/* ============================================================
   PARADIGM BIO METAL — Layout
   Second Pass: Premium navbar, refined grid, enhanced footer
   ============================================================ */

/* ── Container ─────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--section-px);
  padding-right: var(--section-px);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.container--wide {
  max-width: var(--max-width-wide);
}

/* ── Section ───────────────────────────────────────────────── */
.section {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
  position: relative;
  overflow: hidden;
}

.section--dark {
  background-color: var(--clr-bg-secondary);
}

.section--darker {
  background-color: var(--clr-bg-primary);
}

.section--surface {
  background-color: var(--clr-bg-tertiary);
}

/* ── Navbar ─────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  z-index: var(--z-navbar);
  transition: all var(--duration-normal) var(--ease-out);
}

/* Subtle top accent line */
.navbar::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(30, 136, 229, 0.15), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.navbar.scrolled {
  /* Fondo degradado premium: claro a la izquierda (donde va el logo), oscuro a la derecha */
  background: linear-gradient(90deg, rgba(30, 136, 229, 0.95) 0%, rgba(12, 61, 143, 0.90) 30%, rgba(6, 10, 16, 0.92) 100%);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 1px 0 rgba(130, 155, 190, 0.06),
              0 8px 32px rgba(0, 0, 0, 0.6);
}

.navbar.scrolled::after {
  opacity: 1;
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--section-px);
}

/* ── Navbar Logo — FIXED: no white rectangle ───────────────── */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  height: 100%;
  position: relative; 
}

.navbar__logo::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 45px;
  height: 45px;
  z-index: 0;
  pointer-events: none;
}

.navbar__logo-video {
  height: 45px;
  width: auto;
  object-fit: contain;
  mix-blend-mode: screen;
  position: relative;
}

.navbar__logo-img {
  height: 35px;
  width: auto;
  object-fit: contain;
  position: relative;
  z-index: 1;
  filter: brightness(0) invert(1); 
}

.navbar__logo-img {
  height: 60px;
  width: auto;
  object-fit: contain;
}

@media (max-width: 768px) {
  .navbar__logo-video {
    height: 35px; 
  }
  .navbar__logo-img {
    height: 25px;
  }
}

.navbar__logo:hover .navbar__logo-img {
  transform: scale(1.06);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.5));
}

/* ── Navbar Menu ───────────────────────────────────────────── */
.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.navbar__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--clr-text-secondary);
  text-decoration: none;
  letter-spacing: var(--ls-wide);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--clr-white);
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: calc(100% - var(--space-xl));
  height: 2px;
  background: linear-gradient(90deg, var(--clr-blue-400), var(--clr-blue-600));
  border-radius: var(--radius-full);
  transition: transform var(--duration-normal) var(--ease-out);
}

.navbar__link:hover::after,
.navbar__link.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* ── Navbar CTA ────────────────────────────────────────────── */
.navbar__cta {
  margin-left: var(--space-md);
}

/* ── Mobile Hamburger ──────────────────────────────────────── */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  cursor: pointer;
  z-index: calc(var(--z-navbar) + 10);
  background: none;
  border: none;
  padding: 0;
}

.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-white);
  border-radius: var(--radius-full);
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
}

.navbar__hamburger span:nth-child(1) {
  margin-bottom: 6px;
}

.navbar__hamburger span:nth-child(3) {
  margin-top: 6px;
}

/* Hamburger active state */
.navbar__hamburger.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.navbar__hamburger.active span:nth-child(2) {
  opacity: 0;
}

.navbar__hamburger.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ── Mobile Overlay ────────────────────────────────────────── */
.navbar__overlay {
  display: none;
}

/* ── Grid Utilities ────────────────────────────────────────── */
.grid {
  display: grid;
  gap: var(--space-xl);
}

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

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

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid--auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ── Flex Utilities ────────────────────────────────────────── */
.flex {
  display: flex;
}

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

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

.flex--col {
  display: flex;
  flex-direction: column;
}

.flex--gap-sm {
  gap: var(--space-sm);
}

.flex--gap-md {
  gap: var(--space-md);
}

.flex--gap-lg {
  gap: var(--space-lg);
}

.flex--gap-xl {
  gap: var(--space-xl);
}

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  background: var(--clr-navy-deep);
  border-top: 1px solid var(--clr-border);
  padding: var(--space-4xl) 0 var(--space-xl);
  position: relative;
}

/* Subtle glow at footer top */
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(30, 136, 229, 0.3), transparent);
}

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

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

/* Footer logo — same fix: eliminate white bg */
.footer__logo {
  height: 44px;
  width: auto;
  filter: brightness(1.1) contrast(1.1);
  mix-blend-mode: lighten;
  opacity: 0.9;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.footer__logo:hover {
  opacity: 1;
}

.footer__desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: var(--lh-relaxed);
  max-width: 32ch;
}

.footer__heading {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-text-primary);
  margin-bottom: var(--space-lg);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  transition: color var(--duration-fast) var(--ease-out),
              padding-left var(--duration-fast) var(--ease-out);
}

.footer__link:hover {
  color: var(--clr-blue-400);
  padding-left: 6px;
}

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  margin-bottom: var(--space-sm);
}

.footer__contact-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 3px;
  fill: var(--clr-blue-400);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--clr-border);
}

.footer__copy {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
}

.footer__legal {
  display: flex;
  gap: var(--space-lg);
}

.footer__legal a {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
}

.footer__legal a:hover {
  color: var(--clr-blue-400);
}

/* ── WhatsApp Floating Button ──────────────────────────────── */
.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: var(--z-whatsapp);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: #25D366;
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  transition: transform var(--duration-normal) var(--ease-spring),
              box-shadow var(--duration-normal) var(--ease-out);
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(37, 211, 102, 0.5);
}

.whatsapp-float svg {
  width: 32px;
  height: 32px;
  fill: #fff;
}

.whatsapp-float__pulse {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: rgba(37, 211, 102, 0.3);
  animation: whatsappPulse 2s ease-in-out infinite;
}

@keyframes whatsappPulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.4); opacity: 0; }
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .navbar__hamburger {
    display: flex;
  }

  .navbar__menu {
    position: fixed;
    top: 0;
    right: 0;
    width: min(380px, 85vw);
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: var(--space-3xl);
    background: rgba(6, 10, 16, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid var(--clr-border);
    transform: translateX(100%);
    transition: transform var(--duration-slow) var(--ease-out);
    gap: var(--space-xs);
    z-index: var(--z-navbar);
  }

  .navbar__menu.open {
    transform: translateX(0);
  }

  .navbar__link {
    font-size: var(--fs-lg);
    padding: var(--space-sm) 0;
  }

  .navbar__cta {
    margin-left: 0;
    margin-top: var(--space-lg);
    width: 100%;
  }

  .navbar__cta .btn {
    width: 100%;
    justify-content: center;
  }

  .navbar__overlay {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-normal) var(--ease-out),
                visibility var(--duration-normal) var(--ease-out);
    z-index: calc(var(--z-navbar) - 1);
  }

  .navbar__overlay.visible {
    opacity: 1;
    visibility: visible;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

  .grid--4 {
    grid-template-columns: 1fr;
  }

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

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

  .footer__legal {
    flex-wrap: wrap;
    justify-content: center;
  }
}