/* Firmware Factory — Hoja de estilos principal
   Sin frameworks externos. Fuentes vía Google Fonts (cargadas en head.html).
   Breakpoints: 768px (tablet), 1024px (desktop) */

/* ── Variables de color (extraídas de los SVG del canal) ────────────────────── */
:root {
  /* Fondos */
  --bg-primary:   #0a2a2a;
  --bg-secondary: #1a4040;
  --bg-deep:      #0f2626;
  --bg-panel:     #2a5555;
  --bg-chip:      #1e293b;

  /* Acentos */
  --accent-teal:  #2dd4bf;
  --accent-cyan:  #22d3ee;
  --accent-green: #4ade80;
  --accent-deep:  #06b6d4;

  /* Gradiente del logo */
  --grad-start: #a7f3d0;
  --grad-mid:   #67e8f9;
  --grad-end:   #22d3ee;

  /* Texto */
  --text-primary: #a7f3d0;
  --text-muted:   #94a3b8;
  --text-dim:     #557a7a;

  /* Bordes */
  --border:        rgba(45, 212, 191, 0.2);
  --border-bright: #2dd4bf;

  /* Tipografía */
  --font-heading: 'Exo 2', sans-serif;
  --font-mono:    'Share Tech Mono', 'Courier New', monospace;
  --font-body:    'Exo 2', sans-serif;

  /* Espaciado */
  --section-gap: 5rem;
  --container:   1200px;
  --radius:      6px;
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--accent-cyan); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-teal); }

/* ── Patrón de cuadrícula (fondo decorativo del branding) ─────────────────── */
.grid-bg {
  background-image:
    linear-gradient(rgba(45,212,191,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45,212,191,0.05) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* ── Contenedor centrado ─────────────────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Tipografía ──────────────────────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

.mono { font-family: var(--font-mono); }

.gradient-text {
  background: linear-gradient(135deg, var(--grad-start), var(--grad-mid), var(--grad-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Navbar ──────────────────────────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 42, 42, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(45, 212, 191, 0.13);
  padding: 0 1.5rem;
}

.navbar__inner {
  max-width: var(--container);
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.navbar__logo { height: 40px; width: auto; }

.navbar__title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-primary);
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.navbar__nav a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  text-transform: uppercase;
  transition: color 0.2s;
}

.navbar__nav a:hover { color: var(--accent-teal); }

.btn-subscribe {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-teal);
  border: 1px solid var(--accent-teal);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius);
  transition: background-color 0.2s, color 0.2s;
  white-space: nowrap;
}

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

/* Hamburguesa móvil */
.navbar__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
}

.navbar__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  margin: 4px 0;
  transition: transform 0.3s, opacity 0.3s;
}

/* ── Hero ────────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 5rem 1.5rem 4rem;
  min-height: 560px;
  display: flex;
  align-items: center;
}

.hero__container {
  max-width: var(--container);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.hero__tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.2; }
}

.hero__title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.hero__title span { color: var(--accent-teal); }

.hero__description {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 500px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-teal);
  color: var(--bg-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  transition: background-color 0.2s, transform 0.15s;
  text-decoration: none;
}

.btn-primary:hover {
  background: var(--accent-cyan);
  color: var(--bg-primary);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.65rem 1.4rem;
  border: 1px solid var(--bg-panel);
  border-radius: var(--radius);
  transition: border-color 0.2s, color 0.2s;
  text-decoration: none;
}

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

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

.hero__banner {
  width: 100%;
  max-width: 480px;
  border-radius: 8px;
  opacity: 0.92;
  filter: drop-shadow(0 0 32px rgba(45, 212, 191, 0.15));
}

/* ── Barra de stats ──────────────────────────────────────────────────────────── */
.stats {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 2rem 1.5rem;
}

.stats__grid {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 4rem;
  flex-wrap: wrap;
}

.stats__item { text-align: center; }

.stats__number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-teal);
  letter-spacing: -0.02em;
}

.stats__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

/* ── Sección de temas (Topics) ───────────────────────────────────────────────── */
.section { padding: var(--section-gap) 1.5rem; }

.section__header {
  max-width: var(--container);
  margin: 0 auto 3rem;
}

.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-teal);
  margin-bottom: 0.5rem;
}

.section__title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--text-primary);
}

.topics__grid {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.topic-card {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
  cursor: default;
}

.topic-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-2px);
}

.topic-card__icon {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
  color: var(--accent-cyan);
}

.topic-card__name {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.topic-card__desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Cards de videos recientes ───────────────────────────────────────────────── */
.videos__grid {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.video-card {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
}

.video-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-3px);
}

.video-card__thumb {
  aspect-ratio: 16/9;
  background: var(--bg-chip);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-card__code {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--accent-teal);
  opacity: 0.35;
  white-space: pre;
  text-align: left;
  padding: 1rem;
  line-height: 1.6;
  user-select: none;
}

.video-card__play {
  position: absolute;
  width: 44px;
  height: 44px;
  background: rgba(45, 212, 191, 0.15);
  border: 2px solid var(--accent-teal);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
}

.video-card:hover .video-card__play {
  background: rgba(45, 212, 191, 0.3);
}

.video-card__body { padding: 1.25rem; flex: 1; display: flex; flex-direction: column; }

.video-card__tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

.video-card__title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  flex: 1;
  margin-bottom: 0.75rem;
}

.video-card__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* ── CTA de suscripción ──────────────────────────────────────────────────────── */
.cta {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 4rem 1.5rem;
  text-align: center;
}

.cta__inner { max-width: 600px; margin: 0 auto; }

.cta__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 0.75rem;
}

.cta__desc {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 2rem;
}

/* ── Footer ──────────────────────────────────────────────────────────────────── */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
}

.footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer__logo { height: 28px; }

.footer__name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.footer__links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer__links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.footer__links a:hover { color: var(--accent-teal); }

.footer__copy {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
}

/* ── Páginas de contenido (proyectos, descargas, sobre mí) ───────────────────── */
.page-header {
  background: var(--bg-deep);
  border-bottom: 1px solid var(--border);
  padding: 3rem 1.5rem 2.5rem;
}

.page-header__inner { max-width: var(--container); margin: 0 auto; }

.page-header__title { font-size: clamp(1.8rem, 4vw, 2.8rem); }

.page-header__desc {
  color: var(--text-muted);
  margin-top: 0.5rem;
  font-size: 1rem;
}

/* ── Grid de proyectos ───────────────────────────────────────────────────────── */
.projects__filters {
  max-width: var(--container);
  margin: 2rem auto 1.5rem;
  padding: 0 1.5rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background-color 0.15s;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  background: rgba(45, 212, 191, 0.07);
}

.projects__grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}

.project-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-2px);
}

.project-card__tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
}

.badge--principiante { background: rgba(74, 222, 128, 0.15); color: var(--accent-green); }
.badge--intermedio   { background: rgba(34, 211, 238, 0.15); color: var(--accent-cyan); }
.badge--avanzado     { background: rgba(6, 182, 212, 0.15);  color: var(--accent-deep); }
.badge--tag          { background: rgba(45, 212, 191, 0.1);  color: var(--text-dim); }

.project-card__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-card__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1rem;
}

.project-card__links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.project-card__links a {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.project-card__links a:hover { color: var(--accent-teal); }

/* ── Página individual de proyecto ──────────────────────────────────────────── */
.post { max-width: 780px; margin: 3rem auto; padding: 0 1.5rem 4rem; }

.post__meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.post__title {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  margin-bottom: 1rem;
}

.post__content { color: var(--text-muted); }

.post__content p  { margin-bottom: 1.2em; }
.post__content h2 { margin: 2em 0 0.75em; color: var(--text-primary); }
.post__content h3 { margin: 1.5em 0 0.6em; color: var(--text-primary); }
.post__content ul,
.post__content ol { padding-left: 1.5em; margin-bottom: 1.2em; }
.post__content li { margin-bottom: 0.4em; }

.post__content pre {
  background: var(--bg-deep);
  border-left: 3px solid var(--accent-teal);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.5em 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.post__content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-deep);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--accent-cyan);
}

.post__content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* ── Lista de descargas ──────────────────────────────────────────────────────── */
.downloads { max-width: var(--container); margin: 0 auto; padding: 2rem 1.5rem 4rem; }

.download-category { margin-bottom: 2.5rem; }

.download-category__title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-teal);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.download-item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1rem 1.25rem;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.6rem;
  transition: border-color 0.2s;
  text-decoration: none;
}

.download-item:hover { border-color: var(--border-bright); }

.download-item__icon {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--accent-cyan);
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}

.download-item__info { flex: 1; }

.download-item__title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.download-item__desc {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.download-item__meta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  text-align: right;
  flex-shrink: 0;
}

/* ── Chip decorativo (elemento de branding) ──────────────────────────────────── */
.chip-decoration {
  display: inline-block;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #4ade80 0%, #22d3ee 50%, #06b6d4 100%);
  border: 1.5px solid #a7f3d0;
  border-radius: 8px;
  position: relative;
}

/* ── Responsive ──────────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .topics__grid  { grid-template-columns: repeat(2, 1fr); }
  .videos__grid  { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --section-gap: 3rem; }

  .navbar__nav,
  .btn-subscribe {
    display: none;
  }

  .navbar__nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem;
    gap: 1.25rem;
  }

  .navbar__nav.open ~ .btn-subscribe {
    display: block;
  }

  .navbar__toggle { display: block; }

  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__description { max-width: 100%; }
  .hero__actions { justify-content: center; }
  .hero__visual { display: none; }

  .stats__grid { gap: 2rem; }

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

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

  .footer__inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
}

@media (max-width: 480px) {
  .topics__grid { grid-template-columns: 1fr; }
  .stats__grid  { flex-direction: column; gap: 1.5rem; }
}