:root {
  --bg: #080b10;
  --text: #e9ecf2;
  --text-secondary: #9aa3b5;
  --text-muted: #6d7688;
  --amber: #e09a52;
  --amber-soft: rgba(224, 154, 82, 0.12);
  --teal: #4ec4a8;
  --teal-soft: rgba(78, 196, 168, 0.1);
  --border: rgba(255, 255, 255, 0.09);
  --header-height: 56px;
  --read-width: 680px;
  --font-sans: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 10px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: 8px 16px;
  background: var(--teal);
  color: #041510;
  font-weight: 600;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
}

a {
  color: var(--amber);
}

code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  padding: 2px 6px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(8, 11, 16, 0.94);
  backdrop-filter: blur(8px);
}

.site-header-inner {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.brand:hover {
  color: var(--teal);
  text-decoration: none;
}

.brand-mark {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  cursor: pointer;
}

.nav-toggle-bar {
  width: 14px;
  height: 2px;
  background: currentColor;
  display: block;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.site-nav a {
  font-size: 0.84rem;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 6px;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--text);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.04);
}

.site-nav a.is-active {
  color: var(--teal);
}

.nav-cta {
  color: var(--teal) !important;
  font-weight: 600;
}

/* Main / guide */
.site-main {
  max-width: var(--read-width);
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.guide-intro {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin: 0 0 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.guide-toc {
  margin: 0 0 48px;
  padding: 20px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.guide-toc ol {
  margin: 0;
  padding-left: 1.25rem;
}

.guide-toc li {
  margin: 6px 0;
}

.guide-toc a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
}

.guide-toc a:hover,
.guide-toc a.is-active {
  color: var(--teal);
}

.chapter {
  margin-bottom: 56px;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.chapter h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 20px;
  line-height: 1.3;
}

.chapter h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 28px 0 10px;
}

.chapter p,
.chapter li {
  color: var(--text-secondary);
  margin: 0 0 14px;
}

.chapter ul,
.chapter ol {
  margin: 0 0 16px;
  padding-left: 1.35rem;
  color: var(--text-secondary);
}

.chapter li {
  margin-bottom: 8px;
}

.callout-important {
  margin: 24px 0;
  padding: 20px 22px;
  background: var(--amber-soft);
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.callout-important p,
.callout-important li {
  color: var(--text);
  font-size: 0.95rem;
}

.note {
  margin: 18px 0 0;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--teal);
  border-radius: 0 8px 8px 0;
  background: rgba(255, 255, 255, 0.02);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.note strong {
  color: var(--text);
}

.note-success {
  background: var(--teal-soft);
  border-left-color: var(--teal);
  color: var(--text);
  font-size: 0.95rem;
}

.scenario-writeup {
  margin: 28px 0;
  padding: 20px 0;
  border-top: 1px solid var(--border);
}

.scenario-writeup:first-of-type {
  border-top: none;
  padding-top: 0;
}

.scenario-writeup h3 {
  margin-top: 0;
}

.phrase-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--teal);
  margin: 16px 0 8px !important;
}

blockquote {
  margin: 0 0 14px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--teal);
  border-radius: 0 8px 8px 0;
  color: var(--text);
  font-size: 0.95rem;
}

/* Demo */
.demo-stage {
  margin-top: 16px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.02);
}

.demo-meta {
  margin-bottom: 16px;
}

.demo-caption {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--teal);
  margin: 0 0 8px;
}

.demo-explainer {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin: 0;
}

.conversation-panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.35);
  overflow: hidden;
}

.conversation-label {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.conversation-body {
  padding: 16px 14px;
  height: 360px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.conversation-placeholder {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

.msg {
  font-size: 0.9rem;
  line-height: 1.5;
  padding: 10px 12px;
  border-radius: 10px;
  max-width: 96%;
}

.msg-who {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
}

.msg-user {
  align-self: flex-end;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
}

.msg-system {
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-align: center;
  padding: 8px 14px;
  border: 1px dashed var(--border);
  background: transparent;
}

.msg-tool {
  align-self: flex-start;
  max-width: 96%;
}

.msg-tool-badge {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--teal);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.msg-tool-text {
  padding: 10px 12px;
  background: var(--teal-soft);
  border: 1px solid rgba(78, 196, 168, 0.25);
  border-radius: 10px;
  color: var(--text);
  font-size: 0.88rem;
}

.demo-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.demo-status {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.88rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--teal);
  color: #041510;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
}

.btn-sm {
  padding: 6px 16px;
  font-size: 0.78rem;
}

.btn.is-loading {
  cursor: default;
  opacity: 0.75;
  padding-left: 40px;
  position: relative;
}

.btn.is-loading::before {
  content: "";
  position: absolute;
  left: 16px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(4, 21, 16, 0.3);
  border-top-color: #041510;
  animation: btn-spin 0.7s linear infinite;
}

@keyframes btn-spin {
  to {
    transform: rotate(360deg);
  }
}

.callout-success {
  margin: 24px 0;
  padding: 20px 22px;
  background: var(--teal-soft);
  border-left: 3px solid var(--teal);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.callout-success p {
  color: var(--text);
  font-size: 0.95rem;
  margin: 0;
}

.callout-success .credential-details {
  margin-top: 16px;
}

.credential-details {
  margin: 0;
}

.credential-row {
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.credential-row:first-child {
  border-top: none;
}

.credential-row dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.credential-row dd {
  margin: 0;
  word-break: break-all;
  color: var(--text);
}

.credential-row code {
  font-size: 0.88rem;
}

.credential-details + .btn-sm {
  margin-top: 14px;
  margin-bottom: 20px;
}

.contact-form {
  margin-top: 20px;
  max-width: 420px;
}

.form-field {
  margin-bottom: 16px;
}

.form-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-field input {
  width: 100%;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.92rem;
}

.form-field input:focus {
  outline: none;
  border-color: var(--teal);
}

.field-validation-error {
  display: block;
  margin-top: 6px;
  font-size: 0.8rem;
  color: var(--amber);
}

.validation-summary-errors ul {
  margin: 0 0 16px;
  padding-left: 1.1rem;
  color: var(--amber);
  font-size: 0.88rem;
}

.form-status {
  margin: 0 0 16px;
  color: var(--amber);
  font-size: 0.88rem;
}

[hidden] {
  display: none !important;
}

/* Modal */
body.modal-open {
  overflow: hidden;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 220;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5, 7, 10, 0.72);
  backdrop-filter: blur(2px);
}

.loading-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.loading-box p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--teal);
  animation: btn-spin 0.7s linear infinite;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(5, 7, 10, 0.72);
  backdrop-filter: blur(2px);
}

.modal-box {
  position: relative;
  max-width: 420px;
  width: 100%;
  padding: 28px 26px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-box h2 {
  font-size: 1.15rem;
  margin: 0 0 10px;
}

.modal-box p {
  color: var(--text-secondary);
  margin: 0 0 20px;
  font-size: 0.94rem;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 24px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.site-footer p {
  margin: 0;
}

/* Tech doc page */
.doc-page {
  padding: 32px 0 64px;
}

.doc-page .back-link {
  display: flex;
  width: fit-content;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  text-decoration: none;
}

.doc-page h1 {
  font-size: 1.65rem;
  margin-bottom: 20px;
}

.doc-page h2 {
  font-size: 1.1rem;
  margin-top: 36px;
}

.doc-page p,
.doc-page li {
  color: var(--text-secondary);
}

.doc-meta {
  margin: 20px 0 28px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.88rem;
}

.doc-meta > div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 8px;
  margin-bottom: 6px;
}

.doc-meta dt {
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.doc-meta dd {
  margin: 0;
  color: var(--text-secondary);
}

.arch-diagram {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0;
  font-size: 0.85rem;
}

.arch-group {
  flex: 1;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.arch-group-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.arch-box {
  margin-top: 6px;
  font-size: 0.85rem;
}

.arch-box small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.arch-link {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--teal);
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: 12px 0;
}

.doc-table th,
.doc-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 12px 16px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    display: none;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* Hero */
.hero {
  padding: 4px 0 36px;
}

.hero .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 16px;
}

.hero h1 {
  font-size: clamp(28px, 4.5vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  max-width: 17ch;
  font-weight: 700;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 62ch;
  margin: 0;
}

.hero-audience {
  font-size: 0.92rem;
  color: var(--text-muted);
  max-width: 60ch;
  margin: 14px 0 0;
}

.hero-cta {
  margin-top: 22px;
}

/* Comparação lado a lado */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 4px;
}

.compare-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent 60%);
  padding: 22px;
}

.compare-card > span {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 14px;
}

.compare-card h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
}

@media (max-width: 700px) {
  .compare-grid {
    grid-template-columns: 1fr;
  }
}