/* ==========================================================================
   CalculaTodo — Sistema de diseño
   ========================================================================== */

:root {
  --color-bg: #f6f8fb;
  --color-surface: #ffffff;
  --color-border: #e4e9f1;
  --color-text: #16233b;
  --color-text-soft: #4d5e79;
  --color-primary: #2f5fde;
  --color-primary-dark: #234bb5;
  --color-primary-soft: #eaf0ff;
  --color-accent: #0da678;
  --color-accent-soft: #e6f7f1;
  --color-warn: #d97706;
  --color-danger: #dc2626;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 3px rgba(22, 35, 59, 0.06), 0 8px 24px rgba(22, 35, 59, 0.07);
  --shadow-sm: 0 1px 2px rgba(22, 35, 59, 0.08);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* Foco visible para navegación con teclado */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.5em; font-weight: 700; }
h1 { font-size: 1.9rem; letter-spacing: -0.02em; }
h2 { font-size: 1.4rem; letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --------------------------------------------------------------------------
   Cabecera
   -------------------------------------------------------------------------- */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--color-primary), #6c8ef5);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 1.05rem;
  font-weight: 800;
}
.logo em { font-style: normal; color: var(--color-primary); }
.logo .tld { color: var(--color-text-soft); font-weight: 700; font-size: 0.95rem; margin-left: 1px; }

.main-nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}
.main-nav a {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-soft);
}
.main-nav a:hover { background: var(--color-primary-soft); color: var(--color-primary); text-decoration: none; }
.main-nav a.active { background: var(--color-primary); color: #fff; }

/* --------------------------------------------------------------------------
   Migas de pan / hero
   -------------------------------------------------------------------------- */

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-soft);
  margin: 22px 0 10px;
}
.breadcrumb a { color: var(--color-text-soft); }
.breadcrumb span { margin: 0 6px; color: #b6c0d1; }

.page-intro { max-width: 720px; margin-bottom: 28px; }
.page-intro p { color: var(--color-text-soft); }

/* --------------------------------------------------------------------------
   Tarjetas y disposición de calculadora
   -------------------------------------------------------------------------- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 26px;
}

.calc-layout {
  display: grid;
  grid-template-columns: minmax(320px, 420px) 1fr;
  gap: 24px;
  align-items: start;
  margin-bottom: 40px;
}

@media (max-width: 860px) {
  .calc-layout { grid-template-columns: 1fr; }
  .main-nav { display: none; }
}

/* Formulario */
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}
.field .hint { font-weight: 400; color: var(--color-text-soft); }

.input-group {
  display: flex;
  align-items: stretch;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input-group:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}
.input-group input,
.input-group select {
  border: none;
  outline: none;
  font: inherit;
  padding: 12px 14px;
  width: 100%;
  min-width: 0;
  background: transparent;
  color: var(--color-text);
}
/* Los campos de fecha nativos necesitan altura consistente entre navegadores */
.input-group input[type="date"] {
  appearance: none;
  -webkit-appearance: none;
  min-height: 50px;
}
.input-group .affix {
  display: flex;
  align-items: center;
  padding: 0 12px;
  background: #f2f5fa;
  color: var(--color-text-soft);
  font-size: 0.9rem;
  font-weight: 600;
  border-left: 1px solid var(--color-border);
  white-space: nowrap;
}
.input-group .affix:first-child { border-left: none; border-right: 1px solid var(--color-border); }
.input-group select.unit {
  width: auto;
  background: #f2f5fa;
  border-left: 1px solid var(--color-border);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-soft);
  cursor: pointer;
  padding: 10px 8px;
}

.field-row { display: flex; gap: 12px; }
.field-row .field { flex: 1; }

/* Radios tipo segmento */
.segment {
  display: flex;
  background: #f2f5fa;
  border-radius: var(--radius-sm);
  padding: 4px;
  gap: 4px;
}
.segment label {
  flex: 1;
  text-align: center;
  padding: 8px 10px;
  border-radius: 7px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-soft);
  cursor: pointer;
  margin: 0;
  transition: all 0.15s;
}
.segment input { display: none; }
.segment input:checked + label,
.segment label:has(input:checked) {
  background: #fff;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: inherit;
  font-weight: 700;
  font-size: 1.02rem;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 26px;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-primary); color: #fff; width: 100%; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-ghost { background: transparent; color: var(--color-text-soft); }
.btn-ghost:hover { background: #f2f5fa; }

.form-actions { display: flex; gap: 10px; margin-top: 22px; }
.form-actions .btn-primary { flex: 1; }

details.advanced { margin: 8px 0 4px; }
details.advanced summary {
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  list-style: none;
  padding: 6px 0;
}
details.advanced summary::before { content: "+ "; }
details.advanced[open] summary::before { content: "− "; }

/* --------------------------------------------------------------------------
   Panel de resultados
   -------------------------------------------------------------------------- */

.results { position: sticky; top: 88px; }

.result-hero {
  background: linear-gradient(135deg, var(--color-primary), #5479e8);
  color: #fff;
  border-radius: var(--radius);
  padding: 22px 26px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.result-hero .label {
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0.85;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.result-hero .value {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  overflow-wrap: break-word;
}
/* Para resultados largos en texto (fechas, edad exacta…) */
.result-hero .value-sm {
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  overflow-wrap: break-word;
}
.result-hero .sub { font-size: 0.92rem; opacity: 0.85; margin-top: 2px; }

.result-hero.accent { background: linear-gradient(135deg, var(--color-accent), #34c497); }

/* Tabla de desglose */
.result-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.result-table th, .result-table td {
  text-align: left;
  padding: 10px 4px;
  border-bottom: 1px solid var(--color-border);
}
.result-table td:last-child, .result-table th:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.result-table tr:last-child td { border-bottom: none; }
.result-table .total td { font-weight: 700; border-top: 2px solid var(--color-text); }
.result-table th { color: var(--color-text-soft); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; }

/* Gráfico de dona */
.donut-wrap { display: flex; align-items: center; gap: 24px; margin: 18px 0; flex-wrap: wrap; }
.donut {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  position: relative;
  flex-shrink: 0;
}
.donut::after {
  content: "";
  position: absolute;
  inset: 22%;
  background: var(--color-surface);
  border-radius: 50%;
}
.legend { list-style: none; margin: 0; padding: 0; font-size: 0.9rem; }
.legend li { display: flex; align-items: center; gap: 9px; padding: 3px 0; }
.legend .dot { width: 12px; height: 12px; border-radius: 4px; flex-shrink: 0; }
.legend .pct { color: var(--color-text-soft); margin-left: auto; padding-left: 16px; font-variant-numeric: tabular-nums; }

/* Barra de escala (IMC / grasa corporal) */
.scale-bar { margin: 20px 0 8px; }
.scale-track {
  display: flex;
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
}
.scale-marker-wrap { position: relative; height: 20px; }
.scale-marker {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  width: 0; height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 10px solid var(--color-text);
  transition: left 0.4s ease;
}
.scale-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--color-text-soft);
  margin-top: 2px;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
}
.badge-ok { background: var(--color-accent-soft); color: var(--color-accent); }
.badge-warn { background: #fef3e2; color: var(--color-warn); }
.badge-danger { background: #fdeaea; color: var(--color-danger); }
.badge-info { background: var(--color-primary-soft); color: var(--color-primary); }

/* --------------------------------------------------------------------------
   Tabla de amortización / secciones informativas
   -------------------------------------------------------------------------- */

.section { margin: 44px 0; }
.section h2 { margin-bottom: 16px; }

.table-scroll { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--color-border); background: var(--color-surface); }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; min-width: 560px; }
.data-table th {
  background: #f2f5fa;
  text-align: right;
  padding: 11px 14px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-soft);
  position: sticky;
  top: 0;
}
.data-table th:first-child, .data-table td:first-child { text-align: left; }
.data-table td {
  padding: 9px 14px;
  text-align: right;
  border-top: 1px solid var(--color-border);
  font-variant-numeric: tabular-nums;
}
.data-table tbody tr:hover { background: #f8fafd; }

.prose { max-width: 760px; color: var(--color-text); }
.prose h3 { margin-top: 1.6em; }
.prose ul { padding-left: 22px; }

/* --------------------------------------------------------------------------
   Página de inicio: buscador y catálogo
   -------------------------------------------------------------------------- */

.hero {
  text-align: center;
  padding: 56px 0 40px;
}
.hero h1 { font-size: 2.5rem; margin-bottom: 10px; }
.hero p { color: var(--color-text-soft); font-size: 1.1rem; max-width: 560px; margin: 0 auto 28px; }

.search-box {
  max-width: 540px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 8px 6px 20px;
  box-shadow: var(--shadow);
  transition: border-color 0.15s;
}
.search-box:focus-within { border-color: var(--color-primary); }
.search-box svg { flex-shrink: 0; color: var(--color-text-soft); }
.search-box input {
  border: none;
  outline: none;
  font: inherit;
  font-size: 1.05rem;
  flex: 1;
  min-width: 0;
  background: transparent;
}

.category-section { margin: 40px 0; }
.category-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.category-head h2 { margin: 0; }
.category-head .count { color: var(--color-text-soft); font-size: 0.9rem; }

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.calc-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  color: var(--color-text);
}
.calc-card:hover {
  text-decoration: none;
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.calc-card .icon { font-size: 1.5rem; margin-bottom: 8px; }
.calc-card h3 { margin: 0 0 4px; font-size: 1rem; }
.calc-card p { margin: 0; font-size: 0.85rem; color: var(--color-text-soft); }

.no-results { text-align: center; color: var(--color-text-soft); padding: 40px 0; display: none; }

/* Relacionadas */
.related-list { display: flex; flex-wrap: wrap; gap: 10px; }
.related-list a {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 600;
}
.related-list a:hover { border-color: var(--color-primary); text-decoration: none; }

/* --------------------------------------------------------------------------
   Pie de página
   -------------------------------------------------------------------------- */

.site-footer {
  margin-top: 64px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  font-size: 0.88rem;
  color: var(--color-text-soft);
}
.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }

@media (max-width: 640px) {
  h1 { font-size: 1.55rem; }
  .hero h1 { font-size: 1.9rem; }
  .card { padding: 20px; }
  .result-hero .value { font-size: 1.8rem; }
  .results { position: static; }
}