/* ─────────────────────────────────────────────────────────────────────────────
   Calculadora de Hipotecas — stylesheet
   ───────────────────────────────────────────────────────────────────────────── */

/* ── Custom properties ─────────────────────────────────────────────────────── */
:root {
  /* Fondo oscuro y elegante */
  --color-bg:          #0d0e15;
  --color-surface:     #161822;
  --color-border:      #2b2e3e;
  --color-border-dark: #3a3f55;

  /* Tonos vibrantes y neones (menos serios) */
  --color-primary:     #7c3aed; /* Púrpura */
  --color-primary-lt:  #8b5cf6;
  --color-primary-bg:  rgba(124, 58, 237, 0.15);
  --color-accent:      #f43f5e; /* Rosa/Rojo */
  --color-accent-bg:   rgba(244, 63, 94, 0.15);
  --color-variable:    #fbbf24; /* Amarillo dorado */
  --color-variable-bg: rgba(251, 191, 36, 0.15);

  /* Texto claro para modo oscuro */
  --color-text:        #f8fafc;
  --color-text-muted:  #94a3b8;
  --color-text-inv:    #ffffff;

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

  /* Sombras con un sutil efecto neón */
  --shadow-sm: 0 4px 12px rgba(0,0,0,0.25);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.30);
  --shadow-lg: 0 16px 40px rgba(124, 58, 237, 0.20);

  /* Nueva fuente moderna y con personalidad */
  --font: 'Outfit', system-ui, -apple-system, sans-serif;
}

/* ── Reset & base ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

/* ── Container ──────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Header ─────────────────────────────────────────────────────────────────── */
.site-header {
  background: linear-gradient(135deg, #6228d7, #ec4899);
  color: var(--color-text-inv);
  padding: 60px 0 50px;
  text-align: center;
  position: relative;
  box-shadow: 0 4px 30px rgba(236,72,153,0.3);
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 20px;
  background: linear-gradient(to top, var(--color-bg), transparent);
}

.site-header h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.site-header h1 span {
  color: #fbbf24;
  display: inline-block;
  transform: rotate(-2deg);
  text-shadow: 0 4px 15px rgba(251, 191, 36, 0.4);
}

.subtitle {
  font-size: 1rem;
  opacity: 0.80;
  max-width: 520px;
  margin: 0 auto;
}

/* ── Section titles ─────────────────────────────────────────────────────────── */
.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}

/* ── Cards section ──────────────────────────────────────────────────────────── */
.cards-section {
  padding: 48px 0 0;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ── Mortgage card ──────────────────────────────────────────────────────────── */
.mortgage-card {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.mortgage-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-lt);
}

.mortgage-card:focus-visible {
  outline: 3px solid var(--color-primary-lt);
  outline-offset: 2px;
}

.mortgage-card--selected {
  border-color: var(--color-primary);
  border-width: 2px;
  box-shadow: 0 0 0 3px rgba(27,79,114,0.15), var(--shadow-md);
}

.card-header {
  background: var(--color-primary-bg);
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  min-height: 70px;
}

.mortgage-card--mixed .card-header {
  background: var(--color-variable-bg);
}

.bank-logo {
  max-height: 38px;
  max-width: 160px;
  width: auto;
  object-fit: contain;
}

.bank-name-fallback {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-primary);
}

.card-body {
  padding: 18px 20px 16px;
  flex: 1;
}

.card-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.card-rates {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.rate-badge {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-text-inv);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 20px;
}

.rate-badge--variable {
  background: var(--color-variable);
}

.card-term {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 14px;
}

.card-payment {
  display: flex;
  flex-direction: column;
}

.payment-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.payment-value {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.card-note {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 6px;
  font-style: italic;
}

.card-cta {
  width: 100%;
  display: block;
  background: var(--color-bg);
  padding: 14px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  border: none;
  border-top: 1px solid var(--color-border);
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
  font-family: var(--font);
}

.mortgage-card:hover .card-cta,
.card-cta:hover {
  background: var(--color-primary);
  color: var(--color-text-inv);
}

/* ── Calculator section ─────────────────────────────────────────────────────── */
.calculator-section {
  padding: 48px 0 0;
}

.calculator-card {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

/* ── Tabs ───────────────────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  background: var(--color-bg);
}

.tab {
  padding: 14px 28px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.tab:hover {
  color: var(--color-primary);
}

.tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.tab:focus-visible {
  outline: 2px solid var(--color-primary-lt);
  outline-offset: -2px;
}

/* ── Tab panels ─────────────────────────────────────────────────────────────── */
.tab-panel {
  padding: 28px 28px 24px;
}

/* ── Form grid ──────────────────────────────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 24px;
  margin-bottom: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

/* ── Input wrapper ──────────────────────────────────────────────────────────── */
.input-wrapper {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--color-border-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.input-wrapper:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(27,79,114,0.12);
}

.input-wrapper input[type="number"] {
  flex: 1;
  border: none;
  outline: none;
  padding: 10px 14px;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--color-text);
  background: transparent;
  min-width: 0;
  -moz-appearance: textfield;
  appearance: textfield;
}

.input-wrapper input[type="number"]::-webkit-inner-spin-button,
.input-wrapper input[type="number"]::-webkit-outer-spin-button {
  opacity: 0.4;
}

.input-unit {
  padding: 10px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border-left: 1.5px solid var(--color-border);
  white-space: nowrap;
}

/* ── TIN/TAE toggle ─────────────────────────────────────────────────────────── */
.rate-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.rate-toggle {
  display: flex;
  gap: 0;
  border: 1.5px solid var(--color-border-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
}

.radio-label {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.radio-label input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-label span {
  display: block;
  padding: 9px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg);
  transition: background 0.15s, color 0.15s;
  user-select: none;
}

.radio-label:first-child span {
  border-right: 1px solid var(--color-border);
}

.radio-label input[type="radio"]:checked + span {
  background: var(--color-primary);
  color: var(--color-text-inv);
}

.radio-label input[type="radio"]:focus-visible + span {
  outline: 2px solid var(--color-primary-lt);
  outline-offset: -2px;
}

.rate-row .input-wrapper {
  flex: 1;
}

.rate-hint {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  min-height: 1.2em;
  margin-top: 2px;
}

/* ── Mixed variable display ─────────────────────────────────────────────────── */
.mixto-variable-info {
  font-size: 0.875rem;
  color: var(--color-variable);
  font-weight: 500;
  background: var(--color-variable-bg);
  border: 1px solid #F9E79F;
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin-bottom: 24px;
  min-height: 40px;
}

/* ── Calculate button ───────────────────────────────────────────────────────── */
.btn-calcular {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-text-inv);
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.25s ease;
  letter-spacing: 0.02em;
  box-shadow: 0 6px 15px rgba(244, 63, 94, 0.4);
}

.btn-calcular:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(244, 63, 94, 0.6);
  filter: brightness(1.1);
}

.btn-calcular:active {
  transform: scale(0.98);
}

.btn-calcular:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

/* ── Results section ────────────────────────────────────────────────────────── */
.results-section {
  padding: 48px 0 0;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

/* For mixed mortgage that shows 4 stat cards */
.results-grid.results-grid--4 {
  grid-template-columns: repeat(2, 1fr);
}

.stat-card {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
}

.stat-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
  margin-bottom: 4px;
}

.stat-sub {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ── Amortization toggle ────────────────────────────────────────────────────── */
.amortization-toggle-row {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.btn-toggle-table {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  background: var(--color-surface);
  color: var(--color-primary);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  border: 1.5px solid var(--color-primary);
  border-radius: 24px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.btn-toggle-table:hover {
  background: var(--color-primary-bg);
}

.btn-toggle-table:focus-visible {
  outline: 3px solid var(--color-primary-lt);
  outline-offset: 2px;
}

.toggle-arrow {
  font-size: 0.75rem;
  transition: transform 0.2s;
}

/* ── Amortization table ─────────────────────────────────────────────────────── */
.amortization-wrapper {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.amortization-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

.amortization-table thead {
  background: var(--color-primary);
  color: var(--color-text-inv);
  position: sticky;
  top: 0;
}

.amortization-table th {
  padding: 12px 16px;
  text-align: right;
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.amortization-table th:first-child {
  text-align: left;
}

.amortization-table td {
  padding: 9px 16px;
  text-align: right;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
  color: var(--color-text);
}

.amortization-table td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--color-text-muted);
}

.amortization-table tbody tr:last-child td {
  border-bottom: none;
}

.amortization-table .row-alt {
  background: var(--color-bg);
}

.amortization-table .period-divider td {
  background: var(--color-variable-bg);
  color: var(--color-variable);
  font-weight: 600;
  font-size: 0.8rem;
  text-align: center;
  padding: 8px 16px;
  border-top: 2px solid #F9E79F;
  border-bottom: 2px solid #F9E79F;
}

/* ── Footer ─────────────────────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.5);
  font-size: 0.78rem;
  text-align: center;
  padding: 24px 0;
  margin-top: 64px;
}

/* ── Utility ─────────────────────────────────────────────────────────────────── */
.hidden {
  display: none !important;
}

/* ── Bonus Comparador ──────────────────────────────────────────────────────── */
.bonus-section {
  padding: 48px 0 0;
}

.bonus-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.bonus-card {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.bonus-card .card-header.highlight {
  background: var(--color-primary-bg);
  border-bottom: 2px solid var(--color-primary);
}

.bonus-card .card-header {
  padding: 16px 20px;
}

.bonus-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tin-base {
  background: var(--color-bg);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 0.95rem;
  border-left: 4px solid var(--color-primary);
}

.tin-base span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-left: 8px;
}

.bonus-items {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
  flex: 1;
}

.bonus-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.cost-input {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.cost-input input {
  width: 75px;
  padding: 4px 8px;
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font);
  text-align: right;
  transition: border-color 0.15s;
}

.cost-input input:focus {
  border-color: var(--color-primary);
  outline: none;
}

.bonus-results {
  background: var(--color-bg);
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.b-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.b-row.b-total {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--color-border-dark);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary-lt);
}

.b-row.b-tae {
  margin-top: 8px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-accent);
}

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .cards-grid,
  .bonus-grid {
    grid-template-columns: 1fr;
  }

  .results-grid,
  .results-grid.results-grid--4 {
    grid-template-columns: 1fr 1fr;
  }
}

/* ── Inline Utilities ───────────────────────────────────────────────────────── */
.mt-4 { margin-top: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.text-sm { font-size: 0.82rem; }
.text-gray { color: var(--color-text-muted); }

.card-bonuses {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 12px;
  border-radius: var(--radius-sm);
  margin-top: 16px;
}

.bonus-title-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: 4px 0 8px 0;
  user-select: none;
}
.bonus-title-wrapper:hover .bonus-title {
  color: var(--color-primary-lt);
}
.bonus-toggle-icon {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  transition: transform 0.2s ease;
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }

  .site-header { padding: 36px 0 28px; }

  .cards-section,
  .calculator-section,
  .results-section { padding-top: 36px; }

  .tab-panel { padding: 20px 16px 20px; }

  .form-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .form-group--full {
    grid-column: 1;
  }

  .rate-row {
    flex-direction: column;
    align-items: stretch;
  }

  .rate-toggle {
    width: 100%;
    justify-content: stretch;
  }

  .radio-label { flex: 1; }
  .radio-label span { text-align: center; width: 100%; }

  .results-grid,
  .results-grid.results-grid--4 {
    grid-template-columns: 1fr;
  }

  .stat-value { font-size: 1.4rem; }

  .payment-value { font-size: 1.3rem; }

  .site-footer { margin-top: 48px; }
}