/* ============================================
   HENRIQUE.ARKHO.CLOUD — Unified Stylesheet
   Philosophy: Less, but better. — Dieter Rams
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600&display=swap');

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

:root {
  --ice:    #f5f5f5;
  --carbon: #121212;
  --mid:    #888888;
  --border: 1px solid currentColor;
  --radius: 3px;
  --font:   'DM Sans', Helvetica, Arial, sans-serif;
  --transition: 180ms ease;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ─── Home: Light ─── */
body.home {
  background-color: var(--ice);
  color: var(--carbon);
}

/* ─── Atlas: Dark ─── */
body.atlas {
  background-color: var(--carbon);
  color: var(--ice);
}

/* ─── Layout Shell ─── */
.shell {
  width: 100%;
  max-width: 480px;
  padding: 3rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* ─── Header ─── */
header {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.name {
  font-size: clamp(1.35rem, 5vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.subtitle {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--mid);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ─── Rule ─── */
hr.rule {
  border: none;
  border-top: 1px solid currentColor;
  opacity: 0.15;
}

/* ─── Buttons ─── */
nav.links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.125rem;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  text-decoration: none;
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: opacity var(--transition), background-color var(--transition), color var(--transition);
  position: relative;
  background: transparent;
  color: inherit;
}

/* Home buttons */
body.home .btn {
  border-color: var(--carbon);
  color: var(--carbon);
}

body.home .btn:hover {
  background-color: var(--carbon);
  color: var(--ice);
}

/* Atlas buttons */
body.atlas .btn {
  border-color: var(--ice);
  color: var(--ice);
}

body.atlas .btn:hover {
  background-color: var(--ice);
  color: var(--carbon);
}

/* Atlas button — soon (disabled) */
body.atlas .btn.disabled {
  opacity: 0.35;
  cursor: not-allowed;
  border-color: var(--mid);
  color: var(--mid);
}

body.atlas .btn.disabled:hover {
  background: transparent;
  color: var(--mid);
}

.btn-arrow {
  font-size: 0.75rem;
  opacity: 0.5;
  transition: transform var(--transition);
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
  opacity: 1;
}

.btn.disabled:hover .btn-arrow {
  transform: none;
}

/* Correção para iPhone: Usar a seta normal rodada */
.btn-arrow.external {
  display: inline-block;
  transform: rotate(-45deg);
  transform-origin: center;
}

/* Ajuste do Hover para não perder a rotação */
.btn:hover .btn-arrow.external {
  transform: rotate(-45deg) translateX(3px);
}

/* ─── Atlas: Title Block ─── */
.atlas-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.atlas-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mid);
}

.atlas-title {
  font-size: clamp(1.1rem, 4.5vw, 1.5rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.atlas-full {
  font-size: 0.75rem;
  color: var(--mid);
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-top: 0.25rem;
}

/* ─── Atlas: Content & Typography ─── */
.atlas-content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.atlas-subtitle {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 0.75rem;
  display: block;
}

.atlas-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.atlas-list li {
  position: relative;
  padding-left: 0;
}

.atlas-list strong {
  color: var(--ice);
  font-weight: 600;
}

/* ─── Body Text ─── */
.body-text {
  font-size: 0.875rem;
  line-height: 1.75;
  color: inherit;
  opacity: 0.78;
}

/* ─── Back link ─── */
.back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--mid);
  transition: color var(--transition);
}

.back:hover {
  color: var(--ice);
}

/* ─── Footer ─── */
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.6875rem;
  opacity: 0.3;
  letter-spacing: 0.05em;
}

footer .hbar {
  font-family: Georgia, serif;
  font-style: italic;
}

/* ─── Responsive ─── */
@media (max-width: 480px) {
  .shell {
    padding: 2.5rem 1.5rem;
    gap: 2.25rem;
  }
}