/* Construction page: 3D house stages, blueprint journey, tower-crane modules, brick wall. Prefix cm-. */
:root { --cm-ink: #1f2933; --cm-orange: #f2711c; --cm-yellow: #f6b81a; --cm-brick: #b5532f; --cm-blue: #1c4f8c; --cm-line: rgba(31, 41, 51, .12); --cm-muted: #5b6672; }

/* ---- 3D house stages ---- */
.cm-site { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; margin-top: 28px; }
.cm-house-scene { height: 420px; perspective: 1100px; display: grid; place-items: end center; padding-bottom: 30px; background: linear-gradient(#eaf3fb 0 72%, #d9cdb4 72%); border-radius: 22px; overflow: hidden; }
.cm-ground { position: relative; width: 340px; height: 300px; transform: rotateY(-22deg) rotateX(4deg); transform-style: preserve-3d; }
.cm-house { position: absolute; inset: 0; }
.cm-part { position: absolute; transition: transform .8s cubic-bezier(.3, 1.3, .5, 1), opacity .5s; opacity: 0; }
.cm-slab { left: 10px; right: 10px; bottom: 0; height: 26px; background: #9aa1a8; border-radius: 3px; box-shadow: 0 -4px 0 #b9bfc5 inset, 14px 10px 0 -2px #7c838a; transform: scaleX(.2); }
.cm-wall { bottom: 26px; height: 140px; background: repeating-linear-gradient(0deg, #c9663f 0 14px, #e8d5c4 14px 16px); transform: scaleY(0); transform-origin: bottom; box-shadow: 12px 0 0 #8e3f22; }
.cm-wall.w1 { left: 30px; width: 130px; }
.cm-wall.w2 { left: 160px; width: 140px; box-shadow: 12px 0 0 #8e3f22; }
.cm-roof { bottom: 166px; height: 96px; background: linear-gradient(#5b6672, #3d4650); clip-path: polygon(50% 0, 100% 100%, 0 100%); transform: translateY(-160px); }
.cm-roof.r1 { left: 14px; width: 302px; }
.cm-roof.r2 { left: 40px; width: 250px; height: 70px; bottom: 166px; background: #6b7682; clip-path: polygon(50% 0, 100% 100%, 0 100%); }
.cm-door { left: 70px; bottom: 26px; width: 46px; height: 82px; background: linear-gradient(#7a4a2a, #5c361d); border-radius: 4px 4px 0 0; transform: scaleY(0); transform-origin: bottom; }
.cm-win { left: 196px; bottom: 82px; width: 74px; height: 54px; background: linear-gradient(135deg, #bfe3ff, #7fb6e6); border: 5px solid #fff; border-radius: 4px; transform: scale(.3); }
.cm-key { right: -20px; top: 20px; width: 64px; height: 64px; border-radius: 50%; background: var(--cm-yellow); box-shadow: 0 10px 20px -8px rgba(0, 0, 0, .3); transform: scale(0) rotate(-40deg); }
.cm-key::before { content: ""; position: absolute; left: 14px; top: 22px; width: 16px; height: 16px; border: 4px solid var(--cm-ink); border-radius: 50%; }
.cm-key::after { content: ""; position: absolute; left: 34px; top: 30px; width: 18px; height: 4px; background: var(--cm-ink); box-shadow: 10px 4px 0 -1px var(--cm-ink), 4px 4px 0 -1px var(--cm-ink); }
.cm-scaffold { position: absolute; right: -18px; bottom: 26px; width: 34px; height: 210px; background: repeating-linear-gradient(0deg, transparent 0 40px, var(--cm-yellow) 40px 44px), linear-gradient(90deg, var(--cm-yellow) 0 4px, transparent 4px 30px, var(--cm-yellow) 30px); opacity: .9; transition: opacity .5s; }
.cm-site[data-stage] .cm-slab { opacity: 1; transform: none; }
.cm-site:is([data-stage="1"], [data-stage="2"], [data-stage="3"], [data-stage="4"]) .cm-wall { opacity: 1; transform: none; }
.cm-site .cm-wall.w2 { transition-delay: .12s; }
.cm-site:is([data-stage="2"], [data-stage="3"], [data-stage="4"]) .cm-roof { opacity: 1; transform: none; }
.cm-site:is([data-stage="3"], [data-stage="4"]) :is(.cm-door, .cm-win) { opacity: 1; transform: none; }
.cm-site[data-stage="4"] .cm-key { opacity: 1; transform: none; }
.cm-site[data-stage="4"] .cm-scaffold { opacity: 0; }

.cm-stage-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.cm-stage-list button { width: 100%; display: flex; align-items: center; gap: 14px; text-align: left; font: inherit; color: var(--cm-ink); padding: 12px 14px; border: 1px solid var(--cm-line); border-radius: 12px; background: #fff; cursor: pointer; transition: border-color .2s, box-shadow .2s, background .2s; }
.cm-stage-list button:hover { border-color: var(--cm-orange); }
.cm-stage-list i { flex: none; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 8px; background: #f1f3f5; font-style: normal; font-weight: 700; }
.cm-stage-list b { display: block; font-size: 16px; }
.cm-stage-list small { display: block; font-size: 13px; color: var(--cm-muted); }
.cm-stage-list button.done i { background: #fde7d6; color: var(--cm-orange); }
.cm-stage-list button[aria-checked="true"] { border-color: var(--cm-orange); background: #fff8f2; box-shadow: 0 10px 24px -16px rgba(242, 113, 28, .8); }
.cm-stage-list button[aria-checked="true"] i { background: var(--cm-orange); color: #fff; }
.cm-pay { margin-top: 18px; padding: 18px; border-radius: 14px; background: var(--cm-ink); color: #fff; }
.cm-pay-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font-size: 14px; color: #c3cbd3; }
.cm-pay-top b { font-size: 26px; color: var(--cm-yellow); }
.cm-pay-bar { height: 12px; margin: 10px 0 12px; border-radius: 6px; background: rgba(255, 255, 255, .12); overflow: hidden; }
.cm-pay-bar i { display: block; height: 100%; width: 0; background: repeating-linear-gradient(45deg, var(--cm-yellow) 0 10px, var(--cm-orange) 10px 20px); transition: width .7s ease; }
.cm-pay p { margin: 0; font-size: 13px; color: #c3cbd3; }

/* ---- Blueprint journey ---- */
.cm-bp { --bp: #1c4f8c; margin-top: 28px; padding: 26px 26px 20px; border-radius: 18px; color: #e6f0fb; background: linear-gradient(rgba(255, 255, 255, .07) 1px, transparent 1px) 0 0 / 24px 24px, linear-gradient(90deg, rgba(255, 255, 255, .07) 1px, transparent 1px) 0 0 / 24px 24px, var(--bp); box-shadow: 0 30px 50px -30px rgba(28, 79, 140, .8); }
.cm-bp-head { display: flex; justify-content: space-between; gap: 12px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; padding-bottom: 14px; border-bottom: 1px dashed rgba(255, 255, 255, .35); }
.cm-bp-head small { opacity: .75; }
.cm-bp-steps { --n: 5; list-style: none; margin: 30px 0 10px; padding: 0; display: grid; grid-template-columns: repeat(var(--n), 1fr); gap: 0; }
.cm-bp-steps li { position: relative; padding: 0 10px; text-align: center; }
.cm-bp-dim { position: absolute; top: 20px; left: 50%; width: 100%; height: 2px; background: #fff; transform: scaleX(0); transform-origin: left; transition: transform .6s ease; }
.cm-bp-steps li:last-child .cm-bp-dim { display: none; }
.cm-bp-dim::after { content: ""; position: absolute; right: -1px; top: -5px; width: 2px; height: 12px; background: #fff; }
.cm-bp-node { position: relative; z-index: 1; width: 42px; height: 42px; margin: 0 auto 12px; display: grid; place-items: center; border-radius: 50%; border: 2px dashed rgba(255, 255, 255, .5); font-family: ui-monospace, Menlo, Consolas, monospace; font-weight: 700; background: var(--bp); transition: border-color .3s, background .3s, color .3s; }
.cm-bp-steps b { display: block; font-size: 15px; opacity: .45; transition: opacity .4s; }
.cm-bp-steps small { display: block; margin-top: 4px; font-size: 13px; opacity: .35; transition: opacity .4s; }
.cm-bp-steps li.is-done .cm-bp-node { border: 2px solid #fff; background: #fff; color: var(--bp); }
.cm-bp-steps li.is-done b { opacity: 1; }
.cm-bp-steps li.is-done small { opacity: .8; }
.cm-bp-steps li.is-done .cm-bp-dim { transform: scaleX(1); }
.cm-bp-replay { display: block; margin: 14px auto 0; font: inherit; font-size: 14px; min-height: 44px; padding: 8px 18px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .35); background: transparent; color: #fff; cursor: pointer; }
.cm-bp-replay:hover { background: rgba(255, 255, 255, .1); }

/* ---- Tower-crane modules ---- */
.cm-crane { margin-top: 28px; }
.cm-crane-tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.cm-crane-tabs button { font: inherit; font-size: 14px; min-height: 44px; padding: 8px 18px; border-radius: 999px; border: 1px solid var(--cm-line); background: #fff; color: var(--cm-ink); cursor: pointer; transition: background .2s, color .2s; }
.cm-crane-tabs button[aria-selected="true"] { background: var(--cm-yellow); border-color: var(--cm-yellow); font-weight: 600; }
.cm-crane-stage { position: relative; height: 470px; margin-top: 18px; border-radius: 22px; background: linear-gradient(#eef4f9 0 86%, #d9cdb4 86%); overflow: hidden; }
.cm-tower { position: absolute; inset: 0; pointer-events: none; }
.cm-mast { position: absolute; left: 10%; top: 40px; bottom: 14%; width: 30px; background: linear-gradient(45deg, transparent 45%, var(--cm-yellow) 45% 55%, transparent 55%) 0 0 / 30px 30px, linear-gradient(-45deg, transparent 45%, var(--cm-yellow) 45% 55%, transparent 55%) 0 0 / 30px 30px; border-left: 4px solid var(--cm-yellow); border-right: 4px solid var(--cm-yellow); }
.cm-jib { position: absolute; left: 4%; right: 6%; top: 36px; height: 18px; background: linear-gradient(45deg, transparent 45%, var(--cm-yellow) 45% 55%, transparent 55%) 0 0 / 18px 18px; border-top: 4px solid var(--cm-yellow); border-bottom: 4px solid var(--cm-yellow); }
.cm-cab { position: absolute; left: calc(10% - 6px); top: 58px; width: 42px; height: 30px; border-radius: 4px; background: var(--cm-ink); box-shadow: 8px 6px 0 -2px #8ab4dc inset; }
.cm-hook { position: absolute; left: 58%; top: 50px; width: min(440px, 64%); transform: translateX(-50%); transition: transform .3s; }
.cm-rope { display: block; width: 2px; height: 40px; margin: 0 auto; background: var(--cm-ink); transform-origin: top; transition: height .6s ease; }
.cm-rope::after { content: ""; display: block; width: 16px; height: 14px; margin: 40px 0 0 -7px; border: 3px solid var(--cm-ink); border-top: 0; border-radius: 0 0 10px 10px; }
.cm-crate { position: relative; margin-top: -2px; padding: 20px 22px; border-radius: 10px; background: #fff; border: 3px solid #c48a3a; box-shadow: 0 24px 34px -24px rgba(0, 0, 0, .45); transform-origin: 50% -40px; animation: cm-drop .9s cubic-bezier(.3, 1.4, .5, 1); }
.cm-crate::before, .cm-crate::after { content: ""; position: absolute; top: -42px; width: 2px; height: 44px; background: var(--cm-ink); }
.cm-crate::before { left: 50%; transform: rotate(32deg); transform-origin: top; }
.cm-crate::after { left: 50%; transform: rotate(-32deg); transform-origin: top; }
.cm-crate small { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--cm-orange); }
.cm-crate h3 { margin: 6px 0 12px; font-size: 21px; }
.cm-crate ul { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; }
.cm-crate li { position: relative; padding-left: 20px; font-size: 14px; }
.cm-crate li::before { content: ""; position: absolute; left: 0; top: 6px; width: 10px; height: 10px; background: var(--cm-yellow); transform: rotate(45deg); }
@keyframes cm-drop { 0% { transform: translateY(-120px) rotate(-4deg); opacity: 0; } 60% { transform: translateY(8px) rotate(2deg); opacity: 1; } 100% { transform: none; } }

/* ---- Brick wall ---- */
.cm-bricks { --n: 4; list-style: none; margin: 32px 0 0; padding: 0 0 14px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; position: relative; }
.cm-bricks::after { content: ""; position: absolute; left: -8px; right: -8px; bottom: 0; height: 10px; border-radius: 3px; background: #9aa1a8; }
.cm-bricks li { position: relative; padding: 20px 22px; border-radius: 6px; color: #fff; background: linear-gradient(160deg, #c9663f, #a44a27); box-shadow: 0 -3px 0 rgba(0, 0, 0, .15) inset, 0 3px 0 rgba(255, 255, 255, .15) inset; transform: translateY(-60px); opacity: 0; transition: transform .7s cubic-bezier(.3, 1.4, .5, 1), opacity .4s; transition-delay: calc(var(--i) * 180ms); }
.cm-bricks li:nth-child(4n+1), .cm-bricks li:nth-child(4n+2) { margin-right: 6%; }
.cm-bricks li:nth-child(4n+3), .cm-bricks li:nth-child(4n+4) { margin-left: 6%; }
.cm-bricks.in li { transform: none; opacity: 1; }
.cm-bricks small { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: #ffd9c4; }
.cm-bricks h3 { margin: 6px 0 4px; font-size: 18px; color: #fff; }
.cm-bricks p { margin: 0; font-size: 14px; color: #fde9de; }

@media (max-width: 900px) {
    .cm-site { grid-template-columns: 1fr; gap: 24px; }
    .cm-bp-steps { grid-template-columns: 1fr; gap: 18px; }
    .cm-bp-steps li { display: grid; grid-template-columns: 42px 1fr; column-gap: 14px; text-align: left; align-items: center; }
    .cm-bp-node { margin: 0; grid-row: span 2; }
    .cm-bp-dim { top: 44px; left: 20px; width: 2px; height: calc(100% - 8px); transform: scaleY(0); transform-origin: top; }
    .cm-bp-steps li.is-done .cm-bp-dim { transform: scaleY(1); }
    .cm-bp-dim::after { display: none; }
}
@media (max-width: 560px) {
    .cm-house-scene { height: 330px; }
    .cm-ground { transform: rotateY(-18deg) scale(.8); transform-origin: bottom center; }
    .cm-crane-stage { height: auto; min-height: 440px; padding-bottom: 60px; }
    .cm-hook { position: relative; left: auto; top: auto; width: auto; margin: 54px 14px 0 64px; transform: none; }
    .cm-crate ul { grid-template-columns: 1fr; }
    .cm-bricks { grid-template-columns: 1fr; }
    .cm-bricks li:nth-child(n) { margin: 0; }
    .cm-bricks li:nth-child(even) { margin-left: 8%; }
}
@media (prefers-reduced-motion: reduce) {
    .cm-crate { animation: none; }
    .cm-bricks li, .cm-part { transition: none; }
}