/* =========================================================
   Engenho de Ideias — cases
   ========================================================= */
/* ============================
     Cases listing — editorial archive
     ============================ */
  .sub-nav {
    display: flex; align-items: center; justify-content: space-between;
    padding-block: 18px;
    border-bottom: 1px solid var(--line-strong);
    font-size: 12px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--ink-soft);
  }
  .sub-nav a { display: inline-flex; align-items: center; gap: 8px; transition: color .4s cubic-bezier(0.32, 0.72, 0, 1); }
  .sub-nav a:hover { color: var(--orange); }
  .sub-nav a svg { transition: transform .5s cubic-bezier(0.16, 1.08, 0.32, 1); }
  .sub-nav a:hover svg { transform: translateX(-4px); }

  /* Hero — minimal */
  .cases-hero {
    padding-top: clamp(28px, 3vw, 44px);
    padding-bottom: clamp(16px, 2vw, 24px);
  }
  .cases-hero .head-row {
    display: flex; justify-content: space-between; align-items: baseline;
    gap: 24px;
    flex-wrap: wrap;
  }
  .cases-hero h1 {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(30px, 4.2vw, 64px);
    line-height: 1;
    letter-spacing: -0.025em;
    margin: 0;
    max-width: 24ch;
  }
  .cases-hero h1 em { color: var(--orange); font-style: italic; font-weight: 300; }
  .cases-hero .count {
    font-family: var(--sans);
    font-size: 12px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--ink-soft);
    font-feature-settings: "tnum";
  }

  /* Filter bar */
  .cases-filters {
    display: flex; flex-wrap: wrap; gap: 8px;
    padding-block: clamp(20px, 2vw, 28px);
    border-top: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line-strong);
  }
  .filter {
    font-family: var(--sans);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid var(--line-strong);
    color: var(--ink);
    background: transparent;
    cursor: pointer;
    transition: background .4s cubic-bezier(0.32, 0.72, 0, 1), color .4s cubic-bezier(0.32, 0.72, 0, 1), border-color .4s cubic-bezier(0.32, 0.72, 0, 1);
  }
  .filter:hover { border-color: var(--ink); }
  .filter[aria-pressed="true"] {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
  }

  /* Grid */
  .cases-grid {
    padding-block: clamp(24px, 3vw, 40px) clamp(56px, 7vw, 96px);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(36px, 5vw, 64px) clamp(28px, 4vw, 48px);
  }
  .cases-grid .case {
    display: flex; flex-direction: column;
    gap: 0;
    transition: opacity .5s cubic-bezier(0.32, 0.72, 0, 1), transform .5s cubic-bezier(0.32, 0.72, 0, 1);
  }
  .cases-grid .case .frame {
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
    background: var(--paper-2);
    aspect-ratio: 4 / 3;
  }
  .cases-grid .case .frame img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 1.1s cubic-bezier(0.16, 1.08, 0.32, 1), filter .6s cubic-bezier(0.32, 0.72, 0, 1);
    filter: grayscale(15%) contrast(0.98);
  }
  .cases-grid .case:hover .frame img {
    transform: scale(1.04);
    filter: grayscale(0%) contrast(1);
  }
  .cases-grid .case .index {
    position: absolute;
    top: 16px; left: 16px;
    font-family: var(--sans);
    font-feature-settings: "tnum";
    font-size: 12px;
    letter-spacing: 0.22em;
    color: #fff;
    background: #0e0e0c99;
    backdrop-filter: blur(6px);
    padding: 6px 12px;
    border-radius: 999px;
  }
  .cases-grid .case .meta {
    display: flex; justify-content: space-between; align-items: baseline;
    gap: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line-strong);
    margin-bottom: 16px;
  }
  .cases-grid .case .client {
    font-family: var(--sans);
    font-weight: 500;
    font-size: 13px;
    color: var(--ink);
  }
  .cases-grid .case .service {
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-soft);
  }
  .cases-grid .case h2 {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(24px, 2.4vw, 36px);
    line-height: 1.06;
    letter-spacing: -0.022em;
    color: var(--ink);
    margin: 0 0 12px;
    max-width: 24ch;
    text-wrap: balance;
    transition: color .5s cubic-bezier(0.32, 0.72, 0, 1);
  }
  .cases-grid .case:hover h2 { color: var(--orange); }
  .cases-grid .case h2 em { color: var(--orange); font-style: italic; font-weight: 300; }
  .cases-grid .case p.challenge {
    font-family: var(--sans);
    font-size: clamp(14px, 1vw, 16px);
    line-height: 1.5;
    color: var(--ink-soft);
    margin: 0;
    max-width: 44ch;
  }

  /* Marking placeholder */
  .markimg {
    position: absolute; inset: 0;
    display: grid; place-items: center;
    background:
      repeating-linear-gradient(135deg, #1111130a 0 1px, transparent 1px 12px),
      var(--paper-2);
  }
  .markimg .tag {
    font-family: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas, monospace;
    font-size: clamp(10px, 0.85vw, 12px);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-soft);
    background: var(--paper);
    border: 1px dashed #11111340;
    border-radius: 5px;
    padding: 9px 15px;
    display: inline-flex; align-items: center; gap: 9px;
  }
  .markimg .tag::before {
    content: ""; width: 6px; height: 6px; border-radius: 50%;
    background: var(--orange); flex: none;
  }
  body.theme-dark .markimg { background: repeating-linear-gradient(135deg, #ffffff0c 0 1px, transparent 1px 12px), #131315; }
  body.theme-dark .markimg .tag { background: #0a0a0c; color: var(--leaf); border-color: #ffffff2e; }

  /* CTA at end */
  .cases-end {
    padding-block: clamp(72px, 9vw, 120px);
    border-top: 1px solid var(--line-strong);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: end;
  }
  .cases-end h2 {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(32px, 4.4vw, 64px);
    line-height: 1;
    letter-spacing: -0.028em;
    margin: 0;
    text-wrap: balance;
    max-width: 20ch;
  }
  .cases-end h2 em { color: var(--orange); font-style: italic; font-weight: 300; }
  .cases-end .actions { display: flex; gap: 14px; flex-wrap: wrap; }

  @media (max-width: 820px) {
    .cases-hero .head-row { flex-direction: column; align-items: flex-start; gap: 12px; }
    .cases-grid { grid-template-columns: 1fr; }
    .cases-end { grid-template-columns: 1fr; }
  }

  /* =========================================================
     CASES — Tema escuro (all black)
     ========================================================= */
  body.theme-dark { background: #000; color: var(--paper); }

  body.theme-dark .nav {
    background: color-mix(in oklab, #000 86%, transparent);
    border-bottom-color: transparent;
  }
  body.theme-dark .nav.is-scrolled {
    background: color-mix(in oklab, #000 96%, transparent);
    border-bottom-color: #ffffff1f;
  }
  body.theme-dark .brand img { filter: invert(1) brightness(1.05); }
  body.theme-dark .menu a { color: var(--paper); }
  body.theme-dark .nav-cta { background: var(--paper); color: var(--ink); }
  body.theme-dark .nav-cta:hover { background: var(--orange); color: #fff; }
  body.theme-dark .menu-toggle { border-color: #ffffff28; color: var(--paper); }
  body.theme-dark .menu-toggle:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }
  body.theme-dark .btn-ghost { color: var(--paper); border-color: #ffffff33; }
  body.theme-dark .btn-ghost:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

  body.theme-dark .sub-nav { border-bottom-color: #ffffff1f; color: var(--leaf); }

  body.theme-dark .cases-hero h1 { color: var(--paper); }
  body.theme-dark .cases-hero .count { color: var(--leaf); }

  body.theme-dark .cases-filters {
    border-top-color: #ffffff1f;
    border-bottom-color: #ffffff1f;
  }
  body.theme-dark .filter {
    border-color: #ffffff33;
    color: var(--paper);
  }
  body.theme-dark .filter:hover { border-color: var(--paper); }
  body.theme-dark .filter[aria-pressed="true"] {
    background: var(--paper);
    color: var(--ink);
    border-color: var(--paper);
  }

  body.theme-dark .cases-grid .case .frame { background: #0a0a0c; }
  body.theme-dark .cases-grid .case .frame img { filter: grayscale(25%) contrast(0.95) brightness(0.9); }
  body.theme-dark .cases-grid .case:hover .frame img { filter: grayscale(0%) contrast(1) brightness(1); }
  body.theme-dark .cases-grid .case .client { color: var(--paper); }
  body.theme-dark .cases-grid .case .meta { border-bottom-color: #ffffff1f; }
  body.theme-dark .cases-grid .case .service { color: var(--leaf); }
  body.theme-dark .cases-grid .case h2 { color: var(--paper); }
  body.theme-dark .cases-grid .case p.challenge { color: var(--gray-2); }

  body.theme-dark .cases-end { border-top-color: #ffffff1f; }