/* Seção 4 — As portas: o corredor do sexto andar, três portas de madeira com placa dourada */
.portas-fundo { position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(60% 40% at 50% 62%, oklch(0.9 0.06 75 / .8), transparent 70%),
    linear-gradient(180deg in oklch, oklch(0.94 0.03 60), oklch(0.87 0.045 55) 78%, oklch(0.8 0.05 50)); }
.portas-abre { text-align: center; }
.portas-abre .h2 { margin-top: .8rem; }
.portas-apoio { margin-top: .9rem; color: var(--tinta-2); }
.portas-lista { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.2rem, 3.5vw, 3.5rem); margin-top: clamp(2.2rem, 5vw, 4rem); perspective: 1800px; padding: 0 clamp(0rem, 2vw, 2rem); border-bottom: 5px solid rgba(91,53,23,.5); }
.portas-lista + .portas-chao { height: clamp(2.6rem, 5vw, 4.2rem); background: linear-gradient(180deg, rgba(122,74,34,.22), transparent); margin: 0 calc(-1 * var(--margem)); }
.porta { position: relative; aspect-ratio: 1 / 1.3; background: #5b3517; padding: 10px 10px 0; border-radius: 4px 4px 0 0; box-shadow: 0 -2px 0 #6f431f inset; }
.porta::after { content: ""; position: absolute; top: calc(100% + 5px); left: 3%; right: 3%; height: clamp(2.2rem, 4.4vw, 3.8rem); pointer-events: none;
  background: linear-gradient(to bottom, rgba(255,232,180,.85), rgba(255,232,180,0)); clip-path: polygon(6% 0, 94% 0, 100% 100%, 0 100%); opacity: .55; transition: opacity .8s ease; }
.porta:hover::after, .porta:focus-within::after, .porta.aberta::after { opacity: 1; }
.porta-dentro { height: 100%; padding: clamp(1.2rem, 2.4vw, 2.2rem); display: flex; flex-direction: column; justify-content: center; gap: .9rem;
  padding-bottom: clamp(3.4rem, 5vw, 4.6rem); position: relative;
  background: radial-gradient(90% 70% at 50% 20%, var(--luz), oklch(0.94 0.045 72) 70%, oklch(0.9 0.05 58)); }
.porta-dentro::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: clamp(2.4rem, 3.6vw, 3.4rem); opacity: .9;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 240 60' preserveAspectRatio='xMidYMax meet'%3E%3Cpath d='M6 60V34l22-16 22 16v26z' fill='%23a6ddd7'/%3E%3Cpath d='M56 60V22l24-18 24 18v38z' fill='%23f4b6c8'/%3E%3Cpath d='M52 24l28-21 28 21' fill='none' stroke='%23dba56c' stroke-width='4'/%3E%3Cpath d='M110 60V26l12-12 12 12v34z' fill='%23ecd24a'/%3E%3Ccircle cx='122' cy='30' r='5' fill='%23fff3d6'/%3E%3Cpath d='M138 60V38l10-9 10 9v22z' fill='%23dba56c'/%3E%3Cpath d='M166 60V30l20-15 20 15v30z' fill='%23b6dcec'/%3E%3Cpath d='M212 60V40l12-9 12 9v20z' fill='%23cdbfe6'/%3E%3C/svg%3E") center bottom / auto 100% repeat-x; }
.porta-dentro p { font-size: .96rem; line-height: 1.5; }
.porta-folha { position: absolute; inset: 10px 10px 0; border: 0; cursor: pointer; font: inherit; color: var(--tinta); display: block; width: calc(100% - 20px);
  background: repeating-linear-gradient(90deg, rgba(0,0,0,.045) 0 2px, transparent 2px 9px), linear-gradient(100deg, #a4622f, #8a4f24 55%, #98592a);
  transform-origin: 0 50%; transform: rotateY(-14deg); transition: transform 1s var(--pisa); box-shadow: inset 0 0 0 10px rgba(0,0,0,.05); backface-visibility: hidden; }
.porta-folha::before, .porta-folha::after { content: ""; position: absolute; left: 9%; right: 9%; border-radius: 3px; box-shadow: inset 2px 2px 4px rgba(0,0,0,.28), inset -1px -1px 0 rgba(255,220,170,.22), 0 1px 0 rgba(255,220,170,.18); background: rgba(0,0,0,.04); }
.porta-folha::before { top: 12%; height: 42%; } .porta-folha::after { top: 60%; bottom: 7%; }
.porta-abrir { position: absolute; right: 12.5%; top: 55.6%; font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; font-weight: 700; color: #f6e2c2; z-index: 1; }
.porta:hover .porta-folha, .porta:focus-within .porta-folha, .porta.aberta .porta-folha { transform: rotateY(-104deg); }
.porta-num { position: absolute; z-index: 1; top: 4.2%; left: 50%; translate: -50% 0; font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; color: #f1dcc0; font-weight: 600; }
.porta-placa { position: absolute; z-index: 1; left: 15%; right: 15%; top: 22%; padding: 1.1rem 1rem; text-align: center; font-family: var(--f-titulo); font-size: clamp(1rem, 1.55vw, 1.4rem); line-height: 1.2;
  background: linear-gradient(135deg, #f0dba6, #c79f4f 50%, #ecd08e); box-shadow: 0 2px 0 rgba(255,255,255,.4) inset, 0 6px 14px -6px rgba(0,0,0,.6); border-radius: 3px; }
.porta-macaneta { position: absolute; z-index: 1; right: 5%; top: 55.4%; width: 14px; height: 14px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #fff0c0, #a67c2e); box-shadow: 0 3px 5px rgba(0,0,0,.5); }

.portas-tambem { margin: clamp(1.4rem, 3vw, 2.4rem) auto 0; max-width: 52rem; text-align: center; }
.portas-tambem ul { list-style: none; padding: 0 1rem; display: flex; justify-content: center; gap: .5rem; flex-wrap: wrap; }
.portas-tambem li { background: var(--papel); border-radius: 8px 8px 0 0; padding: .6rem .9rem .5rem; font-weight: 600; font-size: .88rem; box-shadow: 0 -8px 24px -14px rgba(80,50,20,.4); }
.portas-tambem p { margin-top: 1.3rem; }

@media (max-width: 900px) {
  .portas-abre { text-align: left; }
  .portas-lista { grid-template-columns: 1fr; perspective: none; gap: 1.3rem; }
  .porta { aspect-ratio: auto; padding: 8px 8px 0; display: flex; flex-direction: column-reverse; }
  .porta-folha { position: relative; inset: auto; width: 100%; transform: none !important; padding: 1.6rem 1rem 1.1rem; cursor: default; }
  .porta-num { position: relative; left: auto; top: auto; translate: none; display: block; margin-bottom: .6rem; }
  .porta-placa { position: relative; inset: auto; left: auto; right: auto; top: auto; display: block; font-size: 1.1rem; margin: 0 1.6rem 0 .4rem; }
  .porta-macaneta { top: auto; bottom: .9rem; right: .9rem; } .porta-abrir { display: none; }
  .porta-folha::before { top: 8%; height: auto; bottom: 8%; left: 3%; right: 3%; } .porta-folha::after { display: none; }
  .porta::after { display: none; }
  .portas-lista { border-bottom: 0; padding: 0; } .portas-chao { display: none; }
  .porta-dentro { padding: 1.4rem 1.2rem 4rem; }
  .portas-tambem li { border-radius: 8px; font-size: .8rem; }
}
@media (prefers-reduced-motion: reduce) { .porta-folha { transition: none; } }