:root{--granite: #e6e8e3;--surface: #ffffff;--ink: #1c2426;--muted: #56615f;--line: #c6ccc4;--serpentine: #2f6b5e;--serpentine-deep: #214d44;--flame: #f08a00;--danger: #a3261b;--accent: var(--serpentine);--accent-ink: #ffffff;--display: "Barlow Condensed", "Arial Narrow", "Roboto Condensed", system-ui, sans-serif;--body: "Barlow", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--pad: 20px;--radius-lg: 14px;--radius-sm: 8px;--bar-h: 250px;color-scheme:light}.mode-fire{--accent: var(--flame);--accent-ink: var(--ink)}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;background:var(--granite);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.45;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}img{max-width:100%;display:block}button,input{font:inherit;color:inherit}button{cursor:pointer}:focus-visible{outline:3px solid var(--ink);outline-offset:2px}h1,h2,p{margin:0}.muted{color:var(--muted)}.app{max-width:560px;margin:0 auto;min-height:100dvh;padding:calc(env(safe-area-inset-top) + 12px) var(--pad) 0}.screen{padding-bottom:calc(var(--bar-h) + env(safe-area-inset-bottom))}.actionbar{position:fixed;left:0;right:0;bottom:0;z-index:10;display:grid;gap:10px;max-width:560px;margin:0 auto;padding:14px var(--pad) calc(14px + env(safe-area-inset-bottom));background:linear-gradient(to top,var(--granite) 78%,rgba(230,232,227,0))}.wordmark{font-family:var(--display);font-weight:700;font-size:44px;line-height:.95;letter-spacing:-.01em}.lede{margin-top:8px;font-size:18px;color:var(--muted);max-width:34ch}.screen-title{font-family:var(--display);font-weight:700;font-size:32px;line-height:1.05;margin:8px 0 4px}.section-title{font-family:var(--display);font-weight:600;font-size:24px;margin-bottom:12px}.btn{display:flex;align-items:center;justify-content:center;min-height:58px;padding:0 20px;border-radius:var(--radius-sm);border:2px solid transparent;font-family:var(--display);font-weight:700;font-size:22px;letter-spacing:.01em;transition:transform 80ms ease,opacity .12s ease}.btn:active:not(:disabled){transform:scale(.98)}.btn:disabled{opacity:.5;cursor:default}.btn.primary{background:var(--accent);color:var(--accent-ink)}.btn.secondary{background:var(--surface);border-color:var(--ink)}.btn.quiet{background:transparent;border-color:var(--line);color:var(--ink)}.btn.small{min-height:44px;font-size:18px;padding:0 16px;background:var(--ink);color:#fff}.btn.small.quiet{background:transparent;color:var(--ink)}.splash{min-height:100dvh;display:grid;place-items:center}.pin{padding-top:calc(env(safe-area-inset-top) + 64px)}.pin-input{margin-top:28px;width:100%;height:72px;border:2px solid var(--ink);border-radius:var(--radius-sm);background:var(--surface);font-family:var(--display);font-size:40px;letter-spacing:.3em;text-align:center}.field-error{margin-top:10px;color:var(--danger);font-weight:600}.home{padding-bottom:calc(40px + env(safe-area-inset-bottom))}.home-head{padding:20px 0 24px}.slabs{display:grid;gap:12px}.slab{position:relative;display:flex;flex-direction:column;justify-content:flex-end;min-height:150px;padding:18px 20px;border:0;border-radius:var(--radius-lg);text-align:left;overflow:hidden;clip-path:polygon(0 6%,4% 0,97% 2%,100% 12%,99% 94%,94% 100%,3% 98%,0 90%)}.slab:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;opacity:.22;background-image:radial-gradient(circle at 20% 30%,#fff 0 1px,transparent 2px),radial-gradient(circle at 70% 60%,#fff 0 1px,transparent 2px),radial-gradient(circle at 45% 80%,#fff 0 1.5px,transparent 2.5px);background-size:23px 19px,31px 27px,41px 37px;pointer-events:none}.slab:active{transform:scale(.99)}.slab-water{background:linear-gradient(160deg,var(--serpentine) 0%,var(--serpentine-deep) 100%);color:#fff}.slab-fire{background:linear-gradient(160deg,#2b3537 0%,var(--ink) 100%);color:#fff;box-shadow:inset 0 -8px 0 var(--flame)}.slab-fire .slab-title{color:var(--flame)}.slab-title{position:relative;font-family:var(--display);font-weight:700;font-size:46px;line-height:.95}.slab-sub{position:relative;margin-top:6px;font-size:16px;opacity:.9}.history{margin-top:36px}.history-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}.history-item{display:grid;grid-template-columns:64px 1fr auto;align-items:center;gap:12px;width:100%;padding:8px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);text-align:left}.history-item img{width:64px;height:64px;object-fit:cover;border-radius:6px}.history-meta{display:grid;line-height:1.25;min-width:0}.history-meta strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tag{font-family:var(--display);font-weight:600;font-size:15px;padding:3px 10px;border-radius:99px}.tag-water{background:var(--serpentine);color:#fff}.tag-fire{background:var(--flame);color:var(--ink)}.topbar{display:flex;align-items:center;gap:8px;padding:6px 0 14px;border-bottom:3px solid var(--accent);margin-bottom:16px}.back{min-height:44px;padding:0 12px 0 0;border:0;background:none;font-weight:600;font-size:18px}.topbar-title{flex:1;display:flex;justify-content:space-between;align-items:baseline;gap:8px;min-width:0;font-family:var(--display);font-weight:700;font-size:22px}.topbar-title>span:first-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar-step{font-family:var(--body);font-weight:500;font-size:15px;color:var(--muted);flex-shrink:0}.framing{display:grid;gap:16px;padding:20px;background:var(--surface);border-radius:var(--radius-lg);font-size:18px}.framing-guide{width:100%;max-width:280px;margin:0 auto}.fg-frame{fill:var(--granite)}.fg-rock{fill:var(--accent)}.fg-rock2{fill:var(--accent);opacity:.7}.fg-rock3{fill:var(--accent);opacity:.5}.fg-corners{fill:none;stroke:var(--ink);stroke-width:2.5;stroke-linecap:round}.preview{width:100%;max-height:52dvh;object-fit:cover;border-radius:var(--radius-lg);background:var(--line)}.field{display:grid;gap:6px;margin-top:18px;font-weight:600}.field input{height:54px;padding:0 14px;border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);font-weight:400}.field input:focus{border-color:var(--ink);outline:none}.detect{margin-top:16px;padding:16px 18px;border-left:6px solid var(--accent);background:var(--surface);border-radius:var(--radius-sm);display:grid;gap:6px}.detect-warn{border-left-color:var(--danger)}.detect-title{font-family:var(--display);font-weight:700;font-size:30px;line-height:1}.detect-tip{color:var(--danger)}.focus-note{margin-bottom:16px}.presets{display:grid;grid-template-columns:1fr 1fr;gap:10px}.preset{display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-end;min-height:116px;padding:14px;border:2px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);text-align:left}.preset-name{font-family:var(--display);font-weight:700;font-size:28px;line-height:1}.preset-hint{margin-top:4px;font-size:15px;color:var(--muted)}.preset.is-on{border-color:var(--accent);background:var(--accent);color:var(--accent-ink)}.preset.is-on .preset-hint{color:inherit;opacity:.85}.generating{min-height:80dvh;display:grid;place-content:center;justify-items:center;text-align:center;gap:12px}.spinner{width:36px;height:36px;border:4px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .9s linear infinite}.spinner.big{width:72px;height:72px;border-width:6px;margin-bottom:12px}@keyframes spin{to{transform:rotate(360deg)}}.note{margin-bottom:12px;padding:10px 14px;background:var(--surface);border-radius:var(--radius-sm)}.concepts{list-style:none;margin:0;padding:0;display:grid;gap:22px}.concept{background:var(--surface);border-radius:var(--radius-lg);overflow:hidden;border:3px solid transparent}.concept.is-selected{border-color:var(--accent)}.concept-img{position:relative}.concept-img img{width:100%;aspect-ratio:auto;background:var(--line)}.concept-busy{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-content:center;justify-items:center;gap:8px;background:#1c24268c;color:#fff;font-weight:600}.concept-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 10px;padding:12px 12px 4px}.pick{display:flex;align-items:center;gap:10px;min-height:44px;font-family:var(--display);font-weight:700;font-size:21px;flex:1 1 auto}.pick input{width:24px;height:24px;accent-color:var(--accent);flex-shrink:0}.pick span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.concept-btns{display:flex;gap:8px;margin-left:auto}.chips{display:flex;flex-wrap:wrap;gap:8px;padding:8px 12px 14px}.chip{min-height:40px;padding:0 14px;border:1.5px solid var(--ink);border-radius:99px;background:transparent;font-weight:600;font-size:15px}.chip:disabled{opacity:.45}.error{position:sticky;top:calc(env(safe-area-inset-top) + 8px);z-index:20;display:flex;align-items:flex-start;gap:12px;margin-bottom:12px;padding:12px 14px;background:var(--danger);color:#fff;border-radius:var(--radius-sm);font-weight:600}.error span{flex:1}.error-close{border:0;background:none;color:#fff;font-size:18px;min-width:32px;min-height:32px}@media (prefers-reduced-motion: reduce){.spinner{animation-duration:3s}.btn,.slab{transition:none}}.login .field{margin-top:20px}.login .pin-input{margin-top:0}.pass-row{display:flex;gap:8px}.pass-row input{flex:1;min-width:0;height:54px;padding:0 14px;border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);font-weight:400}.pass-row input:focus{border-color:var(--ink);outline:none}.pass-toggle{min-width:72px;border:2px solid var(--line);border-radius:var(--radius-sm);background:transparent;font-weight:600}.login{padding-bottom:calc(var(--bar-h) + env(safe-area-inset-bottom))}.home-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:40px;padding-top:14px;border-top:1px solid var(--line);font-size:15px}.linkish{min-height:44px;border:0;background:none;font-weight:600;text-decoration:underline;text-underline-offset:3px}.counter{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;padding:12px 12px 12px 18px;background:var(--surface);border-radius:var(--radius-sm)}.counter-label{font-weight:600}.counter-ctrl{display:flex;align-items:center;gap:6px}.counter-btn{width:56px;height:56px;border:2px solid var(--ink);border-radius:var(--radius-sm);background:transparent;font-family:var(--display);font-weight:700;font-size:30px;line-height:1}.counter-btn:disabled{opacity:.3}.counter-num{min-width:48px;text-align:center;font-family:var(--display);font-weight:700;font-size:40px}