:root {
  --ink: #1a1c1e;
  --ink-soft: #3a3f45;
  --muted: #5c646c;
  --line: #e4ddd3;
  --paper: #f7f3ec;
  --paper-2: #efe9df;
  --white: #fffcf7;
  --gold: #c9a227;
  --gold-deep: #a8841a;
  --green: #1f5c45;
  --blue: #2f6fed;
  --whatsapp: #128c7e;
  --whatsapp-hover: #0e7368;
  --radius: 12px;
  --shadow: 0 18px 50px rgba(26, 28, 30, 0.08);
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Figtree", system-ui, sans-serif;
  --space: clamp(1rem, 3vw, 2rem);
  --max: 1120px;
  --header-h: 4.25rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 0.75rem);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 90% -10%, rgba(47, 111, 237, 0.07), transparent 55%),
    radial-gradient(900px 500px at -10% 20%, rgba(201, 162, 39, 0.08), transparent 50%),
    linear-gradient(180deg, var(--paper) 0%, var(--white) 40%, var(--paper) 100%);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--blue);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--green);
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1000;
  background: var(--ink);
  color: var(--white);
  padding: 0.75rem 1rem;
  border-radius: 8px;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.container--narrow {
  width: min(100% - 2rem, 720px);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(247, 243, 236, 0.86);
  border-bottom: 1px solid rgba(228, 221, 211, 0.8);
}

.site-header__inner {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
}

.brand__mark {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 4px;
  background:
    linear-gradient(135deg, var(--gold) 0 35%, transparent 35%),
    linear-gradient(225deg, var(--green) 0 40%, transparent 40%),
    linear-gradient(45deg, var(--blue) 0 45%, var(--ink) 45%);
  box-shadow: inset 0 0 0 1px rgba(26, 28, 30, 0.15);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  cursor: pointer;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--ink);
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav {
  display: none;
  position: absolute;
  inset: var(--header-h) 0 auto;
  background: rgba(255, 252, 247, 0.98);
  border-bottom: 1px solid var(--line);
  padding: 1rem 1.25rem 1.25rem;
}

.nav.is-open {
  display: block;
}

.nav__list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.nav__list a {
  display: block;
  padding: 0.7rem 0.4rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
}

.nav__list a:hover {
  color: var(--green);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  color: inherit;
}

.btn--sm {
  min-height: 2.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
}

.btn--lg {
  min-height: 3.35rem;
  padding: 0.9rem 1.5rem;
  font-size: 1.05rem;
}

.btn--whatsapp {
  background: var(--whatsapp);
  color: #fff;
}

.btn--whatsapp:hover {
  background: var(--whatsapp-hover);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}

.btn--ghost:hover {
  background: var(--ink);
  color: var(--white);
}

.btn--text {
  background: transparent;
  color: var(--ink-soft);
  min-height: auto;
  padding: 0.5rem 0.25rem;
  border-radius: 0;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.btn--text:hover {
  color: var(--green);
  transform: none;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  min-height: calc(100svh - var(--header-h));
  display: flex;
  align-items: center;
  padding: clamp(2.5rem, 6vw, 5rem) 0;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(26, 28, 30, 0.03) 1px, transparent 1px) 0 0 / 28px 28px,
    radial-gradient(ellipse 70% 50% at 70% 40%, rgba(31, 92, 69, 0.06), transparent 60%);
  mask-image: linear-gradient(180deg, #000 55%, transparent);
  pointer-events: none;
}

.hero__grid {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
  position: relative;
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.hero__brand {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--ink);
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.85rem, 5.5vw, 3.35rem);
  letter-spacing: -0.035em;
  line-height: 1.08;
  max-width: 14ch;
}

.hero__lead {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  max-width: 38rem;
  font-size: 1.1rem;
}

.hero__tagline {
  margin: 0 0 1.75rem;
  color: var(--green);
  font-weight: 600;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
}

.hero__visual {
  justify-self: stretch;
}

.flow-diagram {
  width: 100%;
  height: auto;
  filter: drop-shadow(var(--shadow));
}

.flow-node rect {
  fill: rgba(255, 252, 247, 0.92);
  stroke: var(--line);
  stroke-width: 1.5;
}

.flow-node text {
  fill: var(--ink);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
}

.flow-node--accent rect {
  stroke: var(--blue);
  fill: rgba(47, 111, 237, 0.08);
}

.flow-node--gold rect {
  stroke: var(--gold-deep);
  fill: rgba(201, 162, 39, 0.12);
}

.flow-caption {
  fill: var(--muted);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.flow-diagram__path {
  stroke-dasharray: 8 6;
  animation: dash 18s linear infinite;
}

@keyframes dash {
  to { stroke-dashoffset: -200; }
}

/* Sections */
.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
}

.section--muted {
  background: rgba(239, 233, 223, 0.45);
  border-block: 1px solid rgba(228, 221, 211, 0.7);
}

.section__header {
  margin-bottom: clamp(2rem, 4vw, 3rem);
  max-width: 44rem;
}

.eyebrow {
  margin: 0 0 0.65rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.section__header h2,
.contact .section__header h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.5vw, 2.35rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.section__lead {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

/* Services — not heavy cards; hairline separators */
.service-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.service {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}

.service h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.service p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 42rem;
}

/* Timeline */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}

.timeline__item {
  position: relative;
  padding-left: 1.25rem;
  border-left: 2px solid var(--line);
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 0.35rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.2);
}

.timeline__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.35rem;
}

.timeline__org {
  font-weight: 700;
  color: var(--green);
}

.timeline__time {
  color: var(--muted);
  font-size: 0.95rem;
}

.timeline__item h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.timeline__item p {
  margin: 0;
  color: var(--ink-soft);
}

/* Cases */
.case {
  padding: 1.75rem 0 2rem;
  border-top: 1px solid var(--line);
}

.case:last-of-type {
  border-bottom: 1px solid var(--line);
}

.case__header h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: -0.03em;
}

.case__context {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.case__grid {
  display: grid;
  gap: 1.25rem;
}

.case__grid h4 {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.case__grid p {
  margin: 0;
  color: var(--ink-soft);
}

.case__stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.25rem 0 0;
}

.case__stack span {
  display: inline-block;
  padding: 0.28rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  background: rgba(255, 252, 247, 0.7);
}

.case__cta {
  margin: 1.25rem 0 0;
}

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.steps__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.steps__num {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--blue);
  font-size: 1.15rem;
}

.steps__item h3 {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.steps__item p {
  margin: 0;
  color: var(--ink-soft);
}

/* Audience */
.audience {
  display: grid;
  gap: 1.25rem;
}

.audience__item {
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}

.audience__item:last-child {
  border-bottom: 1px solid var(--line);
}

.audience__item--primary {
  padding-top: 0;
  border-top: 0;
}

.audience__item--primary h3 {
  color: var(--green);
}

.audience__item h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.audience__item p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 40rem;
}

/* Philosophy */
.philosophy {
  padding: clamp(4rem, 10vw, 7rem) 0;
  background:
    linear-gradient(160deg, #1a1c1e 0%, #243029 55%, #1a2438 100%);
  color: var(--white);
}

.philosophy blockquote {
  margin: 0 0 2rem;
  max-width: 18ch;
}

.philosophy blockquote p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.25rem);
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.philosophy__values {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.philosophy__values li {
  padding: 0.4rem 0.8rem;
  border: 1px solid rgba(255, 252, 247, 0.22);
  border-radius: 999px;
  font-size: 0.92rem;
  color: rgba(255, 252, 247, 0.88);
}

/* Tech */
.tech-groups {
  display: grid;
  gap: 1.5rem;
}

.tech-group h3 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--green);
}

.tech-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tech-group li {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  font-size: 0.92rem;
  color: var(--ink-soft);
}

/* FAQ */
.faq {
  display: grid;
  gap: 0.65rem;
}

.faq__item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 0 1rem;
}

.faq__item summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 0;
  font-weight: 600;
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

.faq__item summary::-webkit-details-marker {
  display: none;
}

.faq__item summary::after {
  content: "+";
  float: right;
  color: var(--muted);
  font-weight: 400;
}

.faq__item[open] summary::after {
  content: "–";
}

.faq__item p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

/* Contact */
.contact {
  text-align: left;
}

.contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.contact__note {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.contact__email a {
  color: var(--ink-soft);
  font-weight: 500;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 3rem;
  background: rgba(239, 233, 223, 0.55);
}

.site-footer__inner {
  display: grid;
  gap: 1.5rem;
}

.brand--footer {
  margin: 0 0 0.35rem;
}

.site-footer__tagline {
  margin: 0;
  color: var(--ink-soft);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.site-footer__links a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
}

.site-footer__links a:hover {
  color: var(--green);
}

.site-footer__muted {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer__copy {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .flow-diagram__path { animation: none; }
  .btn:hover { transform: none; }
}

/* Tablet+ */
@media (min-width: 720px) {
  .service-list {
    grid-template-columns: 1fr 1fr;
    gap: 0 2.5rem;
    border-top: 0;
  }

  .service {
    border-top: 1px solid var(--line);
  }

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

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

  .audience {
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 1.75rem;
  }

  .audience__item,
  .audience__item:last-child {
    border: 0;
    padding: 0;
  }

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

  .site-footer__inner {
    grid-template-columns: 1.2fr 1fr;
    align-items: start;
  }

  .site-footer__copy {
    grid-column: 1 / -1;
  }
}

/* Desktop */
@media (min-width: 960px) {
  .nav-toggle { display: none; }

  .nav {
    display: flex;
    position: static;
    inset: auto;
    background: transparent;
    border: 0;
    padding: 0;
    align-items: center;
    gap: 1.25rem;
  }

  .nav__list {
    display: flex;
    gap: 0.15rem;
    margin: 0;
  }

  .nav__list a {
    padding: 0.45rem 0.7rem;
    font-size: 0.95rem;
  }

  .nav__cta { width: auto; }

  .hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
  }

  .hero {
    padding-block: clamp(3rem, 7vh, 5.5rem);
  }

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

  .steps {
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
  }

  .steps__item {
    grid-template-columns: 1fr;
    border: 0;
    padding: 0;
  }
}