/* ============================================================
   FVSYNAPSE — Base Stylesheet
   Estética: Terminal Industrial de Hardware (ref.: DESIGN.md / Elektron).
   Flat. Geometria rígida. Sem sombra. Sem gradiente. Sem arredondamento.
   Paleta ESTRITAMENTE monocromática (Elektron puro — sem acento colorido no chrome):
   - Preto Absoluto   #000000  (canvas / void)
   - Superfície       #151515  (cards / componentes)
   - Elevado          #1f1f1f  (hover / estado levantado)
   - Cinza Aço        #E0E0E0  (texto + bordas de estado)
   Estados de :hover/:active resolvem-se por contraste e geometria, nunca por cor.
   ============================================================ */

:root {
  --black: #000000;
  --surface: #151515;         /* superfície de card (Deep Surface) */
  --raised: #1f1f1f;          /* superfície levantada em hover */
  --steel: #E0E0E0;
  --line: #1a1a1a;            /* hairline sutil */
  --line-strong: #2a2a2a;     /* borda visível / vão de grid */

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'Space Mono', ui-monospace, monospace;

  --u: 4px;                   /* base unit */
  --header-h: 64px;
  --ease: cubic-bezier(0.2, 0, 0, 1);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  border-radius: 0;           /* geometria rígida — cantos 0px, sem exceção */
}

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

body {
  min-height: 100vh;
  background: var(--black);
  color: var(--steel);
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul {
  list-style: none;
}

/* ============================================================
   BOOT SEQUENCE — Túnel de Dados
   ============================================================ */

.boot {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 0.8s var(--ease);
}

.boot.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.boot__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ============================================================
   HEADER + BRAND (Identidade Principal — Opção A)
   ============================================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 calc(var(--u) * 8);
  background: var(--black);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--u) * 3);
  color: var(--steel);
}

.brand__mark {
  display: inline-flex;
  color: var(--steel);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.18em;     /* respiro / tracking corporativo */
}

/* ============================================================
   NAVEGAÇÃO — submenus rígidos (blocos sólidos, sem sombra)
   ============================================================ */

.nav__list {
  display: flex;
  align-items: stretch;
  height: var(--header-h);
}

.nav__item {
  position: relative;
  display: flex;
  align-items: stretch;
}

.nav__trigger {
  appearance: none;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.1em;      /* tracking de ficha de especificação */
  padding: 0 calc(var(--u) * 5);
  height: 100%;
  display: inline-flex;
  align-items: center;
  border-left: 1px solid transparent;
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease);
}

.nav__item:hover .nav__trigger,
.nav__item:focus-within .nav__trigger {
  border-left: 1px solid var(--steel);  /* micro-indicador ciano de estado */
  color: #ffffff;
}

/* Submenu desce como bloco sólido geométrico — sem flutuar, sem sombra */
.submenu {
  position: absolute;
  top: var(--header-h);
  left: 0;
  min-width: 240px;
  background: var(--black);
  border: 1px solid var(--line-strong);
  border-top: 1px solid var(--steel);    /* indicador técnico ciano de painel ativo */
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.15s var(--ease), transform 0.15s var(--ease), visibility 0.15s;
}

.nav__item:hover .submenu,
.nav__item:focus-within .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.submenu__link {
  display: block;
  padding: calc(var(--u) * 3) calc(var(--u) * 4);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
  border-left: 1px solid transparent;
  transition: border-color 0.12s var(--ease), background 0.12s var(--ease);
}

.submenu__link:hover {
  border-left: 1px solid var(--steel);
  background: var(--raised);
}

/* ============================================================
   CONTEÚDO PRINCIPAL
   ============================================================ */

.main {
  padding-top: var(--header-h);
}

.hero {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: calc(var(--u) * 5);
  padding: 0 calc(var(--u) * 8);
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(48px, 9vw, 112px);
  letter-spacing: -0.01em;
  line-height: 1.0;
  color: #ffffff;
}

.hero__subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--steel);
  max-width: 52ch;
}

/* ============================================================
   [ACTIVE_MODULES] — Vitrine de conversão
   ============================================================ */

.modules {
  padding: calc(var(--u) * 20) calc(var(--u) * 8);
  border-top: 1px solid var(--line);
}

.modules__head {
  margin-bottom: calc(var(--u) * 8);
}

.modules__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel);
}

.modules__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;                         /* hairline industrial */
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.module {
  background: var(--surface);       /* card em cinza profundo */
}

.module__link {
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 4);
  min-height: 240px;
  height: 100%;
  padding: calc(var(--u) * 8);
  border-left: 1px solid transparent;
  transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
}

.module__link:hover {
  border-left: 1px solid var(--steel);  /* micro-indicador ciano */
  background: var(--raised);
}

.module__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
  opacity: 0.55;
}

.module__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 24px;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.module__desc {
  font-size: 14px;
  line-height: 1.5;
  color: var(--steel);
  opacity: 0.8;
  max-width: 44ch;
}

.module__cue {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--steel);
  transition: color 0.15s var(--ease);
}

.module__link:hover .module__cue {
  color: #ffffff;                    /* micro-detalhe de estado ativo */
}

/* ============================================================
   PÁGINAS INTERNAS — shell
   ============================================================ */

.page {
  min-height: calc(100vh - var(--header-h));
  padding: calc(var(--u) * 20) calc(var(--u) * 8);
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 4);
}

.page__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel);
  opacity: 0.6;
}

.page__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(32px, 5vw, 56px);
  letter-spacing: -0.01em;
  color: #ffffff;
}

/* ============================================================
   SKILLS BROWSER — [AI_OPERATIONS] / Biblioteca de Skills
   ============================================================ */

.skills__bar {
  display: flex;
  align-items: center;
  gap: calc(var(--u) * 4);
  margin-top: calc(var(--u) * 4);
}

.search {
  display: flex;
  align-items: center;
  gap: calc(var(--u) * 2);
  flex: 1;
  max-width: 520px;
  padding: calc(var(--u) * 3) calc(var(--u) * 4);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  transition: border-color 0.15s var(--ease);
}

.search:focus-within {
  border-color: var(--steel);       /* foco do campo: borda 1px ciano, sem glow */
}

.search__prompt {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--steel);
  opacity: 0.6;
}

.search__input {
  flex: 1;
  appearance: none;
  background: transparent;
  border: none;
  outline: none;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  caret-color: var(--steel);
}

.search__input::placeholder {
  color: var(--steel);
  opacity: 0.35;
}

.skills__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  opacity: 0.6;
  white-space: nowrap;
}

.skills__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin-top: calc(var(--u) * 5);
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.skills__filter {
  appearance: none;
  cursor: pointer;
  background: var(--surface);
  border: none;
  border-top: 1px solid transparent;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;             /* rótulo curto: tracking de especificação */
  padding: calc(var(--u) * 2.5) calc(var(--u) * 4);
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease), background 0.15s var(--ease);
}

.skills__filter:hover {
  color: #ffffff;
  background: var(--raised);
}

.skills__filter.is-active {
  border-top: 1px solid var(--steel);   /* micro-indicador ciano de filtro ativo */
  color: #ffffff;
  background: var(--raised);
}

.skills__filter-n {
  opacity: 0.45;
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1px;
  margin-top: calc(var(--u) * 6);
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.skill {
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 3);
  padding: calc(var(--u) * 5);
  background: var(--surface);
}

.skill__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--u) * 3);
}

.skill__cmd {
  font-family: var(--font-mono);
  font-size: 14px;
  color: #ffffff;
  word-break: break-all;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s var(--ease);
}

.skill__cmd:hover {
  border-bottom: 1px solid var(--steel);
}

.skill__copy {
  appearance: none;
  flex-shrink: 0;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: calc(var(--u) * 1.5) calc(var(--u) * 3);
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease);
}

.skill__copy:hover,
.skill__copy.is-copied {
  border-color: var(--steel);       /* botão: borda 1px ciano em estado */
  color: #ffffff;
}

.skill__desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--steel);
  opacity: 0.8;
}

.skill__install {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--steel);
  opacity: 0.45;
  word-break: break-all;
}

.skill__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--u) * 3);
  margin-top: calc(var(--u) * 1);
}

.skill__cat {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--steel);
  opacity: 0.55;
  border: 1px solid var(--line-strong);
  padding: calc(var(--u) * 0.5) calc(var(--u) * 2);
}

.skill__github {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel);
  opacity: 0.7;
  border-bottom: 1px solid transparent;
  transition: opacity 0.15s var(--ease), color 0.15s var(--ease), border-color 0.15s var(--ease);
}

.skill__github:hover {
  opacity: 1;
  color: #ffffff;
  border-bottom: 1px solid var(--steel);
}

.skills__error {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--steel);
  padding: calc(var(--u) * 6);
}

/* ============================================================
   SKILL PAGE (SEO programático) — página física por skill
   ============================================================ */

.skilldoc {
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 5);
  margin-top: calc(var(--u) * 6);
  max-width: 760px;
}

.skilldoc__terminal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--u) * 4);
  padding: calc(var(--u) * 4) calc(var(--u) * 5);
  background: var(--surface);
  border: 1px solid var(--line-strong);
}

.skilldoc__cmd {
  font-family: var(--font-mono);
  font-size: 16px;
  color: #ffffff;
  word-break: break-all;
}

.skilldoc__copy {
  appearance: none;
  flex-shrink: 0;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: calc(var(--u) * 1.5) calc(var(--u) * 3);
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease);
}

.skilldoc__copy:hover,
.skilldoc__copy.is-copied {
  border-color: var(--steel);
  color: #ffffff;
}

.skilldoc__desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--steel);
}

.skilldoc__install {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
  opacity: 0.45;
  border-left: 1px solid var(--line-strong);
  padding-left: calc(var(--u) * 3);
  word-break: break-all;
}

.skilldoc__github {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
  border: 1px solid var(--line-strong);
  padding: calc(var(--u) * 2) calc(var(--u) * 4);
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease);
}

.skilldoc__github:hover {
  border-color: var(--steel);
  color: #ffffff;
}

.skilldoc__back {
  margin-top: calc(var(--u) * 8);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
  opacity: 0.7;
  transition: opacity 0.15s var(--ease);
}

.skilldoc__back:hover {
  opacity: 1;
}

/* ============================================================
   [NETWORK_HUB] — Nós de Conexão (Data Cards)
   ============================================================ */

.nodes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: calc(var(--u) * 6);
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.node {
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 4);
  min-height: 320px;
  padding: calc(var(--u) * 8);
  background: var(--surface);
  border-left: 1px solid transparent;
  transition: border-color 0.15s var(--ease);
}

.node:hover {
  border-left: 1px solid var(--steel);  /* micro-indicador ciano */
}

.node--vip {
  background: var(--raised);
}

.node__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
  opacity: 0.6;
}

.node__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 28px;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.node__desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--steel);
  opacity: 0.8;
  max-width: 42ch;
}

.node__links {
  display: flex;
  gap: calc(var(--u) * 4);
  margin-top: auto;
}

.node__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--steel);
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease);
}

.node__link:hover {
  border-bottom: 1px solid var(--steel);
  color: #ffffff;
}

.node__mods {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.node__mod {
  padding: calc(var(--u) * 2.5) calc(var(--u) * 3);
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.node__lock {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--u) * 4);
  margin-top: auto;
  padding-top: calc(var(--u) * 4);
  border-top: 1px solid var(--line-strong);
}

.node__status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel);
  opacity: 0.5;
}

.node__auth {
  appearance: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: calc(var(--u) * 2) calc(var(--u) * 4);
  cursor: not-allowed;
  opacity: 0.6;
}

@media (max-width: 760px) {
  .nodes {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   FOOTER — Marca de Interface (Opção C)
   ============================================================ */

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--u) * 4);
  padding: calc(var(--u) * 8);
  border-top: 1px solid var(--line);
}

.footer__brand {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--steel);
}

.footer__link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
  opacity: 0.7;
  border-bottom: 1px solid transparent;
  transition: opacity 0.15s var(--ease), border-color 0.15s var(--ease);
}

.footer__link:hover {
  opacity: 1;
  border-bottom: 1px solid var(--steel);
}

/* ============================================================
   RESPONSIVO
   ============================================================ */

@media (max-width: 760px) {
  .header {
    padding: 0 calc(var(--u) * 4);
  }
  .nav__list {
    display: none;            /* menu mobile dedicado entra numa próxima fase */
  }
  .modules__grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}