/* Theme tokens — light (default) and dark */
:root {
  --bg: var(--tdh-white);
  --bg-alt: var(--tdh-surface);
  --ink: var(--tdh-ink);
  --text: var(--tdh-slate);
  --muted: var(--tdh-gray);
  --faint: var(--tdh-gray-soft);
  --line: var(--tdh-line);
  --blue: var(--tdh-blue);
  --blue-deep: var(--tdh-blue-deep);
  --disc: var(--tdh-blue-pale);
  --purple: var(--tdh-purple);
  --logo-ink: var(--tdh-blue);
  --btn-ink: var(--tdh-ink);
  --chip-bg: transparent;
}

[data-theme="dark"] {
  --bg: #111827;
  --bg-alt: #0D1524;
  --ink: #FFFFFF;
  --text: #8A93A3;
  --muted: #8A93A3;
  --faint: #6B7280;
  --line: #1F2A3D;
  --blue: #3B82F6;
  --blue-deep: #60A5FA;
  --disc: rgba(255, 255, 255, 0.18);
  --purple: #A78BFA;
  --logo-ink: #FFFFFF;
  --btn-ink: #FFFFFF;
  --chip-bg: rgba(255, 255, 255, 0.04);
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--tdh-font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.35s ease, color 0.35s ease;
}

@media (prefers-reduced-motion: reduce) {
  body {
    transition: none;
  }
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

/* Layout helpers */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding-inline: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  padding: 9px 18px;
}

.btn--primary,
.btn--secondary {
  font-size: 15px;
  padding: 14px 26px;
  border-radius: 10px;
}

.btn--primary {
  background: var(--blue);
  color: var(--tdh-white);
}

.btn--primary:hover {
  background: var(--blue-deep);
}

.btn--secondary {
  color: var(--btn-ink);
  border: 1px solid var(--line);
}

.btn--secondary:hover {
  border-color: var(--muted);
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-block: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 17px;
  letter-spacing: -0.035em;
}

.brand__tdh {
  font-weight: 800;
}

.brand__labs {
  font-weight: 500;
  color: var(--muted);
  margin-left: 6px;
}

.nav {
  flex: 1;
}

.nav-links {
  display: flex;
  gap: 32px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--tdh-font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--chip-bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 12px;
  white-space: nowrap;
}

.theme-toggle__dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--blue);
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 72px;
  align-items: center;
  padding-block: 96px 112px;
  border-bottom: 1px solid var(--line);
}

.hero__text {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.eyebrow {
  font-family: var(--tdh-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
}

.hero h1 {
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.03;
  font-weight: 800;
  letter-spacing: -0.045em;
  max-width: 18ch;
}

.hero__lede {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  max-width: 44ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
  background: var(--bg-alt);
  border: 1px solid var(--line);
}

/* About ("o que fazemos") */
.about {
  padding-block: 104px;
  border-bottom: 1px solid var(--line);
}

.about__inner {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 72px;
  align-items: start;
}

.about__intro {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.about__intro h2 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.about__copy {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 66ch;
}

.about__lead {
  font-size: 19px;
  line-height: 1.6;
  color: var(--ink);
}

.about__copy p:not(.about__lead) {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
}

/* Principles grid */
.principles {
  border-bottom: 1px solid var(--line);
}

.principles__inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding-block: 0;
}

.principle {
  padding: 56px 40px;
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.principle:first-child {
  border-left: none;
}

.principle__num {
  font-family: var(--tdh-font-mono);
  font-size: 11px;
}

.principle__num--flagship {
  color: var(--blue);
}

.principle__num--accent {
  color: var(--purple);
}

.principle__num--muted {
  color: var(--muted);
}

.principle h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.principle p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
}

/* Shortec roadmap */
.roadmap {
  background: var(--bg-alt);
  padding-block: 104px;
  border-bottom: 1px solid var(--line);
}

.roadmap__inner {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 72px;
  align-items: start;
}

.roadmap__intro {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.roadmap__intro h2 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

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

.roadmap__item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  padding-block: 30px;
  border-top: 1px solid var(--line);
}

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

.roadmap__item-text {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.roadmap__item-text h3 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.roadmap__item-text p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  max-width: 52ch;
}

.badge {
  flex: 0 0 auto;
  font-family: var(--tdh-font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 6px 11px;
}

/* Contact */
.contact {
  padding-block: 104px;
}

.contact__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  text-align: center;
}

.contact h2 {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  max-width: 24ch;
}

.contact p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  max-width: 48ch;
}

/* Footer */
footer {
  border-top: 1px solid var(--line);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-block: 32px;
  font-family: var(--tdh-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Responsive: tablet (<=1023px) — spacing comfort + two-column info grids collapse */
@media (max-width: 1023px) {
  .container {
    padding-inline: 24px;
  }

  .principle {
    padding: 36px 24px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 40px;
    padding-block: 72px 80px;
  }

  .hero__visual {
    max-width: 280px;
    margin: 0 auto;
  }

  .about__inner,
  .roadmap__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* Responsive: mobile (<768px) — collapse nav behind hamburger, stack grids */
@media (max-width: 767.98px) {
  .header__inner {
    flex-wrap: wrap;
    row-gap: 16px;
  }

  .brand {
    order: 1;
  }

  .nav-toggle {
    display: flex;
    order: 2;
    margin-left: auto;
  }

  .theme-toggle {
    order: 3;
  }

  .nav {
    order: 4;
    flex-basis: 100%;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    gap: 0;
    width: 100%;
    border-top: 1px solid var(--line);
  }

  .nav-links.is-open,
  html.no-js .nav-links {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

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

  .principle {
    border-left: none;
    border-top: 1px solid var(--line);
  }

  .principle:first-child {
    border-top: none;
  }

  .roadmap__item {
    flex-direction: column;
    gap: 12px;
  }

  .contact h2 {
    font-size: 28px;
  }
}