/* ==========================================================================
   HÉCTOR GRANELL — MINIMAL TECHNICAL DESIGN SYSTEM
   Editorial, riguroso, limpio y sin elementos decorativos superfluos.
   ========================================================================== */

:root {
  /* Fondos y Superficies */
  --bg-primary: #090d14;
  --bg-secondary: #0e1420;
  --bg-surface: #131b2a;
  --bg-surface-elevated: #182235;
  --bg-code: #06090f;
  --bg-glass: rgba(9, 13, 20, 0.9);

  /* Bordes */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-focus: #38bdf8;

  /* Textos */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;
  --text-inverse: #090d14;

  /* Acentos */
  --accent: #38bdf8;
  --accent-hover: #7dd3fc;
  --accent-subtle: rgba(56, 189, 248, 0.1);

  /* Tipografía */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, monospace;

  /* Radios */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transiciones */
  --transition: all 0.15s ease-out;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

button, input, select, textarea {
  font-family: inherit;
  color: inherit;
}

::selection {
  background-color: var(--accent-subtle);
  color: var(--accent-hover);
}

/* ==========================================================================
   Layout & Contenedores
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  max-width: 780px;
}

.section {
  padding-top: 4.5rem;
  padding-bottom: 4.5rem;
  position: relative;
}

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

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

@media (max-width: 860px) {
  .section {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

/* ==========================================================================
   Tipografía
   ========================================================================== */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  letter-spacing: -0.025em;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

h4 {
  font-size: 1.05rem;
  font-weight: 600;
}

p {
  margin-bottom: 1.25rem;
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

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

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

/* ==========================================================================
   Botones
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--text-primary);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background-color: #e2e8f0;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
  background-color: var(--bg-surface);
  border-color: var(--text-primary);
}

.btn-accent {
  background-color: var(--accent);
  color: #041019;
}

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

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.85rem 1.6rem;
  font-size: 1rem;
}

/* ==========================================================================
   Header Sticky
   ========================================================================== */
.header-sticky {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.logo-symbol {
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 700;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 34px;
  height: 34px;
  background: none;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 6px;
}

.btn-burger span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--text-primary);
}

@media (max-width: 900px) {
  .nav-menu, .nav-cta-desktop {
    display: none;
  }
  .btn-burger {
    display: flex;
  }
}

/* Drawer Móvil */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 320px;
  height: 100vh;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-medium);
  z-index: 200;
  transition: right 0.25s ease-out;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.mobile-drawer.open {
  right: 0;
}

.drawer-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 199;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.drawer-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.drawer-close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.drawer-link {
  padding: 0.65rem 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
}

.drawer-link:hover, .drawer-link.active {
  color: var(--accent);
}

/* ==========================================================================
   Cards & Superficies
   ========================================================================== */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: var(--transition);
}

.card:hover {
  border-color: var(--border-medium);
}

.card-interactive {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

/* Bloques de Código y Terminales Reales */
.code-block {
  background-color: var(--bg-code);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
  overflow-x: auto;
}

.code-block .comment {
  color: var(--text-dim);
}

.code-block .cmd-prefix {
  color: var(--accent);
  user-select: none;
  margin-right: 0.5rem;
}

.code-block .highlight {
  color: #7dd3fc;
}

.code-block .success {
  color: #34d399;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding-top: 5rem;
  padding-bottom: 4rem;
}

.hero-title {
  margin-bottom: 1.25rem;
}

.hero-desc {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 720px;
  margin-bottom: 2rem;
}

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

/* ==========================================================================
   Listas de Características / Procesos
   ========================================================================== */
.simple-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.simple-list li {
  position: relative;
  padding-left: 1.25rem;
}

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

.process-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.process-item {
  padding: 1.5rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.process-item h4 {
  margin-bottom: 0.5rem;
}

.process-item p {
  font-size: 0.925rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ==========================================================================
   Filtros del Laboratorio
   ========================================================================== */
.filter-tabs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  border-color: var(--border-medium);
  color: var(--text-primary);
}

.filter-btn.active {
  background-color: var(--accent-subtle);
  border-color: var(--accent);
  color: var(--accent-hover);
  font-weight: 600;
}

.tech-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Acordeones
   ========================================================================== */
.accordion-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.accordion-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.15rem 1.25rem;
  background: none;
  border: none;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
}

.accordion-icon {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
  color: var(--accent);
}

.accordion-content {
  display: none;
  padding: 0 1.25rem 1.25rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.7;
}

.accordion-item.open .accordion-content {
  display: block;
}

/* ==========================================================================
   Formularios
   ========================================================================== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: var(--transition);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--border-focus);
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--text-dim);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  pointer-events: none;
}

.form-feedback {
  display: none;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-top: 1rem;
}

.form-feedback.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding-top: 3.5rem;
  padding-bottom: 3rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.75rem;
  max-width: 320px;
}

.footer-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 500px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}