:root {
    --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

    --color-bg: #eef2f7;
    --color-surface: #ffffff;
    --color-text: #17263a;
    --color-muted: #5b6573;
    --color-primary: #0b5cad;
    --color-primary-dark: #0a3d74;
    --color-primary-soft: #e7f0fa;
    --color-accent: #f59e0b;
    --color-accent-dark: #b45309;
    --color-teal: #0f766e;
    --color-success: #0f7b4a;
    --color-error: #c62828;
    --color-error-bg: #fdeef0;
    --color-border: #dfe5ec;

    --color-header-from: #0a3d74;
    --color-header-to: #0e7cc4;

    --shadow-sm: 0 1px 2px rgba(10, 25, 47, 0.06);
    --shadow-md: 0 8px 20px -8px rgba(10, 25, 47, 0.14);
    --shadow-lg: 0 22px 45px -22px rgba(10, 25, 47, 0.32);

    --space: 1rem;
    --radius: 14px;
    --radius-sm: 9px;
    --max-width: 960px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background: linear-gradient(180deg, #f8fafc 0%, var(--color-bg) 100%) fixed;
    color-scheme: light;
}

h1,
h2,
h3 {
    line-height: 1.25;
    color: var(--color-text);
}

h1 {
    margin-top: 0;
    font-size: clamp(1.65rem, 4vw, 2.3rem);
}

h2 {
    margin-top: calc(var(--space) * 2);
    font-size: 1.4rem;
}

h3 {
    font-size: 1.15rem;
}

a {
    color: var(--color-primary);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

[hidden] {
    display: none !important;
}

.visually-hidden {
    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(--color-primary);
    color: #ffffff;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    padding: 0.5rem 1rem;
    background: var(--color-primary);
    color: #ffffff;
    border-radius: 0 0 var(--radius-sm) 0;
    z-index: 10;
}

.skip-link:focus {
    left: 0;
}

/* Cabecera */
.site-header {
    background: linear-gradient(135deg, var(--color-header-from), var(--color-header-to) 65%, #1090d6);
    color: #ffffff;
    box-shadow: 0 3px 12px rgba(10, 25, 47, 0.22);
    position: sticky;
    top: 0;
    z-index: 20;
}

.site-header__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0.85rem var(--space);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space);
    flex-wrap: wrap;
}

.site-header__name {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.01em;
}

.site-header__name a {
    color: #ffffff;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.site-header__name a::before {
    content: "€";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.7rem;
    height: 1.7rem;
    border-radius: 0.55rem;
    background: rgba(255, 255, 255, 0.16);
    color: #ffd166;
    font-size: 1.1rem;
    font-weight: 700;
}

.site-nav__list {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-nav__list a {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.site-nav__list a:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
}

.site-nav__list a[aria-current="page"] {
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.28);
}

main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--space) * 1.5) var(--space) 2.5rem;
}

/* Cabecera de página con barra de acento */
main > h1 {
    position: relative;
    padding-bottom: 0.75rem;
    margin-bottom: 0.5rem;
}

main > h1::after {
    content: "";
    display: block;
    width: 68px;
    height: 4px;
    border-radius: 2px;
    margin-top: 0.4rem;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

/* Pie */
.site-footer {
    background: var(--color-header-from);
    margin-top: 3rem;
}

.site-footer__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.25rem var(--space);
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
}

@media (min-width: 48rem) {
    :root {
        --space: 1.25rem;
    }
}

/* Calculadora */
.calc {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: calc(var(--space) * 1.1);
    margin: calc(var(--space) * 1.75) 0;
    box-shadow: var(--shadow-md);
}

.calc__field {
    margin-bottom: var(--space);
}

.calc__field label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.calc__field input {
    width: 100%;
    min-height: 3rem;
    padding: 0.6rem 0.85rem;
    font-size: 1.05rem;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-sm);
    box-shadow: inset 0 1px 2px rgba(10, 25, 47, 0.04);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.calc__field input:focus-visible {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(11, 92, 173, 0.16);
    outline: none;
}

.calc__field input[aria-invalid="true"] {
    border-color: var(--color-error);
    background: var(--color-error-bg);
}

.calc__field input[aria-invalid="true"]:focus-visible {
    box-shadow: 0 0 0 4px rgba(198, 40, 40, 0.14);
}

.calc__hint {
    margin: 0.3rem 0 0;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.calc__error {
    margin: 0.3rem 0 0;
    min-height: 1.4em;
    font-size: 0.875rem;
    color: var(--color-error);
    font-weight: 500;
}

.calc-invalid {
    min-height: 1.5em;
    margin: 0;
    font-weight: 600;
    color: var(--color-error);
}

/* Resultado */
.calc-result {
    display: block;
    margin-top: var(--space);
    padding: calc(var(--space) * 1.1);
    border: 1px solid var(--color-border);
    border-left: 5px solid var(--color-primary);
    border-radius: var(--radius);
    background: linear-gradient(180deg, #ffffff 0%, var(--color-primary-soft) 100%);
    box-shadow: var(--shadow-md);
}

.calc-result__label {
    margin: 0;
    font-size: 0.9rem;
    color: var(--color-primary-dark);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.calc-result__value {
    margin: 0.35rem 0 0;
    font-size: clamp(1.9rem, 6vw, 2.7rem);
    font-weight: 800;
    line-height: 1.15;
    color: var(--color-primary-dark);
    font-variant-numeric: tabular-nums;
}

.calc-result__stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.6rem calc(var(--space) * 2);
    margin: var(--space) 0 0;
}

.calc-result__stats div {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--space);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.85rem;
    box-shadow: var(--shadow-sm);
}

.calc-result__stats dt {
    color: var(--color-muted);
    font-size: 0.92rem;
}

.calc-result__stats dd {
    margin: 0;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

@media (min-width: 40rem) {
    .calc-result__stats {
        grid-template-columns: 1fr 1fr;
    }
}

.calc-result__chart {
    margin-top: var(--space);
}

.calc-result__chart svg {
    display: block;
    width: 100%;
    height: 0.9rem;
    border-radius: 6px;
    overflow: hidden;
    background: #e2e8f0;
}

.chart-bar--capital {
    fill: var(--color-primary);
}

.chart-bar--interest {
    fill: var(--color-accent);
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0 var(--space);
    margin: 0.6rem 0 0;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.chart-legend strong {
    color: var(--color-text);
    font-variant-numeric: tabular-nums;
}

.chart-swatch {
    display: inline-block;
    width: 0.75rem;
    height: 0.75rem;
    margin-right: 0.3rem;
    border-radius: 3px;
    vertical-align: -1px;
}

.chart-swatch--capital {
    background: var(--color-primary);
}

.chart-swatch--interest {
    background: var(--color-accent);
}

/* Cuadro de amortización */
.amortization {
    margin: calc(var(--space) * 1.75) 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.9rem 1.05rem;
    box-shadow: var(--shadow-sm);
}

.amortization summary {
    cursor: pointer;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-text);
    padding: 0.35rem 0;
}

.amortization summary::marker,
.faq__item summary::marker {
    color: var(--color-primary);
}

.amortization__status {
    margin: 0.6rem 0;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.amortization__table-wrap {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
}

.amortization__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
}

.amortization__table th,
.amortization__table td {
    padding: 0.55rem 0.7rem;
    text-align: right;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.amortization__table th:first-child,
.amortization__table td:first-child {
    text-align: left;
}

.amortization__table thead th {
    background: var(--color-primary-soft);
    color: var(--color-primary-dark);
    font-weight: 700;
}

.amortization__table tbody tr:nth-child(even) td {
    background: #f8fafc;
}

.amortization__table tbody tr:hover td {
    background: #eef4fa;
}

.amortization__table tbody tr:last-child td {
    border-bottom: 0;
}

.button {
    display: inline-block;
    margin-top: var(--space);
    padding: 0.7rem 1.4rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-sans);
    color: #ffffff;
    background: linear-gradient(180deg, #1472c6, var(--color-primary));
    border: 0;
    border-radius: var(--radius-sm);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: filter 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.button:hover {
    filter: brightness(1.06);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.button:active {
    filter: brightness(0.95);
    transform: translateY(0);
}

/* FAQ */
.faq__item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.1rem 1rem;
    margin-bottom: 0.6rem;
    box-shadow: var(--shadow-sm);
}

.faq__item summary {
    cursor: pointer;
    font-weight: 600;
    padding: 0.6rem 0;
}

.faq__item[open] summary {
    color: var(--color-primary);
}

.faq__item p {
    margin: 0 0 0.85rem;
    color: var(--color-muted);
}

/* Formularios amplios (comprar vs alquilar, ahorro inicial) */
.calc__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0 var(--space);
}

@media (min-width: 40rem) {
    .calc__grid {
        grid-template-columns: 1fr 1fr;
    }
}

.calc__grid .calc__field:last-child {
    grid-column: 1 / -1;
}

/* Radios (p. ej. estrategia de amortización) */
.calc__field--radios {
    margin-bottom: var(--space);
    padding: 0;
    border: 0;
}

.calc__field--radios legend {
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.calc__options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.calc__option {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

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

.calc__option:has(input:checked) {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
    box-shadow: inset 0 0 0 1px var(--color-primary);
}

.calc__option input {
    min-height: 0;
    width: auto;
}

.calc__option:has(input:checked) input {
    accent-color: var(--color-primary);
}

/* Cabecera de comparativa y punto de equilibrio */
.calc-result__heading {
    margin: 0;
    font-size: 1.15rem;
}

.calc-result__breakeven {
    display: inline-block;
    margin: 0.5rem 0 var(--space);
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    background: var(--color-primary-soft);
    color: var(--color-primary-dark);
    font-weight: 700;
    font-size: 0.95rem;
    font-variant-numeric: tabular-nums;
}

.calc-result__note {
    margin: var(--space) 0 0;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.calc__noscript {
    margin: var(--space) 0 0;
    color: var(--color-muted);
}

@media (min-width: 40rem) {
    .table--annual .amortization__table td:nth-child(n + 2),
    .table--annual .amortization__table th:nth-child(n + 2) {
        text-align: right;
    }
}

/* Lista de herramientas del home */
.tool-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space);
}

@media (min-width: 48rem) {
    .tool-list {
        grid-template-columns: 1fr 1fr;
    }
}

.tool-list li {
    padding: 1rem 1.15rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.tool-list li:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tool-list li:nth-child(3n + 2) {
    border-left-color: var(--color-accent);
}

.tool-list li:nth-child(3n + 3) {
    border-left-color: var(--color-teal);
}

.tool-list a {
    font-weight: 700;
    font-size: 1.05rem;
    text-decoration: none;
}

.tool-list a:hover {
    text-decoration: underline;
}

.tool-list p {
    margin: 0.3rem 0 0;
    color: var(--color-muted);
    font-size: 0.95rem;
}

/* ================= PUBLICIDAD (AdSense) ================= */

.adsense-zone {
    margin: 1.5rem 0;
}

.adsense {
    display: none;
    min-height: 120px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.adsense--visible {
    display: block;
}

.adsense--dummy {
    display: block;
    background:
        repeating-linear-gradient(
            45deg,
            var(--color-primary-soft),
            var(--color-primary-soft) 12px,
            transparent 12px,
            transparent 24px
        );
    border: 1px dashed var(--color-primary);
    opacity: 0.7;
}

/* ================= CONSENTIMIENTO DE COOKIES ================= */

.consent-banner {
    position: fixed;
    inset-inline: 0;
    bottom: 0;
    z-index: 1000;
    padding: 1rem;
    background: var(--color-surface);
    border-top: 2px solid var(--color-primary-soft);
    box-shadow: 0 -8px 30px -12px rgba(10, 25, 47, 0.35);
}

.consent-banner[hidden] {
    display: none;
}

.consent-banner__text {
    margin: 0 0 0.75rem;
    max-width: var(--max-width);
    margin-inline: auto;
    color: var(--color-text);
}

.consent-banner__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
}

.consent-banner .button {
    margin-top: 0;
}

.button--primary {
    background: linear-gradient(180deg, var(--color-accent), var(--color-accent-dark));
}

.consent-banner__more {
    color: var(--color-primary);
    text-underline-offset: 3px;
}

.consent-meta {
    margin: 1rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.consent-meta__btn {
    background: none;
    border: none;
    padding: 0;
    color: var(--color-primary);
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 3px;
    font-size: 0.85rem;
}

.consent-meta__btn[hidden],
.consent-meta__btn[hidden] + * {
    display: none;
}

.consent-meta__status[data-status="accepted"] {
    color: var(--color-success);
}

.consent-meta__status[data-status="rejected"] {
    color: var(--color-error);
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
    }
}