/* ==========================================================================
   Design tokens
   ========================================================================== */

:root {
  --color-background: #030712;
  --color-surface: #0b0f19;
  --color-surface-raised: #111827;
  --color-border: #1f2937;
  --color-border-strong: #4b5563;
  --color-text: #e5e7eb;
  --color-text-muted: #9ca3af;
  --color-text-faint: #6b7280;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-accent-soft: rgba(59, 130, 246, 0.12);

  --font-display: "Montserrat", "Helvetica Neue", sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;

  --container-width: 1080px;
  --header-height: 72px;
  --transition-base: 0.3s ease;
}

/* ==========================================================================
   Base
   ========================================================================== */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;

  /* Subtle grain texture for depth */
  background-image: radial-gradient(
    circle at 50% 0%,
    rgba(59, 130, 246, 0.05),
    transparent 60%
  );
}

.container {
  width: min(var(--container-width), 100% - 3rem);
  margin-inline: auto;
}

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

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

.accent {
  color: var(--color-accent);
}

/* Foco de teclado visible en todo el sitio */
:focus-visible {
  outline: 2px solid var(--color-accent-hover);
  outline-offset: 3px;
}

/* Skip link (accesibilidad) */
.skip-link {
  position: absolute;
  top: -4rem;
  left: 1rem;
  z-index: 200;
  padding: 0.7rem 1.25rem;
  background: var(--color-accent);
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 0 0 4px 4px;
  transition: top 0.2s ease;
}

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

/* ==========================================================================
   Header & navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(3, 7, 18, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
}

.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  transition: color var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link-cta {
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--color-accent);
  border-radius: 2px;
  color: var(--color-accent);
}

.nav-link-cta:hover {
  background: var(--color-accent);
  color: var(--color-background);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition:
    transform var(--transition-base),
    opacity var(--transition-base);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-block;
  padding: 0.8rem 1.9rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    transform var(--transition-base);
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-ghost {
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  min-height: calc(100vh - var(--header-height));
  min-height: calc(100svh - var(--header-height));
  display: flex;
  align-items: center;
  position: relative;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 4rem;
  align-items: center;
}

.hero-portrait {
  position: relative;
  justify-self: end;
  max-width: 380px;
}

.hero-portrait img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
  /* Duotono sutil para integrar la foto al tema oscuro */
  filter: grayscale(1) contrast(1.05) brightness(0.95);
  transition: filter var(--transition-base), transform var(--transition-base);
}

.hero-portrait::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: 4px;
  transform: translate(14px, 14px);
  pointer-events: none;
  z-index: -1;
}

.hero-content {
  max-width: 780px;
}

.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5.2rem);
  font-weight: 400;
  line-height: 1.05;
  margin-bottom: 1.75rem;
}

.hero-title em {
  font-style: italic;
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
}

.hero-scroll span {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scroll-hint 2s ease-in-out infinite;
}

@keyframes scroll-hint {
  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(0.7);
    transform-origin: top;
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

/* En pantallas bajas el indicador estorba a los CTAs */
@media (max-height: 640px) {
  .hero-scroll {
    display: none;
  }
}

/* ==========================================================================
   Sections
   ========================================================================== */

.section {
  padding: 6.5rem 0;
}

.section-alt {
  background: var(--color-surface);
  border-block: 1px solid var(--color-border);
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.section-number {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 400;
}

/* ==========================================================================
   About
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p + p {
  margin-top: 1.25rem;
}

.about-text {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.fact {
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.fact-value {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--color-accent);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.fact-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* Credibility strip + education */

.cred-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.cred-badge {
  padding: 0.45rem 0.85rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  transition:
    color var(--transition-base),
    border-color var(--transition-base);
}

.cred-badge:hover {
  color: var(--color-accent-hover);
  border-color: var(--color-accent);
}

.cred-more {
  font-size: 0.82rem;
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-base);
}

.cred-more:hover {
  color: var(--color-accent-hover);
}

.edu-list {
  list-style: none;
  display: grid;
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.edu-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1rem;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.edu-list strong {
  font-weight: 600;
  color: var(--color-text);
}

/* ==========================================================================
   Experience timeline
   ========================================================================== */

.timeline {
  list-style: none;
  display: grid;
  position: relative;
}

/* Rail vertical de la línea de tiempo */
.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75rem;
  bottom: 0.75rem;
  width: 1px;
  background: linear-gradient(
    to bottom,
    var(--color-accent),
    var(--color-border) 12%,
    var(--color-border)
  );
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2.5rem;
  padding: 2.25rem 0 2.25rem 2.25rem;
  position: relative;
}

/* Nodo por cada puesto — centrado sobre el rail de 1px */
.timeline-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 2.85rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-background);
  border: 2px solid var(--color-accent);
}

.timeline-period {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  padding-top: 0.35rem;
}

.timeline-role {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.timeline-company {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

.timeline-description {
  color: var(--color-text-muted);
  max-width: 620px;
}

/* ==========================================================================
   Projects
   ========================================================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.project-card {
  padding: 2.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition:
    border-color var(--transition-base),
    transform var(--transition-base);
}

.project-index {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 0.15em;
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
}

.project-description {
  color: var(--color-text-muted);
  flex-grow: 1;
}

.project-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tags li {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Skills
   ========================================================================== */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.skill-group {
  padding: 2rem;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.skill-group-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.skill-list {
  list-style: none;
  display: grid;
  gap: 0.65rem;
}

.skill-list li {
  color: var(--color-text-muted);
  padding-left: 1.25rem;
  position: relative;
}

.skill-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ==========================================================================
   Services — "¿Cómo puedo ayudarte?"
   ========================================================================== */

.services-lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: -1.75rem 0 3rem;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.service-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition:
    border-color var(--transition-base),
    transform var(--transition-base);
}

.service-label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

.service-want {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-text);
}

.service-want .service-label {
  color: var(--color-accent);
}

.service-how p,
.service-outcome p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.service-how {
  flex-grow: 1;
}

.service-outcome {
  padding: 1rem 1.25rem;
  background: var(--color-accent-soft);
  border-left: 2px solid var(--color-accent);
  border-radius: 0 4px 4px 0;
}

.service-outcome p {
  color: var(--color-text);
}

.services-catalog {
  margin-top: 4.5rem;
}

.services-catalog-title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  font-weight: 500;
  margin-bottom: 2rem;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.catalog-more {
  margin-top: 1.75rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.trainer-note {
  margin-top: 3.5rem;
  padding: 1.5rem 1.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 2px solid var(--color-accent);
  border-radius: 0 4px 4px 0;
}

.trainer-note p {
  margin-top: 0.4rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.catalog-grid .skill-list li {
  font-size: 0.92rem;
}

.catalog-grid .skill-list strong {
  color: var(--color-text);
  font-weight: 500;
}

.catalog-grid .skill-list span {
  color: var(--color-text-muted);
}

.services-cta {
  margin-top: 3rem;
  text-align: center;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-wrapper {
  max-width: 720px;
}

.contact-lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Scroll reveal animations
   ========================================================================== */

/* Animación de reveal solo con JS activo (html.js): sin JS, todo visible */
html.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

html.js .reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Impresión: revelar todo el contenido y limpiar elementos decorativos */
@media print {
  html.js .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .hero-scroll,
  .skip-link {
    display: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-scroll span {
    animation: none;
  }
}

/* ==========================================================================
   Hover con elevación — solo dispositivos con hover real (evita hover pegajoso
   en touch)
   ========================================================================== */

@media (hover: hover) {
  .btn:hover {
    transform: translateY(-2px);
  }

  .project-card:hover,
  .service-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
  }

  .hero-portrait:hover img {
    filter: grayscale(0.6) contrast(1.05);
    transform: translateY(-4px);
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 860px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-portrait {
    justify-self: center;
    max-width: 300px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-facts {
    grid-template-columns: repeat(2, 1fr);
  }

  .catalog-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .services-lead {
    margin-top: -2.5rem;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    padding-left: 1.75rem;
  }
}

/* ==========================================================================
   Language toggle
   ========================================================================== */

.lang-toggle {
  background: none;
  border: 1px solid var(--color-border-strong);
  border-radius: 2px;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  transition:
    color var(--transition-base),
    border-color var(--transition-base);
}

.lang-toggle:hover {
  color: var(--color-accent-hover);
  border-color: var(--color-accent);
}

.nav-menu .lang-toggle {
  margin-left: 0.5rem;
}

/* ==========================================================================
   Contact links
   ========================================================================== */

.contact-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.contact-details {
  list-style: none;
  display: grid;
  gap: 0.9rem;
  margin-top: 2.75rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--color-border);
}

.contact-details li {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.contact-details .contact-label {
  min-width: 110px;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.contact-details a {
  color: var(--color-text);
  transition: color var(--transition-base);
}

.contact-details a:hover {
  color: var(--color-accent-hover);
}

@media (max-width: 1024px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 18px 36px rgba(0, 0, 0, 0.45);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .nav-menu.open {
    max-height: 620px;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu .nav-link {
    display: block;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 0;
  }

  .nav-menu .nav-link-cta {
    background: none;
    color: var(--color-accent);
  }

  .nav-menu .lang-toggle {
    margin: 1rem 1.5rem;
  }

  .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);
  }
}

@media (max-width: 640px) {
  .contact-details li {
    flex-direction: column;
    gap: 0.25rem;
  }

  .about-facts {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 4.5rem 0;
  }
}