/* ================================================================
   SISTEMA DE DESIGN — RAUL CAVALCANTI
   ----------------------------------------------------------------
   Linguagem visual inspirada em dot4.co: fundo escuro levemente
   acinzentado (nunca preto puro), bordas levemente arredondadas em
   todo elemento de superfície (cards, imagens, botões, inputs),
   Hero e grid de projetos "emoldurados" (nunca colados na borda da
   tela), tipografia Helvetica Neue com uma escala tipográfica única
   e coerente para todos os títulos do site, e animações fluidas em
   hovers, ícones, menus e caixas.

   Compartilhado por index.html, project.html e dashboard.html —
   é o que garante que os três tenham a MESMA linguagem visual.
   ================================================================ */

:root{
  /* ---------- cor ---------- */
  --bg:          #0a0a0c;              /* fundo do site: preto quase puro, mas nunca 100% */
  --bg-1:        #0d0d10;
  --surface:     #131316;              /* cards, painéis, placeholders */
  --surface-2:   #18181c;              /* hover / elevação extra */
  --surface-3:   #202024;
  --ink:         #F3F1EC;              /* texto principal (off-white, não puro) */
  --ink-soft:    rgba(243,241,236,0.66);
  --ink-faint:   rgba(243,241,236,0.40);
  --ink-ghost:   rgba(243,241,236,0.20);
  --line:        rgba(243,241,236,0.09);
  --line-strong: rgba(243,241,236,0.18);
  --danger:      #E8604C;
  --danger-soft: rgba(232,96,76,0.12);

  /* ---------- forma ---------- */
  --r-xl: 32px;   /* hero, painéis grandes */
  --r-lg: 22px;   /* cards do grid, stage, modais */
  --r-md: 16px;   /* cards menores, previews */
  --r-sm: 12px;   /* botões, inputs, tags */
  --r-xs: 8px;    /* chips pequenos, ícones */
  --r-pill: 999px;

  /* ---------- layout ---------- */
  --page-pad: clamp(20px, 6vw, 96px);
  --nav-h: 76px;

  /* ---------- tipografia ---------- */
  --font: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --fs-display: clamp(2.6rem, 6.4vw, 5.4rem);
  --fs-h1:      clamp(2rem, 4.4vw, 3.4rem);
  --fs-h2:      clamp(1.5rem, 2.8vw, 2.2rem);
  --fs-h3:      clamp(1.05rem, 1.7vw, 1.4rem);
  --fs-body-lg: clamp(1.05rem, 1.6vw, 1.3rem);
  --fs-body:    1rem;
  --fs-small:   0.8125rem;
  --fs-label:   0.6875rem;
  --tr-tight:   -0.03em;
  --tr-label:   0.14em;

  /* ---------- movimento ---------- */
  --ease:      cubic-bezier(0.16,1,0.3,1);
  --ease-soft: cubic-bezier(0.22,1,0.36,1);
  --dur-fast:  0.22s;
  --dur:       0.45s;
  --dur-slow:  0.9s;

  --shadow-card: 0 20px 50px -24px rgba(0,0,0,0.65);
  --shadow-pop:  0 30px 80px -30px rgba(0,0,0,0.75), 0 0 0 1px rgba(243,241,236,0.06);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 18px); }
body{
  margin:0; background: var(--bg); color: var(--ink);
  font-family: var(--font); line-height: 1.5; -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4{ font-family: var(--font); font-weight: 500; letter-spacing: var(--tr-tight); margin: 0; }
p{ margin: 0; }
a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; }
::selection{ background: var(--ink); color: var(--bg); }

/* Scrollbar fina e discreta, no mesmo tom do site (Chrome/Edge/Firefox) */
*{ scrollbar-width: thin; scrollbar-color: var(--ink-ghost) transparent; }
::-webkit-scrollbar{ width: 9px; height: 9px; }
::-webkit-scrollbar-track{ background: transparent; }
::-webkit-scrollbar-thumb{ background: var(--surface-3); border-radius: var(--r-pill); border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover{ background: var(--ink-ghost); }

/* ---------- rótulos / labels (mono uppercase tracked) ---------- */
.label{
  font-family: var(--font); font-size: var(--fs-label); letter-spacing: var(--tr-label);
  text-transform: uppercase; color: var(--ink-faint); font-weight: 500;
}

/* ---------- cursor customizado (index / project) ----------
   Mantém o comportamento original: um ponto que segue o mouse com
   leve inércia, sem trocar de forma sobre links — só some sobre
   campos de formulário nativos. mix-blend-mode:difference garante
   contraste tanto sobre o fundo escuro quanto sobre imagens claras. */
.custom-cursor{
  position: fixed; top:0; left:0; width: 9px; height: 9px; border-radius: 50%;
  background: var(--ink); pointer-events: none; z-index: 9999;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.35);
  will-change: transform; transition: opacity .2s var(--ease);
}
@media (hover: none){ .custom-cursor{ display: none; } }
/* Páginas que usam o cursor customizado (index/project) escondem o
   cursor nativo diretamente no <body> delas: body{ cursor:none; }
   + @media(hover:none){ body{ cursor:auto; } } para touch. */

/* ---------- ícones inline (svg) ----------
   Ícones ficam dentro de um wrapper .icn que controla tamanho e
   transição — o próprio <svg>/<path> anima no hover do elemento pai. */
.icn{ display:inline-flex; align-items:center; justify-content:center; flex-shrink:0; }
.icn svg{ display:block; width:100%; height:100%; }
.icn-arrow{ width: 13px; height: 13px; }
.icn-arrow svg{ transition: transform var(--dur) var(--ease); }
a:hover .icn-arrow svg, button:hover .icn-arrow svg{ transform: translate(3px,-3px); }
.icn-arrow-left svg{ transition: transform var(--dur) var(--ease); }
a:hover .icn-arrow-left svg{ transform: translate(-3px,0); }

/* Botão hambúrguer: duas linhas que se transformam em X de forma fluida */
.burger{
  width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--line-strong);
  background: rgba(243,241,236,0.03); display:none; align-items:center; justify-content:center;
  cursor: none; position: relative; flex-shrink:0; transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.burger:hover{ background: rgba(243,241,236,0.08); }
.burger span{
  position:absolute; left:9px; right:9px; height:1px; background: var(--ink);
  transition: transform var(--dur) var(--ease-soft), opacity var(--dur-fast) var(--ease), top var(--dur) var(--ease-soft);
}
.burger span:nth-child(1){ top: 13px; }
.burger span:nth-child(2){ top: 20px; }
.burger.open span:nth-child(1){ top: 16.5px; transform: rotate(45deg); }
.burger.open span:nth-child(2){ top: 16.5px; transform: rotate(-45deg); }

/* ---------- navegação pública (index / project) ----------
   Barra flutuante e transparente sobre o Hero; ao rolar, "condensa"
   num pill inset com blur e sombra — transição suave de todas as
   propriedades ao mesmo tempo (fluida, não um corte seco). */
.site-nav{
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display:flex; align-items:center; justify-content:space-between;
  height: var(--nav-h); padding: 0 var(--page-pad);
  margin: 0; border-radius: 0;
  background: transparent; border: 1px solid transparent;
  backdrop-filter: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
              margin var(--dur) var(--ease), border-radius var(--dur) var(--ease),
              padding var(--dur) var(--ease), top var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.site-nav.solid{
  top: 12px; margin: 0 var(--page-pad); left:0; right:0;
  height: 62px; padding: 0 22px; border-radius: var(--r-pill);
  background: rgba(24,24,27,0.72); backdrop-filter: blur(14px) saturate(1.4);
  border: 1px solid var(--line); box-shadow: var(--shadow-card);
}
.site-nav .logo{
  font-weight: 600; font-size: 14px; letter-spacing: 0.01em; color: var(--ink);
  display:flex; align-items:center; gap:10px;
}
.site-nav .logo .dot{ width:7px; height:7px; border-radius:50%; background: var(--ink); flex-shrink:0; }
.site-nav .right{ display:flex; align-items:center; gap: 30px; }
.site-nav .links{ display:flex; gap: 34px; }
.site-nav .links a{
  position:relative; font-size: 12px; letter-spacing: var(--tr-label); text-transform: uppercase;
  color: var(--ink-soft); padding-bottom:4px; transition: color var(--dur-fast) var(--ease);
}
.site-nav .links a::after{
  content:''; position:absolute; left:0; bottom:0; width:100%; height:1px; background: var(--ink);
  transform: scaleX(0); transform-origin: left; transition: transform var(--dur) var(--ease);
}
.site-nav .links a:hover{ color: var(--ink); }
.site-nav .links a:hover::after{ transform: scaleX(1); }

.lang-switch{ display:flex; gap:4px; }
.lang-switch button{
  font-family: var(--font); font-size: 10.5px; letter-spacing:0.05em; background:none;
  border:1px solid var(--line-strong); color: var(--ink-soft); padding:5px 10px; border-radius: var(--r-pill);
  cursor:none; transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.lang-switch button.active{ background:var(--ink); color:var(--bg); border-color:var(--ink); }
.lang-switch button:not(.active):hover{ border-color: var(--ink-soft); color: var(--ink); }

@media (max-width: 780px){
  .site-nav .links{ display:none; }
  .burger{ display:flex; }
}

/* ---------- menu mobile (overlay) ----------
   Painel de tela cheia com fundo levemente translúcido/blur; os
   links entram em cascata (delay incremental) — fecha do mesmo jeito,
   em reverso, com fade + leve deslocamento. */
.mobile-menu{
  position: fixed; inset: 0; z-index: 99; display:flex; flex-direction:column;
  justify-content:center; padding: 0 var(--page-pad);
  background: rgba(19,19,21,0.86); backdrop-filter: blur(20px);
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease), visibility 0s linear var(--dur-slow);
}
.mobile-menu.open{
  opacity: 1; visibility: visible; transform: translateY(0);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease), visibility 0s;
}
.mobile-menu a{
  display:block; font-size: clamp(1.8rem, 9vw, 2.6rem); font-weight:500; letter-spacing: var(--tr-tight);
  padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--ink);
  opacity:0; transform: translateY(16px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), color var(--dur-fast) var(--ease);
}
.mobile-menu.open a{ opacity:1; transform: translateY(0); }
.mobile-menu.open a:nth-child(1){ transition-delay: .08s; }
.mobile-menu.open a:nth-child(2){ transition-delay: .13s; }
.mobile-menu.open a:nth-child(3){ transition-delay: .18s; }
.mobile-menu.open a:nth-child(4){ transition-delay: .23s; }
.mobile-menu a:hover{ color: var(--ink-soft); }
.mobile-menu .mm-foot{
  display:flex; gap:20px; margin-top: 36px; opacity:0; transform: translateY(16px);
  transition: opacity var(--dur) var(--ease) .3s, transform var(--dur) var(--ease) .3s;
}
.mobile-menu.open .mm-foot{ opacity:1; transform: translateY(0); }
.mobile-menu .mm-foot a{ font-size: var(--fs-label); letter-spacing: var(--tr-label); text-transform:uppercase; padding:0; border:none; color: var(--ink-faint); }
body.menu-open{ overflow: hidden; }

/* ---------- reveal ao rolar (fade + leve translação, uma vez só) ---------- */
.reveal{ opacity:0; transform: translateY(26px); transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease); }
.reveal.in-view{ opacity:1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce){
  .reveal{ transition:none !important; opacity:1 !important; transform:none !important; }
  .custom-cursor{ display:none; }
}

/* ---------- botão-base com ícone (usado como CTA em vários pontos) ----------
   Preenchimento "wipe" de baixo pra cima no hover + ícone de seta que
   desliza — mesma linguagem de interação em todos os CTAs do site. */
.btn-cta{
  position:relative; overflow:hidden; display:inline-flex; align-items:center; gap:10px;
  font-size: 12px; letter-spacing: var(--tr-label); text-transform:uppercase; font-weight:500;
  padding: 15px 24px; border-radius: var(--r-pill); border: 1px solid var(--line-strong);
  color: var(--ink); background: rgba(243,241,236,0.02); z-index:0;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn-cta::before{
  content:''; position:absolute; inset:0; background: var(--ink); border-radius: inherit;
  transform: translateY(100%); transition: transform var(--dur) var(--ease-soft); z-index:-1;
}
.btn-cta:hover{ color: var(--bg); border-color: var(--ink); }
.btn-cta:hover::before{ transform: translateY(0); }
.btn-cta.solid{ background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn-cta.solid::before{ background: var(--bg); }
.btn-cta.solid:hover{ color: var(--ink); }

/* ---------- rodapé público (index / project) ---------- */
.site-footer{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;
  padding: 28px var(--page-pad) 36px; font-size: var(--fs-label); letter-spacing:0.04em;
  color: var(--ink-faint); border-top: 1px solid var(--line); margin: 0 var(--page-pad);
}
.site-footer a{ color: var(--ink-faint); border-bottom: 1px solid var(--ink-ghost); transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease); }
.site-footer a:hover{ color: var(--ink); border-color: var(--ink); }