:root{color:#f4f6f7;font-synthesis:none;text-rendering:optimizelegibility;background:#101317;font-family:Noto Sans Thai,Leelawadee UI,Inter,system-ui,sans-serif}*{box-sizing:border-box}body{background:#101317;min-width:320px;min-height:100vh;margin:0}button,input,select{font:inherit}button{cursor:pointer}.app-shell{min-height:100vh;color:var(--text);background:var(--page);--page:#101317;--panel:#1b2026;--header:#111418f2;--text:#f4f6f7;--muted:#a9b3bf;--subtle:#d3d9df;--border:#343c46;--soft:#252c34;--input:#12171d;--accent:#ff8a35;--accent-strong:#e46a17;--accent-text:#ffb87a;--warning-bg:#35221d;--warning-border:#a55b3b;--warning-text:#ffd5c4;--error-bg:#381f20;--error-text:#ffb7aa;--shadow:0 20px 56px #00000038}.app-shell[data-theme=light]{--page:#f3f5f6;--panel:#fff;--header:#fffffff0;--text:#18222d;--muted:#526072;--subtle:#35485b;--border:#d8e0e6;--soft:#edf1f4;--input:#fff;--accent:#dc641c;--accent-strong:#b74c1c;--accent-text:#a8431a;--warning-bg:#fff1ec;--warning-border:#e3a58e;--warning-text:#7c2f19;--error-bg:#fff8f5;--error-text:#9c2f1b;--shadow:0 18px 50px #24303f14}.site-header{z-index:10;border-bottom:1px solid var(--border);background:var(--header);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);justify-content:space-between;align-items:center;min-height:70px;padding:0 4vw;display:flex;position:sticky;top:0}.brand{color:var(--text);letter-spacing:.01em;align-items:center;gap:12px;font-size:1.05rem;font-weight:800;text-decoration:none;display:inline-flex}.brand-symbol{color:#fff;background:var(--accent-strong);letter-spacing:.08em;border-radius:11px;place-items:center;width:38px;height:38px;font-size:.76rem;display:grid}.top-controls,.segmented-control,.language-control,.header-actions,.theme-control{align-items:center;display:flex}.top-controls{gap:16px}.header-actions{gap:18px}.theme-control{border:1px solid var(--border);background:var(--soft);border-radius:999px;gap:3px;padding:3px}.theme-control button{min-width:52px;color:var(--muted);background:0 0;border:0;border-radius:999px;padding:6px 10px;font-size:.76rem;font-weight:800}.theme-control button[aria-pressed=true]{color:#151b20;background:var(--accent)}.segmented-control{background:var(--soft);border-radius:10px;padding:3px}.segmented-control button,.language-control button{color:var(--muted);background:0 0;border:0}.segmented-control button{border-radius:8px;padding:7px 11px;font-size:.84rem}.segmented-control button.is-active{color:var(--text);background:var(--panel);box-shadow:0 1px 4px #0000001f}.language-control{gap:7px;font-size:.88rem}.language-control button{padding:5px 2px}.language-control button.is-active{color:var(--accent-text);font-weight:800}main{width:min(1560px,94vw);margin:0 auto;padding:26px 0 64px}.hero{grid-template-columns:minmax(0,1fr);align-items:center;margin-bottom:40px;padding:25px 0;display:grid;position:relative}.hero:before{z-index:0;content:"";pointer-events:none;background:radial-gradient(circle at 63% 44%,#ff8a351a,#0000 34%),linear-gradient(#78899b0a 1px,#0000 1px) 0 0/42px 42px,linear-gradient(90deg,#78899b0a 1px,#0000 1px) 0 0/42px 42px;position:absolute;inset:-26px -3vw -20px}.hero>*{z-index:1;position:relative}.hero-copy{max-width:580px}.hero-lead{max-width:29ch;font-size:clamp(1.2rem,2.1vw,1.65rem);font-weight:750;line-height:1.4}.hero-detail{max-width:46ch;color:var(--muted);line-height:1.6}.hero-action{color:#171b1e;background:var(--accent);border-radius:999px;align-items:center;gap:18px;margin-top:22px;padding:14px 19px;font-weight:850;text-decoration:none;display:inline-flex}.hero-action:hover{background:#ffa35a}.hero-microcopy{color:var(--muted);letter-spacing:.12em;margin-top:20px;font-size:.72rem;font-weight:800}.workspace-section{scroll-margin-top:92px}.workspace-intro{margin-bottom:19px}.workspace-intro h2{letter-spacing:-.04em;margin:0;font-size:clamp(1.6rem,3vw,2.4rem)}.hero-action:focus-visible,.theme-control button:focus-visible,.spring-type-selector button:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.spring-type-selector{flex-wrap:wrap;gap:8px;margin-bottom:20px;display:flex}.spring-type-selector button{border:1px solid var(--border);min-height:43px;color:var(--subtle);background:var(--panel);border-radius:11px;padding:9px 13px;font-weight:750}.spring-type-selector button.is-active{border-color:var(--accent);color:#151b20;background:var(--accent)}.spring-type-selector button:disabled{color:var(--muted);background:var(--soft);cursor:not-allowed}.spring-type-selector small{font-size:.64rem;font-weight:500;display:block}.spring-type-selector button{text-align:left;grid-template-rows:auto auto;grid-template-columns:auto auto;align-items:center;column-gap:8px;display:inline-grid}.spring-type-selector .spring-glyph{grid-row:1/span 2;width:30px;height:30px}.spring-type-selector button:disabled .spring-glyph{opacity:.6}.spring-glyph{flex:none;width:44px;height:44px;display:block}.spring-glyph .glyph-rear{opacity:.38;stroke-width:1.4px}.spring-glyph .glyph-accent{color:var(--accent-text);stroke:currentColor}.choice-cards{border:0;min-width:0;margin:0;padding:0}.choice-cards legend{color:var(--muted);margin-bottom:8px;padding:0;font-size:.78rem;font-weight:700}.choice-card-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px;display:grid}.choice-card{border:1px solid var(--border);min-height:104px;color:var(--text);background:var(--input);text-align:center;cursor:pointer;border-radius:13px;align-content:start;justify-items:center;gap:3px;padding:8px 6px;display:grid;position:relative}.choice-card input{opacity:0;pointer-events:none;position:absolute}.choice-card:has(input:focus-visible){outline:3px solid var(--accent);outline-offset:2px}.choice-card.is-selected{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent);background:var(--soft)}.choice-card.is-unsupported{color:var(--muted);cursor:not-allowed;border-style:dashed}.choice-card.is-unsupported .spring-glyph{opacity:.55}.choice-card .spring-glyph{width:40px;height:40px}.choice-card-name{font-size:.78rem;font-weight:800;line-height:1.25}.choice-card-alt{color:var(--muted);font-size:.68rem;line-height:1.25}.choice-card-badge{border:1px solid var(--border);color:var(--muted);border-radius:999px;margin-top:3px;padding:2px 7px;font-size:.62rem;font-weight:800}.choice-card-note{color:var(--muted);margin:8px 0 0;font-size:.72rem;line-height:1.5}.input-panel .choice-cards{margin:4px 0 14px}.unsupported-gallery{border:1px dashed var(--border);background:var(--panel);border-radius:12px;margin:-8px 0 20px;padding:10px 14px}.unsupported-gallery summary{color:var(--muted);cursor:pointer;font-size:.8rem;font-weight:800}.unsupported-gallery[open] summary{margin-bottom:10px}.unsupported-gallery .choice-card-grid{grid-template-columns:repeat(auto-fill,minmax(150px,190px))}.extension-field-note{color:var(--muted);margin:0 0 16px;font-size:.75rem;line-height:1.5}.extension-end-grid{gap:12px;margin-top:10px;display:grid}.extension-end-section{min-width:0}.extension-end-section .choice-cards{margin-bottom:10px}.extension-end-section .choice-card-grid{grid-template-columns:repeat(auto-fill,minmax(90px,1fr))}.extension-end-fieldset{border:1px solid var(--border);border-radius:12px;min-width:0;margin:0;padding:12px}.extension-end-fieldset legend{padding:0 5px;font-size:.8rem;font-weight:800}.reference-head-inputs{border:1px solid var(--border);border-radius:12px;min-width:0;margin:0;padding:12px}.reference-head-inputs legend{padding:0 5px;font-size:.8rem;font-weight:800}.reference-head-inputs .extension-field-note{margin:0 0 10px}.extension-force-datum{color:var(--muted);margin-top:3px;font-size:.7rem;line-height:1.4;display:block}.extension-rate-comparison{border:1px solid var(--border);border-radius:12px;margin-top:16px;padding:12px}.extension-rate-comparison summary{cursor:pointer;font-size:.84rem;font-weight:800}.extension-rate-comparison[open] summary{margin-bottom:12px}.extension-measure-confirm{align-items:flex-start;gap:8px;margin:12px 0;font-size:.75rem;line-height:1.5;display:flex}.extension-measure-confirm input{flex:none;width:auto;margin-top:2px}.extension-rate-comparison>button{border:1px solid var(--accent);min-height:40px;color:var(--text);background:var(--panel);border-radius:9px;padding:7px 12px;font-size:.78rem;font-weight:800}.extension-rate-comparison>button:disabled{border-color:var(--border);color:var(--muted);cursor:not-allowed}.extension-rate-comparison>button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.extension-measure-result{border:1px solid var(--border);border-radius:10px;margin-top:12px;padding:12px}.extension-measure-result p{flex-wrap:wrap;justify-content:space-between;gap:6px;margin:0 0 8px;font-size:.76rem;display:flex}.extension-measure-result .extension-field-note{margin-top:10px;display:block}.torsion-measured-rate{border:1px solid var(--border);border-radius:12px;margin-top:16px;padding:12px}.torsion-measured-rate summary{cursor:pointer;font-size:.84rem;font-weight:800}.torsion-measured-rate[open] summary{margin-bottom:12px}.torsion-measure-note{color:var(--muted);font-size:.75rem;line-height:1.5}.torsion-measure-confirm{align-items:flex-start;gap:8px;margin:12px 0;font-size:.75rem;line-height:1.5;display:flex}.torsion-measure-confirm input{flex:none;width:auto;margin-top:2px}.torsion-measure-result{border:1px solid var(--border);border-radius:9px;padding:10px;font-size:.78rem}.torsion-measure-warning{font-size:.75rem;font-weight:800;line-height:1.5}.hook-reference-viewer{gap:12px;min-width:0;display:grid}.hook-reference-cards{gap:12px;display:grid}.reference-no-results{align-content:start;gap:14px;display:grid}.twist-controls{border:1px solid var(--border);border-radius:12px;gap:10px;margin:0;padding:12px 14px;display:grid}.twist-controls legend{color:var(--subtle);padding:0 6px;font-size:.8rem;font-weight:800}.twist-angle-label{color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:6px;font-size:.8rem;font-weight:700;display:flex}.twist-angle-label output{color:var(--accent-text);font-weight:800}.twist-controls input[type=range]{width:100%;accent-color:var(--accent)}.twist-buttons{flex-wrap:wrap;gap:8px;display:flex}.twist-buttons button{border:1px solid var(--border);min-height:38px;color:var(--text);background:var(--soft);border-radius:10px;padding:6px 16px;font-weight:800}.twist-buttons button[aria-pressed=true]{border-color:var(--accent);color:#151b20;background:var(--accent)}.twist-buttons button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.reference-no-results .choice-card-grid{grid-template-columns:repeat(auto-fill,minmax(92px,1fr))}@media (width<=1179px){.workspace-grid.is-reference{grid-template-columns:1fr;grid-template-areas:"preview""results""form"}}.reference-gallery-collection{border:1px solid var(--border);background:var(--panel);border-radius:14px;margin-top:40px}.reference-gallery-collection>summary{color:var(--text);cursor:pointer;padding:16px 20px;font-weight:800}.reference-gallery-collection>summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.reference-gallery-collection[open]{padding-bottom:24px}.reference-gallery-collection>.gallery-section{margin:24px 20px 0}.gallery-section{margin-top:56px;scroll-margin-top:92px}.gallery-warning{border:1px solid var(--warning-border);color:var(--warning-text);background:var(--warning-bg);border-radius:13px;gap:4px;margin-bottom:14px;padding:14px 16px;display:grid}.gallery-warning strong{font-size:1rem}.gallery-warning p{margin:0;font-size:.8rem;line-height:1.5}.gallery-info{border:1px solid var(--border);color:var(--muted);background:var(--soft);border-radius:13px;gap:4px;margin-bottom:14px;padding:14px 16px;display:grid}.gallery-info p{margin:0;font-size:.8rem;line-height:1.5}p.gallery-info{font-size:.8rem;line-height:1.5}.gallery-toggle{border:1px solid var(--accent);min-height:42px;color:var(--text);background:var(--panel);border-radius:11px;padding:8px 16px;font-weight:800}.gallery-toggle:focus-visible,.gallery-views button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.gallery-grid{grid-template-columns:minmax(300px,.9fr) minmax(420px,1.6fr);grid-template-areas:"controls stage""sources sources";align-items:start;gap:18px;margin-top:16px;display:grid}.gallery-controls{grid-area:controls;gap:14px;padding:20px;display:grid}.gallery-stage{grid-area:stage}.gallery-sources{grid-area:sources;padding:14px 18px;font-size:.8rem}.gallery-sources summary{cursor:pointer;font-weight:800}.gallery-sources a{color:var(--accent-text)}.gallery-pairing{color:var(--subtle);margin:0;font-size:.8rem;font-weight:700;line-height:1.5}.gallery-views{flex-wrap:wrap;gap:6px;display:flex}.gallery-views button{border:1px solid var(--border);min-height:34px;color:var(--subtle);background:var(--soft);border-radius:9px;padding:6px 12px;font-size:.78rem;font-weight:700}.gallery-views button[aria-pressed=true]{border-color:var(--accent);color:#151b20;background:var(--accent)}.gallery-stage-warning{color:var(--warning-text);margin:0;font-size:.78rem;font-weight:800}.double-torsion-end-view{border:1px solid var(--border);background:var(--soft);border-radius:10px;align-items:center;gap:10px;min-width:0;margin:8px 0;padding:7px 10px;display:flex}.double-torsion-end-view svg{flex:0 0 100px;width:100px;height:69px}.double-torsion-end-view-copy{min-width:0;color:var(--muted);flex-wrap:wrap;align-items:center;gap:2px 12px;font-size:.72rem;display:flex}.double-torsion-end-view-copy strong{color:var(--text);flex-basis:100%;font-size:.78rem}.double-torsion-end-view-copy span{white-space:nowrap}.double-torsion-end-view-copy small{flex-basis:100%;font-size:.69rem}.end-view-coil{fill:none;stroke:#87929e;stroke-width:2px}.end-view-fixed-leg{stroke:#87929e;stroke-width:5px;stroke-linecap:round}.end-view-rest-arm{stroke:#87929e;stroke-width:4px;stroke-dasharray:3 3;stroke-linecap:round}.end-view-moving-arm{stroke:var(--accent);stroke-width:5px;stroke-linecap:round}.end-view-pivot{fill:var(--accent)}.end-view-key{vertical-align:middle;width:11px;height:3px;margin-right:5px;display:inline-block}.end-view-key.is-moving{background:var(--accent)}.end-view-key.is-fixed{background:#87929e}.gallery-grid.is-single{grid-template-columns:minmax(0,960px);grid-template-areas:"stage";justify-content:center}@media (width<=900px){.gallery-grid{grid-template-columns:1fr;grid-template-areas:"stage""controls""sources"}#extension-hook-gallery .gallery-grid{grid-template-areas:"controls""stage""sources"}}.extension-basis{color:var(--muted);font-size:.78rem;line-height:1.55}.extension-total-row{color:var(--accent-text);font-weight:800}.hero h1{letter-spacing:-.055em;margin:0;font-size:clamp(3.5rem,5.8vw,6.5rem);line-height:.96}.hero>p:not(.eyebrow){color:var(--muted);margin:16px 0 0;font-size:clamp(1rem,2vw,1.25rem)}.eyebrow{color:var(--accent-text);letter-spacing:.18em;margin:0 0 12px;font-size:.74rem;font-weight:800}.workspace-grid{grid-template-columns:minmax(300px,.9fr) minmax(420px,1.35fr) minmax(300px,.9fr);grid-template-areas:"form preview results";align-items:start;gap:18px;display:grid}.panel{border:1px solid var(--border);background:var(--panel);box-shadow:var(--shadow);border-radius:20px;overflow:hidden}.input-panel,.results-panel{padding:22px}.panel-heading{align-items:center;gap:11px;margin-bottom:20px;display:flex}.panel-heading h2{margin:0;font-size:1.08rem}.step-number{width:30px;height:30px;color:var(--accent-text);background:var(--soft);border-radius:50%;place-items:center;font-size:.72rem;font-weight:800;display:inline-grid}.form-grid{grid-template-columns:1fr 1fr;gap:14px;display:grid}.torsion-design-form .form-grid{align-items:start}.torsion-leg-fields{border:1px solid var(--border);border-radius:12px;grid-column:1/-1;gap:14px;padding:12px;display:grid}.form-grid label{color:var(--subtle);gap:7px;font-size:.78rem;font-weight:700;display:grid}.field-label{justify-content:space-between;align-items:center;gap:8px;min-height:36px;display:inline-flex}.field-diagram{border:1px solid var(--border);width:34px;height:34px;color:var(--accent-text);background:var(--soft);border-radius:9px;flex:0 0 34px;padding:3px}.extension-end-fieldset legend .field-label{gap:10px}.form-grid input,.form-grid select{border:1px solid var(--border);width:100%;min-height:44px;color:var(--text);background:var(--input);border-radius:10px;outline:none;padding:9px 11px}.form-grid input:focus,.form-grid select:focus{border-color:var(--accent);box-shadow:0 0 0 3px #d65f2424}.form-grid input[aria-invalid=true]{border-color:var(--warning-border)}.form-grid .visual-field-error{color:var(--warning-text);font-size:.75rem;font-weight:700;line-height:1.4}.span-two{grid-column:1/-1}.workspace-grid>.input-panel{grid-area:form}.workspace-grid>.preview-panel{grid-area:preview}.workspace-grid>.results-panel{grid-area:results}@media (width>=1180px){.workspace-grid>.preview-panel,.workspace-grid>.results-panel{align-self:start;position:sticky;top:86px}.workspace-grid>.results-panel{scrollbar-width:none;max-height:calc(100vh - 100px);overflow-y:auto}.workspace-grid>.results-panel::-webkit-scrollbar{display:none}.workspace-grid .preview-stage{height:clamp(420px,100vh - 330px,640px)}}.preview-panel{gap:14px;padding:22px;display:grid}.preview-panel .panel-heading{margin-bottom:0}.preview-stage{border:1px solid var(--border);color:#132033;background:radial-gradient(at 50% 45%,#eff4f7 0%,#bdc8d1 67%,#8795a1 100%);border-radius:16px;grid-template-rows:auto minmax(0,1fr);height:clamp(400px,56vh,600px);display:grid;overflow:hidden}.app-shell[data-theme=light] .preview-stage{background:radial-gradient(at 50% 45%,#fff 0%,#eef2f5 55%,#dfe5ea 100%)}.preview-stage-bar{border-bottom:1px solid #1320331f;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;padding:10px 10px 8px 12px;display:flex}.preview-viewport{position:relative;overflow:hidden;container-type:inline-size}.press-readout{z-index:4;color:#132033;pointer-events:none;background:#fffffff0;border:1px solid #2c466059;border-radius:9px;gap:3px;width:max-content;max-width:calc(100% - 20px);padding:8px 10px;font-size:.73rem;line-height:1.4;display:grid;position:absolute;top:10px;left:10px;box-shadow:0 2px 10px #1320331f}.press-readout>div{justify-content:space-between;gap:12px;display:flex}.press-readout strong{white-space:nowrap}@container (width<=420px){.preview-viewport:has(.dimension-label) .press-readout{visibility:hidden}}.preview-backdrop{pointer-events:none;color:#2c4660;opacity:.2;position:absolute;inset:0;overflow:hidden}.app-shell[data-theme=light] .preview-backdrop{color:#4b6680;opacity:.13}.spring-blueprint{width:118%;max-width:none;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)rotate(-90deg)}.spring-scene,.spring-canvas{inset:0;position:absolute!important}.spring-canvas{touch-action:none}.dimension-overlay{pointer-events:none;position:absolute;inset:0;overflow:hidden}.preview-status-chip{color:#7c2f19;letter-spacing:.06em;background:#fff1ec;border:1px solid #e3a58e;border-radius:999px;padding:5px 9px;font-size:.7rem;font-weight:800}.preview-toolbar{gap:6px;display:flex}.preview-toolbar button{color:#132033;background:#ffffffeb;border:1px solid #cbd3da;border-radius:9px;min-height:34px;padding:6px 11px;font-size:.78rem;font-weight:700}.preview-toolbar button[aria-pressed=true]{color:#fff;background:#1c3552;border-color:#1c3552}.preview-toolbar button:focus-visible,.preview-fallback button:focus-visible{outline-offset:2px;outline:3px solid #d65f2466}.dimension-label{visibility:hidden;color:#1c3552;white-space:nowrap;pointer-events:none;-webkit-user-select:none;user-select:none;background:#fffffff0;border:1px solid #1c3552;border-radius:6px;padding:2px 7px;font-size:.72rem;font-weight:750;position:absolute;top:0;left:0}.dimension-label.is-accent{color:#a8431a;border-color:#d65f24}.preview-loading,.preview-fallback{color:#526072;text-align:center;place-content:center;justify-items:center;gap:8px;margin:0;padding:24px;display:grid;position:absolute;inset:0}.preview-fallback strong{color:#132033}.preview-fallback p{max-width:32ch;margin:0;font-size:.85rem}.preview-fallback-mark{color:#7a8796;border:2px dashed #a9b5c1;border-radius:12px;place-items:center;width:46px;height:46px;font-size:.8rem;font-weight:800;display:grid}.preview-fallback button{color:#132033;background:#fff;border:1px solid #cbd3da;border-radius:9px;min-height:36px;padding:6px 14px}.preview-facts{grid-template-columns:repeat(3,1fr);gap:8px;margin:0;display:grid}.preview-facts div{background:var(--soft);border-radius:11px;padding:9px 11px}.preview-facts dt{color:var(--muted);font-size:.7rem;font-weight:700}.preview-facts dd{margin:2px 0 0;font-weight:800}.preview-facts small{color:var(--accent-text);letter-spacing:.04em;font-size:.62rem}.preview-note{color:var(--muted);margin:0;font-size:.74rem;line-height:1.55}.extension-assumed-legend:before{content:"";background:#91d9ee;border-radius:50%;width:.8em;height:.8em;margin-right:.4em;display:inline-block}.verification-banner{border:1px solid var(--warning-border);color:var(--warning-text);background:var(--warning-bg);border-radius:13px;gap:12px;margin-bottom:18px;padding:14px;display:flex}.verification-banner strong{display:block}.verification-banner p{margin:2px 0 0;font-size:.78rem}.warning-mark{color:#fff;background:#bc3f20;border-radius:50%;flex:0 0 25px;place-items:center;height:25px;font-weight:900;display:inline-grid}.primary-result{border-block:1px solid var(--border);gap:4px;padding:17px 0;display:grid}.primary-result span{color:var(--muted);font-size:.76rem;font-weight:700}.primary-result strong{letter-spacing:-.04em;font-size:clamp(1.6rem,3vw,2.2rem)}.primary-result .rate-alt{color:var(--muted);font-size:.95rem;font-weight:700}.customer-summary{border:1px solid var(--accent);background:var(--panel);border-radius:13px;margin:12px 0;padding:12px 14px}.customer-summary-head{justify-content:space-between;align-items:center;gap:10px;display:flex}.customer-summary h3{margin:0;font-size:.95rem}.customer-summary button{border:1px solid var(--accent);min-height:36px;color:var(--text);background:var(--soft);border-radius:10px;padding:6px 12px;font-weight:800}.customer-summary ul{gap:4px;margin:8px 0 0;padding-left:18px;font-size:.85rem;line-height:1.45;display:grid}.calculation-basis{border:1px solid var(--border);background:var(--soft);border-radius:13px;margin:16px 0;padding:15px}.calculation-basis h3{margin:0;font-size:.9rem}.basis-units{color:var(--muted);margin:5px 0 12px;font-size:.72rem}.basis-formula{color:var(--subtle);overflow-wrap:anywhere;margin:12px 0;font-size:.82rem;font-weight:800}.basis-values{gap:8px;margin:0;display:grid}.basis-values div{justify-content:space-between;gap:12px;font-size:.76rem;display:flex}.basis-values dt{color:var(--muted)}.basis-values dd{text-align:right;overflow-wrap:anywhere;margin:0;font-weight:750}.result-list{margin:0}.result-list div{border-bottom:1px solid var(--border);justify-content:space-between;gap:18px;padding:12px 0;display:flex}.result-list dt{color:var(--muted)}.result-list dd{text-align:right;margin:0;font-weight:750}.warning-list{color:var(--warning-text);overflow-wrap:anywhere;margin:18px 0 0;padding-left:18px;font-size:.75rem}.error-panel{border-color:var(--warning-border);background:var(--error-bg)}.error-panel h3{color:var(--error-text)}.extension-view-switch{border:1px solid var(--border);background:var(--soft);border-radius:10px;gap:3px;margin:0 0 14px;padding:3px;display:inline-flex}@media (width<=1179px){.hero{grid-template-columns:1fr;gap:20px}.hero h1{font-size:clamp(3.5rem,6vw,5rem)}.workspace-grid{grid-template-columns:1fr;grid-template-areas:"preview""form""results"}.workspace-grid .preview-stage{height:clamp(380px,52vh,520px)}}@media (width<=720px){.site-header{flex-wrap:wrap;align-items:flex-start;gap:14px;padding-block:14px;position:static}.top-controls{flex-wrap:wrap;gap:8px}.header-actions{flex-wrap:wrap;justify-content:flex-end;gap:7px}main{width:min(92vw,620px);padding-top:28px}.hero{margin-bottom:44px}.hero h1{font-size:clamp(3.3rem,12vw,5rem)}.workspace-section{scroll-margin-top:18px}.preview-stage{height:min(112vw,460px)}.preview-backdrop{opacity:.15}.app-shell[data-theme=light] .preview-backdrop{opacity:.1}.spring-blueprint{width:150%}}@media (width<=440px){.site-header{gap:8px}.brand{font-size:.94rem}.brand-symbol{width:33px;height:33px}.header-actions{justify-content:space-between;width:100%}.top-controls{gap:6px}.segmented-control button{padding:6px 8px}.language-control{gap:3px}.theme-control button{min-width:43px;padding:5px 7px}.preview-panel{padding:15px}.form-grid{grid-template-columns:1fr}.span-two{grid-column:auto}}.g-calibration{background:var(--panel)}.g-calibration-material{flex-wrap:wrap;align-items:center;gap:10px;margin:10px 0;font-size:.8rem;display:flex}.g-calibration-material select{width:auto}.g-calibration-sample{border:1px solid var(--border);background:var(--soft);border-radius:12px;min-width:0;margin:12px 0;padding:12px}.g-calibration-sample legend{padding:0 6px;font-size:.78rem;font-weight:800}.g-calibration-sample .form-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.g-sample-result{margin:10px 0 6px;font-size:.8rem;line-height:1.5}.g-calibration button{border:1px solid var(--border);min-height:36px;color:var(--text);background:var(--soft);border-radius:10px;padding:6px 14px;font-weight:800}.g-calibration-summary{border:1px solid var(--border);border-radius:12px;margin-top:12px;padding:12px}.strength-block{border:1px solid var(--border);border-radius:12px;margin-top:16px;padding:12px}.strength-block h3{margin:0 0 8px;font-size:.84rem}.strength-block [role=alert]{color:var(--error-text);font-size:.78rem;font-weight:800}.drawing-open{color:#fff;background:var(--accent-strong);cursor:pointer;border:0;border-radius:10px;width:100%;min-height:42px;margin-top:14px;font-weight:800}.drawing-overlay{z-index:1000;background:#080c10c7;padding:16px;position:fixed;inset:0;overflow:auto}.drawing-toolbar{color:#f4f6f7;flex-wrap:wrap;align-items:center;gap:10px;max-width:1123px;margin:0 auto 12px;font-size:.8rem;display:flex}.drawing-toolbar p{flex:260px;margin:0}.drawing-toolbar button{color:#f4f6f7;cursor:pointer;background:#252c34;border:1px solid #5b6672;border-radius:10px;min-height:40px;padding:8px 18px;font-weight:800}.drawing-toolbar .drawing-save{color:#fff;background:#e46a17;border-color:#e46a17}.drawing-sheet{box-sizing:border-box;color:#17212b;background:#fff;border:2px solid #17212b;flex-direction:column;gap:7px;width:1123px;height:794px;margin:0 auto;padding:14px 18px;font-size:10px;line-height:1.25;display:flex;overflow:hidden}.drawing-header{border-bottom:2px solid #17212b;justify-content:space-between;align-items:flex-start;padding-bottom:5px;display:flex}.drawing-header h3{margin:1px 0 0;font-size:18px}.drawing-issuer{letter-spacing:.08em;text-transform:uppercase;color:#b74c1c;font-size:12px}.drawing-contact{color:#33414f;margin-bottom:4px;font-size:11px;display:block}.drawing-subtitle{color:#526072}.drawing-status{color:#b74c1c;border:2px solid #b74c1c;border-radius:6px;padding:6px 12px;font-weight:800}.drawing-titlebar{border:1px solid #17212b;grid-template-columns:2.2fr 1fr 1fr 1fr;display:grid}.drawing-titlebar>div{border-right:1px solid #17212b;flex-direction:column;padding:4px 8px;display:flex}.drawing-titlebar>div:last-child{border-right:0}.drawing-titlebar span{color:#526072;text-transform:uppercase;font-size:9px}.drawing-titlebar strong{font-size:12px}.drawing-body{flex:1;grid-template-columns:37% 1fr;gap:10px;min-height:0;display:grid}.drawing-specs{flex-direction:column;gap:4px;display:flex}.drawing-group{border:1px solid #17212b}.drawing-group h4{color:#fff;background:#1c3552;margin:0;padding:2px 8px;font-size:10px}.drawing-group dl{margin:0}.drawing-group dl>div{border-top:1px solid #d8e0e6;justify-content:space-between;gap:8px;padding:1px 8px;display:flex}.drawing-group dt{color:#35485b}.drawing-group dd{text-align:right;font-variant-numeric:tabular-nums;margin:0;font-weight:700}.drawing-views{grid-template-rows:1fr 1fr;grid-template-columns:1fr 1fr;gap:8px;min-height:0;display:grid}.drawing-view{border:1px solid #d8e0e6;flex-direction:column;justify-content:center;align-items:center;min-height:0;margin:0;padding:6px;display:flex}.drawing-view svg{color:#17212b;flex:1;width:100%;min-height:0;overflow:visible}.drawing-render-view img{object-fit:contain;flex:1;width:100%;height:0;min-height:0;display:block}.drawing-render-view p{text-align:center;color:#8a3d1d;margin:auto;padding:12px}.drawing-orthographic-body{background:#e8f0f7;flex:1;width:100%;min-height:0;position:relative}.drawing-orthographic-body img,.drawing-orthographic-body svg{width:100%;height:100%;position:absolute;inset:0}.drawing-orthographic-body img{object-fit:contain;display:block}.drawing-orthographic-body svg{pointer-events:none}.drawing-orthographic-body p{text-align:center;color:#8a3d1d;place-items:center;margin:0;padding:12px;display:grid;position:absolute;inset:0}.drawing-toolbar .drawing-save:disabled{opacity:.55;cursor:wait}.drawing-view-side{grid-column:1/-1}.drawing-view figcaption{color:#526072;font-size:10px}.drawing-wire{stroke:#6b7480;stroke-linecap:round;stroke-linejoin:round}.drawing-wire.is-back{stroke:#b9c0c8}.drawing-wire.is-assumed{stroke:#7cc6e0}.drawing-dim{stroke:currentColor;fill:none}.drawing-dim text{stroke:none;fill:currentColor;font-family:inherit}.drawing-footer{border:1px solid #17212b;grid-template-columns:1.6fr 1fr;display:grid}.drawing-notes{border-right:1px solid #17212b;padding:6px 8px}.drawing-notes p{margin:2px 0}.drawing-signoff{grid-template-rows:repeat(3,1fr);display:grid}.drawing-signoff>div{border-bottom:1px solid #d8e0e6;align-items:flex-end;gap:8px;padding:4px 8px;display:flex}.drawing-signoff>div:last-child{border-bottom:0}.drawing-signoff i{border-bottom:1px dotted #526072;flex:1;height:1em}@media print{@page{size:A4 landscape;margin:6mm}html,body{background:#fff!important}body>:not(.drawing-overlay){display:none!important}.drawing-overlay{background:#fff;padding:0;position:static;overflow:visible}.drawing-toolbar{display:none}.drawing-sheet{zoom:.93;break-inside:avoid;break-after:avoid;-webkit-print-color-adjust:exact;print-color-adjust:exact;border-width:1.5px;width:1123px;height:794px}}.special-curve{margin:12px 0 4px}.special-curve svg{width:100%;max-width:420px;height:auto;display:block}.special-curve .curve-axis{stroke:var(--border);stroke-width:1px}.special-curve .curve-line{stroke:var(--accent);stroke-width:2px}.special-curve .curve-tick,.special-curve text{fill:var(--muted)}.special-curve .curve-contact circle{fill:#26728a}.special-curve .curve-operating circle{fill:var(--text)}.special-curve .curve-limit circle{fill:#c0392b}.special-curve figcaption{color:var(--muted);margin-top:2px;font-size:.72rem}.verification-banner.is-approved{background:#2f7d4f29;border-color:#2f7d4f}.verification-banner.is-approved .warning-mark{background:#2f7d4f}.shop-verification{margin-top:12px}.shop-verification h4{margin:0 0 6px;font-size:.85rem}.shop-verification ul{margin:0 0 8px;padding-left:18px;font-size:.8rem}.shop-verification li.is-outside strong{color:#c0392b}.shop-verdict{font-weight:800}.shop-verdict.is-pass{color:#2f7d4f}.shop-verdict.is-fail{color:#c0392b}.shop-record pre{white-space:pre-wrap;word-break:break-all;max-width:100%;font-size:.72rem;overflow-x:auto}.verification-banner.is-catalog{background:#2b6f9a29;border-color:#2b6f9a}.verification-banner.is-catalog .warning-mark{background:#2b6f9a}.drawing-view .drawing-section{fill:#cfd6da;stroke:#1c2226;stroke-width:.35px}.drawing-view .drawing-outline{fill:none;stroke:#1c2226;stroke-width:.35px}.drawing-view .drawing-hidden{fill:none;stroke:#6b7680;stroke-width:.2px;stroke-dasharray:1.2 .8}.drawing-view .drawing-centreline{stroke:#6b7680;stroke-width:.2px;stroke-dasharray:3 1 .6 1}.hero-lead-line{white-space:nowrap;display:block}@media (width<=380px){.hero-lead-line{white-space:normal}}.shop-showcase{gap:18px;margin:40px 0 24px;display:grid}.shop-banner-main{border:1px solid var(--border);border-radius:20px;width:100%;height:auto;display:block}.shop-card{border:1px solid var(--border);color:#f4f6f8;background:linear-gradient(135deg,#15181d 0%,#1d2229 60%,#2a1a10 100%);border-radius:24px;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:24px;padding:28px;display:grid}.shop-card h2{margin:0;font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.1}.shop-name-accent{color:#ff8a35}.shop-company{letter-spacing:.06em;color:#c9d0d8;margin:6px 0 14px;font-weight:700}.shop-pitch{color:#e5e9ee;margin:0 0 18px;font-size:1rem;line-height:1.6}.shop-features{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:0;padding:0;list-style:none;display:grid}.shop-features li{text-align:center;border:1px solid #ff8a3559;border-radius:14px;justify-items:center;gap:4px;padding:12px 8px;display:grid}.shop-features strong{font-size:.9rem}.shop-features span{color:#c9d0d8;font-size:.78rem}.shop-feature-icon{fill:none;stroke:#ff8a35;stroke-width:1.6px;stroke-linecap:round;stroke-linejoin:round;width:34px;height:34px}.shop-card-side{align-content:center;justify-items:center;gap:12px;display:grid}.shop-banner-side{border-radius:16px;width:100%;height:auto;display:block}.shop-cta{text-align:center;justify-content:center;justify-self:stretch;min-height:68px;margin-top:0;padding:18px 28px;font-size:clamp(1.15rem,2.2vw,1.4rem);box-shadow:0 10px 28px #ff8a3547}.shop-cta span{font-size:1.3em}.shop-contact-bar{color:#f4f6f8;background:#111418;border-top:3px solid #ff8a35;border-radius:18px;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px 28px;padding:16px 20px;display:flex}.shop-contact-bar a{color:#f4f6f8;font-weight:700;text-decoration:none}.shop-contact-bar a:hover{color:#ff8a35}.shop-contact-bar a>span[aria-hidden],.shop-address>span[aria-hidden]{color:#ff8a35;margin-right:4px;font-weight:800}.shop-address{font-weight:600}@media (width<=760px){.shop-card{grid-template-columns:1fr;padding:20px}.shop-features{grid-template-columns:1fr}.shop-contact-bar{justify-content:flex-start}}.hero-visual{align-self:stretch;margin:0;display:flex;position:relative}.hero-visual img{object-fit:cover;object-position:60% 50%;border-radius:24px;width:100%;height:auto;min-height:100%;display:block;box-shadow:0 24px 60px #00000073;-webkit-mask-image:linear-gradient(90deg,#0000 0%,#000 10% 100%);mask-image:linear-gradient(90deg,#0000 0%,#000 10% 100%)}@media (width>=900px){.hero{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:24px}.hero-copy{max-width:none}.hero h1{white-space:nowrap}}@media (width<=899px){.hero-visual{margin-top:24px}.hero-visual img{-webkit-mask-image:linear-gradient(#000 70%,#0000 100%);mask-image:linear-gradient(#000 70%,#0000 100%)}}