/* ==========================================================================
   Arthur Alves — Portfólio
   Estrutura: 1 Tokens · 2 Base · 3 Layout · 4 Header · 5 Hero · 6 Seções ·
              7 Galeria · 8 Casos · 9 Processo · 10 Competências · 11 Contato ·
              12 Rodapé · 13 Lightbox · 14 Movimento
   ========================================================================== */

/* 1. Tokens ---------------------------------------------------------------- */
@font-face {
  font-family: "Instrument Serif";
  src: url("..../fonts/InstrumentSerif-Regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Instrument Serif";
  src: url("..../fonts/InstrumentSerif-Italic.woff") format("woff");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Instrument Sans";
  src: url("..../fonts/InstrumentSans-Regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --ink: #000;
  --paper: #fff;
  --mute: #595959;        /* texto secundário sobre branco (contraste 7:1) */
  --mute-inv: #a8a8a8;    /* texto secundário sobre preto (contraste 9:1) */
  --rule: #d2d2d2;
  --rule-inv: #333;

  --serif: "Instrument Serif", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Instrument Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --header-h: 4rem;
  --gutter: clamp(1.25rem, 4.5vw, 4rem);
  --max: 92rem;
  --ease: cubic-bezier(0.19, 0.8, 0.22, 1);
}

/* 2. Base ------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
  color-scheme: light;
}
html:has(dialog[open]) { overflow: hidden; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4, p, dl, dd, ul, ol, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
h1, h2, h3, h4 { font-weight: 400; text-wrap: balance; }
p { text-wrap: pretty; }

a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }

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

.skip {
  position: fixed; top: .75rem; left: .75rem; z-index: 100;
  padding: .75rem 1rem; background: var(--ink); color: var(--paper);
  transform: translateY(-200%);
}
.skip:focus { transform: none; }

/* 3. Layout e componentes comuns ------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(5rem, 10vw, 10rem); }
.is-dark { background: var(--ink); color: var(--paper); }

.section__head { margin-bottom: clamp(3rem, 6vw, 6rem); }

.h2 {
  font: 400 clamp(2.75rem, 1.2rem + 6.2vw, 7rem) / 0.95 var(--serif);
  letter-spacing: -0.02em;
}
.h2--xl { font-size: clamp(3.5rem, 1rem + 12vw, 11rem); line-height: 0.9; }

.sub {
  margin-top: 1.25rem;
  max-width: 34rem;
  font-size: 1.1875rem;
  line-height: 1.5;
  color: var(--mute);
}
.sub--wide { max-width: 40rem; }
.is-dark .sub { color: var(--mute-inv); }

.label {
  font: 400 .9375rem/1.3 var(--sans);
  color: var(--mute);
}
.is-dark .label { color: var(--mute-inv); }

.lead {
  font: 400 clamp(1.5rem, 1.1rem + 1.4vw, 2.125rem) / 1.25 var(--serif);
  letter-spacing: -0.005em;
}

.prose { max-width: 36rem; }
.prose p + p { margin-top: 1.25rem; }
.prose .lead + p { margin-top: 1.75rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 3.25rem; padding: 0 1.75rem;
  border: 1px solid var(--ink);
  font: 400 1rem/1 var(--sans);
  text-decoration: none;
  transition: background-color .2s ease, color .2s ease;
}
.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid:hover { background: var(--paper); color: var(--ink); }
.btn--line { background: transparent; color: var(--ink); }
.btn--line:hover { background: var(--ink); color: var(--paper); }

/* 4. Header ---------------------------------------------------------------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  height: var(--header-h);
  color: var(--hdr-fg);
  transition: color .3s ease;
}
/* O fundo vive num pseudo-elemento: backdrop-filter no próprio header
   prenderia o menu mobile (position: fixed) dentro da altura da barra. */
.header::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--hdr-bg);
  border-bottom: 1px solid var(--hdr-line);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  backdrop-filter: blur(14px) saturate(1.2);
  transition: background-color .3s ease, border-color .3s ease;
}
.header[data-theme="light"] { --hdr-bg: rgba(255,255,255,.86); --hdr-fg: var(--ink);   --hdr-line: rgba(0,0,0,.08); }
.header[data-theme="dark"]  { --hdr-bg: rgba(0,0,0,.84);       --hdr-fg: var(--paper); --hdr-line: rgba(255,255,255,.14); }
.header.is-open             { --hdr-bg: var(--ink);            --hdr-fg: var(--paper); --hdr-line: var(--rule-inv); }

.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter);
}

.brand { font: 400 1.625rem/1 var(--serif); text-decoration: none; letter-spacing: -0.01em; }

.nav ul { display: flex; gap: clamp(1.25rem, 2.2vw, 2.25rem); }
.nav a {
  position: relative; display: inline-block; padding-block: .5rem;
  font-size: .9375rem; text-decoration: none;
}
.nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: .3rem; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav a:hover::after, .nav a[aria-current="true"]::after { transform: scaleX(1); }

.menu-btn {
  display: none; align-items: center; gap: .75rem;
  min-height: 2.75rem; padding-inline: .25rem;
  font-size: .9375rem;
}
.menu-btn__bars { position: relative; width: 1.5rem; height: .625rem; }
.menu-btn__bars::before, .menu-btn__bars::after {
  content: ""; position: absolute; left: 0; width: 100%; height: 1px; background: currentColor;
  transition: transform .3s var(--ease), top .3s var(--ease);
}
.menu-btn__bars::before { top: 0; }
.menu-btn__bars::after { top: 100%; }
.menu-btn[aria-expanded="true"] .menu-btn__bars::before { top: 50%; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] .menu-btn__bars::after  { top: 50%; transform: rotate(-45deg); }

@media (max-width: 1020px) {
  .menu-btn { display: inline-flex; }
  .nav {
    position: fixed; inset: var(--header-h) 0 0 0;
    padding: 1.5rem var(--gutter) 3rem;
    background: var(--ink); color: var(--paper);
    overflow-y: auto;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity .3s ease, transform .3s var(--ease), visibility 0s linear .3s;
  }
  .header.is-open .nav { opacity: 1; visibility: visible; transform: none; transition-delay: 0s; }
  .nav ul { flex-direction: column; gap: 0; }
  .nav li { border-top: 1px solid var(--rule-inv); }
  .nav li:last-child { border-bottom: 1px solid var(--rule-inv); }
  .nav a { display: block; padding-block: 1rem; font: 400 clamp(2rem, 8vw, 3rem) / 1.1 var(--serif); }
  .nav a::after { display: none; }
}

/* 5. Hero ------------------------------------------------------------------ */
.hero {
  display: flex; flex-direction: column; justify-content: flex-end;
  min-height: 100svh;
  padding-top: calc(var(--header-h) + 2rem);
}

.hero__grid {
  display: grid; align-items: end; gap: 2.5rem;
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.hero__title {
  font: 400 clamp(4rem, 11.5vw, 11rem) / 0.94 var(--serif);
  letter-spacing: -0.035em;
  margin-left: 0;
}
.hero__line { display: block; overflow: hidden; padding-block: .08em .09em; }
.hero__line > span { display: inline-block; }

.hero__aside { max-width: 30rem; }
.hero__role { font-size: 1.0625rem; color: var(--mute); }
.hero__lead {
  margin-top: .75rem;
  font: 400 clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem) / 1.2 var(--serif);
}
.hero__cta { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }

.hero__foot {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 2rem;
  padding-block: 1rem;
  border-top: 1px solid var(--rule);
  font-size: .9375rem; color: var(--mute);
}

@media (min-width: 900px) {
  .hero__grid { grid-template-columns: minmax(0, 1fr) minmax(18rem, 26rem); gap: 3rem; }
}

/* 6. Sobre ----------------------------------------------------------------- */
.split { display: grid; gap: 2.5rem; }
@media (min-width: 900px) {
  .split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 4rem; align-items: end; }
}

.areas { margin-top: clamp(4rem, 8vw, 8rem); display: grid; gap: 1.5rem; }
.areas__list li {
  padding-block: .5rem .6rem;
  border-top: 1px solid var(--rule);
  font: 400 clamp(2rem, 1.2rem + 2.8vw, 3.75rem) / 1.1 var(--serif);
  letter-spacing: -0.01em;
}
.areas__list li:last-child { border-bottom: 1px solid var(--rule); }
@media (min-width: 900px) {
  .areas { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 4rem; }
  .areas .label { padding-top: 1.25rem; }
}

/* 7. Galeria --------------------------------------------------------------- */
.gallery { display: grid; gap: 3.5rem 1.5rem; align-items: start; }
@media (min-width: 620px)  { .gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); } .gallery li:nth-child(even) { margin-top: 3.5rem; } }
@media (min-width: 1000px) { .gallery { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 3rem 1.5rem; } .gallery li:nth-child(even) { margin-top: 5rem; } }

.card { display: block; text-decoration: none; }
.card__img { display: block; overflow: hidden; background: #111; }
.card__img img { width: 100%; transition: transform 1s var(--ease); }
.card:hover .card__img img, .card:focus-visible .card__img img { transform: scale(1.035); }

.card__meta {
  display: grid; grid-template-columns: auto 1fr; align-items: baseline;
  gap: .25rem .75rem; margin-top: 1.1rem;
}
.card__idx { font-size: .9375rem; color: var(--mute-inv); }
.card__name {
  font: 400 clamp(1.75rem, 1.4rem + 1vw, 2.25rem) / 1.05 var(--serif);
  text-decoration: underline; text-decoration-color: transparent;
  text-decoration-thickness: 1px; text-underline-offset: .18em;
  transition: text-decoration-color .25s ease;
}
.card:hover .card__name, .card:focus-visible .card__name { text-decoration-color: currentColor; }
.card__cat { grid-column: 2; font-size: .9375rem; line-height: 1.4; color: var(--mute-inv); }

.note { margin-top: clamp(3.5rem, 6vw, 6rem); font-size: .9375rem; color: var(--mute-inv); }

/* 8. Estudos de caso ------------------------------------------------------- */
.section--cases { padding-bottom: 0; }

.case { padding-block: clamp(4rem, 8vw, 8rem); border-top: 1px solid var(--rule); }
.case:last-child { padding-bottom: clamp(5rem, 10vw, 10rem); }

.case__grid { display: grid; gap: 2.5rem; }

.zoom { display: block; width: 100%; cursor: zoom-in; }
.zoom img { width: 100%; outline: 1px solid rgba(0,0,0,.1); outline-offset: -1px; }

.case__meta { display: flex; flex-wrap: wrap; gap: .25rem 1.5rem; font-size: .9375rem; color: var(--mute); }
.case__meta span:first-child { color: var(--ink); }
.case__title {
  margin: 1rem 0 1.75rem;
  font: 400 clamp(3.5rem, 1.6rem + 7vw, 8.5rem) / 0.9 var(--serif);
  letter-spacing: -0.03em;
}
.case__sub { margin: -0.75rem 0 1.75rem; font: italic 400 clamp(1.375rem, 1.1rem + 0.8vw, 1.75rem) / 1.25 var(--serif); }

.facts > div, .decisions > div { padding-block: 1.1rem 1.25rem; border-top: 1px solid var(--rule); }
.facts > div:last-child { border-bottom: 1px solid var(--rule); }
.decisions > div:last-child { border-bottom: 1px solid var(--rule); }
dt { font-size: .9375rem; color: var(--mute); }
dd { margin-top: .35rem; max-width: 34rem; font-size: 1.1875rem; line-height: 1.5; }

.case .label { margin-top: 2.75rem; margin-bottom: .75rem; color: var(--ink); font-size: 1.0625rem; }

.decisions__hook dd {
  font: 400 clamp(2rem, 1.3rem + 2.6vw, 3.5rem) / 1.05 var(--serif);
  letter-spacing: -0.015em; max-width: none;
}

@media (min-width: 900px) {
  .case__grid { grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 1.5rem; align-items: start; }
  .case__media { grid-column: 1 / span 5; grid-row: 1; position: sticky; top: calc(var(--header-h) + 1.5rem); }
  .case__body  { grid-column: 7 / span 6; grid-row: 1; }
  .case--flip .case__media { grid-column: 8 / span 5; }
  .case--flip .case__body  { grid-column: 1 / span 6; }
  /* Mantém o criativo inteiro visível na tela enquanto o texto rola (--ar = largura/altura) */
  .zoom { width: min(100%, calc((100svh - var(--header-h) - 3rem) * var(--ar))); }
}

/* 9. Processo -------------------------------------------------------------- */
.steps li {
  position: relative;
  display: grid; gap: .5rem 2rem;
  padding-block: 2rem 2.25rem;
}
.steps li::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: var(--rule-inv);
  transform-origin: left;
  transition: transform 1.2s var(--ease);
}
.steps li:last-child { border-bottom: 1px solid var(--rule-inv); }
.steps__n { font-size: .9375rem; color: var(--mute-inv); }
.steps__name { font: 400 clamp(2.5rem, 1.2rem + 4.8vw, 5.5rem) / 1 var(--serif); letter-spacing: -0.02em; }
.steps__desc { font-size: 1.1875rem; color: var(--mute-inv); }

@media (min-width: 760px) {
  .steps li { grid-template-columns: 6rem minmax(0, 1fr) minmax(0, 1fr); align-items: baseline; }
}

/* 10. Competências --------------------------------------------------------- */
.skills { display: grid; gap: 3.5rem; }
.skills__list li {
  padding-block: .6rem .7rem;
  border-top: 1px solid var(--rule);
  font: 400 clamp(1.75rem, 1.2rem + 1.8vw, 2.75rem) / 1.15 var(--serif);
  letter-spacing: -0.01em;
}
.skills__list li:last-child { border-bottom: 1px solid var(--rule); }
.skills .label { margin-bottom: 1rem; }
.skills__note { display: block; margin-top: .25rem; font: 400 1rem/1.4 var(--sans); letter-spacing: 0; color: var(--mute); }
@media (min-width: 900px) {
  .skills { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 4rem; }
}

/* 11. Contato -------------------------------------------------------------- */
.section--contact { padding-bottom: clamp(4rem, 8vw, 7rem); }
.contact { margin-top: clamp(3rem, 6vw, 5rem); }
.contact li { border-top: 1px solid var(--rule-inv); }
.contact li:last-child { border-bottom: 1px solid var(--rule-inv); }

.contact__row {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center;
  gap: .25rem 1.5rem;
  padding: 1.5rem 0; min-height: 4.5rem;
  text-decoration: none;
  transition: background-color .25s ease, color .25s ease, padding .35s var(--ease);
}
.contact__label { grid-column: 1 / -1; font-size: .9375rem; color: var(--mute-inv); transition: color .25s ease; }
.contact__value {
  font: 400 clamp(1.5rem, 0.9rem + 2.8vw, 3.25rem) / 1.1 var(--serif);
  letter-spacing: -0.01em; overflow-wrap: anywhere;
}
.contact__icon { width: clamp(1.5rem, 1rem + 1.6vw, 2.5rem); height: auto; transition: transform .35s var(--ease); }

.contact__row:hover, .contact__row:focus-visible { background: var(--paper); color: var(--ink); padding-inline: 1.25rem; }
.contact__row:hover .contact__label, .contact__row:focus-visible .contact__label { color: var(--mute); }
.contact__row:hover .contact__icon, .contact__row:focus-visible .contact__icon { transform: translateX(.35rem); }
.contact__row:focus-visible { outline-offset: -4px; }

@media (min-width: 760px) {
  .contact__row { grid-template-columns: 10rem minmax(0, 1fr) auto; gap: 1.5rem; }
  .contact__label { grid-column: auto; }
}

/* 12. Rodapé --------------------------------------------------------------- */
.footer { background: var(--ink); color: var(--mute-inv); font-size: .9375rem; }
.footer__inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: .75rem 2rem;
  padding-block: 1.75rem 2.25rem;
  border-top: 1px solid var(--rule-inv);
}
.footer a { color: var(--paper); }

/* 13. Lightbox ------------------------------------------------------------- */
.lightbox {
  width: 100vw; max-width: none; height: 100svh; max-height: none;
  margin: 0; padding: 1rem; border: 0; background: transparent; color: var(--paper);
}
.lightbox[open] { display: grid; place-items: center; }
.lightbox::backdrop { background: rgba(0,0,0,.97); }
.lightbox__img { max-width: min(94vw, 62rem); max-height: 92svh; width: auto; height: auto; }
.lightbox__close {
  position: fixed; top: 1rem; right: 1rem; z-index: 2;
  display: grid; place-items: center; width: 3rem; height: 3rem;
  border: 1px solid var(--rule-inv); background: var(--ink); color: var(--paper);
}
.lightbox__close svg { width: 1.5rem; height: 1.5rem; }
.lightbox__close:hover { background: var(--paper); color: var(--ink); }

/* 14. Movimento ------------------------------------------------------------ */
/* Um único momento orquestrado: o nome entra por máscara. O resto é discreto. */
@keyframes rise { to { transform: translateY(0); } }
@keyframes appear { to { opacity: 1; } }

.js .hero__line > span { transform: translateY(112%); animation: rise 1.2s var(--ease) .1s forwards; }
.js .hero__line:nth-child(2) > span { animation-delay: .24s; }
.js .hero__aside, .js .hero__foot { opacity: 0; animation: appear .9s ease .75s forwards; }

/* Criativos: revelação por máscara, uma vez, ao entrar na tela */
/* (a máscara fica na <picture>; o elemento observado continua com área visível) */
.js .reveal-img[data-reveal] picture { clip-path: inset(0 0 100% 0); transition: clip-path 1.3s var(--ease); }
.js .reveal-img[data-reveal].is-in picture { clip-path: inset(0); }

/* Filetes do processo desenhados ao entrar na tela */
.js .steps li[data-reveal]::before { transform: scaleX(0); }
.js .steps li[data-reveal].is-in::before { transform: scaleX(1); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .hero__line > span, .js .hero__aside, .js .hero__foot { animation: none; transform: none; opacity: 1; }
  .js .reveal-img[data-reveal] picture { clip-path: none; transition: none; }
  .js .steps li[data-reveal]::before { transform: none; transition: none; }
  .card__img img, .contact__icon, .nav a::after { transition: none; }
}