/* ==========================================================================
   Orbita Design System — tokens extraídos de orbita.zapsign.io (Storybook)
   Tema para agents.zapsign.com.br
   ========================================================================== */

:root {
  /* Brand */
  --color-brand-600: #1f5ef4;
  --color-background-brand-solid-primary: #1f5ef4;
  --color-background-brand-solid-hover: #1250b2;
  --color-background-brand-subtle-primary: #edf1fc;
  --color-background-brand-subtle-secondary: #d9e1f6;
  --color-background-brand-subtle-hover: #becff7;
  --color-border-brand-solid: #1f5ef4;
  --color-border-brand-subtle: #becff7;
  --color-text-brand: #1f5ef4;

  /* Neutrals */
  --color-background-primary: #ffffff;
  --color-background-secondary: #f5f7fa;
  --color-background-hover: #e1e4ea;
  --color-background-inverse-primary: #222530;
  --color-text-primary: #282828;
  --color-text-secondary: #5c5c5c;
  --color-text-disabled: #a3a3a3;
  --color-text-inverse: #ffffff;
  --color-border-primary: #cacfd8;
  --color-border-secondary: #e1e4ea;
  --color-black: #1c1c1c;

  /* Semantic */
  --color-success: #2b9e69;
  --color-text-success: #1c7f53;
  --color-bg-success-subtle: #effaf4;
  --color-border-success-subtle: #b3e7c8;
  --color-warning: #c8862a;
  --color-text-warning: #a96521;
  --color-bg-warning-subtle: #fbf6eb;
  --color-border-warning-subtle: #edd59b;
  --color-info: #006fcb;
  --color-bg-info-subtle: #f0f7ff;
  --color-border-info-subtle: #b9dffe;
  --color-danger: #d7263d;
  --color-bg-danger-subtle: #fef2f2;

  /* Typography */
  --font-sans: "Figtree", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Radius */
  --radius-control: 10px;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;

  /* Spacing base */
  --spacing: 0.25rem;

  /* Shadow */
  --shadow-card: 0 1px 2px rgba(28, 28, 28, 0.05);
  --shadow-card-hover: 0 4px 16px rgba(31, 94, 244, 0.10);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 26px;
  color: var(--color-text-primary);
  background: var(--color-background-primary);
  -webkit-font-smoothing: antialiased;
}

/* Typography scale (Orbita) */
h1 { font-size: 40px; line-height: 48px; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 16px; }
h2 { font-size: 32px; line-height: 40px; font-weight: 600; letter-spacing: -0.005em; margin: 0 0 12px; }
h3 { font-size: 24px; line-height: 32px; font-weight: 600; letter-spacing: -0.005em; margin: 0 0 8px; }
h4 { font-size: 20px; line-height: 28px; font-weight: 600; margin: 0 0 8px; }
p  { margin: 0 0 16px; }

a { color: var(--color-text-brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-secondary);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--color-text-primary); flex-shrink: 0; }
.brand:hover { text-decoration: none; }
.brand-logo { height: 32px; width: auto; display: block; }
.brand .brand-sub {
  color: var(--color-text-brand); font-weight: 600; font-size: 14px; line-height: 16px;
  background: var(--color-background-brand-subtle-primary);
  border: 1px solid var(--color-border-brand-subtle);
  border-radius: 999px; padding: 3px 10px;
}
.site-nav { display: flex; align-items: center; gap: 24px; }
.site-nav a { color: var(--color-text-secondary); font-size: 14px; font-weight: 500; }
.site-nav a:hover { color: var(--color-text-primary); text-decoration: none; }

/* Mobile nav toggle (CSS-only) */
.nav-toggle { display: none; }
.nav-toggle-btn { display: none; }

/* ===== Buttons (Orbita) ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 20px;
  border-radius: var(--radius-control);
  font-family: var(--font-sans); font-size: 16px; font-weight: 500; line-height: 16px;
  cursor: pointer; border: 1px solid transparent; text-decoration: none;
  transition: background-color .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--color-background-brand-solid-primary); color: var(--color-text-inverse); }
.btn-primary:hover { background: var(--color-background-brand-solid-hover); }
.btn-secondary {
  background: var(--color-background-primary); color: var(--color-text-primary);
  border-color: var(--color-border-primary);
}
.btn-secondary:hover { background: var(--color-background-secondary); }
.btn-subtle { background: var(--color-background-brand-subtle-primary); color: var(--color-text-brand); }
.btn-subtle:hover { background: var(--color-background-brand-subtle-secondary); }
.btn-sm { height: 36px; padding: 0 14px; font-size: 14px; line-height: 14px; }

/* ===== Badges ===== */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 999px;
  font-size: 12px; line-height: 16px; font-weight: 500; letter-spacing: 0.01em;
}
.badge-brand { background: var(--color-background-brand-subtle-primary); color: var(--color-text-brand); border: 1px solid var(--color-border-brand-subtle); }
.badge-success { background: var(--color-bg-success-subtle); color: var(--color-text-success); border: 1px solid var(--color-border-success-subtle); }
.badge-neutral { background: var(--color-background-secondary); color: var(--color-text-secondary); border: 1px solid var(--color-border-secondary); }

/* ===== Hero ===== */
.hero { padding: 80px 0 64px; background:
  radial-gradient(1200px 500px at 80% -10%, var(--color-background-brand-subtle-primary) 0%, transparent 60%),
  var(--color-background-primary);
}
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: 48px; line-height: 56px; }
.hero .lead { font-size: 20px; line-height: 32px; color: var(--color-text-secondary); margin-bottom: 32px; }
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .badge { margin-bottom: 20px; }

/* ===== Code blocks ===== */
.code-card {
  background: var(--color-background-inverse-primary);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(34, 37, 48, 0.18);
}
.code-card-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; background: rgba(255, 255, 255, 0.06);
  color: #a9b0c2; font-size: 12px; font-family: var(--font-mono);
}
pre {
  margin: 0; padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono); font-size: 13px; line-height: 21px;
  color: #e6e9f0;
}
pre .c { color: #7d879e; }   /* comment */
pre .k { color: #8ab4ff; }   /* key / keyword */
pre .s { color: #7ee2a8; }   /* string */
pre .n { color: #ffce85; }   /* number/flag */
code.inline {
  font-family: var(--font-mono); font-size: 0.875em;
  background: var(--color-background-secondary);
  border: 1px solid var(--color-border-secondary);
  border-radius: var(--radius-md);
  padding: 1px 6px;
  overflow-wrap: anywhere;
}

/* ===== Sections ===== */
.section { padding: 72px 0; }
.section-alt { background: var(--color-background-secondary); }
.section-head { max-width: 720px; margin-bottom: 40px; }
.section-head .kicker {
  color: var(--color-text-brand); font-weight: 600; font-size: 14px;
  letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 8px;
}
.section-head p { color: var(--color-text-secondary); font-size: 18px; line-height: 28px; }

/* ===== Cards ===== */
.card-grid { display: grid; gap: 20px; }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--color-background-primary);
  border: 1px solid var(--color-border-secondary);
  border-radius: var(--radius-2xl);
  padding: 28px;
  box-shadow: var(--shadow-card);
  display: flex; flex-direction: column;
  transition: box-shadow .15s ease, border-color .15s ease, transform .15s ease;
}
a.card { color: inherit; }
a.card:hover {
  text-decoration: none;
  border-color: var(--color-border-brand-subtle);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.card h3, .card h4 { margin-bottom: 8px; }
.card p { color: var(--color-text-secondary); font-size: 15px; line-height: 24px; margin-bottom: 0; }
.card .card-cta { margin-top: 16px; color: var(--color-text-brand); font-weight: 500; font-size: 14px; }
.card-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--color-background-brand-subtle-primary);
  color: var(--color-text-brand);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700;
  margin-bottom: 16px;
}
.card-meta { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }

/* ===== Steps ===== */
.steps { counter-reset: step; display: grid; gap: 0; }
.step {
  position: relative; padding: 0 0 40px 56px;
  border-left: 0;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--color-background-brand-subtle-primary);
  color: var(--color-text-brand);
  border: 1px solid var(--color-border-brand-subtle);
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 15px;
}
.step::after {
  content: ""; position: absolute; left: 17px; top: 44px; bottom: 8px;
  width: 2px; background: var(--color-border-secondary);
}
.step:last-child::after { display: none; }
.step h3 { font-size: 20px; line-height: 28px; padding-top: 4px; }
.step p { color: var(--color-text-secondary); }
.step .code-card { margin: 16px 0; }

/* ===== Callouts ===== */
.callout {
  border-radius: var(--radius-xl);
  padding: 16px 20px;
  font-size: 15px; line-height: 24px;
  margin: 20px 0;
  border: 1px solid;
}
.callout p { margin: 0; }
.callout strong { display: block; margin-bottom: 2px; }
.callout-info { background: var(--color-bg-info-subtle); border-color: var(--color-border-info-subtle); color: #084c7c; }
.callout-success { background: var(--color-bg-success-subtle); border-color: var(--color-border-success-subtle); color: var(--color-text-success); }
.callout-warning { background: var(--color-bg-warning-subtle); border-color: var(--color-border-warning-subtle); color: var(--color-text-warning); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--color-text-secondary);
  padding: 24px 0 0;
}
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-text-brand); }
.breadcrumb .sep { color: var(--color-text-disabled); }
.breadcrumb .current { color: var(--color-text-primary); font-weight: 500; }

/* ===== Article (tutorial) ===== */
.article { padding: 24px 0 80px; }
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 56px; }
.article-header { margin: 16px 0 40px; }
.article-header h1 { font-size: 40px; line-height: 48px; }
.article-header .lead { font-size: 18px; line-height: 28px; color: var(--color-text-secondary); }
.article-header .card-meta { margin-top: 20px; }
.article-body h2 { margin-top: 48px; scroll-margin-top: 88px; }
.article-body ul, .article-body ol { color: var(--color-text-secondary); padding-left: 24px; margin: 0 0 16px; }
.article-body li { margin-bottom: 6px; }
.article-body .code-card { margin: 20px 0; }

/* TOC sidebar */
.toc {
  position: sticky; top: 88px; align-self: start;
  border-left: 2px solid var(--color-border-secondary);
  padding-left: 20px; font-size: 14px;
}
.toc .toc-title { font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-secondary); margin-bottom: 12px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin-bottom: 10px; }
.toc a { color: var(--color-text-secondary); }
.toc a:hover { color: var(--color-text-brand); text-decoration: none; }

/* ===== Tables ===== */
table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 20px 0; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--color-border-secondary); }
th { font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-secondary); background: var(--color-background-secondary); }
td { color: var(--color-text-secondary); }
td:first-child { color: var(--color-text-primary); font-weight: 500; }

/* ===== FAQ ===== */
.faq-list { display: grid; gap: 12px; max-width: 840px; }
details.faq {
  background: var(--color-background-primary);
  border: 1px solid var(--color-border-secondary);
  border-radius: var(--radius-xl);
  padding: 0;
}
details.faq summary {
  cursor: pointer; padding: 18px 24px;
  font-weight: 500; font-size: 16px;
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; color: var(--color-text-brand); font-size: 20px; font-weight: 400; }
details.faq[open] summary::after { content: "–"; }
details.faq .faq-body { padding: 0 24px 20px; color: var(--color-text-secondary); font-size: 15px; line-height: 24px; }
details.faq .faq-body p { margin-bottom: 8px; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-background-inverse-primary);
  color: #a9b0c2; padding: 56px 0 32px; margin-top: 0;
  font-size: 14px; line-height: 22px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.site-footer h4 { color: #fff; font-size: 14px; margin-bottom: 16px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { color: #a9b0c2; }
.site-footer a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.site-footer .brand { color: #fff; margin-bottom: 12px; }
.site-footer .brand-logo { filter: brightness(0) invert(1); opacity: 0.95; }
.site-footer .brand-sub { color: #8ab4ff; background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.18); }

/* ===== Overflow safety ===== */
img { max-width: 100%; }
.hero-grid > *, .card-grid > *, .article-grid > *, .steps > * { min-width: 0; }
.article-body, .step { min-width: 0; max-width: 100%; }
pre { max-width: 100%; }
.table-scroll { overflow-x: auto; }

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 36px; line-height: 44px; }
  .card-grid-3 { grid-template-columns: 1fr 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .toc { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-header h1 { font-size: 32px; line-height: 40px; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }

  /* Menu hamburger */
  .nav-toggle-btn {
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
    width: 42px; height: 42px; cursor: pointer;
    border: 1px solid var(--color-border-secondary); border-radius: var(--radius-control);
    background: var(--color-background-primary);
  }
  .nav-toggle-btn span {
    display: block; width: 18px; height: 2px; border-radius: 2px;
    background: var(--color-text-primary);
    transition: transform .2s ease, opacity .2s ease;
  }
  .site-nav {
    display: none;
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--color-background-primary);
    border-bottom: 1px solid var(--color-border-secondary);
    padding: 8px 20px 20px;
    box-shadow: 0 16px 32px rgba(28, 28, 28, 0.08);
  }
  .site-nav a { padding: 14px 4px; font-size: 16px; border-bottom: 1px solid var(--color-background-secondary); }
  .site-nav a.btn { margin-top: 16px; padding: 0 20px; border-bottom: none; font-size: 15px; }
  .nav-toggle:checked ~ .site-nav { display: flex; }
  .nav-toggle:checked ~ .nav-toggle-btn span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-toggle-btn span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-toggle-btn span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* Tabelas roláveis */
  .article-body table, .section table { display: block; overflow-x: auto; }
  th, td { padding: 10px 12px; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .card-grid-3, .card-grid-2 { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 36px; }
  .hero h1 { font-size: 31px; line-height: 39px; }
  .hero .lead { font-size: 17px; line-height: 27px; }
  .hero-ctas .btn { flex: 1 1 100%; }
  h2 { font-size: 26px; line-height: 34px; }
  .section { padding: 48px 0; }
  .section-head p { font-size: 16px; line-height: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .article-header h1 { font-size: 27px; line-height: 35px; }
  .article-header .lead { font-size: 16px; line-height: 26px; }
  .breadcrumb { flex-wrap: wrap; row-gap: 4px; }
  .step { padding-left: 48px; padding-bottom: 32px; }
  .step::before { width: 32px; height: 32px; font-size: 14px; }
  .step::after { left: 15px; top: 40px; }
  .card { padding: 20px; }
  pre { padding: 16px; font-size: 12px; line-height: 19px; }
  .faq-list details.faq summary { padding: 16px 18px; font-size: 15px; }
  details.faq .faq-body { padding: 0 18px 16px; }
  .brand-logo { height: 28px; }
  .brand .brand-sub { font-size: 12px; padding: 2px 8px; }
}

@media (max-width: 380px) {
  .brand .brand-sub { display: none; }
}