/* ===== CENA 02 — SOBRE / MANIFESTO (mobile-first) ===== */
.sb {
  position: relative;
  background: #F0EDE8;
  color: #1F2933;
  padding: 80px 24px 100px;
  overflow: hidden;
  font-family: var(--font-text, 'Inter'), sans-serif;
}

/* Topbar */
.sb__topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono, 'JetBrains Mono'), monospace;
  font-size: 9px;
  letter-spacing: 0.28em;
  color: rgba(31, 41, 51, 0.55);
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(31, 41, 51, 0.12);
  margin-bottom: 56px;
  text-transform: uppercase;
}
.sb__cap--right { display: none; }

/* Hero */
.sb__hero {
  display: grid;
  gap: 32px;
  margin-bottom: 80px;
}
.sb__title {
  font-family: var(--font-editorial, 'Fraunces'), serif;
  font-weight: 400;
  font-size: clamp(48px, 14vw, 160px);
  line-height: 0.95;
  letter-spacing: -0.025em;
  margin: 0;
  color: #1F2933;
}
.sb__italic {
  font-style: italic;
  color: #2E6FB8;
  font-weight: 400;
  font-variation-settings: 'opsz' 144, 'wght' 400;
}
.sb__dot { color: #2E6FB8; }

.sb__sub {
  font-size: 16px;
  line-height: 1.55;
  color: rgba(31, 41, 51, 0.72);
  max-width: 520px;
  margin: 0;
}

.sb__meta {
  display: grid;
  gap: 6px;
  padding: 20px 0 0;
  border-top: 1px solid rgba(31, 41, 51, 0.12);
}
.sb__meta-kicker,
.sb__meta-foot {
  font-family: var(--font-mono, 'JetBrains Mono'), monospace;
  font-size: 9px;
  letter-spacing: 0.3em;
  color: rgba(31, 41, 51, 0.5);
  text-transform: uppercase;
}
.sb__meta-name {
  font-family: var(--font-editorial, 'Fraunces'), serif;
  font-weight: 600;
  font-size: 14px;
  line-height: 1.3;
  color: #1F2933;
}

/* Side index hidden on mobile */
.sb__index { display: none; }

/* Principles list */
.sb__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sb__item {
  position: relative;
  padding: 56px 18px;
  border-top: 1px solid rgba(31, 41, 51, 0.12);
  isolation: isolate;
  overflow: hidden;
}
.sb__item:last-child { border-bottom: 1px solid rgba(31, 41, 51, 0.12); }

/* Bracket frame corners */
.sb__item::before,
.sb__item::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 24px;
  border: 1px solid rgba(31, 41, 51, 0.22);
  pointer-events: none;
  z-index: 3;
}
.sb__item::before {
  top: 12px;
  left: 12px;
  border-right: none;
  border-bottom: none;
}
.sb__item::after {
  bottom: 12px;
  right: 12px;
  border-left: none;
  border-top: none;
}

/* Ghost giant number */
.sb__ghost {
  position: absolute;
  left: -3vw;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-editorial, 'Fraunces'), serif;
  font-weight: 400;
  font-size: 42vw;
  color: rgba(31, 41, 51, 0.05);
  line-height: 0.85;
  pointer-events: none;
  user-select: none;
  z-index: 0;
  letter-spacing: -0.04em;
  font-variation-settings: 'opsz' 144, 'wght' 300;
}

/* Head */
.sb__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
  position: relative;
  z-index: 2;
}
.sb__num {
  font-family: var(--font-editorial, 'Fraunces'), serif;
  font-weight: 400;
  font-size: 38px;
  line-height: 1;
  color: #1F2933;
}
.sb__label {
  font-family: var(--font-mono, 'JetBrains Mono'), monospace;
  font-size: 10px;
  letter-spacing: 0.32em;
  color: rgba(31, 41, 51, 0.6);
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(31, 41, 51, 0.22);
  text-transform: uppercase;
}

/* Title + body */
.sb__h3 {
  font-family: var(--font-editorial, 'Fraunces'), serif;
  font-weight: 400;
  font-size: clamp(24px, 6.6vw, 36px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  position: relative;
  z-index: 2;
  max-width: 22ch;
  color: #1F2933;
}
.sb__h3 em {
  font-style: italic;
  color: #2E6FB8;
}
.sb__body {
  font-size: 15px;
  line-height: 1.62;
  color: rgba(31, 41, 51, 0.72);
  margin: 0;
  max-width: 52ch;
  position: relative;
  z-index: 2;
}

/* Crosshair dot decoration */
.sb__aim {
  position: absolute;
  right: 20px;
  bottom: 60px;
  width: 22px;
  height: 22px;
  border: 1px solid rgba(31, 41, 51, 0.35);
  border-radius: 50%;
  display: grid;
  place-items: center;
  z-index: 2;
  pointer-events: none;
}
.sb__aim::after {
  content: "";
  width: 4px;
  height: 4px;
  background: #2E6FB8;
  border-radius: 50%;
}

/* Reveal */
.sb__item {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .85s cubic-bezier(.2,.7,.2,1), transform .85s cubic-bezier(.2,.7,.2,1);
}
.sb__item.is-in { opacity: 1; transform: none; }

.sb__topbar,
.sb__title,
.sb__sub,
.sb__meta {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1s ease, transform 1s ease;
}
.sb.is-in .sb__topbar { opacity: 1; transform: none; transition-delay: .05s; }
.sb.is-in .sb__title  { opacity: 1; transform: none; transition-delay: .15s; }
.sb.is-in .sb__sub    { opacity: 1; transform: none; transition-delay: .35s; }
.sb.is-in .sb__meta   { opacity: 1; transform: none; transition-delay: .5s; }

/* ===== Tablet ≥640px ===== */
@media (min-width: 640px) {
  .sb { padding: 100px 56px 120px; }
  .sb__cap--right { display: inline; }
  .sb__num { font-size: 56px; }
  .sb__item { padding: 72px 36px; }
  .sb__item::before, .sb__item::after { width: 32px; height: 32px; }
}

/* ===== Desktop ≥960px ===== */
@media (min-width: 960px) {
  .sb { padding: 120px 80px 140px; }

  .sb__hero {
    grid-template-columns: 1fr 280px;
    column-gap: 64px;
    row-gap: 28px;
    align-items: end;
    margin-bottom: 120px;
  }
  .sb__title { grid-column: 1; }
  .sb__sub   { grid-column: 1; max-width: 540px; }
  .sb__meta {
    grid-column: 2;
    grid-row: 1 / 3;
    align-self: end;
    border-top: none;
    border-left: 1px solid rgba(31, 41, 51, 0.18);
    padding: 0 0 0 24px;
  }

  /* Side index visible */
  .sb__index {
    position: absolute;
    left: 28px;
    top: 50%;
    transform: translateY(-50%);
    display: grid;
    gap: 12px;
    font-family: var(--font-mono, 'JetBrains Mono'), monospace;
    font-size: 10px;
    letter-spacing: 0.28em;
    color: rgba(31, 41, 51, 0.5);
    z-index: 5;
    text-transform: uppercase;
  }
  .sb__index-num { font-size: 14px; color: rgba(31, 41, 51, 0.4); }
  .sb__index-list {
    list-style: none;
    padding: 0;
    margin: 14px 0 0;
    display: grid;
    gap: 12px;
  }
  .sb__index-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0.45;
    transition: opacity .35s ease, color .35s ease;
  }
  .sb__index-list li::before {
    content: "";
    display: block;
    width: 18px;
    height: 1px;
    background: currentColor;
    transition: width .35s ease;
  }
  .sb__index-list li.is-active {
    opacity: 1;
    color: #1F2933;
  }
  .sb__index-list li.is-active::before {
    width: 32px;
    background: #2E6FB8;
  }

  .sb__list { padding-left: 100px; }
  .sb__item {
    padding: 96px 56px 96px 80px;
    display: grid;
    grid-template-columns: 220px 1fr;
    column-gap: 48px;
    align-items: start;
  }
  .sb__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 0;
  }
  .sb__num { font-size: 84px; }
  .sb__h3 {
    font-size: clamp(32px, 3.2vw, 44px);
    margin-bottom: 24px;
    max-width: 24ch;
  }
  .sb__body { font-size: 16px; }
  .sb__ghost { font-size: 22vw; left: 6vw; }
  .sb__aim { right: 56px; bottom: 56px; width: 28px; height: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  .sb__item, .sb__topbar, .sb__title, .sb__sub, .sb__meta {
    opacity: 1; transform: none; transition: none;
  }
}