/* ==========================================================================
   sumny.tech — Caderno de Engenharia & Documento Técnico
   ========================================================================== */

:root {
  /* Paleta estrita do BRIEF */
  --bg-paper: #F6F4EF;
  --bg-surface: #FFFDF9;
  --ink: #16181C;
  --ink-secondary: #5C6470;
  --rule: #DCD8CF;
  --accent: #C2410C;

  /* Tipografia de sistema */
  --font-serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Métricas de layout */
  --container-max: 1140px;
  --header-height: 64px;
  --sidebar-width: 220px;
  --scroll-offset: 88px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-paper);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--bg-paper);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Acessibilidade e foco */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--bg-surface);
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.5rem 0.875rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  z-index: 1000;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.75rem;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Tipografia base */
h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.15;
}

p {
  color: var(--ink);
  max-width: 68ch;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

a:hover {
  text-decoration-thickness: 2px;
}

/* Rótulos monoespaçados padrão do BRIEF (11px, uppercase, .14em) */
.label-mono {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  line-height: 1.4;
  color: var(--ink-secondary);
}

/* Container central */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   1. Topo (Header)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-paper);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-group {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  min-width: 0;
}

.brand-link {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.brand-link:hover {
  color: var(--accent);
}

.brand-location {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.header-link {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink);
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
}

.header-link:hover,
.header-link[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.btn-cv {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink);
  background-color: var(--bg-surface);
  border: 1px solid var(--ink);
  padding: 0.45rem 0.85rem;
  text-decoration: none;
  white-space: nowrap;
}

.btn-cv:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

/* Botão do menu mobile (visível quando o índice lateral some) */
.mobile-nav-toggle {
  display: none;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-surface);
  color: var(--ink);
  border: 1px solid var(--rule);
  padding: 0.4rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  cursor: pointer;
  line-height: 1.2;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.mobile-nav-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.mobile-nav-toggle[aria-expanded="true"] {
  background-color: var(--ink);
  color: var(--bg-paper);
  border-color: var(--ink);
}

.mobile-nav-panel {
  display: none;
  border-top: 1px solid var(--rule);
  background-color: var(--bg-paper);
  box-shadow: 0 10px 24px rgba(22, 24, 28, 0.06);
}

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

.mobile-nav-inner {
  padding-top: 1rem;
  padding-bottom: 1.25rem;
}

.mobile-nav-group {
  margin-bottom: 1rem;
}

.mobile-nav-group:last-child {
  margin-bottom: 0;
}

.mobile-nav-heading {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-secondary);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.35rem;
  margin-bottom: 0.65rem;
}

.mobile-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.4rem 0.75rem;
}

.mobile-nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink);
  text-decoration: none;
  padding: 0.35rem 0;
}

.mobile-nav-link .index-num {
  color: var(--accent);
}

.mobile-nav-link:hover,
.mobile-nav-link.is-active {
  color: var(--accent);
  text-decoration: none;
}

.mobile-nav-footer {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--rule);
}

.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  margin-top: 0.65rem;
}

@media (min-width: 520px) {
  .mobile-nav-actions {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem 1.25rem;
  }
}

.mobile-nav-action {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink);
  text-decoration: none;
  padding: 0.35rem 0;
  border-bottom: 1px solid transparent;
}

.mobile-nav-action:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

.mobile-nav-action.mobile-nav-cv {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--ink);
  color: var(--ink);
  margin-top: 0.25rem;
}

.mobile-nav-action.mobile-nav-cv:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ==========================================================================
   Layout Principal: Índice Fixo à Esquerda + Conteúdo à Direita
   ========================================================================== */
.workspace-grid {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 3.5rem;
  align-items: start;
  flex: 1;
}

.sidebar-index {
  position: sticky;
  top: var(--scroll-offset);
  padding: 3rem 1.5rem 2rem 0;
  border-right: 1px solid var(--rule);
}

.sidebar-title {
  display: block;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}

.index-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.index-link {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-secondary);
  text-decoration: none;
  padding: 0.2rem 0 0.2rem 0.5rem;
  border-left: 2px solid transparent;
}

.index-num {
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
}

.index-link:hover,
.index-link[aria-current="location"] {
  color: var(--ink);
  border-left-color: var(--accent);
}

.sidebar-meta {
  margin-top: 2.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

/* Coluna de conteúdo principal */
.content-column {
  min-width: 0;
  padding-bottom: 4rem;
}

/* ==========================================================================
   Seções: Régua de 1px, numeração "01 —" e um filete por seção
   ========================================================================== */
.doc-section {
  padding: 3.25rem 0;
  border-top: 1px solid var(--rule);
  scroll-margin-top: var(--scroll-offset);
}

.doc-section:first-child {
  border-top: none;
  padding-top: 3rem;
}

.section-header {
  margin-bottom: 1.75rem;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-secondary);
  margin-bottom: 0.65rem;
}

/* Filete único por seção em laranja-queimado */
.section-filet {
  display: inline-block;
  width: 24px;
  height: 2px;
  background-color: var(--accent);
  flex-shrink: 0;
}

.section-number {
  color: var(--accent);
  font-weight: 600;
}

.section-title {
  font-size: clamp(1.65rem, 3vw, 2.25rem);
}

/* ==========================================================================
   2. Hero
   ========================================================================== */
.hero-name {
  font-size: clamp(2.8rem, 8vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.hero-positioning {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 48ch;
  margin-bottom: 1rem;
}

.hero-support {
  font-size: 1.0625rem;
  color: var(--ink-secondary);
  max-width: 62ch;
  margin-bottom: 2rem;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin-bottom: 2.75rem;
}

.link-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-surface);
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.65rem 1.15rem;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  text-decoration: none;
  font-weight: 600;
}

.link-primary:hover {
  background-color: var(--accent);
  color: var(--bg-surface);
  text-decoration: none;
}

.link-secondary {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
}

/* Faixa de 4 números verdadeiros e conservadores */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background-color: var(--bg-surface);
  border: 1px solid var(--rule);
}

.metric-cell {
  padding: 1.15rem 1.25rem;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.metric-cell:last-child {
  border-right: none;
}

.metric-value {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-secondary);
}

/* ==========================================================================
   3. Sobre
   ========================================================================== */
.prose-block {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin-bottom: 2rem;
}

.prose-block p {
  font-size: 1.0625rem;
  color: var(--ink);
}

.work-principles {
  background-color: var(--bg-surface);
  border: 1px solid var(--rule);
  padding: 1.5rem;
}

.work-principles-title {
  display: block;
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
}

.principles-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.principles-item {
  display: grid;
  grid-template-columns: 32px 1fr;
  align-items: baseline;
  font-size: 0.96875rem;
}

.principles-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 600;
}

/* ==========================================================================
   4. Trabalho Selecionado (6 blocos numerados + kbd-style nos links)
   ========================================================================== */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.project-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--rule);
  padding: 1.75rem;
}

.project-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding-bottom: 0.85rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}

.project-heading-group {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.project-index {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 600;
}

.project-title {
  font-size: 1.35rem;
}

.project-period {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-secondary);
}

.project-description {
  margin-bottom: 1rem;
  color: var(--ink);
}

.project-highlight {
  font-size: 0.925rem;
  color: var(--ink-secondary);
  padding-left: 0.85rem;
  border-left: 2px solid var(--rule);
  margin-bottom: 1.25rem;
}

.project-highlight strong {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink);
  font-weight: 600;
  margin-right: 0.35rem;
}

.project-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.tag-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag-item {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-secondary);
  background-color: var(--bg-paper);
  border: 1px solid var(--rule);
  padding: 0.2rem 0.55rem;
}

/* Micro-detalhe de personalidade: kbd-style nos links de projeto */
.project-kbd-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  color: var(--accent);
}

.project-kbd-link kbd,
kbd.kbd-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  background-color: var(--bg-paper);
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  padding: 0.25rem 0.6rem;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.project-kbd-link:hover kbd {
  border-color: var(--accent);
  background-color: var(--bg-surface);
}

/* ==========================================================================
   5. Outros Produtos (lista compacta de 5 itens, uma linha cada)
   ========================================================================== */
.compact-products {
  list-style: none;
  background-color: var(--bg-surface);
  border: 1px solid var(--rule);
}

.compact-product-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--rule);
}

.compact-product-row:last-child {
  border-bottom: none;
}

.compact-product-main {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  min-width: 0;
}

.compact-product-name {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}

/* ==========================================================================
   6. Stack (5 blocos)
   ========================================================================== */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--rule);
  border: 1px solid var(--rule);
}

.stack-block {
  background-color: var(--bg-surface);
  padding: 1.35rem 1.5rem;
}

.stack-block--wide {
  grid-column: 1 / -1;
}

.stack-category {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--accent);
}

.stack-items {
  font-size: 0.96875rem;
  color: var(--ink);
  line-height: 1.6;
}

/* ==========================================================================
   7. Bloco "Agora" (Micro-detalhe de personalidade)
   ========================================================================== */
.now-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--rule);
  padding: 1.5rem 1.75rem;
}

.now-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}

.now-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.now-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: baseline;
  font-size: 0.96875rem;
}

.now-marker {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.14em;
  font-weight: 600;
}

/* ==========================================================================
   8. Contato
   ========================================================================== */
.contact-dl {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--rule);
  border: 1px solid var(--rule);
}

.contact-item {
  background-color: var(--bg-surface);
  padding: 1.15rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.contact-item--full {
  grid-column: 1 / -1;
}

.contact-dd {
  font-size: 1rem;
  color: var(--ink);
  word-break: break-word;
}

/* ==========================================================================
   9. Estudos de Caso (projetos.html) & 404 (404.html)
   ========================================================================== */
.case-study {
  background-color: var(--bg-surface);
  border: 1px solid var(--rule);
  padding: 2rem;
}

.case-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}

.case-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.case-step {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
}

.case-step:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.case-step-label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--accent);
}

.error-panel {
  max-width: 620px;
  margin: 5rem auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--rule);
  padding: 2.5rem 2rem;
}

/* ==========================================================================
   10. Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: 1.75rem 0;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}

/* ==========================================================================
   Responsividade (320px a 1920px, sem scroll horizontal)
   ========================================================================== */
@media (min-width: 901px) {
  .mobile-nav-panel {
    display: none !important;
  }
}

@media (max-width: 900px) {
  .workspace-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .sidebar-index {
    display: none;
  }

  .mobile-nav-toggle {
    display: inline-flex;
  }

  .metrics-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .metric-cell:nth-child(2) {
    border-right: none;
  }

  .metric-cell:nth-child(1),
  .metric-cell:nth-child(2) {
    border-bottom: 1px solid var(--rule);
  }
}

@media (max-width: 720px) {
  .brand-location {
    display: none;
  }

  .brand-link {
    font-size: 1rem;
    white-space: nowrap;
  }

  .header-actions {
    gap: 0;
  }

  .header-actions .header-link,
  .header-actions .btn-cv {
    display: none !important;
  }

  .mobile-nav-toggle {
    display: inline-flex !important;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 1rem;
  }

  .doc-section {
    padding: 2.25rem 0;
  }

  .metrics-strip {
    grid-template-columns: 1fr;
  }

  .metric-cell {
    border-right: none;
    border-bottom: 1px solid var(--rule);
  }

  .metric-cell:last-child {
    border-bottom: none;
  }

  .project-card,
  .case-study,
  .now-card {
    padding: 1.25rem;
  }

  .stack-grid,
  .contact-dl {
    grid-template-columns: 1fr;
  }

  .compact-product-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}

@media (max-width: 360px) {
  .brand-link {
    font-size: 0.9375rem;
  }
}