/* ===========================================================
   Iahumaniza — Design System
   Cores: fundo #F0FDF4 | verde-esmeralda #059669 | índigo #6366F1
   Fonte: Inter | radius: 12px | mobile-first
   =========================================================== */

:root {
  --color-bg: #F0FDF4;
  --color-surface: #FFFFFF;
  --color-surface-alt: #ECFDF5;
  --color-primary: #059669;
  --color-primary-dark: #047857;
  --color-primary-soft: #6EE7B7;
  --color-primary-soft-border: #34D399;
  --color-primary-soft-text: #064E3B;
  --color-accent: #6366F1;
  --color-accent-dark: #4F46E5;
  --color-text: #1E293B;
  --color-text-rgb: 30, 41, 59;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;
  --color-danger: #DC2626;
  --color-danger-bg: #FEF2F2;
  --color-danger-border: #FECACA;
  --color-danger-text: #991B1B;
  --color-success-bg: #ECFDF5;
  --color-success-border: #A7F3D0;
  --color-success-text: #065F46;

  --radius: 12px;
  --radius-sm: 8px;
  --font-base: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --shadow-sm: 0 1px 2px rgba(var(--color-text-rgb), 0.06);
  --shadow-md: 0 4px 12px rgba(var(--color-text-rgb), 0.08);
  --shadow-lg: 0 12px 32px rgba(var(--color-text-rgb), 0.12);

  --max-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Skip link (acessibilidade) */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 1000;
}

.skip-link:focus {
  left: 0;
}

/* ===========================================================
   Header
   =========================================================== */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.brand-logo span {
  color: var(--color-primary);
}

.brand-tagline {
  display: none;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border-left: 1px solid var(--color-border);
  padding-left: 10px;
  margin-left: 2px;
}

@media (min-width: 640px) {
  .brand-tagline {
    display: block;
  }
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

.main-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.main-nav.is-open {
  display: block;
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 12px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.main-nav a {
  display: block;
  padding: 10px 8px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.main-nav a:hover {
  background: var(--color-bg);
  text-decoration: none;
}

@media (min-width: 860px) {
  .nav-toggle {
    display: none;
  }

  .main-nav {
    display: block;
    position: static;
    border: none;
    box-shadow: none;
    background: transparent;
  }

  .main-nav ul {
    flex-direction: row;
    padding: 0;
    gap: 8px;
  }
}

/* ===========================================================
   Hero / Ferramenta
   =========================================================== */

.hero {
  padding: 40px 0 24px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

.hero p.subtitle {
  max-width: 680px;
  margin: 0 auto;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.tool-section {
  padding: 8px 0 48px;
}

.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 20px;
}

@media (min-width: 640px) {
  .tool-card {
    padding: 28px;
  }
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 860px) {
  .tool-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.tool-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tool-field label {
  font-weight: 600;
  font-size: 0.9rem;
}

.tool-field textarea {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px;
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--color-bg);
  color: var(--color-text);
}

.tool-field textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  background: var(--color-surface);
}

.tool-field textarea[readonly] {
  background: var(--color-surface-alt);
}

.char-counter {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: right;
}

.char-counter.is-over {
  color: var(--color-danger);
  font-weight: 600;
}

/* Intensidade toggle */
.intensity-label {
  margin: 20px 0 8px;
  font-weight: 600;
  font-size: 0.9rem;
  text-align: center;
}

.intensity-group {
  display: flex;
  gap: 8px;
  margin: 0 0 4px;
  flex-wrap: wrap;
}

.intensity-btn {
  flex: 1 1 auto;
  min-width: 96px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-primary-soft-border);
  background: var(--color-primary-soft);
  color: var(--color-primary-soft-text);
  font-family: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.intensity-btn:hover {
  background: var(--color-primary-soft-border);
  border-color: var(--color-primary);
}

.intensity-btn[aria-pressed="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary-dark);
  color: #fff;
  box-shadow: 0 0 0 2px var(--color-primary-dark) inset;
}

/* Botões de ação */
.tool-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  padding: 14px 24px;
  transition: background 0.15s ease, transform 0.05s ease, opacity 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-accent);
  color: #fff;
  padding: 10px 18px;
  font-size: 0.9rem;
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-accent-dark);
}

.btn-link {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.85rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 4px;
}

.output-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}

.spinner.is-active {
  display: inline-block;
}

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

.form-message {
  margin-top: 4px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
}

.form-message.is-visible {
  display: block;
}

.form-message.is-error {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
  border: 1px solid var(--color-danger-border);
}

.form-message.is-success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
  border: 1px solid var(--color-success-border);
}

/* ===========================================================
   Seções de conteúdo
   =========================================================== */

.section {
  padding: 48px 0;
}

.section-alt {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 28px;
  text-align: center;
}

/* Passos */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 760px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  margin-bottom: 14px;
}

.step-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.step-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

/* Benefícios */
.benefits-intro {
  max-width: 760px;
  margin: -16px auto 28px;
  text-align: center;
  color: var(--color-text-muted);
}

.benefits-list {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 640px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 640px) {
  .benefits-list {
    grid-template-columns: 1fr 1fr;
  }
}

.benefits-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 0.92rem;
}

.benefits-list li::before {
  content: "\2713";
  color: var(--color-accent);
  font-weight: 800;
  flex-shrink: 0;
}

/* Texto explicativo (GEO-friendly) */
.prose {
  max-width: 760px;
  margin: 0 auto;
  color: var(--color-text-muted);
}

.prose p {
  margin: 0 0 16px;
}

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

/* FAQ */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 16px 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--color-text);
}

.faq-question .icon {
  flex-shrink: 0;
  transition: transform 0.2s ease;
  color: var(--color-primary);
}

.faq-item[data-open="true"] .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 18px;
  max-height: 0;
  overflow: hidden;
  color: var(--color-text-muted);
  font-size: 0.92rem;
  transition: max-height 0.25s ease, padding 0.25s ease;
}

.faq-item[data-open="true"] .faq-answer {
  padding: 0 18px 18px;
  max-height: 400px;
}

/* Cards de artigos */
.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .articles-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.article-card h3 a {
  color: var(--color-text);
}

.article-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  flex-grow: 1;
}

.article-card .read-more {
  font-weight: 600;
  font-size: 0.88rem;
}

/* ===========================================================
   Footer
   =========================================================== */

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 32px 0 24px;
  margin-top: 24px;
}

.footer-nav {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin: 0 0 16px;
  padding: 0;
}

.footer-nav a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-note {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin: 0;
}

/* ===========================================================
   Banner de cookies (LGPD)
   =========================================================== */

.cookie-banner {
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: 16px;
  max-width: 640px;
  margin: 0 auto;
  background: var(--color-text);
  color: #fff;
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  display: none;
}

.cookie-banner.is-visible {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 640px) {
  .cookie-banner.is-visible {
    flex-direction: row;
    align-items: center;
  }
}

.cookie-banner p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-border);
  flex: 1;
}

.cookie-banner a {
  color: #fff;
  text-decoration: underline;
}

.cookie-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.cookie-actions .btn {
  padding: 10px 16px;
  font-size: 0.85rem;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.btn-ghost:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.18);
}

/* ===========================================================
   Utilitários
   =========================================================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}