/**
 * CheckSEO360 — Estilo global
 * Paleta: azul escuro, teal, branco, cinza claro. Sem frameworks.
 */

:root {
  --color-bg-deep: #0a1628;
  --color-bg-card: #111f36;
  --color-bg-elevated: #152a45;
  --color-teal: #2dd4bf;
  --color-teal-dim: #14b8a6;
  --color-teal-glow: rgba(45, 212, 191, 0.35);
  --color-white: #f8fafc;
  --color-muted: #94a3b8;
  --color-border: rgba(148, 163, 184, 0.18);
  --color-accent-line: linear-gradient(90deg, var(--color-teal), #38bdf8);
  --font-sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Roboto", sans-serif;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 18px 50px rgba(0, 0, 0, 0.35);
  --shadow-soft: 0 8px 30px rgba(15, 23, 42, 0.25);
  --header-h: 64px;
  --sidebar-w: 268px;
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-white);
  background: var(--color-bg-deep);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Fundo sutil em grade + gradiente */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(45, 212, 191, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(56, 189, 248, 0.08), transparent),
    linear-gradient(180deg, var(--color-bg-deep) 0%, #0d1a30 100%);
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black, transparent);
  z-index: -1;
}

a {
  color: var(--color-teal);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

a:hover {
  color: #5eead4;
}

img {
  max-width: 100%;
  height: auto;
}

/* ——— Layout app ——— */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--color-white);
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-accent-line);
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--color-bg-deep);
  box-shadow: 0 0 24px var(--color-teal-glow);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  color: var(--color-white);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
}

.nav-toggle:hover {
  background: var(--color-bg-card);
  border-color: rgba(45, 212, 191, 0.35);
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: var(--header-h);
  left: 0;
  width: var(--sidebar-w);
  height: calc(100vh - var(--header-h));
  background: rgba(17, 31, 54, 0.92);
  border-right: 1px solid var(--color-border);
  padding: 1.25rem 0.9rem 2rem;
  overflow-y: auto;
  z-index: 90;
  transition: transform var(--transition), box-shadow var(--transition);
}

.sidebar-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-muted);
  padding: 0 0.75rem 0.5rem;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--color-muted);
  font-size: 0.92rem;
  transition: background var(--transition), color var(--transition), transform 0.2s ease;
}

.nav-list a:hover {
  color: var(--color-white);
  background: rgba(45, 212, 191, 0.08);
}

.nav-list a.is-active {
  color: var(--color-teal);
  background: rgba(45, 212, 191, 0.12);
  font-weight: 600;
}

.nav-list a .nav-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-border);
  flex-shrink: 0;
}

.nav-list a.is-active .nav-dot {
  background: var(--color-teal);
  box-shadow: 0 0 10px var(--color-teal-glow);
}

.sidebar-progress {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.sidebar-progress p {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* Main */
.main-wrap {
  flex: 1;
  margin-left: var(--sidebar-w);
  margin-top: var(--header-h);
  padding: 2rem 1.5rem 3.5rem;
  max-width: 920px;
}

.main-wrap--wide {
  max-width: 1120px;
}

/* Homepage sem sidebar offset no mobile pode usar full - handled in media */

/* ——— Tipografia ——— */
h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(1.85rem, 4vw, 2.45rem);
  margin: 0 0 1rem;
}

h2 {
  font-size: clamp(1.35rem, 2.5vw, 1.65rem);
  margin: 2.5rem 0 1rem;
}

h3 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
}

.lead {
  font-size: 1.1rem;
  color: var(--color-muted);
  margin: 0 0 1.5rem;
  max-width: 52ch;
}

/* ——— Botões ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow var(--transition), background var(--transition);
  font-family: inherit;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-accent-line);
  color: var(--color-bg-deep);
  box-shadow: 0 8px 28px var(--color-teal-glow);
}

.btn-primary:hover {
  box-shadow: 0 12px 36px rgba(45, 212, 191, 0.45);
}

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

.btn-ghost:hover {
  border-color: rgba(45, 212, 191, 0.45);
  background: rgba(45, 212, 191, 0.06);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ——— Progress ——— */
.progress-block {
  margin: 1rem 0 0;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0.35rem;
}

.progress-label strong {
  color: var(--color-teal);
  font-weight: 700;
}

.progress-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--color-accent-line);
  box-shadow: 0 0 20px var(--color-teal-glow);
  transition: width 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ——— Cards ——— */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.card-link {
  display: block;
  padding: 1.35rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.card-link::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent-line);
  opacity: 0;
  transition: opacity var(--transition);
}

.card-link:hover {
  transform: translateY(-4px);
  border-color: rgba(45, 212, 191, 0.35);
  box-shadow: var(--shadow-card);
}

.card-link:hover::before {
  opacity: 1;
}

.card-link h3 {
  margin: 0 0 0.35rem;
  color: var(--color-white);
  font-size: 1.05rem;
}

.card-link p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.card-link .card-meta {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--color-teal);
}

.mini-progress {
  flex: 1;
  max-width: 120px;
  height: 6px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.15);
  margin-left: 0.75rem;
  overflow: hidden;
}

.mini-progress span {
  display: block;
  height: 100%;
  background: var(--color-teal);
  border-radius: 999px;
  transition: width 0.5s ease;
}

/* Info cards homepage */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.info-card {
  padding: 1.25rem;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.info-card h3 {
  color: var(--color-teal);
  font-size: 1rem;
}

.info-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* ——— Checklist item cards ——— */
.checklist {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.check-item {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), transform 0.35s ease;
}

.check-item.is-done {
  border-color: rgba(45, 212, 191, 0.45);
  box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.15), var(--shadow-soft);
}

.check-item.is-done .check-head {
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.12), transparent);
}

.check-item.is-animating {
  animation: pulseDone 0.55s ease;
}

@keyframes pulseDone {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.01);
    box-shadow: 0 0 0 6px rgba(45, 212, 191, 0.12);
  }
  100% {
    transform: scale(1);
  }
}

.check-head {
  padding: 1.15rem 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.check-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  flex-shrink: 0;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform 0.2s ease;
  background: var(--color-bg-elevated);
}

.check-icon:hover {
  border-color: rgba(45, 212, 191, 0.5);
}

.check-item.is-done .check-icon {
  background: rgba(45, 212, 191, 0.2);
  border-color: var(--color-teal);
  color: var(--color-teal);
}

.check-icon svg {
  width: 22px;
  height: 22px;
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.25s ease, transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.check-item.is-done .check-icon svg {
  opacity: 1;
  transform: scale(1);
}

.check-title-wrap {
  flex: 1;
  min-width: 0;
}

.check-title {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-white);
}

.check-badge {
  display: inline-block;
  margin-top: 0.35rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-teal-dim);
  background: rgba(45, 212, 191, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
}

.btn-toggle-detail {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: color var(--transition), border-color var(--transition), transform 0.3s ease;
}

.btn-toggle-detail[aria-expanded="true"] {
  transform: rotate(180deg);
  color: var(--color-teal);
  border-color: rgba(45, 212, 191, 0.35);
}

.check-body {
  padding: 0 1.25rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease, padding 0.45s ease;
}

.check-item.is-open .check-body {
  padding: 1rem 1.25rem 1.25rem;
  max-height: 1200px;
}

.check-section {
  margin-bottom: 1rem;
}

.check-section:last-child {
  margin-bottom: 0;
}

.check-section h4 {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
}

.check-section p,
.check-section ol {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.check-section ol {
  padding-left: 1.2rem;
}

.check-section ol li {
  margin-bottom: 0.35rem;
}

.code-sample {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.8rem;
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: #cbd5e1;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.check-actions {
  padding: 0 1.25rem 1.25rem;
}

.btn-complete {
  width: 100%;
  padding: 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(45, 212, 191, 0.35);
  background: rgba(45, 212, 191, 0.1);
  color: var(--color-teal);
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition), color var(--transition), transform 0.2s ease;
}

.btn-complete:hover {
  background: rgba(45, 212, 191, 0.2);
}

.check-item.is-done .btn-complete {
  background: rgba(45, 212, 191, 0.25);
  color: var(--color-white);
  border-color: var(--color-teal);
}

/* ——— Hero homepage ——— */
.hero {
  padding: 2.5rem 0 3rem;
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-teal);
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.25);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.hero h1 {
  max-width: 18ch;
}

@media (min-width: 768px) {
  .hero h1 {
    max-width: 22ch;
  }
}

.hero-visual {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  text-align: center;
}

.hero-stats div strong {
  display: block;
  font-size: 1.65rem;
  color: var(--color-teal);
  font-variant-numeric: tabular-nums;
}

.hero-stats div span {
  font-size: 0.78rem;
  color: var(--color-muted);
}

/* ——— CTA final ——— */
.cta-band {
  margin-top: 3rem;
  padding: 2.5rem 1.5rem;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-elevated));
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.cta-band h2 {
  margin-top: 0;
}

.cta-band p {
  color: var(--color-muted);
  max-width: 42ch;
  margin: 0 auto 1.25rem;
}

/* ——— Page title category ——— */
.page-intro {
  margin-bottom: 0.5rem;
}

.page-intro .eyebrow {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-teal);
  margin: 0 0 0.35rem;
}

/* ——— Footer site ——— */
.site-footer {
  margin-top: auto;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.85rem;
  text-align: center;
}

/* ——— Skip link a11y ——— */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-teal);
  color: var(--color-bg-deep);
  padding: 0.5rem 1rem;
  z-index: 200;
  font-weight: 600;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* ——— Responsive ——— */
@media (max-width: 960px) {
  .nav-toggle {
    display: inline-flex;
  }

  .sidebar {
    transform: translateX(-100%);
    box-shadow: none;
  }

  body.nav-open .sidebar {
    transform: translateX(0);
    box-shadow: 16px 0 40px rgba(0, 0, 0, 0.45);
  }

  .main-wrap {
    margin-left: 0;
    max-width: none;
  }

  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 85;
    top: var(--header-h);
  }

  body.nav-open .sidebar-backdrop {
    display: block;
  }
}

@media (max-width: 600px) {
  .main-wrap {
    padding: 1.25rem 1rem 2.5rem;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .check-head {
    flex-wrap: wrap;
  }

  .btn-toggle-detail {
    order: 4;
    margin-left: auto;
  }
}

/* ——— Página educativa (guia SEO) ——— */
.article-hero {
  padding-bottom: 1rem;
}

.article-hero .lead {
  max-width: 65ch;
}

.toc-card {
  position: sticky;
  top: calc(var(--header-h) + 12px);
  z-index: 2;
  padding: 1.25rem 1.35rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  margin: 1.5rem 0 2rem;
}

.toc-card h2 {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.toc-list a {
  display: block;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-size: 0.92rem;
  transition: background var(--transition), color var(--transition);
}

.toc-list a:hover {
  color: var(--color-white);
  background: rgba(45, 212, 191, 0.08);
}

.prose {
  font-size: 1.02rem;
  color: #cbd5e1;
  line-height: 1.75;
}

.prose > section {
  margin-bottom: 2.75rem;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.prose h2 {
  color: var(--color-white);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.prose h3 {
  color: var(--color-teal);
  margin: 1.5rem 0 0.65rem;
  font-size: 1.15rem;
}

.prose p {
  margin: 0 0 1rem;
}

.prose ul,
.prose ol {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

.prose li {
  margin-bottom: 0.4rem;
}

.prose strong {
  color: var(--color-white);
  font-weight: 600;
}

.prose a {
  font-weight: 500;
}

.prose .callout {
  margin: 1.25rem 0;
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--color-teal);
  background: rgba(45, 212, 191, 0.08);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.prose .pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.prose .pill {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.8rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-teal);
}

.faq-block {
  margin-top: 2rem;
}

.faq-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.faq-item h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: var(--color-white);
}

.faq-item p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}