:root {
  --red: #cd1818;
  --red-dark: #a91313;
  --red-soft: #fcebeb;
  --ink: #111113;
  --muted: #5d5d6a;
  --line: #e7e7ec;
  --bg: #f6f6f8;
  --card: #ffffff;
  --kamba-bg: #0c0c10;
  --kamba-card: #16161d;
  --kamba-line: #2a2a35;
  --kamba-red: #e43d40;
  --radius: 20px;
  --shadow: 0 20px 50px -20px rgba(17, 17, 19, 0.25);
  --max: 1160px;
}

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

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

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
}

p {
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.icon {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--ink);
  color: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  z-index: 100;
}

.skip-link:focus {
  left: 8px;
}

/* Cabeçalho */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 246, 248, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  text-decoration: none;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 12px;
}

.brand b {
  color: var(--red);
  font-weight: inherit;
}

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  transition: color 0.15s;
}

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

.nav .btn-primary,
.nav .btn-primary:hover {
  color: #fff;
}

/* Botões */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 22px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 0.98rem;
  text-decoration: none;
  transition: transform 0.15s, background 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}

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

.btn .icon {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--red);
  color: #fff;
  box-shadow: 0 10px 24px -10px rgba(205, 24, 24, 0.7);
}

.btn-primary:hover {
  background: var(--red-dark);
}

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

.btn-sm {
  height: 40px;
  padding: 0 16px;
  font-size: 0.9rem;
  border-radius: 12px;
}

/* Hero */

.hero {
  padding: 72px 0 96px;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  align-items: center;
  gap: 56px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--red-soft);
  color: var(--red);
  font-weight: 700;
  font-size: 0.85rem;
}

.hero h1 {
  margin-top: 20px;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
}

.hero h1 em {
  font-style: normal;
  color: var(--red);
}

.hero .lead {
  margin-top: 20px;
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 34rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.stores {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--muted);
}

.store {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 12px;
  border: 1px dashed #cfcfd8;
}

.store .icon {
  width: 16px;
  height: 16px;
}

/* Maquete do hero */

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

.mock {
  position: relative;
  width: min(340px, 86%);
  border-radius: 28px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.mock-real {
  align-self: flex-start;
  padding-bottom: 40px;
  background: var(--card);
  border: 1px solid var(--line);
}

.mock-kamba {
  align-self: flex-end;
  margin-top: -30px;
  background: var(--kamba-bg);
  color: #f4f4f6;
  border: 1px solid var(--kamba-line);
}

.mock-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: var(--bg);
  font-size: 0.78rem;
  font-weight: 700;
  text-align: center;
}

.mock-kamba .mock-switch {
  background: var(--kamba-card);
}

.mock-switch span {
  padding: 7px 0;
  border-radius: 999px;
  color: var(--muted);
}

.mock-switch .on {
  background: var(--red);
  color: #fff;
}

.mock-kamba .mock-switch span {
  color: #8d8d9c;
}

.mock-kamba .mock-switch .on {
  background: var(--kamba-red);
  color: #fff;
}

.mock-peer {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 16px 0 12px;
}

.avatar {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--red-soft);
  color: var(--red);
  font-weight: 800;
  font-size: 0.85rem;
}

.mock-kamba .avatar {
  background: #2a1517;
  color: var(--kamba-red);
}

.mock-peer strong {
  display: block;
  font-size: 0.95rem;
}

.mock-peer small {
  color: #1f9d55;
  font-size: 0.75rem;
  font-weight: 600;
}

.mock-kamba .mock-peer small {
  color: #8d8d9c;
}

.bubble {
  width: fit-content;
  max-width: 82%;
  padding: 9px 13px;
  border-radius: 16px;
  font-size: 0.88rem;
  margin-top: 8px;
}

.bubble-in {
  background: var(--bg);
  border-bottom-left-radius: 6px;
}

.bubble-out {
  margin-left: auto;
  background: var(--red);
  color: #fff;
  border-bottom-right-radius: 6px;
}

.mock-kamba .bubble-in {
  background: var(--kamba-card);
}

.mock-kamba .bubble-out {
  background: var(--kamba-red);
}

.ticks {
  display: block;
  text-align: right;
  font-size: 0.7rem;
  opacity: 0.8;
  margin-top: 2px;
}

.kamba-number {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 16px;
  background: var(--kamba-card);
  border: 1px solid var(--kamba-line);
  font-size: 0.82rem;
  color: #b9b9c6;
}

.kamba-number strong {
  display: block;
  color: #fff;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
}

.kamba-number .icon {
  color: var(--kamba-red);
}

/* Secções */

.section {
  padding: 96px 0;
  scroll-margin-top: 72px;
}

.section-head {
  max-width: 44rem;
  margin: 0 auto 56px;
  text-align: center;
}

.section-head h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  font-weight: 800;
}

.section-head p {
  margin-top: 16px;
  color: var(--muted);
  font-size: 1.08rem;
}

.kicker {
  display: block;
  margin-bottom: 12px;
  color: var(--red);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Duas identidades */

.identities {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.identity {
  padding: 40px;
  border-radius: 28px;
  background: var(--card);
  border: 1px solid var(--line);
}

.identity.kamba {
  background: var(--kamba-bg);
  border-color: var(--kamba-line);
  color: #f4f4f6;
}

.identity .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--red-soft);
  color: var(--red);
  font-weight: 700;
  font-size: 0.82rem;
}

.identity.kamba .badge {
  background: #2a1517;
  color: var(--kamba-red);
}

.identity .badge .icon {
  width: 16px;
  height: 16px;
}

.identity h3 {
  margin-top: 20px;
  font-size: 1.6rem;
  font-weight: 800;
}

.identity > p {
  margin-top: 12px;
  color: var(--muted);
}

.identity.kamba > p {
  color: #b9b9c6;
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
}

.checklist li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.checklist .icon {
  width: 20px;
  height: 20px;
  margin-top: 3px;
  color: var(--red);
}

.identity.kamba .checklist .icon {
  color: var(--kamba-red);
}

/* Funcionalidades */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--red-soft);
  color: var(--red);
}

.feature h3 {
  margin-top: 18px;
  font-size: 1.12rem;
  font-weight: 700;
}

.feature p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Privacidade */

.privacy {
  background: var(--kamba-bg);
  color: #f4f4f6;
}

.privacy .section-head p {
  color: #b9b9c6;
}

.privacy .kicker {
  color: var(--kamba-red);
}

.privacy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.privacy-item {
  display: flex;
  gap: 16px;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--kamba-card);
  border: 1px solid var(--kamba-line);
}

.privacy-item .icon {
  color: var(--kamba-red);
  margin-top: 2px;
}

.privacy-item h3 {
  font-size: 1.08rem;
  font-weight: 700;
}

.privacy-item p {
  margin-top: 6px;
  color: #b9b9c6;
  font-size: 0.95rem;
}

/* Passos */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
}

.step {
  position: relative;
  padding: 32px 28px 28px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  font-weight: 800;
}

.step h3 {
  margin-top: 18px;
  font-size: 1.12rem;
  font-weight: 700;
}

.step p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Perguntas frequentes */

.faq {
  max-width: 48rem;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.faq details {
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 0 24px;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  font-weight: 700;
  font-size: 1.02rem;
}

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

.faq summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--red);
  line-height: 1;
}

.faq details[open] summary::after {
  content: "\2212";
}

.faq details p {
  padding-bottom: 20px;
  color: var(--muted);
}

.faq details a {
  color: var(--red);
  font-weight: 600;
}

/* Chamada final */

.cta {
  padding: 0 0 96px;
}

.cta-box {
  padding: 64px 40px;
  border-radius: 32px;
  background: linear-gradient(135deg, var(--red) 0%, #8f0f0f 100%);
  color: #fff;
  text-align: center;
}

.cta-box h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.5rem);
  font-weight: 800;
}

.cta-box p {
  margin: 16px auto 0;
  max-width: 34rem;
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.08rem;
}

.cta-box .hero-actions {
  justify-content: center;
}

.cta-box .btn-primary {
  background: #fff;
  color: var(--red);
  box-shadow: none;
}

.cta-box .btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

/* Rodapé */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links a {
  text-decoration: none;
}

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

/* Páginas de texto (legais) */

.doc {
  padding: 64px 0 96px;
}

.doc article {
  max-width: 46rem;
  margin: 0 auto;
  padding: 48px;
  border-radius: 28px;
  background: var(--card);
  border: 1px solid var(--line);
}

.doc h1 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 800;
}

.doc .updated {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.doc h2 {
  margin-top: 40px;
  font-size: 1.3rem;
  font-weight: 700;
}

.doc p,
.doc ul,
.doc ol {
  margin-top: 14px;
  color: #33333d;
}

.doc ul,
.doc ol {
  padding-left: 22px;
}

.doc li + li {
  margin-top: 6px;
}

.doc a {
  color: var(--red);
  font-weight: 600;
}

.doc .note {
  margin-top: 24px;
  padding: 16px 20px;
  border-radius: 14px;
  background: var(--red-soft);
  color: var(--red-dark);
}

/* Página 404 */

.not-found {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 64px 0;
}

.not-found h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
}

.not-found p {
  margin-top: 12px;
  color: var(--muted);
}

.not-found .hero-actions {
  justify-content: center;
}

/* Responsivo */

@media (max-width: 960px) {
  .hero .container,
  .identities {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 48px;
  }

  .mockups {
    max-width: 480px;
    width: 100%;
    margin: 0 auto;
  }

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

@media (max-width: 760px) {
  .nav a:not(.btn) {
    display: none;
  }

  .privacy-grid,
  .features,
  .steps {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 72px 0;
  }

  .identity,
  .doc article {
    padding: 28px;
  }

  .cta-box {
    padding: 48px 24px;
  }
}

@media (max-width: 420px) {
  .hero-actions .btn {
    width: 100%;
  }

  .mock {
    width: 90%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn {
    transition: none;
  }
}