:root{
  --bg:#101418;--surface:#101418;--surface-1:#171c22;--surface-2:#20262e;--surface-3:#28313b;
  --text:#e3e8ef;--muted:#bec7d3;--outline:#88929f;--outline-soft:#3b444f;
  --primary:#a7c8ff;--on-primary:#00315e;--primary-container:#294d78;--on-primary-container:#d6e4ff;
  --secondary-container:#3b4c63;--on-secondary-container:#dbe6f7;--error:#ffb4ab;
  --hero-a:#315884;--hero-b:#3e4d65;--shadow:0 1px 3px rgba(0,0,0,.32),0 4px 14px rgba(0,0,0,.14);
}
:root[data-theme="light"]{
  --bg:#f9f9ff;--surface:#f9f9ff;--surface-1:#f0f3fa;--surface-2:#e7edf7;--surface-3:#dde7f5;
  --text:#191c20;--muted:#43474e;--outline:#73777f;--outline-soft:#c3c7cf;
  --primary:#1266d3;--on-primary:#fff;--primary-container:#d8e2ff;--on-primary-container:#001a41;
  --secondary-container:#dce2f0;--on-secondary-container:#161c26;--error:#ba1a1a;
  --hero-a:#d8e2ff;--hero-b:#dce2f0;--shadow:0 1px 2px rgba(0,0,0,.14),0 3px 9px rgba(0,0,0,.08);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}
body{overflow-x:hidden}
button,input,select{font:inherit}
button{color:inherit}
.app-shell{width:min(920px,100%);min-height:100vh;margin:0 auto;background:var(--surface);position:relative;padding-bottom:82px}
.app-bar,.results-bar{height:64px;display:flex;align-items:center;padding:0 18px;position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(14px)}
.app-bar{justify-content:space-between}.results-bar{gap:10px}.results-bar .app-title{flex:1}.app-title{font-size:20px;font-weight:600;letter-spacing:.1px}.spacer-icon{width:44px}
.icon-btn{width:44px;height:44px;border:0;border-radius:50%;background:transparent;display:grid;place-items:center;cursor:pointer;font-size:23px}.icon-btn:hover{background:var(--surface-2)}.icon-btn svg{width:24px;height:24px;fill:currentColor}
.content{min-height:calc(100vh - 146px)}.screen{display:none}.screen.active{display:block}.page-pad,.home-list{padding:20px 20px 120px}.home-list{padding-top:20px}
.hero-card{padding:24px;border-radius:24px;background:linear-gradient(135deg,var(--hero-a),var(--hero-b));box-shadow:var(--shadow)}.hero-icon{width:48px;height:48px;fill:var(--primary)}.hero-card h1{font-size:40px;line-height:1.1;margin:20px 0 18px;font-weight:800}.hero-card p{font-size:19px;line-height:1.45;margin:0 0 24px;color:var(--text)}
.filled-btn,.outlined-btn{border:0;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 20px;font-weight:650;letter-spacing:.1px}.filled-btn{border-radius:999px;background:var(--primary);color:var(--on-primary)}.filled-btn svg{width:22px;height:22px;fill:currentColor}.outlined-btn{border:1px solid var(--outline);background:transparent;border-radius:999px;color:var(--primary)}.outlined-btn.small{min-height:42px;padding:0 16px;white-space:nowrap}.big-action{width:100%;border-radius:999px;margin-top:8px;min-height:52px}.hero-button{padding:0 25px}
.ad-slot{height:50px;width:100%;background:#fff;border-radius:0;margin:18px 0 24px}.section-heading{font-size:22px;margin:0 0 12px}.tool-card{width:100%;display:grid;grid-template-columns:48px 1fr 24px;align-items:center;gap:12px;text-align:left;border:0;background:var(--surface-1);padding:14px 18px;border-radius:12px;margin-bottom:10px;box-shadow:var(--shadow);cursor:pointer}.tool-icon{width:42px;height:42px;border-radius:12px;background:var(--primary-container);color:var(--on-primary-container);display:grid;place-items:center;font-weight:800;font-size:20px}.tool-copy{display:flex;flex-direction:column;gap:4px}.tool-copy strong{font-size:16px}.tool-copy span{font-size:14px;color:var(--muted)}.chevron{font-size:30px;color:var(--muted)}
.page-heading-row{display:flex;align-items:flex-start;gap:12px;margin-bottom:22px}.page-heading-row>div{flex:1}.page-heading-row h1{font-size:25px;line-height:1.2;margin:0 0 6px}.page-heading-row p{margin:0;color:var(--muted);line-height:1.45}.form-section{font-size:16px;margin:24px 0 12px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}.field{display:block;margin-bottom:14px}.field>span{display:block;font-size:13px;margin:0 0 -1px 14px;background:var(--surface);width:max-content;max-width:calc(100% - 28px);padding:0 4px;position:relative;z-index:2;color:var(--muted)}.field>div,.select-field{height:56px;border:1px solid var(--outline);border-radius:4px;display:flex;align-items:center;padding:0 14px;background:var(--surface-1)}.field input,.field select,.select-field select{flex:1;min-width:0;border:0;outline:0;background:transparent;color:var(--text);font-size:16px}.field>div>span{color:var(--muted);font-size:14px;margin-left:8px}.select-field{padding:0}.select-field select{width:100%;height:100%;padding:0 14px}.helper{font-size:13px;color:var(--muted);line-height:1.45;margin:12px 0 0}.hidden{display:none!important}
.chip{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--outline);border-radius:9px;padding:6px 10px;font-size:13px;margin:0 0 8px}.metric-card{display:flex;gap:14px;background:var(--surface-1);box-shadow:var(--shadow);border-radius:12px;padding:18px;margin:0 0 10px}.metric-icon{flex:0 0 42px;width:42px;height:42px;border-radius:12px;background:var(--primary-container);color:var(--on-primary-container);display:grid;place-items:center;font-size:18px}.metric-copy{min-width:0}.metric-label{font-size:14px;font-weight:650;margin-bottom:4px}.metric-value{font-size:23px;font-weight:750;line-height:1.2;overflow-wrap:anywhere}.metric-sub{font-size:13px;color:var(--muted);margin-top:5px}.results-list .ad-slot,.inline-results .ad-slot{margin:8px 0 12px}.result-actions{display:flex;gap:10px;margin-top:16px}.result-actions .filled-btn,.result-actions .outlined-btn{flex:1}
.segmented{display:flex;border:1px solid var(--outline);border-radius:999px;overflow:hidden;margin-bottom:22px}.segmented button{flex:1;min-height:44px;border:0;border-right:1px solid var(--outline);background:transparent;color:var(--text);cursor:pointer}.segmented button:last-child{border-right:0}.segmented button.active{background:var(--secondary-container);color:var(--on-secondary-container);font-weight:700}.segmented.three button{font-size:13px;display:flex;align-items:center;justify-content:center;gap:6px}.inline-results{margin-top:22px}.save-row{display:flex;justify-content:flex-end;margin-top:12px}.tonal-btn{border:0;border-radius:999px;min-height:44px;padding:0 18px;background:var(--secondary-container);color:var(--on-secondary-container);font-weight:650;cursor:pointer}
.catalog-pad{padding-top:14px}.catalog-segment{margin-bottom:14px}.catalog-status-card{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 16px;border-radius:12px;background:var(--surface-1);box-shadow:var(--shadow);margin-bottom:14px}.catalog-status-card strong{display:block;font-size:14px}.catalog-status-card small{display:block;color:var(--muted);margin-top:3px}.search-field{height:56px;border:1px solid var(--outline);border-radius:4px;display:flex;align-items:center;gap:10px;padding:0 14px;margin-bottom:14px;background:var(--surface-1)}.search-field input{flex:1;border:0;outline:0;background:transparent;color:var(--text);font-size:16px}.catalog-card{background:var(--surface-1);box-shadow:var(--shadow);border-radius:12px;padding:16px 18px;margin-bottom:10px}.catalog-card h3{margin:0 0 7px;font-size:17px}.catalog-card p{margin:4px 0;color:var(--muted);font-size:14px}.catalog-card details{margin-top:10px}.catalog-card summary{cursor:pointer;color:var(--primary);font-weight:650}.details-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px 14px;margin-top:12px;font-size:13px}.details-grid div{display:flex;justify-content:space-between;gap:10px;border-bottom:1px solid var(--outline-soft);padding-bottom:6px}.empty{padding:70px 10px;text-align:center;color:var(--muted)}
.settings-pad h3{font-size:16px;margin:4px 0 10px}.settings-pad h3:not(:first-child){margin-top:28px}.settings-card{border-radius:12px;overflow:hidden;background:var(--surface-1);box-shadow:var(--shadow)}.settings-card button{width:100%;height:58px;display:grid;grid-template-columns:28px 1fr 28px;align-items:center;text-align:left;border:0;border-bottom:1px solid var(--outline-soft);background:transparent;color:var(--text);padding:0 16px;cursor:pointer}.settings-card button:last-child{border-bottom:0}.settings-card button strong{font-size:15px}.settings-card .check{text-align:center}.settings-card button.selected .check::after{content:"✓";color:var(--primary);font-weight:800}.about-card{display:flex;gap:14px;align-items:center;padding:15px 16px;background:var(--surface-1);border-radius:12px;box-shadow:var(--shadow)}.about-card>div:last-child{display:flex;flex-direction:column;gap:4px}.about-card span{color:var(--muted);font-size:13px}
.bottom-nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:min(920px,100%);height:80px;padding:8px 10px calc(8px + env(safe-area-inset-bottom));display:grid;grid-template-columns:repeat(5,1fr);background:color-mix(in srgb,var(--surface-2) 96%,transparent);z-index:30;border-top:1px solid var(--outline-soft)}.bottom-nav button{border:0;background:transparent;color:var(--muted);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;cursor:pointer;border-radius:18px}.bottom-nav button span{font-size:22px;min-width:54px;height:30px;border-radius:999px;display:grid;place-items:center}.bottom-nav button small{font-size:12px}.bottom-nav button.active{color:var(--primary);font-weight:700}.bottom-nav button.active span{background:var(--secondary-container);color:var(--on-secondary-container)}
.toast{position:fixed;left:50%;bottom:100px;transform:translate(-50%,20px);opacity:0;pointer-events:none;z-index:100;background:#2d3138;color:#fff;padding:12px 18px;border-radius:6px;transition:.2s;max-width:min(88vw,520px);box-shadow:var(--shadow)}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:620px){.page-pad,.home-list{padding-left:16px;padding-right:16px}.hero-card{padding:22px}.hero-card h1{font-size:34px}.page-heading-row{flex-direction:column}.page-heading-row .outlined-btn{align-self:flex-end}.two-col{grid-template-columns:1fr}.details-grid{grid-template-columns:1fr}.metric-value{font-size:21px}}

.selected-components{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px}.component-chip{display:inline-flex;align-items:center;border:1px solid var(--outline);border-radius:999px;padding:7px 11px;background:var(--surface-1);font-size:13px;font-weight:650}.catalog-actions{display:flex;justify-content:flex-end;margin-top:14px}.catalog-use-btn{min-height:42px;padding:0 16px;font-size:14px}

/* v0.7 engineering workflow */
.locked-summary{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 16px;margin-bottom:14px;border:1px solid var(--outline-soft);background:var(--surface-1);border-radius:10px}.locked-summary strong{display:block;font-size:15px}.locked-summary span{display:block;color:var(--muted);font-size:13px;margin-top:3px}.status-card{padding:15px 16px;margin:12px 0;border-left:5px solid var(--outline);background:var(--surface-1);box-shadow:var(--shadow);border-radius:6px}.status-card.pass{border-left-color:#2e7d32}.status-card.warning{border-left-color:#ed8b00}.status-card.fail{border-left-color:#c62828}.status-card.info{border-left-color:var(--primary)}.status-title{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;margin-bottom:8px}.status-check{display:flex;gap:10px;padding:7px 0;border-top:1px solid var(--outline-soft);font-size:13px;line-height:1.35}.status-check:first-of-type{border-top:0}.status-check b{min-width:68px}.status-check.pass b{color:#55c75a}.status-check.warning b{color:#ffb84d}.status-check.fail b{color:#ff7b72}.diagram-card,.trace-card,.info-block{background:var(--surface-1);box-shadow:var(--shadow);border-radius:12px;padding:16px;margin:12px 0}.diagram-card h3,.trace-card h3{margin:0 0 12px;font-size:16px}.optical-diagram{height:150px;position:relative;overflow:hidden;background:linear-gradient(180deg,var(--surface-2),var(--surface-1));border-radius:8px}.optical-diagram .obj-line,.optical-diagram .lens-line,.optical-diagram .sensor-line{position:absolute;bottom:28px;width:3px;background:var(--text)}.optical-diagram .obj-line{left:11%;height:72px}.optical-diagram .lens-line{left:50%;height:100px;background:var(--primary)}.optical-diagram .sensor-line{right:11%;height:64px}.optical-diagram .ray{position:absolute;left:11%;top:43px;width:78%;height:2px;background:var(--primary);transform-origin:left center}.optical-diagram .ray-a{transform:rotate(8deg)}.optical-diagram .ray-b{transform:rotate(-8deg)}.optical-diagram .diagram-label{position:absolute;bottom:7px;font-size:11px;color:var(--muted);transform:translateX(-50%)}.optical-diagram .label-object{left:11%}.optical-diagram .label-lens{left:50%}.optical-diagram .label-sensor{left:89%}.trace-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px 16px;font-size:13px}.trace-grid div{display:flex;justify-content:space-between;gap:10px;border-bottom:1px solid var(--outline-soft);padding:7px 0}.trace-grid span:first-child{color:var(--muted)}.camera-layout{position:relative;height:94px;margin:12px 0;background:var(--surface-2);border-radius:8px;overflow:hidden;padding:13px}.camera-track{display:flex;height:68px;align-items:stretch}.camera-block{min-width:80px;flex:1;border:2px solid var(--primary);background:color-mix(in srgb,var(--primary-container) 72%,transparent);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;margin-left:-10px}.camera-block:first-child{margin-left:0}.recent-projects{display:grid;gap:9px}.recent-project{width:100%;text-align:left;border:0;border-radius:12px;padding:13px 15px;background:var(--surface-1);box-shadow:var(--shadow);color:var(--text);cursor:pointer}.recent-project strong{display:block;font-size:14px}.recent-project span{display:block;color:var(--muted);font-size:12px;margin-top:4px}.info-block{line-height:1.5}.info-block h4{margin:0 0 8px;font-size:15px}.info-block p{margin:5px 0;color:var(--muted);font-size:13px}.info-block code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--text)}
@media(max-width:620px){.trace-grid{grid-template-columns:1fr}.locked-summary{align-items:flex-start;flex-direction:column}.camera-block{font-size:10px;min-width:58px}}