/* ==========================================================================
   Regla 183 — sistema de diseño
   Tono: cercano y legible. Papel cálido, formas suaves, tipografía grande.
   Los datos (fechas, días) siguen en monoespaciada para que se lean exactos,
   pero los rótulos hablan en lenguaje normal, no administrativo.

   Hoja de estilos autocontenida (sin Tailwind ni ningún runtime).

   Tres acentos con papeles distintos:
   --action   → interacción (foco, enlaces, botón principal, año activo)
   --accent   → identidad de marca (sello, avisos), decorativo
   --positive → se ha superado el umbral de 183 días (resultado)
   ========================================================================== */

:root {
  --ink: #23201c;
  --ink-soft: #5c554c;
  --ink-faint: #8b8377;
  --paper: #fbf8f3;
  --paper-raised: #ffffff;
  --paper-sunken: #f4efe6;
  --line: #e2dad0;
  --line-strong: #c6bcae;
  --accent: #17705d;
  --accent-soft: #e2f0ea;
  --action: #1f5ec4;
  --action-soft: #e6edfb;
  --positive: #8a5f12;
  --positive-soft: #f3e8d2;
  --alert: #a93a2c;
  --alert-soft: #fbeae6;
  --focus-ring: #1f5ec4;
  --shadow-soft: 0 1px 2px rgba(35, 32, 28, 0.04), 0 8px 24px -12px rgba(35, 32, 28, 0.10);

  --font-display: "Spectral", Georgia, "Times New Roman", serif;
  --font-body: "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --r-lg: 16px;
  --r-md: 12px;
  --r-sm: 9px;

  --container: 46rem;
  --space-page-x: 1.25rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #f2ece2;
    --ink-soft: #b5aca0;
    --ink-faint: #8d8478;
    --paper: #191713;
    --paper-raised: #22201b;
    --paper-sunken: #14120f;
    --line: #34302a;
    --line-strong: #4a443c;
    --accent: #66c4a7;
    --accent-soft: #1b2b26;
    --action: #8fb6f5;
    --action-soft: #1c2434;
    --positive: #e0b15c;
    --positive-soft: #332a17;
    --alert: #e89a8c;
    --alert-soft: #2e211d;
    --focus-ring: #8fb6f5;
    --shadow-soft: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 28px -14px rgba(0, 0, 0, 0.6);
  }
}

:root[data-theme="dark"] {
  --ink: #f2ece2;
  --ink-soft: #b5aca0;
  --ink-faint: #8d8478;
  --paper: #191713;
  --paper-raised: #22201b;
  --paper-sunken: #14120f;
  --line: #34302a;
  --line-strong: #4a443c;
  --accent: #66c4a7;
  --accent-soft: #1b2b26;
  --action: #8fb6f5;
  --action-soft: #1c2434;
  --alert: #e89a8c;
  --alert-soft: #2e211d;
  --focus-ring: #8fb6f5;
  --shadow-soft: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 28px -14px rgba(0, 0, 0, 0.6);
}

/* ---- reset ---- */

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--ink);
  text-wrap: balance;
  font-weight: 600;
  margin: 0;
}

p {
  text-wrap: pretty;
}

strong, b {
  font-weight: 600;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

svg {
  display: block;
}

.font-mono {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
}

.muted {
  color: var(--ink-soft);
}

.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;
}

::selection {
  background: var(--action-soft);
  color: var(--ink);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2.5px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3.5rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.7rem 1.1rem;
  border-radius: var(--r-sm);
  font-size: 0.95rem;
  z-index: 100;
  transition: top 0.15s ease;
}
.skip-link:focus {
  top: 1rem;
}

/* ---- page shell ---- */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-page-x);
}

.page-main {
  flex: 1 1 auto;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: 2rem var(--space-page-x) 3.5rem;
}

@media (min-width: 640px) {
  .page-main { padding-top: 3.25rem; }
}

/* ---- header ---- */

.masthead {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.header-bar {
  max-width: var(--container);
  margin-inline: auto;
  padding: 0.6rem var(--space-page-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
  text-decoration: none;
}

.seal {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  background: var(--accent-soft);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--accent);
  flex-shrink: 0;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
  border-radius: 999px;
  transition: color 0.15s ease, background-color 0.15s ease;
}
.nav-link:hover {
  color: var(--ink);
  background: var(--paper-sunken);
}
.nav-link[aria-current="page"] {
  color: var(--action);
  background: var(--action-soft);
  font-weight: 600;
}

.main-nav .nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0 0.8rem;
}

/* ---- theme toggle ---- */

.theme-toggle {
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid transparent;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--ink-soft);
  background: transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
  flex-shrink: 0;
}
.theme-toggle:hover { background: var(--paper-sunken); color: var(--ink); }

/* En móviles estrechos, "Fiscalidad Simple" + 2 enlaces + el botón de tema
   no caben en una fila: se deja solo el sello como logotipo compacto y se
   ajusta el espaciado de los enlaces para que nada quede cortado. */
@media (max-width: 30rem) {
  .header-bar .wordmark {
    display: none;
  }
  .main-nav {
    gap: 0.1rem;
  }
  .main-nav .nav-link {
    padding: 0 0.55rem;
    font-size: 0.88rem;
  }
}

/* ---- hero ---- */

.hero {
  margin-bottom: 2rem;
}

.eyebrow {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0 0 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--paper-sunken);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
}
.eyebrow::before {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

.hero h1 {
  font-size: 2.1rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 0.8rem;
}
@media (min-width: 640px) {
  .hero h1 { font-size: 2.7rem; }
}

.lede {
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 34rem;
  margin: 0;
}
.lede strong {
  color: var(--ink);
}

/* ==========================================================================
   Hoja de cálculo: pasos 1 · 2 · 3
   ========================================================================== */

.sheet {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper-raised);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.step {
  padding: 1.35rem var(--space-page-x);
  border-bottom: 1px solid var(--line);
}
@media (min-width: 640px) {
  .step { padding: 1.6rem 1.75rem; }
}

.step:last-child { border-bottom: none; }

.step-periods {
  background: color-mix(in srgb, var(--paper-raised) 55%, var(--paper-sunken) 45%);
}

.step-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.step-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.step-num {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--action);
  background: var(--action-soft);
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  flex: none;
}

/* ---- año natural ---- */

.year-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.year-btn {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 1rem;
  min-height: 2.9rem;
  padding: 0 1.05rem;
  background: var(--paper);
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease, transform 0.12s ease;
}
.year-btn:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}
.year-btn:active { transform: scale(0.97); }
.year-btn[aria-pressed="true"] {
  border-color: var(--action);
  background: var(--action-soft);
  color: var(--action);
  font-weight: 600;
}

.year-note {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0.9rem 0 0;
}
.year-note strong {
  color: var(--ink);
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  font-weight: 600;
}

.field-label {
  font-size: 0.9rem;
  color: var(--ink-soft);
  display: block;
  margin-bottom: 0.35rem;
}

/* ---- section (páginas de contenido) ---- */

.section {
  margin-bottom: 2rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.section-label {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--ink);
  margin: 0;
  font-weight: 600;
}

.btn-text {
  font-size: 0.92rem;
  color: var(--ink-soft);
  background: none;
  border: 1px solid transparent;
  border-radius: 999px;
  min-height: 2.5rem;
  padding: 0 0.8rem;
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}
.btn-text:hover {
  color: var(--ink);
  background: var(--paper-sunken);
}

/* ==========================================================================
   Periodos de estancia
   ========================================================================== */

.ledger {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.ledger-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "idx  days  del"
    "start start start"
    "end   end   end";
  gap: 0.7rem 0.75rem;
  align-items: center;
  padding: 0.85rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper);
  transition: border-color 0.15s ease;
}
.ledger-row:hover,
.ledger-row:focus-within {
  border-color: var(--line-strong);
}

@media (min-width: 30rem) {
  .ledger-row {
    grid-template-columns: auto 1fr 1fr auto;
    grid-template-areas:
      "idx  days  days  del"
      "start start end  end";
  }
}

@media (min-width: 40rem) {
  .ledger-row {
    grid-template-columns: 1.9rem 1fr 1fr 5.5rem 2.75rem;
    grid-template-areas: "idx start end days del";
    align-items: end;
    gap: 0.9rem;
  }
}

.ledger-row.is-entering {
  animation: rowIn 0.24s cubic-bezier(0.22, 1, 0.36, 1);
}
.ledger-row.is-leaving {
  animation: rowOut 0.18s ease-in forwards;
  pointer-events: none;
}

@keyframes rowIn {
  from { opacity: 0; transform: translateY(-8px) scale(0.99); }
  to   { opacity: 1; transform: none; }
}
@keyframes rowOut {
  from { opacity: 1; }
  to   { opacity: 0; transform: translateY(-4px); }
}

.ledger-index {
  grid-area: idx;
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-faint);
  align-self: center;
}

.ledger-field { min-width: 0; }
.ledger-field.is-start { grid-area: start; }
.ledger-field.is-end { grid-area: end; }

@media (min-width: 40rem) {
  .ledger-field .field-label { margin-bottom: 0.3rem; }
}

.date-input {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 1rem;
  min-height: 2.9rem;
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  color: var(--ink);
  padding: 0.5rem 0.7rem;
  width: 100%;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.date-input:hover {
  border-color: var(--ink-faint);
}
.date-input:focus {
  border-color: var(--action);
  box-shadow: 0 0 0 3px var(--action-soft);
  outline: none;
}
.date-input.invalid {
  border-color: var(--alert);
  color: var(--alert);
}
.date-input:focus-visible {
  outline: 2.5px solid var(--focus-ring);
  outline-offset: 2px;
}
.date-input::-webkit-calendar-picker-indicator {
  opacity: 0.6;
  cursor: pointer;
}
.date-input:hover::-webkit-calendar-picker-indicator,
.date-input:focus::-webkit-calendar-picker-indicator {
  opacity: 1;
}
:root[data-theme="dark"] .date-input::-webkit-calendar-picker-indicator {
  filter: invert(0.85);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .date-input::-webkit-calendar-picker-indicator {
    filter: invert(0.85);
  }
}

.row-days {
  grid-area: days;
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  color: var(--ink-soft);
  font-size: 0.85rem;
  align-self: center;
  justify-self: end;
  text-align: right;
  white-space: nowrap;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: var(--paper-sunken);
}
.row-days.is-empty {
  background: transparent;
  color: var(--ink-faint);
}
.row-days.is-invalid {
  color: var(--alert);
  background: var(--alert-soft);
}

@media (min-width: 40rem) {
  .row-days {
    background: transparent;
    padding: 0;
  }
  .row-days.is-invalid { background: transparent; }
}

.remove-row {
  grid-area: del;
  align-self: center;
  justify-self: end;
  color: var(--ink-soft);
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid transparent;
  background: none;
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease, opacity 0.15s ease;
}
.remove-row:hover {
  color: var(--alert);
  background: var(--alert-soft);
}
.remove-row:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  background: none;
}

.btn-add {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--action);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  width: 100%;
  margin-top: 0.8rem;
  min-height: 2.9rem;
  padding: 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.12s ease;
}
.btn-add:hover {
  border-color: var(--action);
  background: var(--action-soft);
}
.btn-add:active { transform: scale(0.985); }

/* ==========================================================================
   Resultado
   ========================================================================== */

.verdict-panel {
  background: var(--paper-sunken);
}

.verdict-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.gauge {
  position: relative;
  width: 12.5rem;
  height: 12.5rem;
  flex: none;
  margin-bottom: 1.9rem;
}
@media (min-width: 34rem) {
  .gauge { width: 14rem; height: 14rem; }
}

.gauge-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.gauge-track {
  fill: none;
  stroke: var(--line);
  stroke-width: 11;
}

.gauge-arc {
  fill: none;
  stroke: var(--ink-faint);
  stroke-width: 11;
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: 70px 70px;
  stroke-dasharray: 364.42;
  stroke-dashoffset: 364.42;
  transition: stroke-dashoffset 0.55s cubic-bezier(0.22, 1, 0.36, 1), stroke 0.3s ease;
}
.gauge-arc.is-resident {
  stroke: var(--positive);
}

.gauge-threshold {
  stroke: var(--ink-soft);
  stroke-width: 2;
  stroke-linecap: round;
}

.gauge-threshold-label {
  position: absolute;
  left: 50%;
  bottom: -0.4rem;
  transform: translate(-50%, 100%);
  font-size: 0.78rem;
  color: var(--ink-soft);
  white-space: nowrap;
}

.gauge-center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.1rem;
  text-align: center;
}

.day-count {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  font-size: 3.1rem;
  color: var(--ink);
  transition: color 0.3s ease;
}
.gauge:has(.gauge-arc.is-resident) .day-count {
  color: var(--positive);
}

.day-unit {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.gauge-caption {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0.9rem 0 0;
}

.verdict-body {
  max-width: 30rem;
  margin: 1.2rem auto 0;
}

.stamp {
  font-weight: 600;
  border: 1px solid currentColor;
  padding: 0.6rem 0.95rem 0.6rem 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  border-radius: 999px;
  font-size: 1rem;
  line-height: 1.35;
  text-align: left;
  color: var(--ink-soft);
  background: var(--paper-raised);
  transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}
.stamp.is-resident {
  color: var(--positive);
  background: var(--positive-soft);
}
.stamp.is-not-resident {
  color: var(--ink-soft);
  background: var(--paper-raised);
}

.stamp-glyph {
  font-size: 0.95em;
  flex: none;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  display: inline-grid;
  place-items: center;
  line-height: 1;
}

.verdict-detail {
  font-size: 1.05rem;
  color: var(--ink);
  margin: 0.9rem 0 0;
  line-height: 1.6;
}

.verdict-overlap-note {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0.8rem 0 0;
  padding: 0.7rem 0.85rem;
  background: var(--paper-raised);
  border-radius: var(--r-sm);
}

/* ---- avisos ---- */

.notice {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper-raised);
  padding: 1.1rem 1.2rem;
  margin-top: 1.5rem;
  display: flex;
  gap: 0.85rem;
}

.notice-icon {
  flex: none;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 600;
  font-size: 0.95rem;
  margin-top: 0.1rem;
}

.notice-muted {
  padding: 0;
  margin-top: 1.5rem;
}

.notice p,
.notice-muted p {
  font-size: 0.98rem;
  line-height: 1.65;
  margin: 0;
}

.notice-muted p {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.notice-muted strong {
  color: var(--ink);
}

.notice-muted a,
.notice a {
  color: var(--action);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.notice-muted a:hover,
.notice a:hover {
  text-decoration-color: transparent;
}

/* ---- páginas de contenido (info / faq) ---- */

.prose-doc {
  max-width: 38rem;
}
.prose-doc p {
  color: var(--ink);
  line-height: 1.75;
  margin: 0;
}
.prose-doc p + p {
  margin-top: 1.1rem;
}

.page-main > h2 {
  font-size: 1.65rem;
  margin-top: 2.75rem;
  margin-bottom: 0.9rem;
}

.doc-panel {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-soft);
  padding: 1.35rem;
  margin: 2rem 0;
}

.clause + .clause {
  margin-top: 1.35rem;
  padding-top: 1.35rem;
  border-top: 1px solid var(--line);
}

.clause-title {
  margin: 0 0 0.6rem;
  font-size: 1.15rem;
}

.clause-number {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85em;
}

.clause-body {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0;
}
.clause-body strong {
  color: var(--ink);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 2.5rem;
  min-height: 2.75rem;
  padding: 0 0.9rem 0 0.7rem;
  border-radius: 999px;
  background: var(--paper-sunken);
  font-size: 0.98rem;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.15s ease, background-color 0.15s ease;
}
.back-link:hover {
  color: var(--action);
  background: var(--action-soft);
}

/* ---- FAQ ---- */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

details.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper-raised);
  padding: 0 1.1rem;
  transition: border-color 0.15s ease;
}
details.faq-item[open] {
  border-color: var(--line-strong);
}
details.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  font-size: 1.15rem;
  line-height: 1.45;
  padding: 1.05rem 0;
  transition: color 0.15s ease;
}
details.faq-item summary:hover { color: var(--action); }
details.faq-item summary::-webkit-details-marker { display: none; }

.faq-marker {
  font-family: var(--font-body);
  color: var(--action);
  transition: transform 0.2s ease;
  flex-shrink: 0;
  margin-top: 0.15em;
}
details.faq-item[open] .faq-marker { transform: rotate(45deg); }

.faq-answer {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 36rem;
  margin: 0 0 1.1rem;
}
.faq-answer strong {
  color: var(--ink);
}
.faq-answer a {
  color: var(--action);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---- footer ---- */

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: auto;
}

.footer-bar {
  max-width: var(--container);
  margin-inline: auto;
  padding: 2.25rem var(--space-page-x) 1.5rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  margin-bottom: 1.75rem;
}
@media (min-width: 36rem) {
  .footer-grid {
    grid-template-columns: 1.3fr 1fr 1fr;
    gap: 1.5rem;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  margin-bottom: 0.6rem;
}
.footer-brand .wordmark { font-size: 1.05rem; }

.footer-tagline {
  font-size: 0.9rem;
  color: var(--ink-soft);
  max-width: 22rem;
  margin: 0;
}

.footer-col-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  font-size: 0.92rem;
  color: var(--ink-soft);
  text-decoration: none;
}
.footer-col a:hover {
  color: var(--action);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-legal {
  padding-top: 1.35rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--ink-faint);
}
.footer-legal p { margin: 0; }
.footer-legal p + p { margin-top: 0.4rem; }

/* ---- también puede interesarte ---- */

.related-tools {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper-raised);
  padding: 1.1rem 1.2rem;
  margin: 2.5rem 0 1.5rem;
}
.related-tools .eyebrow {
  margin-bottom: 0.6rem;
}
.related-tools .cross-link {
  margin-top: 0;
  font-size: 1.05rem;
  font-weight: 600;
}
.related-tools p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0.35rem 0 0;
}

/* ---- página de inicio: tarjetas de herramientas ---- */

.tool-grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}
@media (min-width: 36rem) {
  .tool-grid { grid-template-columns: 1fr 1fr; }
}

.tool-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper-raised);
  box-shadow: var(--shadow-soft);
  padding: 1.5rem;
}

.tool-card .eyebrow {
  margin-bottom: 0.9rem;
}

.tool-card h3 {
  font-size: 1.35rem;
  margin: 0 0 0.5rem;
}

.tool-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0 0 1.3rem;
  flex: 1;
}

.tool-card .cross-link {
  margin-top: 0;
  font-size: 1rem;
  font-weight: 600;
}

.tools-note {
  font-size: 0.9rem;
  color: var(--ink-faint);
  margin: 0 0 2rem;
}

/* ---- 404 ---- */

.error-page {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  max-width: var(--container);
  width: 100%;
  margin-inline: auto;
  padding: 3rem var(--space-page-x);
}
.error-page .eyebrow { margin-bottom: 0.9rem; }
.error-page h1 { font-size: 2.1rem; margin-bottom: 0.8rem; }

/* ==========================================================================
   Asistente Modelo 720 (mismo lenguaje visual que la calculadora de la
   regla de los 183: .sheet, .stamp, .verdict-detail, .year-btn se
   reutilizan tal cual; estas clases son las que le son propias)
   ========================================================================== */

.wizard-progress {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  margin: 0 0 0.9rem;
}

.wizard-step {
  animation: wizardIn 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes wizardIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.wizard-question {
  font-size: 1.3rem;
  line-height: 1.3;
  margin: 0 0 0.6rem;
}
@media (min-width: 640px) {
  .wizard-question { font-size: 1.5rem; }
}
/* El foco en tabindex="-1" es solo para que el lector de pantalla anuncie
   la nueva pregunta al cambiar de paso; no debe verse un recuadro. */
.wizard-question:focus-visible,
.wizard-question:focus {
  outline: none;
}

.wizard-help {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 32rem;
  margin: 0 0 1.3rem;
}

.wizard-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.4rem;
}

.choice-btn {
  font-family: var(--font-body);
  font-size: 1rem;
  min-height: 2.9rem;
  padding: 0 1.15rem;
  background: var(--paper);
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease, transform 0.12s ease;
}
.choice-btn:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}
.choice-btn:active { transform: scale(0.97); }
.choice-btn[aria-pressed="true"] {
  border-color: var(--action);
  background: var(--action-soft);
  color: var(--action);
  font-weight: 600;
}

.value-field {
  max-width: 20rem;
  margin-bottom: 0.4rem;
}

.value-input-row {
  position: relative;
  display: flex;
  align-items: center;
}

.value-input {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 1.1rem;
  min-height: 2.9rem;
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  color: var(--ink);
  padding: 0.5rem 2.3rem 0.5rem 0.7rem;
  width: 100%;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  -moz-appearance: textfield;
  appearance: textfield;
}
.value-input::-webkit-outer-spin-button,
.value-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.value-input:hover { border-color: var(--ink-faint); }
.value-input:focus {
  border-color: var(--action);
  box-shadow: 0 0 0 3px var(--action-soft);
  outline: none;
}
.value-input:focus-visible {
  outline: 2.5px solid var(--focus-ring);
  outline-offset: 2px;
}

.value-input-suffix {
  position: absolute;
  right: 0.85rem;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  pointer-events: none;
}

.wizard-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.wizard-nav .btn-add {
  width: auto;
  margin-top: 0;
  padding: 0.7rem 1.4rem;
}

/* ---- resultado del asistente ---- */

.result-breakdown {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.result-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink-soft);
}

.result-item-icon {
  flex: none;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  display: inline-grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 600;
  margin-top: 0.05rem;
}
.result-item.is-flagged { color: var(--positive); }
.result-item.is-clear { color: var(--ink-faint); }

.result-callout {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--r-sm);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--ink-soft);
}
.result-callout strong { color: var(--ink); }

.cross-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: var(--action);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.cross-link:hover { text-decoration-color: transparent; }