/**
 * @file layout.css
 * Header, navegación, Hero, botones y Footer con metodología BEM
 */

/* =========================================
   CONTAINER & UTILITIES
   ========================================= */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section {
  position: relative;
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-4xl);
}

.section__header {
  margin-bottom: var(--space-3xl);
}

.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-heading);
  font-size: var(--text-2xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-cyan);
  margin-bottom: var(--space-sm);
}

.section__eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-cyan);
  box-shadow: 0 0 10px var(--color-cyan);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 0.4; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1.15); box-shadow: 0 0 14px var(--color-cyan); }
}

.section__title {
  font-size: var(--text-4xl);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
  max-width: 25ch;
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 55ch;
}

/* =========================================
   BUTTONS (BEM)
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn--primary {
  background: var(--gradient-tech);
  color: var(--color-dark);
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.25);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 229, 255, 0.4);
  filter: brightness(1.08);
}

.btn--secondary {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-subtle);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
}

.btn--secondary:hover {
  background: var(--color-border-subtle);
  border-color: var(--color-blue);
  color: var(--color-blue);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--color-cyan);
  border: 1px solid var(--color-cyan);
}

.btn--outline:hover {
  background: rgba(0, 229, 255, 0.1);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
}

.btn--glow {
  position: relative;
}

.btn--glow::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: var(--gradient-intel);
  border-radius: inherit;
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn--glow:hover::before {
  opacity: 1;
}

/* =========================================
   HEADER & NAVIGATION (BEM)
   ========================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  transition: background-color var(--transition-base), backdrop-filter var(--transition-base), border-color var(--transition-base), padding var(--transition-base);
  padding: var(--space-lg) 0;
  border-bottom: 1px solid transparent;
}

.header--scrolled {
  background-color: var(--color-header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-header-border);
  padding: var(--space-sm) 0;
  box-shadow: var(--shadow-header);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  z-index: calc(var(--z-header) + 10);
}

.header__logo-img {
  height: 38px;
  width: auto;
  object-fit: contain;
}

.header__nav {
  display: flex;
  align-items: center;
}

.header__list {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.header__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: var(--space-xs) 0;
}

.header__nav-cta {
  display: none;
}

.header__link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-tech);
  transition: width var(--transition-fast);
}

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

.header__link:hover::after {
  width: 100%;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* =========================================
   THEME SWITCHER (BEM)
   ========================================= */
.theme-switch {
  display: inline-flex;
  align-items: center;
  background: var(--color-border-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.theme-switch__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.theme-switch__btn:hover {
  color: var(--color-text-primary);
  background: rgba(0, 102, 255, 0.08);
}

.theme-switch__btn--active {
  color: var(--color-blue);
  background: var(--color-bg-surface);
  box-shadow: var(--shadow-sm);
}

.theme-switch__icon {
  width: 16px;
  height: 16px;
  pointer-events: none;
}

.header__burger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  cursor: pointer;
  z-index: calc(var(--z-header) + 10);
}

.header__burger-line {
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(2) {
  opacity: 0;
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* =========================================
   HERO SECTION (BEM)
   ========================================= */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: calc(var(--space-4xl) + 2rem);
  padding-bottom: var(--space-4xl);
}

.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: var(--z-bg);
}

.hero__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(1.1) brightness(0.85);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 1;
}

.hero__overlay-grid {
  position: absolute;
  inset: 0;
  background-size: 50px 50px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  mask-image: radial-gradient(circle at 50% 50%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, black 30%, transparent 80%);
  z-index: 2;
}

.hero__container {
  position: relative;
  z-index: var(--z-content);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 980px;
}

.hero__signal-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.35rem 1rem;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-cyan);
  letter-spacing: 0.12em;
  margin-bottom: var(--space-xl);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
}

.hero__signal-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-cyan);
  box-shadow: 0 0 8px var(--color-cyan);
  animation: pulse-dot 1.8s infinite ease-in-out;
}

.hero__title {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-text-primary);
  line-height: 1.08;
  margin-bottom: var(--space-lg);
  text-wrap: balance;
}

.hero__title-gradient {
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline;
}

.hero__claim {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-blue);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
}

.hero__description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 65ch;
  margin-bottom: var(--space-2xl);
  text-wrap: pretty;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  z-index: var(--z-content);
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.hero__scroll:hover {
  color: var(--color-blue);
  transform: translateX(-50%) translateY(2px);
}

.hero__scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-full);
  position: relative;
  background: var(--color-bg-glass);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.hero__scroll:hover .hero__scroll-mouse {
  border-color: var(--color-blue);
  box-shadow: 0 0 12px rgba(0, 102, 255, 0.25);
}

.hero__scroll-wheel {
  width: 4px;
  height: 8px;
  background-color: var(--color-cyan);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-wheel 2s infinite cubic-bezier(0.65, 0, 0.35, 1);
}

@keyframes scroll-wheel {
  0% { transform: translate(-50%, 0); opacity: 1; }
  80% { transform: translate(-50%, 14px); opacity: 0; }
  100% { transform: translate(-50%, 0); opacity: 0; }
}

/* =========================================
   FOOTER (BEM)
   ========================================= */
.footer {
  background-color: var(--color-footer-bg);
  border-top: 1px solid var(--color-footer-border);
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-md);
}

.footer__logo-link {
  display: inline-flex;
  align-items: center;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.footer__logo-link:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.footer__logo-img {
  width: 220px;
  height: auto;
  display: block;
  object-fit: contain;
  object-position: left center;
  filter: drop-shadow(0 4px 14px rgba(0, 0, 0, 0.5));
}

.footer__claim {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-cyan-glow);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.footer__text {
  font-size: var(--text-sm);
  color: var(--color-footer-muted);
  line-height: 1.6;
  max-width: 38ch;
}

.footer__col-title {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-footer-text);
  margin-bottom: var(--space-lg);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-footer-muted);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

.footer__link:hover {
  color: var(--color-cyan-glow);
  transform: translateX(4px);
}

.footer__contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-footer-muted);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-footer-border);
  font-size: var(--text-xs);
  color: var(--color-footer-muted);
}

.footer__tagline {
  font-family: var(--font-mono);
  color: var(--color-footer-muted);
}

/* =========================================
   RESPONSIVE DESIGN
   ========================================= */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  .header__nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 400px;
    height: 100vh;
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--color-border-subtle);
    flex-direction: column;
    justify-content: center;
    padding: var(--space-3xl) var(--space-xl);
    transition: right var(--transition-base);
    z-index: var(--z-header);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.2);
  }

  .header__nav--open {
    right: 0;
  }

  .header__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-lg);
    width: 100%;
  }

  .header__link {
    font-size: var(--text-xl);
  }

  .header__burger {
    display: flex;
  }

  .header__actions .btn {
    display: none;
  }

  .header__nav-cta {
    display: inline-flex;
    margin-top: var(--space-xl);
    width: 100%;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}