/* =========================================================================
   Exytus Contabilidade — Folha de estilos principal
   Estrutura:
     1. Custom properties (tokens de design)
     2. Reset e base
     3. Tipografia e utilitários
     4. Layout: container e grid
     5. Header e navegação
     6. Botões
     7. Hero
     8. Seções: Serviços, Sobre, Diferenciais, Como funciona
     9. FAQ (details/summary)
    10. CTA final e formulário
    11. Footer
    12. Páginas internas (política, termos, 404)
    13. Acessibilidade e foco
    14. Responsividade (mobile-first, breakpoints 480 / 768 / 1024)
   ========================================================================= */

/* 1. Custom properties */
:root {
  --color-bg: #f8fafc;
  --color-bg-alt: #ffffff;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #0f172a;
  --color-muted: #475569;
  --color-subtle: #64748b;

  --color-primary: #0b2545;
  --color-primary-600: #143a6b;
  --color-primary-50: #eef2f8;

  --color-accent: #1f9d7a;
  --color-accent-600: #17805f;
  --color-accent-50: #e6f5f0;

  --color-focus: #2563eb;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 40px rgba(11, 37, 69, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  --container: 1120px;
  --header-h: 72px;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --transition: 180ms ease;
}

/* 2. Reset e base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

a:hover {
  color: var(--color-accent);
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* 3. Tipografia */
h1,
h2,
h3,
h4 {
  font-family: var(--font-sans);
  color: var(--color-primary);
  line-height: 1.2;
  margin: 0 0 var(--space-4);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.75rem, 3.5vw + 1rem, 3rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.5rem, 2vw + 1rem, 2.25rem);
  font-weight: 700;
}

h3 {
  font-size: 1.125rem;
  font-weight: 600;
}

p {
  margin: 0 0 var(--space-4);
  color: var(--color-muted);
}

.eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent-600);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.section-title {
  max-width: 720px;
  margin-bottom: var(--space-2);
}

.section-lead {
  max-width: 720px;
  margin-bottom: var(--space-10);
  color: var(--color-muted);
  font-size: 1.05rem;
}

/* 4. Layout */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section {
  padding: var(--space-16) 0;
}

.section--tight {
  padding: var(--space-12) 0;
}

.section--alt {
  background: var(--color-bg-alt);
  border-block: 1px solid var(--color-border);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--2 {
  grid-template-columns: 1fr;
}

.grid--3 {
  grid-template-columns: 1fr;
}

.grid--4 {
  grid-template-columns: 1fr;
}

/* 5. Header */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(255, 255, 255, 0.95);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.brand__mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
}

.brand__name {
  font-family: var(--font-sans);
}

.brand__suffix {
  color: var(--color-subtle);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav {
  display: none;
  align-items: center;
  gap: var(--space-6);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__link {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--space-2) 0;
  position: relative;
}

.nav__link:hover {
  color: var(--color-accent-600);
}

.header-cta {
  display: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
}

.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: currentColor;
}

.nav-toggle__bar::before {
  top: -6px;
}

.nav-toggle__bar::after {
  top: 6px;
}

/* Mobile drawer (não trava scroll — apenas expande abaixo do header) */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-5);
  box-shadow: var(--shadow-md);
  z-index: 40;
}

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

.mobile-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-nav__link {
  display: block;
  padding: var(--space-3) var(--space-2);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.mobile-nav__link:hover,
.mobile-nav__link:focus {
  background: var(--color-primary-50);
}

.mobile-nav__cta {
  margin-top: var(--space-3);
}

/* 6. Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: transform var(--transition), background var(--transition),
    color var(--transition), border-color var(--transition), box-shadow var(--transition);
  line-height: 1.2;
  min-height: 44px;
  text-align: center;
}

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

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 6px 16px rgba(31, 157, 122, 0.25);
}

.btn--primary:hover {
  background: var(--color-accent-600);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-50);
}

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

.btn--light:hover {
  border-color: var(--color-primary);
}

.btn--sm {
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  min-height: 36px;
}

.btn--block {
  width: 100%;
}

.btn__icon {
  width: 18px;
  height: 18px;
}

/* 7. Hero */
.hero {
  padding: calc(var(--header-h) + var(--space-16)) 0 var(--space-16);
  background:
    radial-gradient(1200px 500px at 90% -10%, rgba(31, 157, 122, 0.15), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(11, 37, 69, 0.08), transparent 60%),
    var(--color-bg);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

.hero__eyebrow {
  color: var(--color-accent-600);
}

.hero__title {
  margin-bottom: var(--space-4);
}

.hero__subtitle {
  font-size: 1.125rem;
  max-width: 620px;
  color: var(--color-muted);
  margin-bottom: var(--space-6);
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.8125rem;
  color: var(--color-muted);
  box-shadow: var(--shadow-sm);
  max-width: 100%;
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(31, 157, 122, 0.15);
}

.hero__art {
  position: relative;
  aspect-ratio: 5 / 4;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #0b2545 0%, #143a6b 60%, #1f9d7a 130%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero__art svg {
  width: 100%;
  height: 100%;
}

/* 8. Cards de serviço */
.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

.service-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.service-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-50);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.service-card__icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-card h3 {
  margin-bottom: var(--space-2);
}

.service-card p {
  margin: 0;
  font-size: 0.95rem;
}

/* Sobre */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: start;
}

.about__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.fact {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.fact__label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}

.fact__value {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.95rem;
}

/* Diferenciais */
.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.feature {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--color-border);
}

.feature__icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--color-accent-50);
  color: var(--color-accent-600);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.feature__icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Como funciona */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  counter-reset: step;
}

.step {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
}

.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: var(--space-4);
  right: var(--space-5);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary-50);
}

/* 9. FAQ */
.faq {
  display: grid;
  gap: var(--space-3);
  max-width: 820px;
}

.faq details {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq details[open] {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.faq summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-1) 0;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "";
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: rotate(45deg);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-top: -4px;
}

.faq details[open] summary::after {
  transform: rotate(-135deg);
  margin-top: 4px;
}

.faq p {
  margin: var(--space-3) 0 var(--space-1);
  color: var(--color-muted);
}

/* 10. CTA final e formulário */
.contact {
  background:
    radial-gradient(700px 400px at 100% 0%, rgba(31, 157, 122, 0.12), transparent 60%),
    var(--color-primary);
  color: #e2e8f0;
}

.contact h2 {
  color: #fff;
}

.contact p {
  color: rgba(226, 232, 240, 0.85);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: start;
}

.contact__info {
  display: grid;
  gap: var(--space-4);
}

.contact-item {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.contact-item__icon {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.contact-item__icon svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-item__label {
  font-size: 0.75rem;
  color: rgba(226, 232, 240, 0.7);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 2px;
}

.contact-item__value {
  color: #fff;
  font-weight: 500;
  word-break: break-word;
}

.contact-item__value a {
  color: #fff;
}

.contact-item__value a:hover {
  color: var(--color-accent);
}

.form {
  background: #fff;
  color: var(--color-text);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: var(--space-4);
}

.form h3 {
  margin: 0;
}

.form p {
  color: var(--color-muted);
  margin: 0 0 var(--space-2);
  font-size: 0.95rem;
}

.field {
  display: grid;
  gap: var(--space-2);
}

.field label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.field input,
.field textarea {
  font: inherit;
  color: var(--color-text);
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(11, 37, 69, 0.15);
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.checkbox {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.checkbox input {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.checkbox a {
  text-decoration: underline;
}

.form__feedback {
  min-height: 1.25rem;
  font-size: 0.875rem;
  color: var(--color-accent-600);
  font-weight: 500;
}

.form__feedback[data-state="error"] {
  color: #b91c1c;
}

.form__hint {
  font-size: 0.75rem;
  color: var(--color-subtle);
  margin: 0;
}

/* 11. Footer */
.site-footer {
  background: #071a30;
  color: rgba(226, 232, 240, 0.75);
  padding: var(--space-16) 0 var(--space-8);
}

.site-footer a {
  color: rgba(226, 232, 240, 0.9);
}

.site-footer a:hover {
  color: #fff;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

.footer__brand p {
  color: rgba(226, 232, 240, 0.7);
  font-size: 0.9375rem;
  margin-top: var(--space-3);
}

.footer h4 {
  color: #fff;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
  font-size: 0.9375rem;
}

.footer__legal {
  border-top: 1px solid rgba(226, 232, 240, 0.1);
  padding-top: var(--space-6);
  font-size: 0.8125rem;
  color: rgba(226, 232, 240, 0.6);
  display: grid;
  gap: var(--space-2);
}

.footer__legal strong {
  color: rgba(226, 232, 240, 0.85);
  font-weight: 600;
}

.footer__disclaimer {
  color: rgba(226, 232, 240, 0.55);
}

/* 12. Páginas internas (política, termos, 404) */
.doc {
  padding: calc(var(--header-h) + var(--space-12)) 0 var(--space-16);
}

.doc__content {
  max-width: 780px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-10);
  box-shadow: var(--shadow-sm);
}

.doc__content h1 {
  margin-bottom: var(--space-2);
}

.doc__updated {
  color: var(--color-subtle);
  font-size: 0.875rem;
  margin-bottom: var(--space-8);
}

.doc__content h2 {
  font-size: 1.25rem;
  margin-top: var(--space-8);
}

.doc__content h3 {
  color: var(--color-primary);
  margin-top: var(--space-6);
  font-size: 1rem;
}

.doc__content ul,
.doc__content ol {
  padding-left: var(--space-6);
  color: var(--color-muted);
  margin: 0 0 var(--space-4);
}

.doc__content li {
  margin-bottom: var(--space-2);
}

.doc__content p {
  color: var(--color-muted);
}

.doc__content a {
  color: var(--color-primary);
  text-decoration: underline;
}

.doc__content a:hover {
  color: var(--color-accent-600);
}

/* 404 */
.notfound {
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: var(--space-16) var(--space-5);
  background: var(--color-bg);
}

.notfound__inner {
  max-width: 520px;
}

.notfound__code {
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  margin: 0;
  line-height: 1;
}

.notfound__title {
  margin: var(--space-3) 0 var(--space-2);
}

.notfound__actions {
  margin-top: var(--space-6);
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* 13. Acessibilidade e foco */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-3);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 100;
  transition: top var(--transition);
}

.skip-link:focus {
  top: var(--space-3);
  color: #fff;
}

.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;
}

/* 14. Responsividade */
@media (min-width: 480px) {
  .hero__badge {
    font-size: 0.875rem;
  }
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-8);
  }

  .services__grid,
  .features__grid,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about__grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .contact__grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .footer__legal {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .nav,
  .header-cta {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }

  .hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--space-12);
  }

  .services__grid,
  .features__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}