/* ==========================================================================
   Cellstory España — Hoja de estilos principal
   ========================================================================== */

:root {
	--color-black: #131211;
	--color-ink: #1c1b1a;
	--color-white: #ffffff;
	--color-cream: #f7f5f2;
	--color-grey: #6f6b66;
	--color-grey-light: #d9d5cf;
	--color-border: #e6e2db;
	--color-teal: #1f8f88;
	--color-teal-dark: #14655f;
	--color-teal-light: #e4f2f0;

	--font-heading: 'Jost', 'Poppins', sans-serif;
	--font-body: 'Poppins', 'Jost', sans-serif;

	--container-width: 1180px;
	--container-narrow: 780px;
	--radius: 2px;
	--transition: 0.25s ease;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
	margin: 0;
	font-family: var(--font-body);
	color: var(--color-ink);
	background: var(--color-white);
	font-size: 16px;
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4 {
	font-family: var(--font-heading);
	font-weight: 500;
	letter-spacing: 0.01em;
	margin: 0 0 0.6em;
	color: var(--color-black);
}
h1 { font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.1; }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); line-height: 1.2; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
.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;
}
.skip-link {
	position: absolute; left: -999px; top: 0; background: var(--color-black); color: #fff;
	padding: 12px 18px; z-index: 999;
}
.skip-link:focus { left: 0; }

/* --- Botones --- */
.btn {
	display: inline-flex; align-items: center; justify-content: center;
	padding: 14px 30px; border-radius: var(--radius);
	font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase;
	font-weight: 500; transition: background var(--transition), color var(--transition), border-color var(--transition);
	border: 1px solid transparent; white-space: nowrap;
}
.btn--primary { background: var(--color-black); color: #fff; }
.btn--primary:hover { background: var(--color-teal-dark); }
.btn--outline { border-color: var(--color-black); color: var(--color-black); }
.btn--outline:hover { background: var(--color-black); color: #fff; }
.btn--ghost { border-color: rgba(0,0,0,0.3); color: var(--color-black); }
.btn--ghost.btn--light { border-color: rgba(255,255,255,0.7); color: #fff; }
.btn--ghost.btn--light:hover { background: #fff; color: var(--color-black); }
.btn--small { padding: 9px 18px; font-size: 0.75rem; }
.link-arrow {
	display: inline-block; margin-top: 8px; font-weight: 500; font-size: 0.9rem;
	border-bottom: 1px solid currentColor; padding-bottom: 2px; transition: opacity var(--transition);
}
.link-arrow:hover { opacity: 0.65; }

/* --- Announcement bar --- */
.announcement-bar {
	background: var(--color-black); color: #fff;
	font-size: 0.75rem; letter-spacing: 0.12em; padding: 9px 16px;
	display: flex; align-items: center; justify-content: center; gap: 14px;
}
.announcement-bar__arrow {
	flex: 0 0 auto; display: flex; align-items: center; justify-content: center;
	width: 22px; height: 22px; padding: 0; background: none; border: none;
	color: rgba(255,255,255,0.7); transition: color var(--transition);
}
.announcement-bar__arrow:hover { color: #fff; }
.announcement-bar__track {
	display: grid; align-items: center; justify-items: center;
	flex: 0 1 auto; max-width: 90vw; overflow: hidden;
}
.announcement-bar__slide {
	grid-area: 1 / 1; margin: 0; text-align: center; white-space: nowrap;
	opacity: 0; transform: translateY(8px); transition: opacity 0.45s ease, transform 0.45s ease;
	pointer-events: none;
}
.announcement-bar__slide.is-active { opacity: 1; transform: translateY(0); pointer-events: auto; }
.announcement-bar__slide.is-leaving { transform: translateY(-8px); }

/* --- Header / navegación --- */
.site-header {
	position: sticky; top: 0; z-index: 100; background: #fff;
	border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
	max-width: var(--container-width); margin: 0 auto; padding: 10px 24px;
	display: flex; align-items: center; justify-content: space-between; gap: 32px;
}
.site-logo img { width: 76px; height: 76px; object-fit: contain; }

.nav-toggle {
	display: none; flex-direction: column; justify-content: center; gap: 5px;
	width: 40px; height: 40px; background: none; border: none; padding: 0;
}
.nav-toggle span { display: block; width: 100%; height: 2px; background: var(--color-black); transition: transform var(--transition), opacity var(--transition); }

.site-nav { display: flex; align-items: center; flex: 1 1 auto; gap: 28px; }
.site-nav ul { display: flex; align-items: center; justify-content: center; gap: 36px; flex: 1 1 auto; }
.site-nav a {
	font-size: 0.9rem; letter-spacing: 0.06em; text-transform: uppercase;
	font-weight: 500; color: var(--color-ink); padding: 6px 0; position: relative;
}
.site-nav a::after {
	content: ''; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px;
	background: var(--color-teal); transition: right var(--transition);
}
.site-nav a:hover::after, .site-nav a.is-active::after { right: 0; }
.site-nav a.is-active { color: var(--color-teal-dark); }
.site-nav__miracletox { color: var(--color-grey); }

.lang-switch { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; letter-spacing: 0.05em; }
.lang-switch a { color: var(--color-grey); font-weight: 500; }
.lang-switch a.is-active { color: var(--color-black); text-decoration: underline; }

/* --- Hero (home) --- */
.hero { position: relative; min-height: 78vh; display: flex; align-items: flex-end; overflow: hidden; }
.hero__image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero__overlay {
	position: absolute; inset: 0;
	background: linear-gradient(0deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.05) 55%);
}
.hero__content {
	position: relative; z-index: 1; color: #fff; max-width: var(--container-width);
	margin: 0 auto; padding: 60px 24px 70px; width: 100%;
}
.hero__content h1 { color: #fff; max-width: 640px; }
.hero__content p { max-width: 520px; font-size: 1.05rem; opacity: 0.92; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 20px; }

/* --- Page hero (páginas interiores) --- */
.page-hero {
	background: var(--color-cream); padding: 90px 24px 60px; text-align: center;
	border-bottom: 1px solid var(--color-border);
}
.page-hero--small { padding: 60px 24px 40px; }
.page-hero__content { max-width: var(--container-narrow); margin: 0 auto; }
.page-hero__content p { color: var(--color-grey); font-size: 1.05rem; }

/* --- Secciones genéricas --- */
.section { max-width: var(--container-width); margin: 0 auto; padding: 70px 24px; }
.section--narrow { max-width: var(--container-narrow); }
.section--center { text-align: center; }
.section--alt { background: var(--color-cream); max-width: none; padding-left: 24px; padding-right: 24px; }
.section--alt > * { max-width: var(--container-narrow); margin-left: auto; margin-right: auto; }

.eyebrow {
	text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.78rem;
	color: var(--color-teal-dark); font-weight: 600; margin-bottom: 10px;
}
.lead { font-size: 1.1rem; color: var(--color-grey); }
.text-block { margin-bottom: 40px; }
.text-block:last-child { margin-bottom: 0; }

/* --- Split cards (Tratamiento / Ciencia en Home, Cómo funciona) --- */
.section--split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.split-card { display: flex; flex-direction: column; }
.split-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius); }
.split-card__body { padding-top: 22px; }
.split-card--reverse { flex-direction: column; }

/* --- Press logos --- */
.press-logos {
	display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
	gap: 40px; margin-top: 10px;
}
.press-logos img { height: 34px; width: auto; object-fit: contain; filter: grayscale(1); opacity: 0.75; }
.press-logos__text {
	font-family: var(--font-heading); font-size: 1.1rem; letter-spacing: 0.04em;
	color: var(--color-grey); opacity: 0.8;
}

/* --- Tecnología / bloque con imagen lateral --- */
.section--technology {
	display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 50px; align-items: center;
	background: var(--color-teal-light); max-width: none; padding: 70px 24px;
}
.section--technology > * { max-width: 560px; }
.technology__media { max-width: 420px; margin: 0 auto; }
.technology__media img { border-radius: var(--radius); }
.technology__body { max-width: 520px; }

/* --- Testimonio --- */
.section--testimonial { text-align: center; max-width: var(--container-narrow); }
.section--testimonial blockquote { margin: 0; }
.section--testimonial p {
	font-family: var(--font-heading); font-size: clamp(1.3rem, 2.4vw, 1.8rem);
	color: var(--color-black); line-height: 1.45;
}
.section--testimonial cite {
	display: block; margin-top: 18px; font-style: normal; color: var(--color-teal-dark);
	font-weight: 600; letter-spacing: 0.05em;
}

/* --- Banner con imagen de fondo --- */
.section--banner {
	position: relative; max-width: none; padding: 110px 24px; background-size: cover;
	background-position: center; text-align: center; color: #fff;
}
.section--banner__overlay { position: absolute; inset: 0; background: rgba(10,10,10,0.55); }
.section--banner__content { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.section--banner__content h2 { color: #fff; }
.section--banner__content p { opacity: 0.92; }

/* --- Split CTA + preview de galería --- */
.section--split-cta {
	display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center;
}
.gallery-preview { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.gallery-preview img { aspect-ratio: 1/1; object-fit: cover; border-radius: var(--radius); }

/* --- Pasos del tratamiento --- */
.section--steps { max-width: var(--container-narrow); padding-top: 0; }
.steps-list { display: flex; flex-direction: column; gap: 36px; }
.steps-list__item { display: grid; grid-template-columns: 70px 1fr; gap: 20px; align-items: flex-start; }
.steps-list__number {
	font-family: var(--font-heading); font-size: 2.1rem; color: var(--color-teal);
	line-height: 1; font-weight: 500;
}
.steps-list__item h3 { margin-bottom: 8px; }
.steps-list__item p { color: var(--color-grey); margin: 0; }

/* --- CTA final de página --- */
.section--cta {
	text-align: center; background: var(--color-black); color: #fff; max-width: none;
	padding: 80px 24px;
}
.section--cta h2 { color: #fff; }
.section--cta p { color: rgba(255,255,255,0.75); max-width: 520px; margin-left: auto; margin-right: auto; }
.section--cta .btn--primary { background: var(--color-teal); }
.section--cta .btn--primary:hover { background: var(--color-teal-dark); }

/* --- Galería de resultados --- */
.results-grid {
	display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
}
.results-grid__item {
	background: none; border: none; padding: 0; display: block; border-radius: var(--radius);
	overflow: hidden; aspect-ratio: 1/1;
}
.results-grid__item img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition); }
.results-grid__item:hover img { transform: scale(1.05); }
.results-note { margin-top: 24px; text-align: center; color: var(--color-grey); font-size: 0.9rem; }

.lightbox {
	position: fixed; inset: 0; background: rgba(10,10,10,0.92); z-index: 999;
	display: flex; align-items: center; justify-content: center; padding: 40px;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 90vw; max-height: 85vh; object-fit: contain; border-radius: var(--radius); }
.lightbox__close {
	position: absolute; top: 20px; right: 24px; background: none; border: none;
	color: #fff; font-size: 2.2rem; line-height: 1; padding: 6px 12px;
}

/* --- Acordeón FAQ --- */
.accordion { display: flex; flex-direction: column; gap: 10px; }
.accordion__item { border: 1px solid var(--color-border); border-radius: var(--radius); padding: 4px 22px; }
.accordion__question {
	display: flex; align-items: center; justify-content: space-between; gap: 16px;
	padding: 18px 0; font-family: var(--font-heading); font-size: 1.05rem;
	cursor: pointer; list-style: none;
}
.accordion__question::-webkit-details-marker { display: none; }
.accordion__icon { position: relative; width: 16px; height: 16px; flex-shrink: 0; }
.accordion__icon::before, .accordion__icon::after {
	content: ''; position: absolute; background: var(--color-black); top: 50%; left: 50%;
	transform: translate(-50%, -50%);
}
.accordion__icon::before { width: 16px; height: 2px; }
.accordion__icon::after { width: 2px; height: 16px; transition: opacity var(--transition); }
details[open] .accordion__icon::after { opacity: 0; }
.accordion__answer { padding: 0 0 20px; color: var(--color-grey); }
.accordion__answer p:last-child { margin-bottom: 0; }

/* --- Formulario de contacto --- */
.section--contact { padding-top: 50px; }
.contact-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 60px; }
.form-row { margin-bottom: 20px; display: flex; flex-direction: column; gap: 6px; }
.form-row label { font-size: 0.85rem; font-weight: 500; }
.form-row input[type="text"],
.form-row input[type="email"],
.form-row input[type="tel"],
.form-row textarea {
	padding: 13px 16px; border: 1px solid var(--color-grey-light); border-radius: var(--radius);
	font-family: inherit; font-size: 0.95rem; background: #fff; color: var(--color-ink);
}
.form-row input:focus, .form-row textarea:focus {
	outline: none; border-color: var(--color-teal);
}
.form-row textarea { resize: vertical; min-height: 130px; }
.form-row--checkbox label { flex-direction: row; align-items: flex-start; gap: 10px; font-weight: 400; font-size: 0.88rem; color: var(--color-grey); }
.form-row--checkbox input { margin-top: 3px; }
.form-error { color: #b3261e; font-size: 0.8rem; min-height: 1em; }
.hp-field { position: absolute; left: -9999px; top: -9999px; }

.form-feedback {
	padding: 14px 18px; border-radius: var(--radius); margin-bottom: 24px; font-size: 0.92rem;
}
.form-feedback--success { background: #e5f3e0; color: #2c5c1e; border: 1px solid #b8dcae; }
.form-feedback--error { background: #fbe7e5; color: #8a241b; border: 1px solid #f1b9b3; }

.contact-info h2 { font-size: 1.3rem; }
.contact-info__label {
	text-transform: uppercase; font-size: 0.72rem; letter-spacing: 0.1em;
	color: var(--color-grey); margin: 22px 0 4px;
}
.contact-info__label:first-of-type { margin-top: 0; }
.contact-info a { color: var(--color-teal-dark); font-weight: 500; }
.contact-info a:hover { text-decoration: underline; }

/* --- Contenido legal --- */
.legal-content h2 { margin-top: 2em; font-size: 1.25rem; }
.legal-content ul { list-style: disc; padding-left: 22px; margin-bottom: 1em; }
.legal-content ul li { margin-bottom: 6px; }
.legal-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 0.88rem; }
.legal-table th, .legal-table td { border: 1px solid var(--color-border); padding: 10px 12px; text-align: left; }
.legal-table th { background: var(--color-cream); }

/* --- Footer --- */
.site-footer { background: var(--color-black); color: rgba(255,255,255,0.85); padding-top: 60px; }
.site-footer__inner {
	max-width: var(--container-width); margin: 0 auto; padding: 0 24px 40px;
	display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
}
.site-footer__brand img { width: 44px; height: 44px; margin-bottom: 14px; }
.site-footer__brand p { color: rgba(255,255,255,0.6); font-size: 0.88rem; max-width: 240px; }
.site-footer h3 {
	color: #fff; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em;
	margin-bottom: 16px;
}
.site-footer ul { display: flex; flex-direction: column; gap: 10px; }
.site-footer a { font-size: 0.9rem; color: rgba(255,255,255,0.75); }
.site-footer a:hover { color: var(--color-teal); }
.site-footer__bottom {
	border-top: 1px solid rgba(255,255,255,0.12); padding: 20px 24px; text-align: center;
	font-size: 0.8rem; color: rgba(255,255,255,0.5);
}

/* --- Banner de cookies --- */
.cookie-banner {
	position: fixed; left: 20px; right: 20px; bottom: 20px; z-index: 998;
	background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius);
	box-shadow: 0 10px 30px rgba(0,0,0,0.15); padding: 18px 22px;
	display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
	max-width: 640px; margin: 0 auto;
}
.cookie-banner p { margin: 0; font-size: 0.85rem; color: var(--color-grey); flex: 1 1 260px; }
.cookie-banner a { color: var(--color-teal-dark); text-decoration: underline; }
.cookie-banner[hidden] { display: none; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
	.site-nav {
		position: fixed; inset: 0; background: #fff; flex-direction: column;
		align-items: flex-start; justify-content: flex-start; gap: 0; padding: 90px 30px 30px;
		transform: translateX(100%); transition: transform var(--transition);
		overflow-y: auto; z-index: 5;
	}
	.site-nav.is-open { transform: translateX(0); box-shadow: -10px 0 30px rgba(0,0,0,0.15); }
	.site-nav ul { flex-direction: column; align-items: flex-start; gap: 4px; width: 100%; }
	.site-nav ul li { width: 100%; }
	.site-nav ul a { display: block; padding: 12px 0; font-size: 0.95rem; }
	.lang-switch { margin-top: 20px; }
	.nav-toggle { display: flex; }
	.nav-toggle.is-open {
		position: fixed; top: 18px; right: 24px; z-index: 6;
	}
	.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
	.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
	.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

	.section--split,
	.section--technology,
	.section--split-cta,
	.contact-grid { grid-template-columns: 1fr; }
	.section--technology { padding: 50px 24px; }
	.technology__media { max-width: 320px; }

	.site-footer__inner { grid-template-columns: 1fr 1fr; }
	.results-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
	.section { padding: 50px 20px; }
	.page-hero { padding: 70px 20px 40px; }
	.hero { min-height: 70vh; }
	.hero__content { padding: 40px 20px 50px; }
	.steps-list__item { grid-template-columns: 50px 1fr; gap: 14px; }
	.steps-list__number { font-size: 1.6rem; }
	.results-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
	.gallery-preview { grid-template-columns: repeat(3, 1fr); }
	.site-footer__inner { grid-template-columns: 1fr; }
	.cookie-banner { left: 12px; right: 12px; bottom: 12px; padding: 16px; }
	.announcement-bar { font-size: 0.65rem; letter-spacing: 0.08em; gap: 8px; padding: 8px 10px; }
	.announcement-bar__slide { white-space: normal; line-height: 1.3; }
}