/* ==========================================================
   H360 DESIGN SYSTEM
   Calculadora de Calorías PRO
   Versión 1.0
   Compatible con Herramientas360 Template v3.0
   © 2026 José Carlos Núñez Florido
========================================================== */


/* ==========================================================
   1. FUENTE
========================================================== */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap");


/* ==========================================================
   2. VARIABLES
========================================================== */

:root {

    /* Colores principales */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-soft: #eff6ff;
    --color-secondary: #0f172a;
    --color-accent: #f97316;
    --color-accent-soft: #fff7ed;

    /* Estados */
    --color-success: #16a34a;
    --color-success-soft: #f0fdf4;
    --color-warning: #d97706;
    --color-warning-soft: #fffbeb;
    --color-danger: #dc2626;
    --color-danger-soft: #fef2f2;
    --color-info: #0284c7;
    --color-info-soft: #f0f9ff;

    /* Superficies */
    --color-background: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-soft: #f1f5f9;
    --color-surface-muted: #e2e8f0;

    /* Texto */
    --color-text: #0f172a;
    --color-text-soft: #475569;
    --color-text-muted: #64748b;
    --color-text-inverse: #ffffff;

    /* Bordes */
    --color-border: #dbe3ee;
    --color-border-strong: #cbd5e1;

    /* Sombras */
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.07);
    --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.10);
    --shadow-lg: 0 22px 55px rgba(15, 23, 42, 0.14);

    /* Radios */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-pill: 999px;

    /* Espaciado */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Anchuras */
    --container: 1180px;
    --container-narrow: 820px;

    /* Transiciones */
    --transition-fast: 160ms ease;
    --transition-normal: 240ms ease;
}


/* ==========================================================
   3. RESET Y BASE
========================================================== */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

body {
    margin: 0;
    min-width: 320px;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--color-background);
    color: var(--color-text);
    font-size: 16px;
    line-height: 1.65;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

img,
svg {
    display: block;
    max-width: 100%;
}

button,
input,
select,
textarea {
    font: inherit;
}

button,
select {
    cursor: pointer;
}

a {
    color: inherit;
    text-decoration: none;
}

p,
h1,
h2,
h3,
ul,
ol,
dl,
dd {
    margin-top: 0;
}

p:last-child {
    margin-bottom: 0;
}

ul,
ol {
    padding-left: 1.25rem;
}

fieldset {
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
}

table {
    width: 100%;
    border-collapse: collapse;
}

[hidden] {
    display: none !important;
}

::selection {
    background: rgba(37, 99, 235, 0.18);
}


/* ==========================================================
   4. ACCESIBILIDAD
========================================================== */

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 9999;
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    background: var(--color-secondary);
    color: var(--color-text-inverse);
    font-weight: 800;
    transform: translateY(-160%);
    transition: transform var(--transition-fast);
}

.skip-link:focus {
    transform: translateY(0);
}

:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.38);
    outline-offset: 3px;
}


/* ==========================================================
   5. CONTENEDORES
========================================================== */

.container {
    width: min(calc(100% - 32px), var(--container));
    margin-inline: auto;
}

.container--narrow {
    width: min(calc(100% - 32px), var(--container-narrow));
}

.section {
    padding-block: var(--space-20);
}

.section--soft {
    background: var(--color-surface-soft);
}

.section--compact {
    padding-block: var(--space-8);
}

.section-heading {
    max-width: 760px;
    margin: 0 auto var(--space-10);
    text-align: center;
}

.section-heading h2 {
    margin-bottom: var(--space-4);
    font-size: clamp(1.85rem, 4vw, 2.65rem);
    line-height: 1.15;
    letter-spacing: -0.04em;
}

.section-heading p {
    color: var(--color-text-soft);
    font-size: 1.05rem;
}

.eyebrow {
    margin-bottom: var(--space-3);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}


/* ==========================================================
   6. CABECERA
========================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(203, 213, 225, 0.8);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 74px;
    gap: var(--space-6);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    border-radius: var(--radius-sm);
}

.brand__icon {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--color-primary), #60a5fa);
    box-shadow: var(--shadow-sm);
    font-size: 1.35rem;
}

.brand__text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand__text strong {
    font-size: 1rem;
    font-weight: 900;
}

.brand__text small {
    margin-top: 3px;
    color: var(--color-text-muted);
    font-size: 0.74rem;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.main-nav a {
    padding: 10px 14px;
    border-radius: var(--radius-pill);
    color: var(--color-text-soft);
    font-size: 0.92rem;
    font-weight: 700;
    transition:
        background var(--transition-fast),
        color var(--transition-fast);
}

.main-nav a:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary-dark);
}


/* ==========================================================
   7. MIGAS DE PAN
========================================================== */

.breadcrumb-wrapper {
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.breadcrumb {
    padding-block: 14px;
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
    color: var(--color-text-muted);
    font-size: 0.86rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb li:not(:last-child)::after {
    content: "/";
    color: var(--color-border-strong);
}

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


/* ==========================================================
   8. HERO
========================================================== */

.hero {
    overflow: hidden;
    background:
        radial-gradient(circle at 85% 15%, rgba(96, 165, 250, 0.28), transparent 28%),
        radial-gradient(circle at 12% 75%, rgba(249, 115, 22, 0.13), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
    align-items: center;
    gap: clamp(2rem, 6vw, 5rem);
    min-height: 570px;
    padding-block: var(--space-16);
}

.hero h1 {
    max-width: 820px;
    margin-bottom: var(--space-5);
    font-size: clamp(2.5rem, 7vw, 4.8rem);
    line-height: 0.98;
    letter-spacing: -0.065em;
}

.hero__lead {
    max-width: 760px;
    margin-bottom: var(--space-6);
    color: var(--color-text-soft);
    font-size: clamp(1rem, 2.3vw, 1.22rem);
}

.hero__benefits {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin: 0 0 var(--space-8);
    padding: 0;
    list-style: none;
}

.hero__benefits li {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 13px;
    border: 1px solid #dbeafe;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.8);
    color: var(--color-text-soft);
    font-size: 0.88rem;
    font-weight: 700;
}

.hero__benefits li::before {
    content: "✓";
    color: var(--color-success);
    font-weight: 900;
}

.hero__visual {
    display: flex;
    justify-content: center;
}

.hero-card {
    position: relative;
    width: min(100%, 340px);
    padding: 42px 30px;
    overflow: hidden;
    border: 1px solid rgba(219, 227, 238, 0.9);
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.88);
    box-shadow: var(--shadow-lg);
    text-align: center;
    backdrop-filter: blur(16px);
}

.hero-card::before {
    position: absolute;
    inset: -70px auto auto -70px;
    width: 170px;
    height: 170px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.10);
    content: "";
}

.hero-card::after {
    position: absolute;
    right: -50px;
    bottom: -65px;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: rgba(249, 115, 22, 0.11);
    content: "";
}

.hero-card__icon {
    position: relative;
    z-index: 1;
    display: grid;
    width: 76px;
    height: 76px;
    margin: 0 auto var(--space-5);
    place-items: center;
    border-radius: 22px;
    background: var(--color-accent-soft);
    font-size: 2.35rem;
}

.hero-card__label,
.hero-card__caption,
.hero-card__value {
    position: relative;
    z-index: 1;
}

.hero-card__label {
    margin-bottom: var(--space-2);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 700;
}

.hero-card__value {
    display: block;
    margin-bottom: var(--space-1);
    color: var(--color-secondary);
    font-size: clamp(2.2rem, 5vw, 3.25rem);
    line-height: 1;
    letter-spacing: -0.05em;
}

.hero-card__caption {
    color: var(--color-text-soft);
}


/* ==========================================================
   9. BOTONES
========================================================== */

.button {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px 22px;
    border: 1px solid transparent;
    border-radius: 14px;
    font-weight: 800;
    line-height: 1;
    transition:
        transform var(--transition-fast),
        background var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.button:hover {
    transform: translateY(-2px);
}

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

.button--primary {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    box-shadow: 0 10px 22px rgba(37, 99, 235, 0.22);
    color: var(--color-text-inverse);
}

.button--primary:hover {
    box-shadow: 0 14px 28px rgba(37, 99, 235, 0.30);
}

.button--secondary {
    border-color: var(--color-border-strong);
    background: var(--color-surface);
    color: var(--color-secondary);
}

.button--secondary:hover {
    border-color: #94a3b8;
    background: #f8fafc;
}


/* ==========================================================
   10. NAVEGACIÓN INTERNA
========================================================== */

.section-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-2);
}

.section-nav a {
    padding: 9px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    background: var(--color-surface);
    color: var(--color-text-soft);
    font-size: 0.88rem;
    font-weight: 700;
    transition:
        border-color var(--transition-fast),
        color var(--transition-fast),
        background var(--transition-fast);
}

.section-nav a:hover {
    border-color: #bfdbfe;
    background: var(--color-primary-soft);
    color: var(--color-primary-dark);
}


/* ==========================================================
   11. TARJETA CALCULADORA
========================================================== */

.calculator-card {
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
}

.calculator-form {
    padding: clamp(24px, 5vw, 46px);
}

.form-group,
.form-field {
    margin-bottom: var(--space-8);
}

.form-group legend,
.form-field > label {
    display: block;
    margin-bottom: var(--space-3);
    color: var(--color-secondary);
    font-weight: 800;
}

.form-grid {
    display: grid;
    gap: var(--space-5);
}

.form-grid--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.option-grid {
    display: grid;
    gap: var(--space-4);
}

.option-grid--two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.option-grid--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.option-card {
    position: relative;
    display: block;
    cursor: pointer;
}

.option-card input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.option-card__content {
    display: flex;
    min-height: 112px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 18px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    text-align: center;
    transition:
        border-color var(--transition-fast),
        background var(--transition-fast),
        transform var(--transition-fast),
        box-shadow var(--transition-fast);
}

.option-card:hover .option-card__content {
    transform: translateY(-2px);
    border-color: #bfdbfe;
    box-shadow: var(--shadow-sm);
}

.option-card input:checked + .option-card__content {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.10);
}

.option-card input:focus-visible + .option-card__content {
    outline: 3px solid rgba(37, 99, 235, 0.38);
    outline-offset: 3px;
}

.option-card__icon {
    font-size: 1.8rem;
}

.option-card__content strong {
    color: var(--color-secondary);
}

.option-card__content small {
    color: var(--color-text-muted);
    font-size: 0.78rem;
}

.input-with-unit {
    display: flex;
    overflow: hidden;
    border: 1px solid var(--color-border-strong);
    border-radius: 13px;
    background: var(--color-surface);
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.input-with-unit:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.10);
}

.input-with-unit input {
    min-width: 0;
    flex: 1;
    padding: 14px 15px;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--color-text);
}

.input-with-unit span {
    display: flex;
    align-items: center;
    padding: 0 14px;
    border-left: 1px solid var(--color-border);
    background: var(--color-surface-soft);
    color: var(--color-text-muted);
    font-size: 0.88rem;
    font-weight: 800;
}

select {
    width: 100%;
    min-height: 52px;
    padding: 13px 44px 13px 15px;
    border: 1px solid var(--color-border-strong);
    border-radius: 13px;
    outline: 0;
    background-color: var(--color-surface);
    color: var(--color-text);
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.10);
}

input::placeholder {
    color: #94a3b8;
}

.field-help {
    display: block;
    margin-top: 7px;
    color: var(--color-text-muted);
    font-size: 0.78rem;
}

.field-error {
    min-height: 1.2em;
    margin: 7px 0 0;
    color: var(--color-danger);
    font-size: 0.8rem;
    font-weight: 700;
}

.form-field.is-invalid .input-with-unit,
.form-field.is-invalid select {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.08);
}

.form-message {
    margin-bottom: var(--space-5);
    padding: 14px 16px;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    background: var(--color-danger-soft);
    color: #991b1b;
    font-weight: 700;
}

.form-actions {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-3);
}

.privacy-note {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: 17px clamp(24px, 5vw, 46px);
    border-top: 1px solid var(--color-border);
    background: var(--color-surface-soft);
    color: var(--color-text-soft);
    font-size: 0.86rem;
}

.privacy-note span {
    flex: 0 0 auto;
}


/* ==========================================================
   12. RESULTADOS
========================================================== */

.result-main {
    max-width: 830px;
    margin: 0 auto var(--space-8);
    padding: clamp(26px, 5vw, 48px);
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-xl);
    background:
        radial-gradient(circle at top right, rgba(96, 165, 250, 0.18), transparent 35%),
        var(--color-surface);
    box-shadow: var(--shadow-md);
}

.result-main__header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.result-main__icon {
    display: grid;
    width: 62px;
    height: 62px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 18px;
    background: var(--color-accent-soft);
    font-size: 1.8rem;
}

.result-main__label {
    margin-bottom: 2px;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
}

.result-main h3 {
    margin-bottom: 0;
    font-size: 1.35rem;
}

.result-main__value {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px;
    margin-bottom: var(--space-5);
}

.result-main__value strong {
    color: var(--color-primary-dark);
    font-size: clamp(3.2rem, 10vw, 5.6rem);
    line-height: 0.95;
    letter-spacing: -0.07em;
}

.result-main__value span {
    color: var(--color-text-soft);
    font-size: 1.2rem;
    font-weight: 800;
}

.result-main__description {
    margin-bottom: var(--space-6);
    color: var(--color-text-soft);
    font-size: 1.02rem;
}

.confidence {
    padding: var(--space-5);
    border: 1px solid #dbeafe;
    border-radius: var(--radius-md);
    background: rgba(239, 246, 255, 0.7);
}

.confidence__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.confidence__header span {
    color: var(--color-primary-dark);
    font-weight: 900;
}

.confidence__bar {
    height: 10px;
    overflow: hidden;
    border-radius: var(--radius-pill);
    background: #dbeafe;
}

.confidence__bar span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--color-primary), #60a5fa);
}

.confidence p {
    margin: var(--space-3) 0 0;
    color: var(--color-text-muted);
    font-size: 0.82rem;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-8);
}

.result-card {
    padding: var(--space-6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.result-card__icon {
    display: grid;
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-4);
    place-items: center;
    border-radius: 14px;
    background: var(--color-surface-soft);
    font-size: 1.35rem;
}

.result-card h3 {
    margin-bottom: var(--space-4);
}

.result-card__value {
    margin-bottom: var(--space-3);
}

.result-card__value strong {
    display: block;
    color: var(--color-secondary);
    font-size: 2rem;
    line-height: 1;
    letter-spacing: -0.04em;
}

.result-card__value span,
.result-card > p:last-child {
    color: var(--color-text-muted);
    font-size: 0.86rem;
}

.details-card,
.recommendation-card {
    margin-bottom: var(--space-8);
    padding: clamp(24px, 5vw, 38px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.details-card__header {
    margin-bottom: var(--space-5);
}

.details-card h3,
.recommendation-card h3 {
    margin-bottom: 0;
    font-size: 1.35rem;
}

.details-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
    margin: 0;
}

.details-list > div {
    display: flex;
    justify-content: space-between;
    gap: var(--space-4);
    padding: 15px 16px;
    border-radius: var(--radius-sm);
    background: var(--color-surface-soft);
}

.details-list dt {
    color: var(--color-text-soft);
}

.details-list dd {
    margin: 0;
    color: var(--color-secondary);
    text-align: right;
    font-weight: 800;
}

.recommendation-card {
    border-color: #bbf7d0;
    background:
        radial-gradient(circle at top right, rgba(34, 197, 94, 0.10), transparent 32%),
        var(--color-surface);
}

.recommendation-card__header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.recommendation-card__header > span {
    display: grid;
    width: 54px;
    height: 54px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 16px;
    background: var(--color-success-soft);
    font-size: 1.45rem;
}

.recommendation-card ul {
    margin-bottom: 0;
}

.recommendation-card li + li {
    margin-top: 8px;
}

.result-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3);
}


/* ==========================================================
   13. TARJETAS DE CONTENIDO
========================================================== */

.content-grid,
.related-grid {
    display: grid;
    gap: var(--space-5);
}

.content-grid--two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.content-grid--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card,
.tip-card {
    padding: var(--space-6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-xs);
}

.info-card__icon,
.tip-card__icon {
    display: grid;
    width: 50px;
    height: 50px;
    margin-bottom: var(--space-4);
    place-items: center;
    border-radius: 15px;
    background: var(--color-primary-soft);
    font-size: 1.35rem;
}

.info-card h3,
.tip-card h3 {
    margin-bottom: var(--space-3);
}

.info-card p,
.tip-card p {
    color: var(--color-text-soft);
}


/* ==========================================================
   14. PASOS
========================================================== */

.steps {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-5);
    margin: 0;
    padding: 0;
    list-style: none;
}

.step-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-xs);
}

.step-card__number {
    display: grid;
    width: 46px;
    height: 46px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 14px;
    background: var(--color-primary);
    color: var(--color-text-inverse);
    font-weight: 900;
}

.step-card h3 {
    margin-bottom: var(--space-2);
}

.step-card p {
    color: var(--color-text-soft);
}


/* ==========================================================
   15. FÓRMULA Y TABLA
========================================================== */

.formula-card {
    margin-bottom: var(--space-8);
    padding: clamp(24px, 5vw, 38px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.formula-card article + article {
    margin-top: var(--space-5);
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-border);
}

.formula-card h3 {
    margin-bottom: var(--space-2);
}

.formula {
    margin: 0;
    padding: 16px;
    overflow-x: auto;
    border-radius: var(--radius-sm);
    background: var(--color-secondary);
    color: var(--color-text-inverse);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.93rem;
}

.formula-card__note {
    margin-top: var(--space-5);
    color: var(--color-text-muted);
    font-size: 0.86rem;
}

.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

caption {
    padding: 18px 20px;
    color: var(--color-secondary);
    text-align: left;
    font-weight: 900;
}

th,
td {
    padding: 15px 18px;
    border-top: 1px solid var(--color-border);
    text-align: left;
}

thead th {
    background: var(--color-surface-soft);
    color: var(--color-secondary);
    font-size: 0.86rem;
}

tbody th {
    color: var(--color-secondary);
}

tbody td {
    color: var(--color-text-soft);
}


/* ==========================================================
   16. FAQ
========================================================== */

.faq-list {
    display: grid;
    gap: var(--space-3);
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-xs);
}

.faq-item summary {
    position: relative;
    padding: 19px 54px 19px 20px;
    list-style: none;
    color: var(--color-secondary);
    font-weight: 800;
    cursor: pointer;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    position: absolute;
    top: 50%;
    right: 20px;
    display: grid;
    width: 28px;
    height: 28px;
    place-items: center;
    border-radius: 50%;
    background: var(--color-primary-soft);
    color: var(--color-primary);
    content: "+";
    font-size: 1.2rem;
    transform: translateY(-50%);
    transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
    content: "−";
}

.faq-item__content {
    padding: 0 20px 20px;
    color: var(--color-text-soft);
}


/* ==========================================================
   17. RELACIONADAS
========================================================== */

.related-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.related-card {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-xs);
    transition:
        transform var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.related-card:hover {
    transform: translateY(-3px);
    border-color: #bfdbfe;
    box-shadow: var(--shadow-sm);
}

.related-card__icon {
    display: grid;
    width: 50px;
    height: 50px;
    place-items: center;
    border-radius: 15px;
    background: var(--color-primary-soft);
    font-size: 1.35rem;
}

.related-card h3 {
    margin-bottom: 4px;
    font-size: 1rem;
}

.related-card p {
    color: var(--color-text-muted);
    font-size: 0.82rem;
}

.related-card__arrow {
    color: var(--color-primary);
    font-size: 1.3rem;
    font-weight: 900;
}

.section-cta {
    margin-top: var(--space-8);
    text-align: center;
}


/* ==========================================================
   18. AVISO
========================================================== */

.notice {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-6);
    border: 1px solid #bae6fd;
    border-radius: var(--radius-lg);
    background: var(--color-info-soft);
}

.notice__icon {
    display: grid;
    width: 48px;
    height: 48px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 14px;
    background: #e0f2fe;
    font-size: 1.3rem;
}

.notice h2 {
    margin-bottom: var(--space-2);
    font-size: 1.2rem;
}

.notice p {
    color: #0c4a6e;
    font-size: 0.9rem;
}


/* ==========================================================
   19. FOOTER
========================================================== */

.site-footer {
    padding-top: var(--space-16);
    background: var(--color-secondary);
    color: var(--color-text-inverse);
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 0.8fr;
    gap: var(--space-10);
    padding-bottom: var(--space-12);
}

.brand--footer .brand__text small {
    color: #94a3b8;
}

.site-footer__description {
    max-width: 440px;
    margin-top: var(--space-5);
    color: #cbd5e1;
    font-size: 0.9rem;
}

.site-footer h2 {
    margin-bottom: var(--space-4);
    font-size: 0.95rem;
}

.site-footer ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-footer li + li {
    margin-top: 10px;
}

.site-footer nav a {
    color: #cbd5e1;
    font-size: 0.9rem;
}

.site-footer nav a:hover {
    color: #ffffff;
}

.site-footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding-block: 20px;
    border-top: 1px solid rgba(148, 163, 184, 0.22);
    color: #94a3b8;
    font-size: 0.82rem;
}

.site-footer__bottom a:hover {
    color: #ffffff;
}


/* ==========================================================
   20. UTILIDADES Y ESTADOS
========================================================== */

.is-loading {
    pointer-events: none;
    opacity: 0.72;
}

.is-success {
    border-color: var(--color-success) !important;
}

.text-center {
    text-align: center;
}


/* ==========================================================
   21. RESPONSIVE
========================================================== */

@media (max-width: 1024px) {

    .hero__inner {
        grid-template-columns: 1fr;
        min-height: auto;
        text-align: center;
    }

    .hero__content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero__benefits {
        justify-content: center;
    }

    .hero__visual {
        width: 100%;
    }

    .content-grid--three,
    .related-grid,
    .result-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .site-footer__grid {
        grid-template-columns: 1.2fr 0.8fr 0.8fr;
    }
}


@media (max-width: 820px) {

    .section {
        padding-block: var(--space-16);
    }

    .main-nav {
        display: none;
    }

    .form-grid--three,
    .option-grid--three,
    .content-grid--three,
    .related-grid,
    .result-grid,
    .steps,
    .details-list {
        grid-template-columns: 1fr;
    }

    .content-grid--two {
        grid-template-columns: 1fr;
    }

    .site-footer__grid {
        grid-template-columns: 1fr 1fr;
    }

    .site-footer__grid > div:first-child {
        grid-column: 1 / -1;
    }
}


@media (max-width: 600px) {

    .container,
    .container--narrow {
        width: min(calc(100% - 22px), var(--container));
    }

    .site-header__inner {
        min-height: 66px;
    }

    .brand__icon {
        width: 40px;
        height: 40px;
    }

    .hero__inner {
        padding-block: var(--space-12);
    }

    .hero h1 {
        font-size: clamp(2.25rem, 13vw, 3.5rem);
    }

    .hero__benefits {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }

    .hero__benefits li {
        justify-content: center;
    }

    .hero .button {
        width: 100%;
    }

    .hero-card {
        padding: 34px 22px;
    }

    .section-nav {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 4px;
        scrollbar-width: thin;
    }

    .section-nav a {
        flex: 0 0 auto;
    }

    .calculator-form {
        padding: 22px 16px;
    }

    .option-grid--two {
        grid-template-columns: 1fr;
    }

    .option-card__content {
        min-height: 96px;
    }

    .form-actions {
        grid-template-columns: 1fr;
    }

    .privacy-note {
        padding: 16px;
    }

    .result-main {
        padding: 24px 18px;
    }

    .result-main__header {
        align-items: flex-start;
    }

    .result-main__value strong {
        font-size: clamp(3rem, 18vw, 4.6rem);
    }

    .confidence__header {
        align-items: flex-start;
        flex-direction: column;
        gap: 4px;
    }

    .details-card,
    .recommendation-card {
        padding: 22px 18px;
    }

    .details-list > div {
        flex-direction: column;
        gap: 4px;
    }

    .details-list dd {
        text-align: left;
    }

    .result-actions {
        flex-direction: column;
    }

    .result-actions .button {
        width: 100%;
    }

    .related-card {
        grid-template-columns: auto 1fr;
    }

    .related-card__arrow {
        display: none;
    }

    .notice {
        flex-direction: column;
    }

    .site-footer__grid {
        grid-template-columns: 1fr;
    }

    .site-footer__grid > div:first-child {
        grid-column: auto;
    }

    .site-footer__bottom {
        align-items: flex-start;
        flex-direction: column;
    }

    th,
    td {
        padding: 13px 14px;
        white-space: nowrap;
    }
}


/* ==========================================================
   22. PREFERENCIAS DEL SISTEMA
========================================================== */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}


@media print {

    .site-header,
    .breadcrumb-wrapper,
    .hero,
    .section-nav,
    .calculator-card,
    .result-actions,
    .related-grid,
    .section-cta,
    .site-footer {
        display: none !important;
    }

    body {
        background: #ffffff;
    }

    #resultados {
        display: block !important;
        padding: 0;
        background: #ffffff;
    }

    .result-main,
    .result-card,
    .details-card,
    .recommendation-card {
        box-shadow: none;
        break-inside: avoid;
    }
}