/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #eef1f5;
  --border: #dde2e8;
  --text: #1a2233;
  --text-soft: #4a5568;
  --text-mute: #78828f;

  --accent: #0f5c4c;      /* verde-azulado serio, "dinero seguro" */
  --accent-dark: #0b4438;
  --accent-soft: #e3efec;
  --accent-contrast: #ffffff;

  --good: #147a4b;
  --good-bg: #e6f5ec;
  --bad: #b3271f;
  --bad-bg: #fbeae9;
  --warn: #9a6300;
  --warn-bg: #fdf3dc;

  --amortiza-color: #0f5c4c;
  --invierte-color: #7a4d0f;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow-sm: 0 1px 2px rgba(20, 30, 45, .06);
  --shadow-md: 0 8px 24px rgba(20, 30, 45, .10);

  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --container: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151d;
    --surface: #171f2a;
    --surface-2: #1e2733;
    --border: #2b3644;
    --text: #eef1f5;
    --text-soft: #b7c0cc;
    --text-mute: #8a94a3;

    --accent: #35c29b;
    --accent-dark: #23a483;
    --accent-soft: #163329;
    --accent-contrast: #06120e;

    --good: #35c29b;
    --good-bg: #10281f;
    --bad: #ff6a61;
    --bad-bg: #341413;
    --warn: #e8b34a;
    --warn-bg: #332707;

    --amortiza-color: #35c29b;
    --invierte-color: #e0a94b;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, .45);
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
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;
}
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 { text-wrap: balance; line-height: 1.15; letter-spacing: -0.01em; font-family: var(--display); font-weight: 600; }
ul, ol { padding-left: 1.2em; }
table { border-collapse: collapse; width: 100%; }
::selection { background: var(--accent); color: var(--accent-contrast); }

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

/* =============================================================
   3. Utilities
   ============================================================= */
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--surface); color: var(--text);
  z-index: 9999; border-radius: 8px; font-weight: 600; box-shadow: var(--shadow-md);
}
.skip-link:focus { top: 1rem; }
.container { 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;
}
.section { padding-block: 2.5rem; }
.section-narrow { max-width: 760px; margin-inline: auto; }
.text-mute { color: var(--text-mute); }
.text-soft { color: var(--text-soft); }

/* =============================================================
   4. Typography
   ============================================================= */
h1 { font-size: clamp(1.7rem, 1.2rem + 2vw, 2.5rem); }
h2 { font-size: clamp(1.35rem, 1.1rem + 1vw, 1.85rem); margin-bottom: .6em; }
h3 { font-size: 1.15rem; margin-bottom: .4em; }
article p, .prose p { margin-bottom: 1.05em; max-width: 68ch; }
.prose ul, .prose ol { margin-bottom: 1.05em; max-width: 68ch; }
.prose li { margin-bottom: .4em; }
.lede { font-size: 1.1rem; color: var(--text-soft); max-width: 62ch; }

/* =============================================================
   5. Components
   ============================================================= */

/* --- Header / nav --- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 64px; }
.brand { display: flex; align-items: center; gap: .55rem; font-family: var(--display); font-weight: 700; font-size: 1.1rem; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--accent);
  color: var(--accent-contrast); display: grid; place-items: center; font-size: .95rem; font-weight: 800;
  font-family: var(--sans);
}
.main-nav { display: none; }
.main-nav ul { list-style: none; padding: 0; margin: 0; display: flex; gap: 1.4rem; }
.main-nav a { font-size: .93rem; font-weight: 600; color: var(--text-soft); transition: color .15s var(--ease-out); }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--accent); }
.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 8px; border: 1px solid var(--border);
}
@media (min-width: 960px) {
  .main-nav { display: block; }
  .nav-toggle { display: none; }
}
.mobile-menu {
  display: none; flex-direction: column; gap: .1rem; padding: .5rem 1.25rem 1rem;
  border-top: 1px solid var(--border); background: var(--bg);
}
.mobile-menu.is-open { display: flex; }
.mobile-menu a { padding: .6rem 0; font-weight: 600; border-bottom: 1px solid var(--border); }
@media (min-width: 960px) { .mobile-menu { display: none !important; } }

/* --- Hero --- */
.hero { padding-block: 2.2rem 1rem; }
.hero .lede { margin-top: .5rem; }
.trust-badges { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem; }
.badge {
  display: inline-flex; align-items: center; gap: .35rem;
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
  padding: .35rem .75rem; font-size: .82rem; color: var(--text-soft); font-weight: 600;
}
.badge svg { width: 14px; height: 14px; flex: none; }

/* --- Tool card --- */
.tool-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-md); padding: 1.4rem; margin-top: 1.4rem;
}
.tool-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 720px) { .tool-grid { grid-template-columns: repeat(2, 1fr); } }
.field { display: flex; flex-direction: column; gap: .35rem; }
.field label { font-size: .85rem; font-weight: 700; color: var(--text-soft); }
.field .hint { font-size: .78rem; color: var(--text-mute); }
.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap .suffix {
  position: absolute; right: .9rem; font-size: .88rem; color: var(--text-mute); font-weight: 600; pointer-events: none;
}
input[type="number"], input[type="text"], input[type="email"], select {
  width: 100%; padding: .7rem .9rem; border-radius: var(--radius-sm); border: 1.5px solid var(--border);
  background: var(--surface); color: var(--text); font-size: 1rem; font-weight: 600;
  transition: border-color .15s var(--ease-out), box-shadow .15s var(--ease-out);
}
.input-wrap input { padding-right: 3rem; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); outline: none; }
input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { opacity: 1; }

.segmented { display: inline-flex; border: 1.5px solid var(--border); border-radius: 999px; padding: 3px; background: var(--surface-2); }
.segmented button {
  padding: .5rem 1rem; border-radius: 999px; font-size: .88rem; font-weight: 700; color: var(--text-soft);
  transition: background .15s var(--ease-out), color .15s var(--ease-out);
}
.segmented button[aria-selected="true"] { background: var(--accent); color: var(--accent-contrast); }

.field-extra-amount { grid-column: 1 / -1; }
.field-extra-amount .row { display: flex; flex-wrap: wrap; gap: .9rem; align-items: flex-end; }
.field-extra-amount .row > * { flex: 1 1 220px; }

.tool-actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: .75rem; margin-top: .3rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .8rem 1.4rem; border-radius: 999px; font-weight: 700; font-size: .95rem;
  transition: transform .12s var(--ease-out), box-shadow .12s var(--ease-out), background .12s 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-md); }
.btn-ghost { background: var(--surface-2); color: var(--text); border: 1.5px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: .5rem 1rem; font-size: .85rem; }
.btn:active { transform: scale(.97); }
.btn svg { width: 16px; height: 16px; }
.btn[disabled] { opacity: .55; pointer-events: none; }

.advanced-toggle { grid-column: 1 / -1; }
.advanced-fields { grid-column: 1 / -1; display: none; grid-template-columns: 1fr; gap: 1rem; padding-top: .6rem; border-top: 1px dashed var(--border); margin-top: .3rem; }
.advanced-fields.is-open { display: grid; }
@media (min-width: 720px) { .advanced-fields { grid-template-columns: repeat(2, 1fr); } }

/* --- Result state --- */
.tool-card[data-state="idle"] .results-zone { display: none; }
.results-zone { margin-top: 1.6rem; padding-top: 1.4rem; border-top: 1px solid var(--border); }

.scenario-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 860px) { .scenario-grid { grid-template-columns: repeat(3, 1fr); } }

.scenario-card {
  background: var(--surface-2); border: 1.5px solid var(--border); border-radius: var(--radius);
  padding: 1.1rem; display: flex; flex-direction: column; gap: .7rem; position: relative;
}
.scenario-card.is-winner { border-color: var(--accent); background: var(--accent-soft); box-shadow: var(--shadow-sm); }
.scenario-card .winner-tag {
  position: absolute; top: -11px; right: 1rem; background: var(--accent); color: var(--accent-contrast);
  font-size: .72rem; font-weight: 800; padding: .25rem .6rem; border-radius: 999px; letter-spacing: .02em;
}
.scenario-card h3 { font-family: var(--sans); font-size: .95rem; text-transform: uppercase; letter-spacing: .03em; color: var(--text-soft); }
.scenario-card .quota { font-family: var(--display); font-size: 1.7rem; font-weight: 700; }
.scenario-card .quota small { font-family: var(--sans); font-size: .85rem; font-weight: 600; color: var(--text-mute); }
.scenario-stats { display: flex; flex-direction: column; gap: .35rem; font-size: .88rem; }
.scenario-stats .stat { display: flex; justify-content: space-between; gap: .5rem; color: var(--text-soft); }
.scenario-stats .stat strong { color: var(--text); }
.scenario-card .save-amount { margin-top: .3rem; padding-top: .7rem; border-top: 1px dashed var(--border); }
.scenario-card .save-amount .label { font-size: .78rem; font-weight: 700; color: var(--text-mute); text-transform: uppercase; letter-spacing: .03em; }
.scenario-card .save-amount .value { font-family: var(--display); font-size: 1.5rem; font-weight: 700; color: var(--good); }
.scenario-card .save-amount .value.neg { color: var(--text-mute); }

/* --- Invest block --- */
.invest-block {
  margin-top: 1.6rem; background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius);
  padding: 1.4rem; box-shadow: var(--shadow-sm);
}
.invest-block .block-title { display: flex; align-items: center; gap: .5rem; margin-bottom: .3rem; }
.invest-block .block-title svg { width: 22px; height: 22px; color: var(--accent); flex: none; }
.invest-compare { display: grid; gap: 1rem; grid-template-columns: 1fr; margin-top: 1.1rem; }
@media (min-width: 720px) { .invest-compare { grid-template-columns: 1fr auto 1fr; align-items: center; } }
.invest-col { padding: 1.1rem; border-radius: var(--radius); border: 1.5px solid var(--border); text-align: center; }
.invest-col.amortiza { border-color: color-mix(in srgb, var(--amortiza-color) 45%, var(--border)); }
.invest-col.invierte { border-color: color-mix(in srgb, var(--invierte-color) 45%, var(--border)); }
.invest-col .tag { font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; }
.invest-col.amortiza .tag { color: var(--amortiza-color); }
.invest-col.invierte .tag { color: var(--invierte-color); }
.invest-col .amount { font-family: var(--display); font-size: 1.9rem; font-weight: 700; margin-top: .4rem; }
.invest-col .sub { font-size: .83rem; color: var(--text-mute); margin-top: .25rem; }
.invest-vs { font-family: var(--display); font-weight: 700; color: var(--text-mute); text-align: center; font-size: 1.1rem; }
.invest-verdict {
  margin-top: 1.1rem; text-align: center; font-weight: 700; padding: .8rem 1rem; border-radius: var(--radius-sm);
  background: var(--accent-soft); color: var(--accent-dark);
}
.risk-notice {
  display: flex; gap: .6rem; margin-top: 1.1rem; padding: .9rem 1rem; border-radius: var(--radius-sm);
  background: var(--warn-bg); color: var(--warn); font-size: .87rem; border: 1px solid color-mix(in srgb, var(--warn) 35%, transparent);
}
.risk-notice svg { width: 18px; height: 18px; flex: none; margin-top: .1rem; }
.risk-notice strong { display: block; margin-bottom: .15rem; }

.invest-controls { display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-end; margin-top: 1rem; }
.invest-controls .field { flex: 1 1 200px; }

/* --- Chart --- */
.chart-wrap { margin-top: 1.6rem; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: .7rem; font-size: .85rem; }
.chart-legend .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: .4rem; }
canvas#debtChart { width: 100%; height: 280px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }

/* --- Amortization table --- */
.table-block { margin-top: 1.6rem; }
.table-tabs { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: .8rem; }
.table-actions { display: flex; gap: .6rem; flex-wrap: wrap; margin: .8rem 0; }
.table-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table.amort-table { font-size: .9rem; min-width: 560px; }
table.amort-table th, table.amort-table td { padding: .6rem .8rem; text-align: right; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.amort-table th:first-child, table.amort-table td:first-child { text-align: left; }
table.amort-table thead th { background: var(--surface-2); font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; color: var(--text-soft); position: sticky; top: 0; }
table.amort-table tbody tr:hover { background: var(--surface-2); }
details.table-details summary { cursor: pointer; font-weight: 700; padding: .5rem 0; list-style: none; display: flex; align-items: center; gap: .4rem; }
details.table-details summary::-webkit-details-marker { display: none; }
details.table-details summary .chev { transition: transform .15s var(--ease-out); }
details.table-details[open] summary .chev { transform: rotate(90deg); }

/* --- Share --- */
.share-row { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: 1.2rem; }
.copy-feedback { font-size: .82rem; color: var(--good); font-weight: 700; opacity: 0; transition: opacity .2s; }
.copy-feedback.is-visible { opacity: 1; }

/* --- Ad slots --- */
.ad-slot {
  display: flex; align-items: center; justify-content: center;
  min-height: 90px; border: 1px dashed var(--border); border-radius: var(--radius-sm);
  background: var(--surface-2); color: var(--text-mute); font-size: .8rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; margin-block: 1.6rem;
}
.ad-slot.ad-leaderboard { min-height: 100px; }
.ad-slot.ad-incontent { min-height: 250px; max-width: 336px; margin-inline: auto; }

.ad-toast {
  position: fixed; bottom: 1rem; right: 1rem; z-index: 60;
  width: 220px; background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md); padding: .8rem; font-size: .78rem; color: var(--text-mute);
  display: none; align-items: flex-start; gap: .5rem;
}
.ad-toast.is-visible { display: flex; }
.ad-toast .close-toast { margin-left: auto; font-weight: 800; color: var(--text-soft); flex: none; }
.ad-toast .label { font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }

dialog.ad-dialog {
  border: none; border-radius: var(--radius); padding: 0; max-width: 380px; width: calc(100% - 2rem);
  box-shadow: var(--shadow-md);
}
dialog.ad-dialog::backdrop { background: rgba(10, 15, 25, .55); }
.ad-dialog-inner { padding: 1.3rem; }
.ad-dialog-inner .dialog-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: .8rem; }
.ad-dialog-inner .close-dialog { font-size: 1.3rem; line-height: 1; color: var(--text-mute); padding: .2rem .4rem; }
.ad-dialog-body {
  min-height: 220px; border: 1px dashed var(--border); border-radius: var(--radius-sm); background: var(--surface-2);
  display: flex; align-items: center; justify-content: center; color: var(--text-mute); font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; font-size: .85rem;
}
.ad-dialog-inner .dialog-foot { margin-top: 1rem; text-align: center; }

/* --- 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: .3rem 1rem;
}
.faq-item summary {
  cursor: pointer; list-style: none; padding: .8rem 0; font-weight: 700; display: flex; justify-content: space-between; gap: 1rem; align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chev { transition: transform .15s var(--ease-out); flex: none; color: var(--text-mute); }
.faq-item[open] summary .chev { transform: rotate(180deg); }
.faq-item .answer { padding-bottom: .9rem; color: var(--text-soft); max-width: 68ch; }

/* --- Related tools cards --- */
.tools-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 720px) { .tools-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .tools-grid { grid-template-columns: repeat(3, 1fr); } }
.tool-link-card {
  display: block; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.1rem; transition: border-color .15s var(--ease-out), transform .15s var(--ease-out);
}
.tool-link-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.tool-link-card h3 { font-size: 1rem; margin-bottom: .3rem; }
.tool-link-card p { font-size: .87rem; color: var(--text-mute); margin: 0; }

/* --- Disclaimer banner --- */
.disclaimer {
  display: flex; gap: .7rem; align-items: flex-start; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: .9rem 1rem; font-size: .85rem; color: var(--text-soft); margin-top: 1.4rem;
}
.disclaimer svg { width: 18px; height: 18px; flex: none; margin-top: .15rem; color: var(--text-mute); }

/* --- Cookie banner --- */
.cookie-banner {
  position: fixed; inset: auto 0 0 0; z-index: 80; background: var(--surface); border-top: 1px solid var(--border);
  box-shadow: var(--shadow-md); padding: 1rem 1.25rem; display: none;
}
.cookie-banner.is-visible { display: block; }
.cookie-banner .container { display: flex; flex-wrap: wrap; gap: .9rem; align-items: center; justify-content: space-between; }
.cookie-banner p { font-size: .85rem; color: var(--text-soft); max-width: 62ch; margin: 0; }
.cookie-actions { display: flex; gap: .6rem; flex-wrap: wrap; }

/* --- Legal pages --- */
.legal-page h2 { margin-top: 1.6rem; }
.legal-page .updated { color: var(--text-mute); font-size: .85rem; margin-bottom: 1.5rem; }

/* --- Footer --- */
.site-footer { border-top: 1px solid var(--border); padding-block: 2rem; margin-top: 2rem; }
.site-footer .container { display: flex; flex-direction: column; gap: 1rem; }
.footer-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; align-items: center; }
.footer-links { display: flex; flex-wrap: wrap; gap: .3rem 1.2rem; list-style: none; padding: 0; margin: 0; }
.footer-links a { font-size: .85rem; color: var(--text-soft); }
.footer-links a:hover { color: var(--accent); }
.footer-note { font-size: .8rem; color: var(--text-mute); max-width: 72ch; }

/* =============================================================
   8. Responsive tweaks
   ============================================================= */
@media (min-width: 720px)  { .section { padding-block: 3rem; } }
@media (min-width: 960px)  { .section { padding-block: 3.6rem; } }
@media (min-width: 1280px) { .container { padding-inline: 1.5rem; } }

/* =============================================================
   9. Reduced motion — solo lo intrusivo
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* =============================================================
   Print
   ============================================================= */
@media print {
  .site-header, .site-footer, .ad-slot, .ad-toast, .cookie-banner, .tool-actions, .share-row, .invest-controls { display: none !important; }
  body { background: #fff; }
}