/* ==========================================================================
   RESET BÁSICO
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

img,
picture,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ==========================================================================
   TOKENS DE DESIGN
   ========================================================================== */
:root {
  /* Cor */
  --color-bg: #FBFAF8;
  --color-surface: #FFFFFF;
  --color-text: #1D1B16;
  --color-text-muted: #5C584E;
  --color-accent: #2F5D50;      /* verde profundo — ação e destaque */
  --color-accent-contrast: #FFFFFF;
  --color-border: #E4E1D8;
  --color-focus: #1657C4;

  /* Tipografia */
  --font-display: "Fira Code", "JetBrains Mono", Consolas, monospace;
  --font-heading: "Space Grotesk", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-code: "Fira Code", "JetBrains Mono", Consolas, monospace;

  --fs-h1: clamp(2.25rem, 4vw + 1rem, 3.75rem);
  --fs-h2: clamp(1.5rem, 2vw + 1rem, 2.25rem);
  --fs-h3: 1.25rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;

  --line-height-tight: 1.15;
  --line-height-base: 1.6;

  /* Espaçamento */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 6rem;

  /* Layout */
  --content-width: 1120px;
  --radius: 6px;
}

/* ==========================================================================
   BASE
   ========================================================================== */
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: var(--line-height-tight);
  font-weight: 600;
  color: var(--color-text);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); margin-bottom: var(--space-md); }
h3 { font-size: var(--fs-h3); margin-bottom: var(--space-xs); }
h4 { font-size: 1rem; margin-bottom: var(--space-xs); }

p {
  color: var(--color-text-muted);
  max-width: 65ch;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

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

/* Foco visível — nunca remover sem substituir */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Utilitário: esconde visualmente, mantém acessível a leitor de tela */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Respeita preferência por menos movimento */
@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;
  }
}

/* ==========================================================================
   SKIP LINK
   ========================================================================== */
.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  background: var(--color-text);
  color: var(--color-accent-contrast);
  padding: var(--space-xs) var(--space-sm);
  z-index: 1000;
  transform: translateY(-200%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

/* ==========================================================================
   CABEÇALHO
   ========================================================================== */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: var(--content-width);
  margin-inline: auto;
}

header .logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
}

.logo-icon {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  margin-inline: 0.25rem;
  vertical-align: -0.2em;
}

nav ul {
  display: flex;
  gap: 0;
  list-style: none;
}

nav a {
  position: relative;
  display: inline-block;
  font-family: var(--font-code);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--fs-small);
  letter-spacing: 0.02em;
  padding: var(--space-md);
}

nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid var(--color-text);
  opacity: 0;
  transition: opacity 0.2s ease;
}

nav a:hover {
  color: var(--color-text);
}

nav a:hover::after {
  opacity: 0.4;
}

nav a[aria-current="page"] {
  color: var(--color-accent);
  font-weight: 600;
}

/* ==========================================================================
   SEÇÕES
   ========================================================================== */
main {
  display: flex;
  flex-direction: column;
}

section {
  padding: var(--space-xl) var(--space-sm);
}

section > * {
  max-width: var(--content-width);
  margin-inline: auto;
}

/* Hero */
#hero {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

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

#hero p {
  font-size: 1.125rem;
  margin-block: var(--space-sm) var(--space-md);
}

.btn {
  display: inline-block;
  font-family: var(--font-code);
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-accent-contrast);
  background-color: var(--color-accent);
  border: none;
  border-radius: var(--radius);
  padding: var(--space-sm) var(--space-lg);
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  color: var(--color-accent-contrast);
  opacity: 0.9;
}

.hero-art svg {
  display: block;
  width: 100%;
  max-width: 420px;
  margin-inline: auto;
}

@media (min-width: 760px) {
  .hero-grid {
    grid-template-columns: 1.2fr 1fr;
  }
}

/* Sobre */
#sobre {
  background-color: var(--color-bg);
}

/* Skills */
#skills {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.timeline {
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 5px;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.375rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-surface);
}

/* Portfólio */
#portfolio {
  background-color: var(--color-bg);
  border-block: 1px solid var(--color-border);
}

.portfolio-nav {
  margin-bottom: var(--space-lg);
}

.portfolio-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  list-style: none;
}

.portfolio-filtro {
  font-family: var(--font-code);
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-xs) var(--space-sm);
  cursor: pointer;
  align-self: auto;
}

.portfolio-filtro:hover {
  opacity: 1;
  color: var(--color-accent-contrast);
  background-color: var(--color-accent);
}

.portfolio-filtro.ativo {
  color: var(--color-accent-contrast);
  background-color: var(--color-accent);
}

.portfolio-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
}

.portfolio-card[hidden] {
  display: none;
}

.portfolio-grid article {
  padding: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.card-skills {
  margin-top: var(--space-sm);
  padding-block: var(--space-xs);
  border-top: 1px solid var(--color-border);
  font-family: var(--font-code);
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  text-align: left;
}

@media (min-width: 640px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Contato */
#contato {
  background-color: var(--color-bg);
}

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

address {
  font-style: normal;
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

address strong {
  color: var(--color-text);
}

/* Formulário */
form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  width: 100%;
}

form div {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

label {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-text);
}

input,
textarea {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  color: var(--color-text);
}

textarea {
  resize: vertical;
}

button {
  align-self: flex-start;
  font-family: var(--font-code);
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-accent-contrast);
  background-color: var(--color-accent);
  border: none;
  border-radius: var(--radius);
  padding: var(--space-sm) var(--space-lg);
  cursor: pointer;
}

.form-erro {
  font-size: var(--fs-small);
  color: #B3261E;
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: #B3261E;
}

button:hover {
  opacity: 0.9;
}

@media (min-width: 760px) {
  .contato-grid {
    grid-template-columns: minmax(0, 1fr) minmax(360px, 480px);
    align-items: start;
  }
}

/* ==========================================================================
   RODAPÉ
   ========================================================================== */
footer {
  padding: var(--space-md) var(--space-sm);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

footer p {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  margin-inline: auto;
}

/* ==========================================================================
   RESPONSIVO
   ========================================================================== */
@media (max-width: 640px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }

  nav ul {
    flex-wrap: wrap;
    gap: 0;
  }

  section {
    padding: var(--space-lg) var(--space-sm);
  }
}