/* ==========================================================================
   Variables
   ========================================================================== */
:root {
  --ink-900: #17191c;
  --ink-800: #22272b;
  --ink-700: #343b40;
  --white: #ffffff;
  --gray-50: #f6f7f6;
  --gray-100: #eceeed;
  --gray-300: #d3d8d6;
  --gray-400: #9aa3a0;
  --gray-600: #5c6663;
  --accent: #6f7e77;
  --accent-dark: #57645d;

  --font-heading: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --max-width: 1180px;
  --radius: 10px;
  --shadow-sm: 0 2px 10px rgba(23, 25, 28, 0.06);
  --shadow-md: 0 10px 30px rgba(23, 25, 28, 0.10);
  --transition: 0.2s ease;
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink-900);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 600; margin: 0 0 0.6em; color: var(--ink-900); line-height: 1.2; }
p { margin: 0 0 1em; }
button { font-family: inherit; cursor: pointer; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink-900); color: var(--white);
  padding: 10px 16px; z-index: 200;
}
.skip-link:focus { left: 10px; top: 10px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow { max-width: 800px; }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn--primary { background: var(--accent); color: var(--white); }
.btn--primary:hover { background: var(--accent-dark); }
.btn--ghost { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.5); }
.btn--ghost:hover { background: rgba(255,255,255,0.1); border-color: var(--white); }
.btn--ghost-dark { background: transparent; color: var(--ink-900); border-color: var(--gray-300); }
.btn--ghost-dark:hover { background: var(--gray-50); border-color: var(--ink-900); }
.btn--sm { padding: 10px 18px; font-size: 0.875rem; }
.btn--block { width: 100%; padding: 15px 26px; }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--gray-100);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink-900); }
.brand__mark { color: var(--accent); display: flex; }
.brand__logo { height: 50px; width: auto; display: block; }
.brand__name { font-family: var(--font-heading); font-weight: 600; font-size: 1rem; letter-spacing: 0.03em; }

.main-nav ul { display: flex; gap: 32px; }
.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-800);
  position: relative;
  padding: 6px 0;
}
.main-nav a::after {
  content: '';
  position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--accent);
  transition: width var(--transition);
}
.main-nav a:hover::after { width: 100%; }
.main-nav a.is-active { color: var(--ink-900); }
.main-nav a.is-active::after { width: 100%; background: var(--accent-dark); }

.header__actions { display: flex; align-items: center; gap: 16px; }
.lang-switch {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-800);
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  padding: 6px 12px;
  transition: border-color var(--transition), color var(--transition);
}
.lang-switch:hover { border-color: var(--ink-900); color: var(--ink-900); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none; border: none;
}
.nav-toggle span {
  display: block; height: 2px; width: 22px; background: var(--ink-900);
  transition: transform var(--transition), opacity var(--transition);
  margin: 0 auto;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  background:
    linear-gradient(100deg, rgba(23,25,28,0.96) 0%, rgba(23,25,28,0.86) 32%, rgba(23,25,28,0.55) 60%, rgba(23,25,28,0.3) 100%),
    url('../assets/hero-skyline.jpg') center right / cover no-repeat;
  color: var(--white);
  overflow: hidden;
}
.hero__inner {
  display: block;
  padding: 120px 24px 140px;
  min-height: 560px;
}
.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.eyebrow--center { text-align: center; }
.eyebrow--ondark { color: var(--accent); }
.hero__content h1 {
  color: var(--white);
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  max-width: 640px;
}
.hero__lead {
  color: rgba(255,255,255,0.82);
  font-size: 1.05rem;
  max-width: 520px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 28px; }
.hero__stats { display: flex; gap: 40px; margin-top: 40px; }
.hero__stat strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.9rem;
  color: var(--white);
}
.hero__stat span { font-size: 0.85rem; color: rgba(255,255,255,0.65); }

.scroll-cue {
  position: absolute;
  bottom: 26px;
  left: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.7);
  font-size: 0.8rem;
}

/* ==========================================================================
   Sections (generic)
   ========================================================================== */
.section { padding: 96px 0; }
.section--alt { background: var(--gray-50); }
.section--dark { background: var(--ink-900); color: var(--white); }
.section-title {
  text-align: center;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.section-title--ondark { color: var(--white); }
.section-title--left { text-align: left; margin: 0 0 0.6em; }
.section-lead {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 48px;
  color: var(--gray-600);
  font-size: 1.02rem;
}
.section-title + .section-lead { margin-top: -0.4em; }

/* ==========================================================================
   Services
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.service-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--gray-50);
  color: var(--accent);
  margin-bottom: 20px;
}
.service-card__icon svg { width: 26px; height: 26px; }
.service-card h3 { font-size: 1.12rem; margin-bottom: 12px; }
.service-card p { color: var(--gray-600); font-size: 0.95rem; }

.service-card__more { margin-top: 14px; }
.service-card__more summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--ink-800);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.service-card__more summary::-webkit-details-marker { display: none; }
.service-card__more summary::after {
  content: '→';
  transition: transform var(--transition);
}
.service-card__more[open] summary::after { transform: rotate(90deg); }
.service-card__more p {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--gray-100);
  color: var(--gray-600);
  font-size: 0.9rem;
}

.service-card__link {
  display: inline-block;
  margin-top: 16px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-dark);
  transition: color var(--transition);
}
.service-card__link:hover { color: var(--ink-900); }

/* ==========================================================================
   Page intro (páginas internas: Servicios, Sobre mí, Contacto, Aviso)
   ========================================================================== */
.page-intro { padding: 64px 0 16px; text-align: center; }
.page-intro .section-title { margin-top: 0; }
.section--flush-top { padding-top: 0; }

/* ==========================================================================
   Legal page helpers (Aviso de privacidad / Privacy notice)
   ========================================================================== */
.legal-list { list-style: disc; padding-left: 22px; color: var(--gray-600); margin-bottom: 1em; }
.legal-note {
  margin-top: 32px;
  padding: 20px;
  background: var(--gray-50);
  border-radius: var(--radius);
  font-size: 0.88rem;
  color: var(--gray-600);
}

/* ==========================================================================
   Utility
   ========================================================================== */
.footer__logo { height: 52px; width: auto; margin-bottom: 16px; }
.mt-28 { margin-top: 28px; }
.visually-hidden-field { display: none; }

/* ==========================================================================
   Service detail list (página Servicios)
   ========================================================================== */
.service-detail-list { margin-top: 40px; }
.service-detail {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding: 40px 0;
  border-bottom: 1px solid var(--gray-100);
}
.service-detail:first-child { padding-top: 0; }
.service-detail:last-child { border-bottom: none; }
.service-detail__icon { color: var(--accent); padding-top: 4px; }
.service-detail__icon svg { width: 36px; height: 36px; }
.service-detail h2 { font-size: 1.25rem; margin-bottom: 10px; }
.service-detail p { color: var(--gray-600); }
.service-detail__cta {
  display: inline-block;
  margin-top: 14px;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--accent-dark);
}
.service-detail__cta:hover { color: var(--ink-900); }

/* ==========================================================================
   Contact quick info (página Contacto)
   ========================================================================== */
.contact-quick {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 28px;
  margin: 0 0 48px;
  color: var(--gray-600);
  font-size: 0.95rem;
}
.contact-quick a { font-weight: 600; color: var(--ink-800); }
.contact-quick a:hover { color: var(--accent-dark); }

/* ==========================================================================
   About teaser ("Por qué trabajar conmigo")
   ========================================================================== */
.about-teaser__inner {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: center;
}
.about-teaser__photo img {
  width: 100%;
  filter: drop-shadow(0 14px 22px rgba(23, 25, 28, 0.16));
}
.about-teaser__text p { color: var(--gray-600); }
.about-teaser__stats { display: flex; gap: 40px; margin-top: 28px; }
.about-teaser__stats strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.7rem;
  color: var(--ink-900);
}
.about-teaser__stats span { font-size: 0.82rem; color: var(--gray-600); }

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta-band { text-align: center; }
.cta-band .section-title { color: var(--white); }
.cta-band p {
  color: rgba(255,255,255,0.72);
  max-width: 540px;
  margin: 0 auto 32px;
}

/* ==========================================================================
   Timeline / Metodología
   ========================================================================== */
.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 56px;
  counter-reset: step;
}
.timeline__step {
  position: relative;
  padding-top: 20px;
  border-top: 2px solid var(--accent);
}
.timeline__number {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 10px;
}
.timeline__step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.timeline__step p { color: var(--gray-600); font-size: 0.92rem; }

/* ==========================================================================
   Value cards
   ========================================================================== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.value-card { padding: 8px; }
.value-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px; height: 46px;
  color: var(--ink-800);
  margin-bottom: 16px;
}
.value-card__icon svg { width: 30px; height: 30px; }
.value-card h3 { font-size: 1.02rem; margin-bottom: 8px; }
.value-card p { color: var(--gray-600); font-size: 0.92rem; }

/* ==========================================================================
   Audience
   ========================================================================== */
.audience-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 40px;
}
.audience-grid li {
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 30px;
  padding: 10px 22px;
  font-size: 0.92rem;
  color: rgba(255,255,255,0.9);
}

/* ==========================================================================
   International
   ========================================================================== */
.international__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.international__text p { color: var(--gray-600); }
.international__visual { display: flex; justify-content: center; }
.international__visual svg { width: 100%; max-width: 380px; }

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.accordion { margin-top: 40px; display: flex; flex-direction: column; gap: 12px; }
.accordion__item {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 6px 22px;
}
.accordion__item summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 0;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--ink-900);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.accordion__item summary::-webkit-details-marker { display: none; }
.accordion__item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.accordion__item[open] summary::after { transform: rotate(45deg); }
.accordion__item p { color: var(--gray-600); padding-bottom: 18px; margin: 0; font-size: 0.94rem; }

/* ==========================================================================
   Contact form
   ========================================================================== */
.contact-form { margin-top: 40px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-field { margin-bottom: 20px; }
.form-field label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink-800);
}
.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="file"],
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--white);
  color: var(--ink-900);
  transition: border-color var(--transition);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  outline: none;
}
.form-field textarea { resize: vertical; }
.form-field--checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.form-field--checkbox input { margin-top: 4px; }
.form-field--checkbox label { font-weight: 400; margin: 0; font-size: 0.88rem; color: var(--gray-600); }
.form-field--checkbox a { color: var(--accent); font-weight: 600; }

.form-status {
  margin-top: 16px;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  min-height: 1.2em;
}
.form-status.is-success { color: #2a7a4f; }
.form-status.is-error { color: #b3413a; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--ink-900);
  color: rgba(255,255,255,0.75);
  padding: 72px 0 32px;
  font-size: 0.9rem;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  margin-bottom: 28px;
}
.brand__name--footer {
  display: block;
  color: var(--white);
  font-size: 1.05rem;
  margin-bottom: 16px;
}
.footer__contact { line-height: 1.9; }
.footer__social { display: flex; gap: 12px; margin-top: 16px; }
.footer__social a {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--white);
  transition: background var(--transition);
}
.footer__social a:hover { background: var(--accent); }

.footer__col h4 {
  color: var(--white);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}
.footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__col a:hover { color: var(--white); }

.footer__disclaimer {
  font-size: 0.8rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
  max-width: 900px;
}
.footer__copy { font-size: 0.8rem; color: rgba(255,255,255,0.45); margin-top: 16px; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .international__inner { grid-template-columns: 1fr; }
  .international__visual { order: -1; }
  .about-teaser__inner { grid-template-columns: 1fr; }
  .about-teaser__photo { max-width: 320px; margin: 0 auto; }
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: 88px; left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-100);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }
  .main-nav.is-open { max-height: 400px; }
  .main-nav ul { flex-direction: column; gap: 0; padding: 8px 24px 20px; }
  .main-nav a { display: block; padding: 14px 0; border-bottom: 1px solid var(--gray-100); }
  .nav-toggle { display: flex; }
  .header__actions .btn--sm { display: none; }
  .hero__inner { padding: 72px 24px 96px; min-height: 0; }
  .hero {
    background:
      linear-gradient(180deg, rgba(23,25,28,0.88), rgba(23,25,28,0.82)),
      url('../assets/hero-skyline.jpg') center right / cover no-repeat;
  }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .services-grid,
  .values-grid,
  .timeline { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { width: 100%; }
  .hero__stats, .about-teaser__stats { gap: 24px; }
  .service-detail { grid-template-columns: 1fr; }
}