/* Onyx × Nexo landing — field → system */
:root {
  --petroleo: #0b3a4a;
  --grafito: #1a1f24;
  --acero: #5a6a72;
  --teal: #3a7a8c;
  --niebla: #f5f6f7;
  --hielo: #e8ecee;
  --blanco: #ffffff;
  --alerta: #c45c26;
  --font-display: "Sora", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --space: clamp(1rem, 3vw, 2rem);
  --max: 68rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--hielo);
  background: var(--grafito);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 99;
  background: var(--blanco);
  color: var(--grafito);
  padding: 0.5rem 1rem;
}

/* —— Nav —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem var(--space);
  background: color-mix(in srgb, var(--grafito) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--hielo) 12%, transparent);
}

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

.brand-lockup img {
  height: 2rem;
  width: auto;
}

.brand-lockup span {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--acero);
}

.header-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.65rem 1rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
}

.header-nav a {
  text-decoration: none;
  color: color-mix(in srgb, var(--hielo) 78%, var(--acero));
}

.header-nav a:hover,
.header-nav a:focus-visible,
.header-nav a[aria-current="page"] {
  color: var(--hielo);
}

.header-cta {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.55rem 1rem;
  background: var(--teal);
  color: var(--blanco);
  border-radius: 2px;
}

.header-cta:hover,
.header-cta:focus-visible {
  background: color-mix(in srgb, var(--teal) 80%, var(--blanco));
  outline: 2px solid var(--hielo);
  outline-offset: 2px;
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: min(92vh, 52rem);
  display: grid;
  align-items: end;
  padding: clamp(3rem, 10vh, 6rem) var(--space) clamp(2.5rem, 6vh, 4rem);
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 55% at 70% 20%, color-mix(in srgb, var(--teal) 28%, transparent), transparent 55%),
    linear-gradient(165deg, var(--petroleo) 0%, var(--grafito) 55%, #0d1216 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -12deg,
    transparent,
    transparent 14px,
    color-mix(in srgb, var(--hielo) 3.5%, transparent) 14px,
    color-mix(in srgb, var(--hielo) 3.5%, transparent) 15px
  );
  pointer-events: none;
  opacity: 0.7;
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(100%, var(--max));
  margin: 0 auto;
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
}

@media (min-width: 860px) {
  .hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: end;
  }
}

.hero-copy .eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.35rem, 6.5vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
  max-width: 14ch;
}

.hero h1 em {
  font-style: normal;
  color: color-mix(in srgb, var(--hielo) 70%, var(--teal));
}

.hero-lead {
  margin: 0 0 1.75rem;
  max-width: 36ch;
  color: color-mix(in srgb, var(--hielo) 78%, var(--acero));
  font-size: 1.1rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 0.85rem 1.25rem;
  border-radius: 2px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-primary {
  background: var(--alerta);
  color: var(--blanco);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  filter: brightness(1.08);
  outline: 2px solid var(--hielo);
  outline-offset: 2px;
}

.btn-ghost {
  border-color: color-mix(in srgb, var(--hielo) 35%, transparent);
  color: var(--hielo);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--hielo);
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.hero-note {
  margin: 1rem 0 0;
  font-size: 0.85rem;
  color: var(--acero);
}

/* Canal demo */
.canal-stage {
  background: color-mix(in srgb, var(--petroleo) 55%, #000);
  border: 1px solid color-mix(in srgb, var(--hielo) 14%, transparent);
  border-radius: 4px;
  padding: 1.25rem 1.1rem 1.1rem;
  box-shadow: 0 24px 48px color-mix(in srgb, #000 35%, transparent);
}

.canal-stage h2 {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--acero);
  margin: 0 0 1rem;
  font-weight: 500;
}

.canal-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.65rem;
  align-items: center;
  margin-bottom: 1rem;
}

.canal-node {
  background: color-mix(in srgb, var(--grafito) 70%, var(--petroleo));
  border: 1px solid color-mix(in srgb, var(--hielo) 12%, transparent);
  border-radius: 3px;
  padding: 0.85rem 0.75rem;
  min-height: 4.5rem;
}

.canal-node strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  margin-bottom: 0.25rem;
}

.canal-node span {
  font-size: 0.78rem;
  color: var(--acero);
}

.canal-node.is-dest {
  border-color: color-mix(in srgb, var(--teal) 55%, transparent);
}

.canal-pipe {
  width: 2.5rem;
  height: 0.35rem;
  background: var(--hielo);
  position: relative;
  overflow: hidden;
  border-radius: 1px;
}

.canal-pipe::after {
  content: "";
  position: absolute;
  inset: 0;
  width: 40%;
  background: var(--teal);
  animation: pulse-send 2.4s ease-in-out infinite;
}

@keyframes pulse-send {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(280%);
  }
}

.canal-log {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  line-height: 1.45;
  color: color-mix(in srgb, var(--hielo) 75%, var(--teal));
  background: #0a0e11;
  border-radius: 2px;
  padding: 0.75rem;
  min-height: 5.5rem;
  margin: 0;
  white-space: pre-wrap;
}

.canal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.canal-actions button {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid color-mix(in srgb, var(--hielo) 25%, transparent);
  background: transparent;
  color: var(--hielo);
  padding: 0.45rem 0.7rem;
  border-radius: 2px;
  cursor: pointer;
}

.canal-actions button:hover,
.canal-actions button:focus-visible {
  border-color: var(--teal);
  color: var(--blanco);
  outline: 2px solid var(--teal);
  outline-offset: 1px;
}

@media (prefers-reduced-motion: reduce) {
  .canal-pipe::after {
    animation: none;
    transform: none;
    width: 100%;
    opacity: 0.5;
  }

  html {
    scroll-behavior: auto;
  }
}

/* —— Sections —— */
.section {
  padding: clamp(3rem, 8vh, 5.5rem) var(--space);
}

.section-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.15rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
  max-width: 22ch;
}

.section .lede {
  margin: 0 0 2rem;
  color: var(--acero);
  max-width: 42ch;
  font-size: 1.05rem;
}

.section-light {
  background: var(--niebla);
  color: var(--grafito);
}

.section-light .lede {
  color: var(--acero);
}

.section-petroleo {
  background: var(--petroleo);
}

.problem-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .problem-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

.problem-list li {
  padding: 1.1rem 1rem;
  border-left: 3px solid var(--teal);
  background: color-mix(in srgb, var(--blanco) 6%, transparent);
}

.section-light .problem-list li {
  background: var(--blanco);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--grafito) 8%, transparent);
}

.problem-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

.problem-list span {
  font-size: 0.95rem;
  color: var(--acero);
}

.flow-steps {
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .flow-steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.flow-step {
  padding: 1.25rem 1rem;
  border-top: 2px solid var(--teal);
}

.flow-step .label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 0.5rem;
}

.flow-step h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
  font-weight: 600;
}

.flow-step p {
  margin: 0;
  color: color-mix(in srgb, var(--hielo) 70%, var(--acero));
  font-size: 0.95rem;
}

.uses {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.uses li {
  font-family: var(--font-display);
  font-size: 0.85rem;
  padding: 0.45rem 0.75rem;
  background: var(--blanco);
  border: 1px solid color-mix(in srgb, var(--grafito) 12%, transparent);
  color: var(--grafito);
}

.sector-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .sector-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .sector-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.sector-card {
  background: var(--blanco);
  padding: 1.15rem 1rem 1.25rem;
  border-top: 3px solid var(--teal);
}

.sector-tag {
  font-family: var(--font-display);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 0.45rem;
  font-weight: 600;
}

.sector-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 0 0 0.45rem;
  font-weight: 600;
  color: var(--grafito);
}

.sector-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--acero);
}

.sector-foot {
  margin: 1.25rem 0 0;
  font-size: 0.9rem;
  color: var(--acero);
}

.feat-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 800px) {
  .feat-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feat-heading {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 0.75rem;
  font-weight: 600;
}

.feat-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.feat-list li {
  position: relative;
  padding: 0.4rem 0 0.4rem 1rem;
  font-size: 0.92rem;
  color: color-mix(in srgb, var(--hielo) 82%, var(--acero));
  border-bottom: 1px solid color-mix(in srgb, var(--hielo) 10%, transparent);
}

.feat-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 0.35rem;
  height: 0.35rem;
  background: var(--teal);
}

.brand-line {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid color-mix(in srgb, var(--grafito) 12%, transparent);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.brand-line p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--acero);
  max-width: 36ch;
}

/* Contact */
.contact-box {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .contact-box {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }
}

.contact-box a.big-wa {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  background: var(--alerta);
  color: var(--blanco);
  padding: 1rem 1.25rem;
  border-radius: 2px;
  text-align: center;
}

.contact-meta {
  margin: 0;
  font-size: 0.95rem;
  color: color-mix(in srgb, var(--hielo) 75%, var(--acero));
}

.contact-meta a {
  color: var(--hielo);
  text-underline-offset: 3px;
}

/* Footer */
.site-footer {
  padding: 1.5rem var(--space) 2.5rem;
  border-top: 1px solid color-mix(in srgb, var(--hielo) 10%, transparent);
  font-size: 0.8rem;
  color: var(--acero);
}

.site-footer .section-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.site-footer strong {
  color: var(--hielo);
  font-family: var(--font-display);
  font-weight: 600;
}