 1.4rem; }
.chart-wrap { position: relative; width: 100%; height: 280px; }
.chart-wrap canvas { width: 100% !important; height: 100% !important; }
.chart-legend { display: flex; gap: 1.2rem; flex-wrap: wrap; margin-top: .8rem; font-size: .84rem; color: var(--text-muted); }
.chart-legend span { display: inline-flex; align-items: center; gap: .4rem; }
.chart-legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.chart-fallback { display: none; padding: 1rem; text-align: center; color: var(--text-muted); font-size: .88rem; }

/* --- Tabla de amortización --- */
.amort-table-wrap { margin-top: 1.2rem; overflow-x: auto; overflow-y: auto; max-height: 420px; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.amort-table { width: 100%; border-collapse: collapse; font-size: .86rem; font-family: var(--mono); }
.amort-table th, .amort-table td { border-bottom: 1px solid var(--border); padding: .55rem .7rem; text-align: right; white-space: nowrap; }
.amort-table th:first-child, .amort-table td:first-child { text-align: left; font-family: var(--sans); }
.amort-table th { background: var(--surface-2); font-weight: 700; position: sticky; top: 0; font-family: var(--sans); text-align: right; }
.amort-table th:first-child { text-align: left; }

/* --- Divisas --- */
.currency-swap-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: .8rem; }
.currency-swap-btn {
  width: 2.6rem; height: 2.6rem; border-radius: 50%; background: var(--surface-2);
  border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
  transition: transform .2s var(--ease-out), background .15s var(--ease-out); margin-bottom: .15rem;
}
.currency-swap-btn:hover { background: var(--accent-soft); transform: rotate(180deg); }
.currency-swap-btn svg { width: 18px; height: 18px; color: var(--accent-dark); }
.currency-amount-field { display: flex; gap: .5rem; }
.currency-amount-field .input { flex: 1 1 auto; }
.currency-amount-field select { flex: 0 0 6.5rem; }
.rate-meta { display: flex; align-items: center; justify-content: space-between; gap: .8rem; margin-top: .9rem; font-size: .82rem; color: var(--text-muted); flex-wrap: wrap; }
.rate-meta .refresh-btn { display: inline-flex; align-items: center; gap: .35rem; color: var(--link); font-weight: 600; }
.rate-meta .refresh-btn svg { width: 14px; height: 14px; }
.rate-badge { display: inline-flex; align-items: center; gap: .35rem; padding: .2rem .55rem; border-radius: 999px; font-weight: 600; font-size: .76rem; }
.rate-badge.is-live { background: var(--success-soft); color: var(--success); }
.rate-badge.is-cached { background: var(--warning-soft); color: var(--warning); }
.rate-badge.is-error { background: var(--danger-soft); color: var(--danger); }
.rate-table-wrap { margin-top: 1rem; overflow-x: auto; }
.rate-table { width: 100%; border-collapse: collapse; font-size: .86rem; }
.rate-table th, .rate-table td { padding: .5rem .6rem; border-bottom: 1px solid var(--border); text-align: right; }
.rate-table th:first-child, .rate-table td:first-child { text-align: left; }
.rate-table td.num { font-family: var(--mono); }

/* --- Escenarios / comparativas genéricas --- */
.bar-chart { display: flex; flex-direction: column; gap: .55rem; margin-top: .5rem; }
.bar-row { display: grid; grid-template-columns: 130px 1fr auto; align-items: center; gap: .6rem; font-size: .85rem; }
.bar-track { height: 10px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.bar-fill { height: 100%; border-radius: 999px; background: var(--accent); transition: width .5s var(--ease-out); }
.bar-fill.bar-alt { background: var(--accent-2); }
.bar-fill.bar-danger { background: var(--danger); }
.bar-fill.bar-success { background: var(--success); }

.calc-disclaimer {
  font-size: .82rem; color: var(--text-muted); background: var(--warning-soft);
  border-radius: var(--radius-sm); padding: .8rem 1rem; margin-top: 1.2rem;
}

/* --- Cómo funciona --- */
.steps-grid { display: grid; grid-template-columns: 1fr; gap: 1.2rem; }
.step { display: flex; gap: 1rem; }
.step-num {
  flex-shrink: 0; width: 34px; height: 34px; border-radius: 50%;
  background: var(--accent); color: var(--accent-contrast);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-family: var(--display);
}

/* --- Footer --- */
.site-footer { border-top: 1px solid var(--border); padding-block: 2.5rem 1.5rem; background: var(--surface); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-bottom: 2rem; }
.footer-col h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-muted); margin-bottom: .8rem; }
.footer-col ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: .55rem; }
.footer-col a { color: var(--text-muted); font-size: .92rem; transition: color .15s var(--ease-out); }
.footer-col a:hover { color: var(--text); }
.footer-brand p { color: var(--text-muted); font-size: .9rem; margin-top: .6rem; max-width: 32ch; }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: .8rem 1.5rem; justify-content: space-between; align-items: center;
  padding-top: 1.5rem; border-top: 1px solid var(--border);
  font-size: .82rem; color: var(--text-muted);
}
.affiliate-disclosure { max-width: 70ch; }

/* --- Páginas legales --- */
.legal-content { max-width: 74ch; }
.legal-content h2 { margin-top: 2rem; }
.legal-content p, .legal-content li { color: var(--text-muted); margin-bottom: .8rem; }
.legal-content ul { margin-bottom: .8rem; }

/* --- Home hero --- */
.hero {
  padding-block: clamp(2.5rem, 6vw, 5rem) clamp(1.5rem, 3vw, 2.5rem);
  position: relative; overflow: clip;
}
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto -10%; height: 60%;
  background: radial-gradient(60% 60% at 30% 20%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%);
  pointer-events: none; z-index: -1;
}
.hero .eyebrow { display: inline-flex; }
.hero-cta-row { display: flex; gap: .8rem; margin-top: 1.6rem; flex-wrap: wrap; }
.hero-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: .8rem; margin-top: 2rem; }
.hero-stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.2rem; box-shadow: var(--shadow-sm); }
.hero-stat .value { font-family: var(--display); font-size: 1.6rem; font-weight: 700; color: var(--accent-dark); }
.hero-stat .label { font-size: .82rem; color: var(--text-muted); margin-top: .1rem; }

/* =============================================================
   6. Secciones específicas
   ============================================================= */
.seo-content { max-width: 74ch; }
.seo-content h2 { margin-top: 2.2rem; }
.seo-content p { margin-bottom: 1rem; color: var(--text); }
.seo-content ul { margin-bottom: 1rem; }
.seo-content li { margin-bottom: .4rem; }

.related-tools { margin-top: 2rem; }

/* =============================================================
   7. Efectos
   ============================================================= */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s var(--ease-out), transform .5s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }

[data-state] .idle-only { display: block; }
[data-state="loading"] .idle-only,
[data-state="working"] .idle-only,
[data-state="done"] .idle-only,
[data-state="error"] .idle-only { display: none; }

.state-msg { display: none; align-items: center; gap: .6rem; padding: 1rem; border-radius: var(--radius-sm); font-size: .92rem; }
[data-state="loading"] .state-loading,
[data-state="working"] .state-loading { display: flex; background: var(--accent-soft); color: var(--accent-dark); }
[data-state="error"] .state-error { display: flex; background: var(--danger-soft); color: var(--danger); }

.spinner {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid currentColor; border-top-color: transparent;
  animation: spin .8s linear infinite; flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* =============================================================
   8. Responsive
   ============================================================= */
@media (min-width: 540px) {
  .result-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 720px) {
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(3, 1fr); }
  .form-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid .field-full { grid-column: 1 / -1; }
}

@media (min-width: 960px) {
  .footer-grid { grid-template-columns: repeat(4, 1fr); }
  .result-grid { grid-template-columns: repeat(4, 1fr); }
  .result-stat.highlight { grid-column: span 2; }
  .tools-grid-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 539px) {
  .nav-links { gap: .9rem; font-size: .86rem; }
  .currency-swap-row { grid-template-columns: 1fr; }
  .currency-swap-btn { justify-self: center; transform: rotate(90deg); margin: 0; }
  .currency-swap-btn:hover { transform: rotate(270deg); }
}

/* =============================================================
   9. Reduced-motion — solo lo intrusivo
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .spinner { animation-duration: 1.4s; }
  .currency-swap-btn:hover { transform: none; }
}