/* ============================================================
   ArcoNet homepage styles
   Every color, font, spacing, radius, and shadow value traces
   to css/tokens.css. Structural px values (paddings, gaps,
   decor sizes) are taken verbatim from the approved design
   file `ArcoNet Homepage.dc.html`.
   ============================================================ */

/* ---------- Base ---------- */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--dark-bg);
  font-family: var(--font-body);
  color: var(--dark-text);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--dark-link);
  text-decoration: none;
  transition: color 150ms ease, background 150ms ease, border-color 150ms ease;
}
a:hover {
  color: var(--blue-200);
}

summary {
  list-style: none;
  cursor: pointer;
}
summary::-webkit-details-marker {
  display: none;
}

/* Opaque offset outline: 5.7:1 on the ground (WCAG 1.4.11), cannot be
   overridden by component box-shadows, survives forced-colors mode. */
:focus-visible {
  outline: 2px solid var(--dark-accent);
  outline-offset: 2px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

/* ---------- Shared layout ---------- */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 48px);
}

.section {
  padding: var(--section-pad) 0;
  border-bottom: var(--hairline);
}

.bg-ground {
  background: var(--dark-bg);
}
.bg-surface {
  background: var(--dark-surface);
}

/* Eyebrow pattern: Nº00X in accent + label in muted */
.eyebrow-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.eyebrow {
  font: var(--w-semibold) var(--text-eyebrow) var(--font-body);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
}
.eyebrow--accent {
  color: var(--dark-accent);
}
.eyebrow--muted {
  color: var(--dark-text-muted);
}

.section-h2 {
  margin: 18px 0 0;
  font: var(--w-medium) var(--text-h1) / var(--leading-display) var(--font-display);
  letter-spacing: var(--track-display);
  color: var(--dark-text);
}

/* Diamond marker */
.diamond {
  flex: none;
  background: var(--dark-accent);
  transform: rotate(45deg);
}
.diamond--9 {
  width: 9px;
  height: 9px;
}
.diamond--8 {
  width: 8px;
  height: 8px;
}
.diamond--5 {
  width: 5px;
  height: 5px;
}

/* Buttons */
.btn {
  display: inline-block;
  font: var(--w-semibold) var(--text-body) var(--font-body);
  color: var(--btn-text);
  background: var(--btn-bg);
  padding: 14px 26px;
  border-radius: var(--r-sm);
}
.btn:hover {
  background: var(--blue-600);
  color: var(--btn-text);
}
.btn--nav {
  font-size: var(--text-sm);
  padding: 9px 18px;
}
.btn--hero {
  box-shadow: var(--shadow-dark-1);
}
/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--dark-bg);
  border-bottom: var(--hairline);
}
.hero__lines {
  position: absolute;
  inset: 0;
  background: linear-gradient(var(--blue-alpha-05) 1px, transparent 1px);
  background-size: 100% 64px;
}
.hero__square {
  position: absolute;
  transform: rotate(45deg);
}
.hero__square--lg {
  right: -140px;
  top: 120px;
  width: 380px;
  height: 380px;
  border: 1px solid var(--blue-alpha-15);
}
.hero__square--sm {
  right: -40px;
  top: 220px;
  width: 180px;
  height: 180px;
  border: 1px solid var(--blue-alpha-25);
}
.hero__inner {
  position: relative;
}

/* Nav */
.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 16px;
  padding: 22px 0;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--dark-text);
}
.nav__brand:hover {
  color: var(--dark-text);
}
.nav__wordmark {
  font: var(--w-semibold) 22px var(--font-display);
  color: var(--dark-text);
}
.nav__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px clamp(14px, 3vw, 28px);
}
.nav__link {
  font: var(--w-medium) var(--text-sm) var(--font-body);
  color: var(--dark-text-muted);
}
.nav__link:hover {
  color: var(--dark-text);
}

/* Statement */
.hero__statement {
  padding: clamp(72px, 12vw, 150px) 0 clamp(80px, 12vw, 150px);
  max-width: 820px;
}
.hero__title {
  margin: 20px 0 0;
  font: var(--w-medium) var(--text-hero) / var(--leading-display) var(--font-display);
  letter-spacing: var(--track-display);
  color: var(--dark-text);
}
.hero__title-accent {
  color: var(--dark-accent);
}
.hero__sub {
  margin: 24px 0 0;
  max-width: 480px;
  font: var(--w-regular) var(--text-lg) / var(--leading-body) var(--font-body);
  color: var(--dark-text-muted);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-top: 36px;
}
.hero__ghost {
  font: var(--w-semibold) var(--text-sm) var(--font-body);
  color: var(--dark-text-muted);
}
.hero__ghost:hover {
  color: var(--dark-text);
}
.hero__trust {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 56px;
  font: var(--w-medium) var(--text-caption) var(--font-body);
  color: var(--dark-text-muted);
}

/* ---------- Nº002 What we do ---------- */
.what__h2 {
  max-width: 640px;
}
.what__intro {
  margin: 20px 0 0;
  max-width: 560px;
  font: var(--w-regular) var(--text-body) / var(--leading-body) var(--font-body);
  color: var(--dark-text-muted);
}
.what__rows {
  margin-top: 56px;
  border-top: var(--hairline);
}
.what__row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0 48px;
  border-bottom: var(--hairline);
  padding: 28px 0;
}
.what__row-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.what__num {
  font: var(--w-regular) 15px ui-monospace, Menlo, monospace;
  color: var(--dark-accent);
}
.what__row-title {
  font: var(--w-medium) var(--text-h3) var(--font-display);
  color: var(--dark-text);
}
.what__row-desc {
  margin: 8px 0 0;
  font: var(--w-regular) var(--text-sm) / var(--leading-body) var(--font-body);
  color: var(--dark-text-muted);
}

/* ---------- Nº003 Why us ---------- */
.why__h2 {
  max-width: 680px;
}
.why__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  margin-top: 56px;
}
.why__card {
  background: var(--dark-raised);
  border: var(--hairline);
  border-radius: var(--r-md);
  padding: 28px 28px 26px;
  transition: border-color 150ms ease;
}
.why__card:hover {
  border-color: var(--blue-alpha-25);
}
.why__card-title {
  margin-top: 18px;
  font: var(--w-medium) var(--text-h3) var(--font-display);
  color: var(--dark-text);
}
.why__card-desc {
  margin: 10px 0 0;
  font: var(--w-regular) var(--text-sm) / var(--leading-body) var(--font-body);
  color: var(--dark-text-muted);
}

/* ---------- Nº004 How it works ---------- */
.how__h2 {
  max-width: 640px;
}
.how__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  margin-top: 56px;
}
.how__step {
  border-top: 2px solid var(--n-700);
  padding-top: 22px;
}
.how__step--first {
  border-top-color: var(--dark-accent);
}
.how__numeral {
  font: var(--w-regular) 40px / 1 var(--font-display);
  color: var(--dark-text-muted);
}
.how__step--first .how__numeral {
  color: var(--dark-accent);
}
.how__step-title {
  margin-top: 14px;
  font: var(--w-medium) var(--text-h3) var(--font-display);
  color: var(--dark-text);
}
.how__step-desc {
  margin: 10px 0 0;
  font: var(--w-regular) var(--text-sm) / var(--leading-body) var(--font-body);
  color: var(--dark-text-muted);
}

/* ---------- Nº005 What's coming ---------- */
.coming__inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.coming__inner .eyebrow-row {
  justify-content: center;
}
.coming__body {
  margin: 20px auto 0;
  max-width: 540px;
  font: var(--w-regular) var(--text-body) / var(--leading-body) var(--font-body);
  color: var(--dark-text-muted);
}
.coming__chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  border: var(--hairline);
  border-radius: var(--r-pill);
  padding: 8px 16px;
}
.coming__dot {
  width: 6px;
  height: 6px;
  background: var(--success-on-dark);
  border-radius: 50%;
}
.coming__status {
  font: var(--w-medium) var(--text-caption) var(--font-body);
  color: var(--dark-text-muted);
}

/* ---------- Nº006 FAQ ---------- */
.faq .container {
  max-width: 820px;
}
.faq__h2 {
  margin: 18px 0 40px;
}
.faq__list {
  border-top: var(--hairline);
}
.faq__item {
  border-bottom: var(--hairline);
}
.faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
}
.faq__q-text {
  font: var(--w-medium) var(--text-lg) var(--font-body);
  color: var(--dark-text);
}
.faq__a {
  margin: 0;
  padding: 0 0 22px;
  max-width: 640px;
  font: var(--w-regular) var(--text-body) / var(--leading-body) var(--font-body);
  color: var(--dark-text-muted);
}

/* ---------- Footer ---------- */
.footer {
  position: relative;
  overflow: hidden;
  background: var(--dark-bg);
}
.footer__watermark {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -40px;
  font: var(--w-semibold) clamp(120px, 18vw, 220px) / 1 var(--font-display);
  letter-spacing: var(--track-display);
  color: var(--blue-alpha-05);
  white-space: nowrap;
  pointer-events: none;
}
.footer__inner {
  position: relative;
  max-width: 1120px;
  margin: 0 auto;
  padding: 72px clamp(20px, 5vw, 48px) 40px;
}
.footer__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 40px;
}
.footer__brand-row {
  display: flex;
  align-items: center;
  gap: 9px;
}
.footer__wordmark {
  font: var(--w-semibold) 24px var(--font-display);
  color: var(--dark-text);
}
.footer__tagline {
  margin: 14px 0 0;
  max-width: 300px;
  font: var(--w-regular) var(--text-sm) / var(--leading-body) var(--font-body);
  color: var(--dark-text-muted);
}
.footer__cols {
  display: flex;
  flex-wrap: wrap;
  gap: 56px;
}
.footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__link {
  font: var(--w-regular) var(--text-sm) var(--font-body);
  color: var(--dark-text);
}
.footer__link:hover {
  color: var(--dark-link);
}
.footer__muted {
  font: var(--w-regular) var(--text-sm) var(--font-body);
  color: var(--dark-text-muted);
}
.footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: 64px;
  padding-top: 24px;
  border-top: var(--hairline);
}
.footer__legal-item {
  font: var(--w-regular) var(--text-caption) var(--font-body);
  color: var(--dark-text-muted);
}