/* ==========================================================================
   CIRCULAR BRAIN — DESIGN SYSTEM
   Base compartilhada por todas as landing pages.
   Derivado do Manual de Identidade Visual 2026.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Paleta primária */
  --azul-profundo: #0A0144;
  --ciano: #06B6D4;
  --nuvem: #EEF0F8;

  /* Cores suporte */
  --citrico: #CEE346;
  --coral: #FF784D;

  /* Shades — Azul Profundo */
  --azul-125: #12027C;
  --azul-062: #04001A;
  --azul-050: #050123;
  --azul-037: #06012C;
  --azul-025: #080135;
  --azul-012: #09013E;

  /* Shades — Ciano */
  --ciano-250: #2CDAF8;
  --ciano-125: #08D4F7;
  --ciano--125: #069FBA;
  --ciano--250: #0588A0;
  --ciano--500: #035B6A;
  --ciano--625: #024450;

  /* Shades — Nuvem */
  --nuvem-125: #EFF1F9;
  --nuvem--125: #C2C9E6;
  --nuvem--250: #97A3D4;
  --nuvem--375: #6C7DC3;

  /* Shades — suporte */
  --citrico--125: #C6DE24;
  --coral--125: #F55623;

  /* Superfícies semânticas */
  --surface-dark: var(--azul-profundo);
  --surface-darker: var(--azul-025);
  --surface-elev: #140A52;
  --surface-light: var(--nuvem);
  --surface-white: #FFFFFF;

  /* Texto */
  --ink: var(--azul-profundo);
  --ink-muted: #4B5580;
  --ink-on-dark: var(--nuvem);
  --ink-on-dark-muted: #A8B0D6;

  /* Bordas */
  --line-dark: rgba(238, 240, 248, 0.14);
  --line-light: rgba(10, 1, 68, 0.12);

  /* Tipografia */
  --font-sans: 'DM Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'DM Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Escala tipográfica fluida */
  --fs-display: clamp(2.5rem, 1.4rem + 4.6vw, 4.5rem);
  --fs-h1: clamp(2.1rem, 1.4rem + 3vw, 3.4rem);
  --fs-h2: clamp(1.7rem, 1.25rem + 2vw, 2.6rem);
  --fs-h3: clamp(1.2rem, 1.05rem + 0.7vw, 1.5rem);
  --fs-lead: clamp(1.05rem, 0.98rem + 0.35vw, 1.25rem);
  --fs-body: 1rem;
  --fs-sm: 0.9rem;
  --fs-xs: 0.78rem;
  --fs-mono-label: 0.72rem;

  /* Espaçamento */
  --sp-1: 0.25rem; --sp-2: 0.5rem;  --sp-3: 0.75rem; --sp-4: 1rem;
  --sp-5: 1.5rem; --sp-6: 2rem;     --sp-7: 3rem;    --sp-8: 4rem;
  --sp-9: 5.5rem; --sp-10: 7.5rem;

  /* Layout */
  --container: 1200px;
  --container-narrow: 860px;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  /* Raios — extremidades arredondadas, ecoando o wordmark */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 24px;
  --r-pill: 999px;

  /* Sombras — discretas; a marca não usa sombra em logo, só em superfícies */
  --shadow-card: 0 1px 2px rgba(10,1,68,.05), 0 12px 32px -12px rgba(10,1,68,.16);
  --shadow-float: 0 24px 60px -20px rgba(10,1,68,.45);

  --ease: cubic-bezier(.22,.61,.36,1);
}

/* --------------------------------------------------------------------------
   2. RESET
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--ink);
  background: var(--surface-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
:focus-visible { outline: 3px solid var(--ciano); outline-offset: 3px; border-radius: 4px; }

/* --------------------------------------------------------------------------
   3. TIPOGRAFIA
   -------------------------------------------------------------------------- */
.display, h1, h2, h3 {
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.035em; /* tracking negativo: densidade e sofisticação */
  text-wrap: balance;
}
.display { font-size: var(--fs-display); }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); font-weight: 600; letter-spacing: -0.02em; line-height: 1.2; }

.lead {
  font-size: var(--fs-lead);
  font-weight: 400;
  line-height: 1.55;
  color: var(--ink-muted);
  text-wrap: pretty;
}
.on-dark .lead, .lead.on-dark { color: var(--ink-on-dark-muted); }

/* DM Mono = pontuação, não estrutura. Labels, eyebrows, tags, IDs e dados. */
.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
}
.mono-data {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ciano);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
}
.eyebrow::before {
  content: "";
  width: 22px; height: 2px;
  background: currentColor;
  border-radius: var(--r-pill);
  flex: none;
}
.eyebrow--ink { color: var(--ciano--250); }

.hl { color: var(--ciano); }
.hl-citrico { color: var(--citrico); }
.hl-coral { color: var(--coral); }

/* --------------------------------------------------------------------------
   4. LAYOUT
   -------------------------------------------------------------------------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container--narrow { max-width: var(--container-narrow); }

.section { padding-block: clamp(3.5rem, 7vw, var(--sp-10)); position: relative; }
.section--tight { padding-block: clamp(2.5rem, 5vw, var(--sp-8)); }

.section--dark   { background: var(--surface-dark); color: var(--ink-on-dark); }
.section--darker { background: var(--azul-025);     color: var(--ink-on-dark); }
.section--light  { background: var(--surface-light); }
.section--white  { background: var(--surface-white); }

.section-head { max-width: 720px; margin-bottom: clamp(2rem, 4vw, var(--sp-7)); }
.section-head > * + * { margin-top: var(--sp-4); }

.grid { display: grid; gap: clamp(1rem, 2.5vw, var(--sp-5)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); }

/* --------------------------------------------------------------------------
   5. GRAFISMOS
   Line waves: apenas sobre fundo escuro, opacidade máx. 50%, cor inalterada.
   -------------------------------------------------------------------------- */
.gfx { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.gfx > * { position: absolute; }
.gfx-waves {
  inset: 0;
  background-image: url("waves.svg");
  background-size: clamp(900px, 105vw, 1700px) auto;
  background-position: right -120px top -60px;
  background-repeat: no-repeat;
  opacity: .42;                     /* manual: máximo de 50% */
  /* O grafismo desaparece onde o texto vive: a informação é o centro. */
  -webkit-mask-image: linear-gradient(100deg, transparent 18%, #000 62%);
  mask-image: linear-gradient(100deg, transparent 18%, #000 62%);
}
/* Variante para seções de duas colunas (texto à esquerda, card à direita):
   o grafismo fica ancorado à direita e apaga cedo, para nunca cruzar o texto. */
.gfx-waves--soft {
  background-position: right -140px bottom -180px;
  opacity: .26;
  -webkit-mask-image: linear-gradient(100deg, transparent 40%, #000 88%);
  mask-image: linear-gradient(100deg, transparent 40%, #000 88%);
}

/* O "C" da marca como forma de apoio. Vive atrás do conteúdo, nunca disputa. */
@media (max-width: 780px) {
  .gfx-waves { opacity: .24; background-size: 1000px auto; }
}

.gfx-c {
  width: 40vw; max-width: 520px; aspect-ratio: 1;
  border-radius: 50%;
  border: clamp(48px, 9vw, 120px) solid currentColor;
  clip-path: polygon(0 0, 55% 0, 55% 26%, 26% 26%, 26% 74%, 55% 74%, 55% 100%, 0 100%);
  opacity: .07;
}

/* Conteúdo sobe uma camada; o grafismo continua atrás e absoluto. */
.has-gfx > *:not(.gfx) { position: relative; z-index: 1; }

/* --------------------------------------------------------------------------
   6. BOTÕES
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-3);
  padding: 0.95rem 1.7rem;
  border: 2px solid transparent;
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .15s var(--ease);
  text-align: center;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary { background: var(--ciano); color: var(--azul-profundo); }
.btn--primary:hover { background: var(--ciano-250); }

.btn--ghost-light { border-color: var(--line-dark); color: var(--nuvem); }
.btn--ghost-light:hover { border-color: var(--ciano); color: var(--ciano); }

.btn--ghost-dark { border-color: rgba(10,1,68,.2); color: var(--azul-profundo); }
.btn--ghost-dark:hover { border-color: var(--azul-profundo); background: var(--azul-profundo); color: var(--nuvem); }

.btn--solid-dark { background: var(--azul-profundo); color: var(--nuvem); }
.btn--solid-dark:hover { background: var(--azul-125); }

.btn--block { width: 100%; }
.btn--lg { padding: 1.15rem 2rem; font-size: 1.05rem; }

/* --------------------------------------------------------------------------
   7. CARDS E SUPERFÍCIES
   -------------------------------------------------------------------------- */
.card {
  border-radius: var(--r-lg);
  padding: clamp(1.5rem, 2.5vw, 2rem);
  background: var(--surface-white);
  border: 1px solid var(--line-light);
  box-shadow: var(--shadow-card);
}
.card--dark {
  background: var(--surface-elev);
  border-color: var(--line-dark);
  box-shadow: none;
  color: var(--ink-on-dark);
}
.card--flat { box-shadow: none; }
.card--outline-dark { background: transparent; border: 1px solid var(--line-dark); box-shadow: none; }

.card > * + * { margin-top: var(--sp-3); }
.card p { color: var(--ink-muted); font-size: var(--fs-sm); }
.card--dark p, .card--outline-dark p { color: var(--ink-on-dark-muted); }

/* Chip / tag */
.chip {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: 0.4rem 0.85rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ciano);
}
.chip--ink { border-color: var(--line-light); color: var(--ciano--250); }

/* --------------------------------------------------------------------------
   8. FORMULÁRIO
   -------------------------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-on-dark);
}
.field .req { color: var(--ciano); }

.field input, .field select, .field textarea {
  width: 100%;
  padding: 0.8rem 0.95rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-dark);
  background: rgba(238,240,248,.06);
  color: var(--nuvem);
  font-size: 0.95rem;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
  appearance: none;
}
.field input::placeholder, .field textarea::placeholder { color: rgba(168,176,214,.6); }
.field input:hover, .field select:hover, .field textarea:hover { border-color: rgba(238,240,248,.3); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--ciano);
  background: rgba(6,182,212,.08);
}
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2306B6D4' stroke-width='1.75' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  background-size: 12px;
  padding-right: 2.4rem;
}
.field select option { background: var(--azul-profundo); color: var(--nuvem); }

.field-error { font-size: var(--fs-xs); color: var(--coral); display: none; }
.field.is-invalid input, .field.is-invalid select { border-color: var(--coral); }
.field.is-invalid .field-error { display: block; }

.form-consent {
  display: flex; gap: 0.6rem; align-items: flex-start;
  font-size: var(--fs-xs); line-height: 1.5;
  color: var(--ink-on-dark-muted);
}
.form-consent input[type="checkbox"] {
  width: 17px; height: 17px; flex: none; margin-top: 2px;
  accent-color: var(--ciano); cursor: pointer;
}

/* --------------------------------------------------------------------------
   9. UTILITÁRIOS
   -------------------------------------------------------------------------- */
.stack > * + * { margin-top: var(--sp-4); }
.stack-sm > * + * { margin-top: var(--sp-2); }
.stack-lg > * + * { margin-top: var(--sp-6); }
.center { text-align: center; }
.center-x { margin-inline: auto; }
.muted { color: var(--ink-muted); }
.on-dark .muted { color: var(--ink-on-dark-muted); }
.nowrap { white-space: nowrap; }
.hide-sm { display: none; }
@media (min-width: 900px) { .hide-sm { display: revert; } .hide-lg { display: none; } }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Marcador de dado pendente de validação interna */
.todo {
  border-bottom: 1px dashed var(--citrico);
  color: inherit;
}

/* Revelação em scroll — só entra em cena se o JS estiver ativo.
   Sem JS, o conteúdo aparece normalmente em vez de ficar invisível. */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; } }