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.design-brief dd{color:#4c626c}
.stage-panel{height:auto;max-height:none}
.stage-panel #viewport{height:380px;min-height:300px;flex:none}
.stage-head{padding:18px 22px 12px}
.stage-panel .result{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:5px 12px;margin:0;padding:14px 20px;border-top:1px solid var(--line);border-radius:0;background:#f5faf9}
.result-copy{min-width:0}
.result #result-label{font-size:.875rem;font-weight:600;color:var(--ink)}
.result #result-detail{font-size:.8125rem;margin-top:3px}
.result strong{font-size:1.9rem;line-height:1.25;letter-spacing:-.02em;text-align:right;max-width:180px}
.result strong small{font-size:.875rem}
.result .finish-note{border:0;margin:0;padding:0;font-size:.75rem!important;color:var(--muted)!important}
.result .result-model-note{margin:0;font-size:.75rem;line-height:1.4;text-align:right;color:var(--muted)}
.stage-panel .numeric-warning{margin:0;border-radius:0;border-left:0;border-top:1px solid #eedab8;padding:9px 20px;font-size:.8125rem}
.transport{padding-top:13px;padding-bottom:7px}
.scene-options{padding-top:3px;padding-bottom:12px}
.experiment-actions{display:block;border-bottom:1px solid var(--line);padding:15px 0}
.experiment-action-buttons{display:flex;gap:8px 24px;align-items:center;flex-wrap:wrap;padding:12px 0 0}
.experiment-actions summary,.structure-notes summary,.supporting-section>summary{font-size:.875rem}
.supporting-section{padding:16px 0}
.controls-panel #calculation-settings{order:0}
#viewport,.stage-panel,#settings-panel{scroll-margin-top:14px}
.mobile-actions{display:none}
.structure-picker{border:0;border-radius:18px;padding:0;width:min(560px,calc(100% - 32px));max-height:calc(100dvh - 48px);color:var(--ink);background:white;box-shadow:0 16px 80px #082c3e40;overflow:auto;overscroll-behavior:contain}
.structure-picker::backdrop{background:#102e3f70;backdrop-filter:blur(3px)}
.picker-header{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;background:white;padding:16px 20px;border-bottom:1px solid var(--line)}
.picker-header h2{font-size:1.125rem}
.picker-header button{width:44px;height:44px;font-size:1.6rem;background:#edf3f4;border-radius:50%;padding:0;line-height:1}
.structure-options{padding:0 20px 22px}
.picker-group{margin-top:20px}
.picker-group h3{display:flex;align-items:center;gap:8px;font-size:.875rem;font-weight:600;color:var(--muted);margin:0 0 9px}
.picker-group h3 span{font-size:.75rem;font-weight:400}
.picker-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.picker-option{display:flex;align-items:center;gap:8px;padding:13px 10px;min-height:50px;text-align:left;border:1px solid var(--line);border-radius:9px;font-size:.875rem;line-height:1.35;background:white}
.picker-glyph{font-family:Georgia,serif;font-size:1.35rem;color:var(--teal);width:24px;flex-shrink:0;text-align:center}
.picker-check{margin-left:auto;visibility:hidden;color:var(--teal)}
.picker-option.selected{background:#e4f3ee;border-color:#79b4a6;font-weight:600}
.picker-option.selected .picker-check{visibility:visible}
.picker-option:hover{border-color:var(--teal)}
.picker-open{overflow:hidden}
button:focus-visible,summary:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #4aa694;outline-offset:3px}
@media(min-width:981px){.stage-panel{height:auto;max-height:none}.controls-panel{height:auto;max-height:calc(100vh - 110px);min-height:400px}.stage-heading-actions{display:none}.catalog{height:auto;max-height:calc(100vh - 110px)}}
@media(max-width:980px){
 .design-path,.catalog{display:none}
 .workspace{grid-template-columns:minmax(0,1fr) 265px}
 .choose-structure{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:9px 12px;min-height:44px;background:#edf4f3;color:var(--teal);font-size:.875rem;font-weight:600;white-space:nowrap}
 .choose-structure span{font-size:1.1rem}
 .stage-head h2{font-size:1.2rem}
 .stage-head{padding:14px 16px 11px}
 .design-brief{padding:0 16px 13px}
}
@media(max-width:720px){
 body{padding-bottom:calc(84px + env(safe-area-inset-bottom))}
 main{padding:10px 10px 14px}
 .topbar{min-height:56px;padding:9px 13px}
 .brand-mark{width:32px;height:32px;line-height:32px;font-size:1.8rem;border-radius:9px}
 .topbar nav a[href="#lab"]{display:none}
 .topbar nav a[href="#method"]{display:none}
 .topbar nav a[href="#comparison"]{font-size:.875rem}
 .workspace{display:flex;gap:14px}
 .stage-panel{border-radius:12px}
 .stage-panel #viewport{height:clamp(230px,34svh,330px);min-height:230px}
 .stage-head .kicker{display:none}
 .stage-head h2{font-size:1.125rem;line-height:1.45}
 .design-brief{font-size:.875rem;grid-template-columns:32px minmax(0,1fr);gap:4px 8px;line-height:1.45}
 .viewtools{top:12px;right:10px;gap:0;padding:2px}
 .viewtools button{padding:5px 7px;font-size:.8125rem;min-height:34px}
 .exit-legend{top:57px;left:12px;font-size:.75rem;padding:3px 6px}
 .scene-label{display:none}
 .scale-note{bottom:10px;right:12px;font-size:.75rem}
 .transport{flex-wrap:wrap;gap:6px;padding:10px 12px 6px}
 .transport .play{min-width:73px;min-height:40px;padding:8px}
 .transport .clock{min-width:66px;font-size:.875rem}
 .transport input{flex:1;min-width:54px}
 .transport select{max-width:54px;min-height:40px}
 .transport .icon-btn{min-width:32px;min-height:40px}
 .scene-options{padding:0 14px 9px;gap:16px;font-size:.8125rem}
 .scene-options label{min-height:32px;display:flex;align-items:center;gap:3px}
 .stage-panel .result{padding:11px 14px;gap:5px 9px}
 .result #result-label{font-size:.8125rem}
 .result #result-detail{font-size:.75rem}
 .result strong{font-size:1.65rem;max-width:135px}
 .result .finish-note{grid-column:1/-1}
 .result .result-model-note{text-align:left;grid-column:1/-1}
 .stage-panel .numeric-warning{padding:8px 14px}
 .controls-panel{padding:16px;overflow:visible}
 .controls-panel .section-label{font-size:.875rem;padding-bottom:10px}
 .segmented{margin-bottom:16px}
 .segmented button{min-height:42px;font-size:.875rem}
 .param{margin-bottom:19px}
 .param-name label{font-size:.9375rem}
 .precise-param input{font-size:1rem;min-height:36px;width:100px;padding:5px 8px}
 .param select,#case-select,#calculation-method{font-size:1rem;min-height:44px}
 .param input[type=range]{height:28px}
 .param-help{width:30px;height:30px;flex-basis:30px}
 #run,#cancel{display:none!important}
 .mobile-actions:not([hidden]){display:flex;align-items:center;gap:10px}
 .mobile-actions{position:fixed;z-index:30;bottom:var(--keyboard-inset,0px);left:0;right:0;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:#fffffff5;border-top:1px solid #d4e2e5;box-shadow:0 -4px 22px #123c4510;backdrop-filter:blur(10px)}
 .mobile-actions button{min-height:48px;font-size:.9375rem;font-weight:600;border-radius:9px}
 .mobile-navigate{flex:0 1 120px;border:1px solid var(--line);background:white;color:var(--ink);padding:10px 14px}
 .mobile-primary{flex:1;background:var(--teal);color:white;padding:10px 16px}
 .mobile-primary.is-busy{background:var(--ink)}
 .mobile-primary:disabled{opacity:.55;cursor:wait}
 .picker-open .mobile-actions{visibility:hidden}
 #toast{bottom:calc(88px + env(safe-area-inset-bottom));padding:10px 14px;font-size:.875rem;max-width:calc(100vw - 28px);width:max-content}
 .structure-picker{width:100%;max-width:none;margin:auto 0 0;border-radius:18px 18px 0 0;max-height:88dvh;padding-bottom:env(safe-area-inset-bottom)}
 .picker-header{padding:12px 16px}
 .structure-options{padding:0 16px 20px}
 .picker-group{margin-top:17px}
 .picker-option{padding:11px 8px;gap:5px;min-height:49px}
 .picker-grid{gap:7px}
 .experiment-action-buttons{display:grid;grid-template-columns:1fr;gap:5px}
 .experiment-action-buttons .text-btn{text-align:left;min-height:40px}
 #settings-panel,.stage-panel{scroll-margin-top:10px}
 footer{padding-bottom:22px}
}
@media(max-width:360px){.picker-grid{grid-template-columns:1fr}.transport .clock{min-width:62px}.transport .play{min-width:68px}.transport{gap:3px}.mobile-navigate{flex-basis:108px}.result{column-gap:6px}}

@media(min-width:721px) and (max-width:980px){.controls-panel{max-height:calc(100dvh - 110px);position:sticky;top:14px}.stage-panel #viewport{height:330px}}
@media(min-width:721px){.calculation-actions{position:sticky;bottom:-1px;z-index:3;background:white;padding:10px 0;box-shadow:0 5px 0 8px white;flex-shrink:0}.calculation-actions #run{margin:0}.calculation-actions #cancel{margin:7px 0 0}}
@media(max-width:720px){.calculation-actions{display:none}}
@media(min-width:981px){.controls-panel{max-height:min(780px,calc(100dvh - 160px))}}