/* ============================================================================
   GHXST — Fundação de UI (Ether)
   Design system monocromático e flat, em CSS moderno. Serve o hub, o login e a
   landing. Sem sombras, sem gradientes, sem blur: elevação vem de SUPERFÍCIE
   (paper → card → ink) + borda de 1px. A menta (#3DDC97) só aparece quando algo
   ACONTECE (hover, foco, "disponível", progresso) — nunca como texto sobre claro.
   ============================================================================ */

/* ---- Tokens ------------------------------------------------------------- */
:root {
  /* base */
  --ink:      #17171A;
  --ink-2:    #202024;   /* hover sobre ink */
  --paper:    #ECEAE6;
  --card:     #F7F6F3;
  --mint:     #3DDC97;
  --mint-2:   #35C687;   /* hover da menta (só como fundo/acento, nunca texto) */
  --coral:    #E5735C;
  --coral-ink:#9E3B2A;   /* coral escurecido: texto de erro sobre claro (AA) */
  --mist:     #B3B0A9;
  --line:     #DBD8D2;
  --line-2:   #C9C6BF;
  --gray-600: #5C584F;   /* texto secundário legível (>=4.5:1 sobre paper/card) */
  --gray-500: #5C584F;   /* alias de compatibilidade (mesmo valor escurecido) */
  --gray-700: #454440;   /* texto corrido */

  /* dark surfaces (nav/hero sobre ink) */
  --on-dark:      #ECEAE6;
  --on-dark-mut:  #B7B4AC;   /* mais claro p/ contraste sobre ink */
  --line-dark:    #33333A;
  --line-dark-2:  #454440;

  /* tipografia */
  --font: 'Schibsted Grotesk', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: 'JetBrains Mono', 'SFMono-Regular', ui-monospace, monospace;

  /* raios */
  --r-sm: 12px; --r-md: 16px; --r-lg: 20px; --r-xl: 28px; --r-pill: 999px;
  /* raio proporcional do Arco (mesma silhueta em qualquer escala) */
  --arc-radius: 50% 50% 10% 10% / 41.67% 41.67% 8.33% 8.33%;

  /* espaçamento fluido de seção */
  --pad-x: clamp(20px, 5vw, 64px);
  --sec-y: clamp(64px, 11vh, 140px);
  --maxw: 1120px;

  /* motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-io: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 140ms; --t-base: 240ms; --t-slow: 520ms;

  color-scheme: light;
}

/* ---- Reset / base ------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--gray-700);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
:where(button, a, input, [tabindex]):focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Skip link (acessibilidade de teclado) */
.gx-skip {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--ink); color: var(--card); padding: 10px 16px;
  border-radius: var(--r-pill); font-size: 14px; text-decoration: none;
  transition: top var(--t-base) var(--ease);
}
.gx-skip:focus { top: 12px; }

/* ---- Tipografia --------------------------------------------------------- */
.gx-eyebrow {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--gray-600);
  margin: 0;
}
.gx-eyebrow.on-dark { color: var(--on-dark-mut); }
.gx-display {
  font-weight: 900; letter-spacing: -0.045em; line-height: 0.98;
  font-size: clamp(44px, 9vw, 116px); color: var(--ink);
  margin: 0; text-wrap: balance;
}
.gx-h2 {
  font-weight: 900; letter-spacing: -0.03em; line-height: 1.02;
  font-size: clamp(30px, 5vw, 56px); color: var(--ink); margin: 0; text-wrap: balance;
}
.gx-h3 {
  font-weight: 700; letter-spacing: -0.02em; font-size: clamp(20px, 2.4vw, 26px);
  color: var(--ink); margin: 0;
}
.gx-lead {
  font-size: clamp(17px, 2vw, 21px); line-height: 1.55; color: var(--gray-600);
  margin: 0; max-width: 60ch; text-wrap: pretty;
}
.gx-mono { font-family: var(--mono); }
/* acento de destaque: texto INK com sublinhado MENTA (menta só como acento) */
.gx-mint {
  color: var(--ink);
  text-decoration: underline; text-decoration-color: var(--mint);
  text-decoration-thickness: 0.1em; text-underline-offset: 0.12em;
}

/* ---- Layout ------------------------------------------------------------- */
.gx-container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad-x); }
.gx-section { padding-block: var(--sec-y); }
.gx-divider { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---- O Arco (marca) — silhueta única via --arc-radius ------------------- */
.gx-arc {
  --arc-w: 22px;
  display: inline-block; width: var(--arc-w); height: calc(var(--arc-w) * 1.2);
  border-radius: var(--arc-radius); background: var(--ink); flex-shrink: 0;
}
.gx-arc.on-dark { background: var(--card); }

/* ---- Wordmark ----------------------------------------------------------- */
.gx-word {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
  color: var(--ink); font-weight: 900; letter-spacing: -0.03em; font-size: 19px;
}
.gx-word.on-dark { color: var(--card); }

/* ---- Botões ------------------------------------------------------------- */
.gx-btn {
  --bg: var(--ink); --fg: var(--card); --bd: var(--ink);
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 13px 24px; border-radius: var(--r-pill);
  font-family: var(--font); font-size: 15px; font-weight: 600; line-height: 1;
  text-decoration: none; cursor: pointer; border: 1.5px solid var(--bd);
  background: var(--bg); color: var(--fg); white-space: nowrap;
  transition: transform var(--t-fast) var(--ease), background var(--t-base) var(--ease),
              color var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.gx-btn:hover { background: var(--ink-2); transform: translateY(-1px); }
.gx-btn:active { transform: translateY(0); }
.gx-btn__arrow { transition: transform var(--t-base) var(--ease); }
.gx-btn:hover .gx-btn__arrow { transform: translateX(4px); }

.gx-btn--mint { --bg: var(--mint); --fg: var(--ink); --bd: var(--mint); }
.gx-btn--mint:hover { background: var(--mint-2); }
.gx-btn--ghost { --bg: transparent; --fg: var(--ink); --bd: var(--line-2); }
.gx-btn--ghost:hover { background: transparent; border-color: var(--ink); }
.gx-btn--on-dark { --bg: var(--card); --fg: var(--ink); --bd: var(--card); }
.gx-btn--on-dark:hover { background: #fff; }
.gx-btn--ghost-dark { --bg: transparent; --fg: var(--on-dark); --bd: var(--line-dark-2); }
.gx-btn--ghost-dark:hover { background: transparent; border-color: var(--on-dark); }
.gx-btn--block { width: 100%; }
.gx-btn--lg { padding: 16px 30px; font-size: 16px; }

/* ---- Badges / chips ----------------------------------------------------- */
.gx-badge {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; line-height: 1;
  padding: 6px 11px; border-radius: var(--r-pill); border: 1px solid var(--line);
  color: var(--gray-600);
}
.gx-badge--on { color: var(--ink); border-color: transparent; background: var(--mint); }
.gx-badge--on .gx-dot { background: var(--ink); animation: gx-pulse 2.4s var(--ease) infinite; }
.gx-badge--soon { color: var(--gray-600); }
.gx-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--mint); }

.gx-chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--gray-700);
  padding: 7px 13px; border-radius: var(--r-pill); border: 1px solid var(--line);
  background: var(--card);
}

/* ---- Ícones de módulo (linha, monocromáticos) --------------------------- */
.gx-mod-ico { color: var(--ink); width: 30px; height: 30px; }
.gx-mod-ico svg { width: 100%; height: 100%; display: block; }

/* ---- Cards -------------------------------------------------------------- */
.gx-card {
  position: relative; display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: clamp(22px, 3vw, 32px); overflow: hidden;
  transition: border-color var(--t-base) var(--ease), transform var(--t-base) var(--ease);
}
/* faixa de menta que "acontece" no topo do card ao interagir */
.gx-card::before {
  content: ''; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: var(--mint); transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-slow) var(--ease);
}
a.gx-card:hover, .gx-card.is-interactive:hover { border-color: var(--ink); transform: translateY(-3px); }
a.gx-card:hover::before, .gx-card.is-interactive:hover::before { transform: scaleX(1); }
.gx-card--muted { opacity: 0.72; }
.gx-card--dark { background: var(--ink); border-color: var(--line-dark); color: var(--on-dark); }

/* ---- Nav (landing) ------------------------------------------------------ */
.gx-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 16px var(--pad-x);
  background: transparent; border-bottom: 1px solid transparent;
  transition: background var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.gx-nav.is-stuck { background: var(--paper); border-bottom-color: var(--line); }
.gx-nav__links { display: flex; align-items: center; gap: 8px; }
.gx-nav__link {
  font-size: 14px; color: var(--gray-600); text-decoration: none;
  padding: 8px 12px; border-radius: var(--r-pill); transition: color var(--t-fast);
}
.gx-nav__link:hover { color: var(--ink); }
@media (max-width: 640px) { .gx-nav__link { display: none; } }

/* ---- Reveal (scroll) ---------------------------------------------------- */
/* A classe .js é adicionada pelo PRÓPRIO ghxst-ui.js. Se o JS não carregar,
   .js nunca é setada → conteúdo permanece visível (fallback seguro). */
.js .reveal { opacity: 0; transform: translateY(20px); will-change: opacity, transform; }
.js .reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity var(--t-slow) var(--ease-io), transform var(--t-slow) var(--ease-io);
  transition-delay: var(--d, 0ms);
}

/* entrada imediata (hero) */
.gx-enter { animation: gx-fade-up var(--t-slow) var(--ease-io) both; animation-delay: var(--d, 0ms); }
.lp-float { animation: gx-float 7s var(--ease) infinite; }

@keyframes gx-fade-up { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }
@keyframes gx-pulse   { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
@keyframes gx-float   { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* Motion OFF: neutraliza TODA animação/transição de uma vez. */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js .reveal { opacity: 1 !important; transform: none !important; }
}

/* ---- Utilitários -------------------------------------------------------- */
.gx-grid { display: grid; gap: clamp(14px, 2vw, 20px); }
.gx-cols-3 { grid-template-columns: repeat(3, 1fr); }
.gx-cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .gx-cols-3 { grid-template-columns: 1fr; } .gx-cols-2 { grid-template-columns: 1fr; } }
.gx-stack > * + * { margin-top: var(--gap, 16px); }
.gx-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.gx-muted { color: var(--gray-600); }
.gx-center { text-align: center; }
.gx-center .gx-lead { margin-inline: auto; }
[hidden] { display: none !important; }