/* 3D framing model page. Builds on site.css. */
.framing .topbar { position: relative; }

.fm { display: grid; grid-template-columns: minmax(0, 1fr) 392px; height: calc(100vh - 63px); height: calc(100dvh - 63px); min-height: 560px; background: var(--ink); color: var(--paper); }
.fm__stage { position: relative; overflow: hidden; min-width: 0; background: #1a1510; }
#scene { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; outline: none; }
#scene:focus-visible { outline: 3px solid var(--tape); outline-offset: -3px; }
.fm__overlay { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }

.fm__head { position: absolute; left: 1.25rem; top: 1rem; pointer-events: none; max-width: calc(100% - 2.5rem); }
.fm__head h1 { font: 400 clamp(1.75rem, 3.2vw, 2.9rem)/1.05 var(--display); text-transform: uppercase; letter-spacing: .01em; text-shadow: 0 2px 14px rgba(0, 0, 0, .55); }
.fm__head h1 span { color: var(--orange); }
.fm__hint { margin-top: .4rem; font-size: .9375rem; color: var(--on-dark-muted); transition: opacity .4s; text-shadow: 0 1px 8px rgba(0, 0, 0, .8); }
.fm__hint b { color: var(--tape); font-weight: 600; }
.fm__hint.is-gone { opacity: .55; }
.is-walking .fm__head { display: none; }

.fm__tools { position: absolute; left: 1.25rem; bottom: 1rem; right: 1.25rem; display: flex; flex-wrap: wrap; gap: .35rem; align-items: center; pointer-events: none; }
.fm__tools > * { pointer-events: auto; }
.tool { min-height: 40px; padding: .35rem .8rem; background: rgba(22, 18, 14, .86); color: var(--paper); border: 1px solid var(--bark-2); font: 600 1.0625rem/1 var(--cond); text-transform: uppercase; letter-spacing: .05em; cursor: pointer; backdrop-filter: blur(3px); transition: background-color .12s, border-color .12s, color .12s; }
.tool:hover { border-color: var(--tape); color: var(--tape); }
.tool[aria-pressed=true], .tool[aria-expanded=true] { background: var(--tape); border-color: var(--tape); color: var(--ink); }
.tool__sep { width: 1px; height: 26px; background: var(--bark-2); margin: 0 .3rem; }
.tool__pop { position: relative; }
.layers { position: absolute; left: 0; bottom: calc(100% + .4rem); min-width: 13rem; padding: .5rem; background: var(--ink); border: 1px solid var(--bark-2); z-index: 5; }
.layer { display: flex; align-items: center; gap: .6rem; min-height: 38px; padding: 0 .4rem; font-weight: 500; cursor: pointer; }
.layer:hover { background: var(--bark); }
.layer input { width: 19px; height: 19px; margin: 0; accent-color: var(--orange); }

.fm__tip { position: absolute; left: 0; top: 0; z-index: 3; padding: .2rem .55rem; background: var(--tape); color: var(--ink); font: 700 1rem/1.25 var(--cond); text-transform: uppercase; letter-spacing: .04em; pointer-events: none; white-space: nowrap; }

.lbl { position: absolute; left: 0; top: 0; max-width: 15rem; padding: .16rem .45rem; margin-top: -6px; background: rgba(22, 18, 14, .92); color: var(--paper); border: 1px solid var(--kraft); font: 600 .9375rem/1.2 var(--cond); letter-spacing: .03em; text-transform: uppercase; white-space: nowrap; }
button.lbl { pointer-events: auto; cursor: pointer; }
button.lbl:hover { background: var(--tape); border-color: var(--tape); color: var(--ink); }
.lbl::after { content: ""; position: absolute; left: 50%; top: 100%; width: 1px; height: 7px; background: var(--kraft); }
.lbl--dim { background: var(--tape); color: var(--ink); border-color: var(--tape); white-space: normal; width: max-content; text-align: center; }
.lbl--dim::after { background: var(--tape); }

.walkpad { position: absolute; right: 1rem; top: 1rem; display: grid; gap: .55rem; justify-items: center; padding: .7rem; background: rgba(22, 18, 14, .88); border: 1px solid var(--bark-2); max-width: 12.5rem; }
.walkpad__txt { font-size: .875rem; line-height: 1.3; color: var(--on-dark-muted); text-align: center; }
.walkpad__btns { display: grid; grid-template-columns: repeat(3, 42px); grid-template-rows: repeat(2, 42px); gap: 4px; }
.walkpad__btns button { background: var(--bark-2); color: var(--paper); border: 0; font-size: .9rem; cursor: pointer; touch-action: none; }
.walkpad__btns button:hover, .walkpad__btns button:active { background: var(--orange); color: var(--ink); }
.walkpad__btns [data-walk=f] { grid-column: 2; }
.walkpad__btns [data-walk=l] { grid-column: 1; grid-row: 2; }
.walkpad__btns [data-walk=b] { grid-column: 2; grid-row: 2; }
.walkpad__btns [data-walk=r] { grid-column: 3; grid-row: 2; }

.nogl { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; padding: 2rem; background: var(--bark); z-index: 6; }
.nogl h2 { font-size: 2rem; margin-bottom: .75rem; }
.nogl a { color: var(--tape); }
[hidden] { display: none !important; }

/* Panel */
.fm__panel { display: flex; flex-direction: column; min-height: 0; background: var(--paper); color: var(--ink); border-left: 1px solid var(--bark-2); }
.tabs { display: grid; grid-template-columns: repeat(4, 1fr); flex: none; background: var(--ink); gap: 1px; border-bottom: 4px solid var(--orange); }
.tabs button { min-height: 48px; padding: .25rem; background: var(--bark); color: var(--paper); border: 0; font: 700 1.0625rem/1.05 var(--cond); text-transform: uppercase; letter-spacing: .04em; cursor: pointer; }
.tabs button:hover { background: var(--bark-2); color: var(--tape); }
.tabs button[aria-selected=true] { background: var(--orange); color: var(--ink); }
.tabs button:focus-visible { outline-offset: -4px; outline-color: var(--paper); }
.fm__body { flex: 1; min-height: 0; overflow-y: auto; padding: 1.1rem 1.25rem 1.5rem; }
.fm__body:focus { outline: none; }

.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.guidelink { display: block; margin-top: .5rem; font-weight: 600; color: var(--orange-dark); text-underline-offset: 3px; }
.guidelink:hover { color: var(--ink); }
.panel__intro { color: var(--muted); margin-bottom: .75rem; line-height: 1.4; }
.panel__note { margin-top: 1rem; padding-top: .8rem; border-top: 1px solid var(--line); font-size: .9375rem; line-height: 1.4; color: var(--muted); }
.search { width: 100%; min-height: 44px; padding: .5rem .7rem; font: 400 1rem/1.3 var(--body); color: var(--ink); background: #fff; border: 2px solid #8d7c66; border-radius: 0; margin-bottom: 1rem; }
.search:focus-visible { outline: 3px solid var(--orange); outline-offset: 1px; }
.startbox { padding: .85rem 1rem 1rem; margin-bottom: 1rem; background: var(--ink); color: var(--paper); border-top: 5px solid var(--orange); }
.startbox h3 { font-size: 1.3125rem; margin-bottom: .2rem; }
.startbox p { line-height: 1.35; margin-bottom: .65rem; color: #e4d9c7; font-size: .9688rem; }
.seenline { font: 600 .9375rem/1.2 var(--cond); letter-spacing: .03em; text-transform: uppercase; color: var(--muted); }
details.sys { margin: 0; border-bottom: 1px solid var(--line); }
.sys summary { display: flex; justify-content: space-between; align-items: center; min-height: 44px; padding: .35rem 1.7rem .35rem 0; font: 700 1.1875rem/1.15 var(--cond); text-transform: uppercase; letter-spacing: .05em; color: var(--orange-dark); }
.sys summary::after { top: .9rem; right: .3rem; width: .55rem; height: .55rem; }
.sys[open] summary::after { transform: translateY(.2rem) rotate(-135deg); }
.sys__count { font-weight: 600; font-size: .9375rem; color: var(--muted); letter-spacing: .02em; }
.sys > p { padding: 0; font-size: .9375rem; line-height: 1.3; color: var(--muted); margin-bottom: .3rem; }
.sys ul { margin-bottom: .6rem; }
.sys li:last-child .partbtn { border-bottom: 0; }
.partbtn { display: block; width: 100%; min-height: 38px; padding: .3rem .55rem; text-align: left; background: transparent; border: 0; border-bottom: 1px solid var(--line); font: 500 1.0156rem/1.2 var(--body); color: var(--ink); cursor: pointer; }
.partbtn:hover { background: var(--ink); color: var(--paper); }
.partbtn.is-seen::before { content: ""; display: inline-block; width: .32rem; height: .62rem; margin: 0 .5rem .1rem .05rem; border: solid #5c7a1a; border-width: 0 2px 2px 0; transform: rotate(40deg); }
.partbtn.is-seen:hover::before { border-color: var(--tape); }

.eyebrowp { font: 700 1rem/1.2 var(--cond); text-transform: uppercase; letter-spacing: .09em; color: var(--orange-dark); margin-bottom: .2rem; }
.card__top { display: flex; justify-content: space-between; align-items: center; margin-bottom: .7rem; }
.textbtn { padding: .35rem 0; background: none; border: 0; font: 600 1rem/1.2 var(--body); color: var(--orange-dark); cursor: pointer; text-underline-offset: 3px; }
.textbtn:hover { text-decoration: underline; color: var(--ink); }
.card__nav { display: flex; gap: .3rem; }
.iconbtn { width: 38px; height: 38px; background: #fffaf0; border: 1px solid var(--line); font-size: 1.5rem; line-height: 1; color: var(--ink); cursor: pointer; }
.iconbtn:hover { background: var(--ink); color: var(--paper); }
.card__title { font: 400 clamp(1.8rem, 2.4vw, 2.25rem)/1.08 var(--display); text-transform: uppercase; letter-spacing: .01em; margin-bottom: .35rem; }
.card__title:focus { outline: none; }
.aka { font-size: .9375rem; line-height: 1.35; color: var(--muted); }
.size { display: inline-block; margin-top: .45rem; padding: .18rem .5rem; background: var(--tape); font: 700 .9688rem/1.25 var(--cond); letter-spacing: .03em; }
.card__acts { display: flex; flex-wrap: wrap; gap: .4rem; margin: .8rem 0 .3rem; }
.card__acts .btn--ghost, .stepnav .btn--ghost { color: var(--ink); border-color: var(--ink); }
.card__acts .btn--ghost:hover, .stepnav .btn--ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn[disabled] { opacity: .4; cursor: not-allowed; }
.fact { margin-top: .95rem; }
.fact h4 { margin: 0 0 .15rem; font: 700 1.0625rem/1.2 var(--cond); text-transform: uppercase; letter-spacing: .05em; }
.fact p { line-height: 1.42; font-size: 1rem; }
.fact--tip, .fact--warn { padding: .7rem .8rem; background: #fffaf0; border-left: 5px solid var(--tape); }
.fact--warn { background: #f9e5da; border-left-color: var(--orange-dark); }
.fact--safe { padding: .7rem .8rem; background: #e7efd5; border-left: 5px solid #5c7a1a; }
.fact .fact__note { margin-top: .25rem; font-size: .875rem; line-height: 1.3; color: var(--muted); }
.btn--next { display: block; width: 100%; margin-top: 1.1rem; text-align: left; }
.tool:disabled { opacity: .45; cursor: not-allowed; border-color: var(--bark-2); color: var(--paper); }
.chipbtns { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .3rem; }
.chipbtn { min-height: 36px; padding: .2rem .6rem; background: transparent; border: 1.5px solid #8d7c66; font: 500 .9375rem/1.2 var(--body); color: var(--ink); cursor: pointer; }
.chipbtn:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.progress { height: 7px; background: var(--paper-2); margin: .3rem 0 .75rem; }
.progress i { display: block; height: 100%; background: var(--orange); transition: width .25s; }
.steptext { line-height: 1.45; }
.stepnav { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: 1rem; }
.steps-mini { margin-top: 1.1rem; border-top: 2px solid var(--ink); }
.stepbtn { display: block; width: 100%; min-height: 34px; padding: .25rem .4rem; text-align: left; background: none; border: 0; border-bottom: 1px solid var(--line); font: 500 .9688rem/1.2 var(--body); color: var(--muted); cursor: pointer; }
.stepbtn:hover { background: var(--paper-2); color: var(--ink); }
.stepbtn.is-done { color: var(--ink); }
.stepbtn.is-on { background: var(--ink); color: var(--paper); font-weight: 700; }
.quiz__ask { font-weight: 500; }
.quiz__clue { font: 600 1.4375rem/1.22 var(--cond); letter-spacing: .01em; text-transform: none; }
.quiz__msg { margin-top: .75rem; padding: .65rem .8rem; line-height: 1.4; font-size: .9688rem; border-left: 5px solid; }
.quiz__msg--ok { background: #e7efd5; border-color: #5c7a1a; }
.quiz__msg--bad { background: #f8ddd5; border-color: var(--error); }
.quiz__msg--hint { background: #fffaf0; border-color: var(--tape); }

/* Guide */
.learn { background: var(--paper); padding-block: clamp(3rem, 7vw, 5rem); }
.learn .section-head { max-width: none; }
.learn .section-head p:last-child { max-width: 46rem; }
.gsys { margin-bottom: 2.5rem; }
.gsys h3 { font: 400 1.9rem/1.1 var(--display); padding-bottom: .4rem; border-bottom: 3px solid var(--ink); margin-bottom: .2rem; }
.gsys > p { color: var(--muted); margin: .4rem 0 1rem; }
.ggrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.gcard { display: flex; flex-direction: column; padding: 1rem 1.1rem; background: #fffaf0; border: 1px solid var(--line); border-top: 4px solid var(--orange); scroll-margin-top: 1rem; }
.gcard h4 { margin: 0 0 .4rem; font: 700 1.3125rem/1.15 var(--cond); text-transform: uppercase; letter-spacing: .02em; }
.gcard p { font-size: .9688rem; line-height: 1.42; margin-bottom: .55rem; }
.gcard a { margin-top: auto; font-weight: 600; font-size: .9375rem; color: var(--orange-dark); text-underline-offset: 3px; }
.gcard a:hover { color: var(--ink); }
.learn--terms { background: var(--paper-2); }
.learn__terms { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: clamp(1.5rem, 4vw, 3.5rem); }
.terms { margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.1rem 1.75rem; }
.terms dt { font: 700 1.1875rem/1.2 var(--cond); text-transform: uppercase; letter-spacing: .02em; }
.terms dd { margin: .1rem 0 0; line-height: 1.42; }
.learn--note { background: var(--ink); color: var(--paper); }
.learn__note { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4.5rem); }
.learn__note h2 { font-size: clamp(1.9rem, 3.4vw, 2.75rem); margin-bottom: .75rem; }
.learn__note p { color: #e4d9c7; margin-bottom: 1.1rem; }
.learn__cta { padding: 1.5rem; background: var(--bark); border-top: 6px solid var(--orange); }

@media (max-width: 1100px) { .ggrid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .fm { grid-template-columns: minmax(0, 1fr) 340px; } }
@media (max-width: 820px) {
  .fm { grid-template-columns: minmax(0, 1fr); grid-template-rows: 54% minmax(0, 1fr); min-height: 620px; }
  .fm__panel { border-left: 0; }
  .fm__head { left: .75rem; top: .6rem; }
  .fm__hint { font-size: .8125rem; }
  .fm__tools { left: .5rem; right: .5rem; bottom: .5rem; gap: .25rem; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  .fm__tools::-webkit-scrollbar { display: none; }
  .tool { flex: none; min-height: 36px; padding: .3rem .6rem; font-size: 1rem; }
  .tool__pop { position: static; flex: none; }
  .layers { left: auto; right: .5rem; bottom: 3rem; }
  .tool__sep { flex: none; }
  .walkpad { top: .5rem; right: .5rem; padding: .5rem; }
  .walkpad__txt { display: none; }
  .fm__body { padding: .9rem 1rem 1.25rem; }
  .learn__terms, .learn__note { grid-template-columns: minmax(0, 1fr); }
  .lbl { font-size: .8125rem; }
}
@media (max-width: 640px) { .ggrid, .terms { grid-template-columns: minmax(0, 1fr); } }