:root {
  --bg: #f3f4f6;
  --bg-soft: #e5e7eb;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.06);
  --accent-strong: #1d4ed8;
  --text: #111827;
  --muted: #4b5563;
  --border-subtle: rgba(148, 163, 184, 0.5);
  --card-bg: #ffffff;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.15);
  --radius-card: 20px;
  --radius-pill: 999px;
  --transition-fast: 150ms ease-out;
  --transition-normal: 230ms ease-out;
  --transition-slow: 420ms ease;
}

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  font-size: 17px;
}

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

a:hover {
  text-decoration: underline;
}

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

/* FONDO INTERACTIVO (muy suave, no hacker) */
html,
body {
  --pointer-x: 50vw;
  --pointer-y: 30vh;
}

.bg-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
}

.bg-layer--base {
  background: radial-gradient(
    circle at top,
    #ffffff 0,
    #f3f4f6 40%,
    #e5e7eb 100%
  );
}

.bg-layer--glow {
  background: radial-gradient(
      420px at var(--pointer-x) var(--pointer-y),
      rgba(37, 99, 235, 0.09),
      transparent 70%
    ),
    radial-gradient(circle at 8% 10%, rgba(59, 130, 246, 0.06), transparent 55%);
  mix-blend-mode: screen;
  opacity: 0.7;
}

/* LAYOUT GENERAL */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.6rem;
}

.section {
  padding: 3.3rem 0 3.1rem; /* menos margen vertical */
}

.section-header {
  margin-bottom: 1.9rem;
}

.section-title {
  font-size: clamp(2.1rem, 3vw, 2.5rem);
  letter-spacing: -0.05em;
  margin: 0 0 0.4rem;
}

.section-subtitle {
  margin: 0;
  font-size: 1rem;
  color: var(--muted);
}

/* HEADER */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(209, 213, 219, 0.8);
  transition: background var(--transition-slow),
    border-color var(--transition-slow), box-shadow var(--transition-slow),
    transform var(--transition-normal);
}

.site-header--scrolled {
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  transform: translateY(-1px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  gap: 0.75rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.logo-mark {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, #60a5fa, #2563eb);
  box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.45),
    0 0 18px rgba(37, 99, 235, 0.5);
}

.logo-text {
  font-size: 0.88rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #6b7280;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-link {
  position: relative;
  font-size: 0.95rem;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  color: #6b7280;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
}

.nav-link:hover {
  color: #111827;
  background: rgba(229, 231, 235, 0.6);
}

.nav-link--active {
  color: #111827;
  background: rgba(219, 234, 254, 0.9);
}

.nav-link--active::after {
  transform: scaleX(1);
}

/* SWITCH DE IDIOMA */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.18rem;
  border-radius: var(--radius-pill);
  background: rgba(243, 244, 246, 0.9);
  border: 1px solid rgba(209, 213, 219, 0.9);
}

.lang-btn {
  border: none;
  background: transparent;
  padding: 0.18rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  color: #6b7280;
  transition: background var(--transition-fast), color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast);
}

.lang-btn--active {
  background: #111827;
  color: #f9fafb;
  transform: translateY(-0.5px);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.35);
}

/* HERO */
.hero {
  padding-top: 4.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1.1fr);
  gap: 2.6rem;
  align-items: center;
}

.hero-kicker {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.23em;
  color: #6b7280;
  margin: 0 0 0.8rem;
}

.hero-title {
  margin: 0 0 0.9rem;
  font-size: clamp(2.4rem, 3.4vw, 2.9rem);
  letter-spacing: -0.07em;
  line-height: 1.05;
}

.hero-subtitle {
  margin: 0 0 1.4rem;
  font-size: 1.02rem;
  color: var(--muted);
  max-width: 40rem;
}

.hero-subtitle strong {
  color: #111827;
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1.1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.78rem 1.4rem;
  font-size: 0.95rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  background: transparent;
  color: #111827;
  transition: background var(--transition-normal), color var(--transition-fast),
    border-color var(--transition-normal), transform var(--transition-fast),
    box-shadow var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(120deg, var(--accent-strong), var(--accent));
  color: #f9fafb;
  font-weight: 600;
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.5);
  text-decoration: none;
}

.btn-ghost {
  border-color: rgba(148, 163, 184, 0.8);
  background: #ffffff;
  color: #374151;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: #f9fafb;
  text-decoration: none;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.88rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 1.05rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: #ffffff;
  color: #4b5563;
}

/* HERO PREVIEW */
.hero-preview {
  display: flex;
  justify-content: center;
}

.hero-device {
  max-width: 440px;
  width: 100%;
}

.hero-device-screen {
  position: relative;
  border-radius: 28px;
  border: 1px solid rgba(209, 213, 219, 0.9);
  background: #ffffff;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  padding: 0.7rem;
}

.hero-screen-img {
  width: 100%;
  border-radius: 22px;
  display: block;
  object-fit: cover;
}

.hero-device-overlay {
  position: absolute;
  inset: auto 1.1rem 1.1rem auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(209, 213, 219, 0.9);
}

.hero-avatar-wrapper {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid rgba(209, 213, 219, 0.9);
}

.hero-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-device-text {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.hero-device-name {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 600;
  color: #111827;
}

.hero-device-role {
  margin: 0;
  font-size: 0.8rem;
  color: #6b7280;
}

.hero-device-note {
  margin: 0;
  font-size: 0.78rem;
  color: #6b7280;
}

.hero-device-caption {
  margin: 0.7rem 0 0;
  font-size: 0.9rem;
  color: #6b7280;
}

/* ABOUT */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1.1fr);
  gap: 2.2rem;
  align-items: flex-start;
}

.about-text {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.8;
}

.about-text strong {
  color: #111827;
  font-weight: 600;
}

.about-side {
  max-width: 360px;
  margin-left: auto;
}

.about-card {
  border-radius: 18px;
  border: 1px solid var(--border-subtle);
  background: var(--card-bg);
  padding: 1.4rem 1.5rem 1.3rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

.about-label {
  margin: 0 0 0.6rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: #6b7280;
}

.about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.about-list li {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
  margin-bottom: 0.55rem;
}

.about-list i {
  margin-top: 0.22rem;
  color: var(--accent);
}

/* SKILLS */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.2rem;
}

.skill-card {
  border-radius: 18px;
  border: 1px solid var(--border-subtle);
  background: var(--card-bg);
  padding: 1.2rem 1.3rem;
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal), border-color var(--transition-normal),
    background var(--transition-normal);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.skill-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.12);
  border-color: rgba(129, 140, 248, 0.7);
  background: #ffffff;
}

.skill-title {
  margin: 0 0 0.45rem;
  font-size: 0.98rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #6b7280;
}

.skill-body {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

/* PROYECTOS */
.projects-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.6rem;
}

.project-card {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.5fr);
  gap: 1.4rem;
  padding: 1.3rem 1.4rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-subtle);
  background: var(--card-bg);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal), border-color var(--transition-normal),
    background var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.15);
  border-color: rgba(129, 140, 248, 0.9);
}

.project-media {
  border-radius: 16px;
  overflow: hidden;
  background: #e5e7eb;
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform 0.7s ease, filter 0.4s ease;
  filter: saturate(1.02);
}

.project-card:hover .project-media img {
  transform: scale(1.05);
  filter: saturate(1.08) brightness(1.03);
}

.project-content {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.project-title {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: #111827;
}

.project-tagline {
  margin: 0;
  font-size: 0.96rem;
  color: #4b5563;
}

.project-desc {
  margin: 0.4rem 0 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.project-meta {
  margin: 0.25rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.project-stack {
  margin: 0.45rem 0 0;
  font-size: 0.88rem;
  color: #111827;
  font-weight: 500;
}

/* CONTACTO */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.1fr);
  gap: 2rem;
}

.contact-text {
  font-size: 1rem;
  color: var(--muted);
  margin: 0 0 0.7rem;
}

.contact-info {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  font-size: 0.95rem;
}

.contact-info li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.55rem;
}

.contact-info i {
  width: 18px;
  text-align: center;
  color: var(--accent);
}

/* Botón para copiar correo (se ve como link) */
.contact-copy-btn {
  border: none;
  background: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  font: inherit;
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.contact-card {
  border-radius: 18px;
  border: 1px solid var(--border-subtle);
  background: var(--card-bg);
  padding: 1.3rem 1.4rem;
  font-size: 0.95rem;
  color: var(--muted);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
}

.contact-card-title {
  margin: 0 0 0.6rem;
  font-weight: 600;
  font-size: 1rem;
  color: #111827;
}

.contact-card-body {
  margin: 0 0 0.7rem;
}

.contact-card-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

/* FOOTER */
.site-footer {
  border-top: 1px solid rgba(209, 213, 219, 0.9);
  padding: 1.4rem 0 1.8rem;
  background: #f9fafb;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  font-size: 0.9rem;
  color: #6b7280;
}

.footer-links a {
  margin-left: 0.9rem;
  font-size: 0.9rem;
}

/* BOTÓN VOLVER ARRIBA */
.back-to-top {
  position: fixed;
  right: 1.3rem;
  bottom: 1.3rem;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.9);
  background: #ffffff;
  color: #4b5563;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.15);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--transition-normal),
    transform var(--transition-normal), background var(--transition-fast),
    color var(--transition-fast), border-color var(--transition-fast);
  z-index: 35;
}

.back-to-top--visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent);
  color: #f9fafb;
  border-color: transparent;
}

/* ANIMACIONES SCROLL */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease-out, transform 0.55s ease-out;
}

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

[data-animate="fade-left"] {
  transform: translateX(20px);
}

[data-animate="fade-right"] {
  transform: translateX(-20px);
}

[data-animate="fade-left"].reveal--visible,
[data-animate="fade-right"].reveal--visible {
  transform: translateX(0);
}

/* TOAST de "correo copiado" */
.copy-toast {
  position: fixed;
  left: 50%;
  bottom: 1.4rem;
  transform: translateX(-50%) translateY(12px);
  background: #111827;
  color: #f9fafb;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease-out, transform 0.2s ease-out;
  z-index: 50;
}

.copy-toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* RESPONSIVE */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }

  .hero-preview {
    order: -1;
  }

  .projects-grid {
    gap: 1.3rem;
  }

  .project-card {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .about-side {
    max-width: 100%;
    margin-left: 0;
  }

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

  .header-inner {
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  .nav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

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

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .container {
    padding: 0 1.1rem;
  }

  .back-to-top {
    right: 1rem;
    bottom: 1rem;
  }
}

/* Canvas para playground de órbitas */
.project-media--canvas {
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  min-height: 230px;
}

.project-media--canvas canvas {
  width: 100%;
  height: 100%;
  border-radius: 16px;
  background: radial-gradient(
    circle at 15% 0%,
    #dbeafe,
    #1d4ed8 40%,
    #020617 100%
  );
  display: block;
}