:root{
  --bg:#eef7f5;--surface:#ffffff;--surface2:#e4f2ef;--text:#102826;--muted:#526b68;
  --border:#bed9d3;--brand:#087f73;--brand2:#04665e;--accent:#d5fff7;--danger:#a42b35;
  --shadow:0 12px 32px rgba(6,52,48,.10);--focus:#f3a712;--on-brand:#ffffff;--code:#e8f2f0;
}
:root[data-theme="dark"]{
  --bg:#071d1c;--surface:#0d2a28;--surface2:#123b37;--text:#f1fffc;--muted:#b8d7d2;
  --border:#2b5a54;--brand:#2dd4bf;--brand2:#5eead4;--accent:#103f3a;--danger:#ff8d98;
  --shadow:0 16px 34px rgba(0,0,0,.28);--focus:#ffd166;--on-brand:#031a17;--code:#123b37;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.55}a{color:var(--brand2);text-decoration:none}button,input,select,textarea{font:inherit}.muted{color:var(--muted)}
.topbar{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:9px 24px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-size:18px;white-space:nowrap}.brandmark{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:var(--accent)}.navlinks{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.navlinks a,.linklike,.theme-btn{color:var(--text);background:transparent;border:0;padding:8px 10px;border-radius:8px;cursor:pointer}.navlinks a:hover,.linklike:hover,.theme-btn:hover{background:var(--surface2)}.navlinks form{margin:0}
.app-shell{display:grid;grid-template-columns:286px minmax(0,1fr);min-height:calc(100vh - 106px)}.sidebar{padding:18px 12px;border-right:1px solid var(--border);background:var(--surface);display:flex;flex-direction:column;gap:4px;overflow:auto;position:sticky;top:64px;height:calc(100vh - 64px);align-self:start}.sidebar a{color:var(--text);padding:9px 10px;border-radius:8px;font-size:13px;border:1px solid transparent;transition:background .15s ease,color .15s ease,border-color .15s ease,box-shadow .15s ease}.sidebar a:hover{background:var(--surface2)}.sidebar a.active,.sidebar a.active:hover{background:var(--brand);color:var(--on-brand);border-color:var(--brand2);font-weight:800;box-shadow:0 0 0 1px var(--brand2),var(--shadow)}.side-user{padding:10px;margin-bottom:6px;background:var(--surface2);border-radius:10px}.side-user span{display:block;color:var(--muted);font-size:12px;margin-top:3px;overflow:hidden;text-overflow:ellipsis}.side-title{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.12em;margin:12px 10px 3px}.side-group{color:var(--brand2);font-size:10px;text-transform:uppercase;letter-spacing:.1em;margin:7px 10px 0;font-weight:800}.content{padding:28px;max-width:1540px;width:100%}.public-content{max-width:1220px;margin:auto;padding:42px 28px}
.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:28px;align-items:center;padding:50px 0}.hero h1,.doc-page h1{font-size:clamp(34px,5vw,62px);line-height:1.04;margin:10px 0 18px;letter-spacing:-.035em}.hero p,.lead{font-size:19px;color:var(--muted);max-width:800px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.13em;color:var(--brand2)}.hero-actions,.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.hero-panel{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.metric,.kpi,.panel,.feature-grid article,.tool-card,.case-card,.project-list article,.auth-card,.note-box,.quick-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}.metric{padding:22px}.metric b{font-size:30px;display:block}.metric span{color:var(--muted)}.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.feature-grid article{padding:22px}.feature-grid h3{margin-top:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:10px;border:1px solid var(--border);padding:10px 15px;font-weight:750;cursor:pointer;transition:.15s ease;min-height:42px}.btn:hover{transform:translateY(-1px)}.btn.primary{background:var(--brand);color:var(--on-brand);border-color:transparent}.btn.primary:hover{background:var(--brand2);color:var(--on-brand)}.btn.secondary{background:var(--surface);color:var(--text)}.btn.secondary:hover{background:var(--surface2)}.btn.danger{background:transparent;color:var(--danger);border-color:var(--danger)}.full{width:100%}.narrow{max-width:720px}
.pagehead{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:20px}.pagehead h1{font-size:34px;line-height:1.12;margin:5px 0 7px}.pagehead p{color:var(--muted);margin:0}.pagehead .actions{margin-top:0}.kpi-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:18px 0 22px}.kpi-grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.kpi{padding:18px}.kpi span,.kpi small{display:block;color:var(--muted)}.kpi b{display:block;font-size:25px;margin:5px 0}.quick-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:28px}.quick-card{padding:16px;color:var(--text);display:grid;gap:5px}.quick-card span{font-size:12px;color:var(--muted)}.quick-card:hover{border-color:var(--brand);transform:translateY(-1px)}
.section-title{display:flex;align-items:center;justify-content:space-between;margin:18px 0 12px}.module-group{margin:0 0 24px}.module-group>h3{margin:0 0 10px;color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.08em}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.tool-card{padding:18px;display:flex;gap:13px;color:var(--text)}.tool-card:hover{border-color:var(--brand);transform:translateY(-2px)}.tool-card h3{font-size:16px;margin:0 0 5px}.tool-card p{font-size:13px;color:var(--muted);margin:0 0 10px}.tool-icon{font-size:27px}.card-link{font-size:13px;font-weight:800;color:var(--brand2)}
.two-col{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px}.panel{padding:22px}.panel h2{margin-top:0}.form-grid{display:grid;gap:14px}.form-grid label{display:grid;gap:6px;font-size:13px;font-weight:700;color:var(--muted)}input,select,textarea{width:100%;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:9px;padding:10px 11px;outline:none}textarea{resize:vertical}input:focus,select:focus,textarea:focus,button:focus-visible,a:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-color:transparent}.checkrow{grid-template-columns:auto 1fr!important;align-items:center;background:var(--surface2);padding:10px;border-radius:9px}.checkrow input{width:auto}.results{display:grid;gap:8px}.results>div{display:flex;justify-content:space-between;gap:18px;padding:10px 0;border-bottom:1px solid var(--border)}.results span{color:var(--muted)}.results strong{text-align:right}.empty-state{text-align:center;padding:32px;color:var(--muted)}.empty-state:first-letter{font-size:28px}.note-box{padding:14px 16px;margin-top:16px}.result-box{margin-top:16px;padding:14px;background:var(--surface2);border-radius:10px}.result-box a{display:block;margin-top:5px}
.filterbar{display:grid;grid-template-columns:1.5fr repeat(3,1fr) auto auto;gap:8px;margin-bottom:16px}.compare-filter{grid-template-columns:1fr 1fr auto;max-width:900px}.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.case-card{padding:16px}.case-card h3{font-size:16px;margin:10px 0}.case-card p{font-size:13px;color:var(--muted);margin:5px 0}.chips{display:flex;gap:6px;flex-wrap:wrap}.chips span{font-size:11px;padding:4px 7px;border-radius:999px;background:var(--surface2);color:var(--text);border:1px solid var(--border)}.pager{display:flex;justify-content:center;align-items:center;gap:14px;margin:22px;flex-wrap:wrap}
.project-list{display:grid;gap:10px}.project-list article{padding:16px;display:flex;justify-content:space-between;gap:20px;align-items:center}.project-list h3{margin:8px 0 4px}.project-list p{margin:0;color:var(--muted);font-size:13px}.project-list .actions{margin:0;flex-wrap:wrap;justify-content:flex-end}.project-list form{margin:0}.split{display:grid;grid-template-columns:1fr 1fr;gap:14px}.auth-card{max-width:500px;margin:56px auto;padding:28px}.auth-card h1{text-align:center}.auth-card>p{text-align:center;color:var(--muted)}.auth-icon{text-align:center;font-size:42px}.auth-links{text-align:center;margin-top:16px}
.doc-page{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:clamp(24px,5vw,54px);box-shadow:var(--shadow)}.doc-page h1{font-size:clamp(32px,4vw,52px)}.doc-page h2{margin-top:34px}.equation{font-family:Cambria,Georgia,serif;font-size:clamp(20px,2.5vw,32px);text-align:center;padding:20px;margin:22px 0;background:var(--surface2);border:1px solid var(--border);border-radius:12px;overflow:auto}.physics-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.physics-grid article{background:var(--surface2);border:1px solid var(--border);border-radius:10px;padding:14px;text-align:center}.physics-grid b,.physics-grid span{display:block}.physics-grid span{font-size:12px;color:var(--muted);margin-top:4px}.flowline{display:flex;align-items:center;justify-content:center;gap:9px;flex-wrap:wrap;margin:24px 0}.flowline span{background:var(--surface2);padding:8px 12px;border-radius:999px;border:1px solid var(--border)}.guide-steps{display:grid;gap:10px;padding-left:24px}.guide-steps li{padding:12px;background:var(--surface2);border-radius:10px}.guide-steps p{margin:4px 0 0;color:var(--muted)}.legal p{margin:16px 0}.prewrap{white-space:pre-wrap}.report pre,pre{white-space:pre-wrap;word-break:break-word;background:var(--code);border:1px solid var(--border);border-radius:10px;padding:14px;max-width:100%;overflow:auto}.profile-bars{display:grid;gap:5px;max-height:620px;overflow:auto}.profile-row{display:grid;grid-template-columns:42px 1fr 58px;gap:8px;align-items:center;font-size:12px}.profile-row progress{width:100%;height:14px;accent-color:var(--brand)}
.flash{padding:11px 14px;border-radius:10px;margin-bottom:12px;border:1px solid var(--border);background:var(--surface2)}.flash.error{border-color:var(--danger)}.flash.success{border-color:var(--brand)}.text-link{display:inline-block;margin-top:13px}code{background:var(--code);padding:2px 5px;border-radius:5px}.save-analysis{margin-top:16px}.wide-panel{margin-top:18px}.table-wrap{overflow:auto;max-width:100%}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--border);vertical-align:top}th{color:var(--muted)}hr{border:0;border-top:1px solid var(--border);margin:22px 0}footer{min-height:42px;padding:12px 24px;text-align:center;color:var(--muted);border-top:1px solid var(--border);background:var(--surface);font-size:12px}
@media print{.topbar,.sidebar,footer,.no-print{display:none!important}.app-shell{display:block}.content{padding:0;max-width:none}.doc-page{box-shadow:none;border:0;padding:0;color:#000;background:#fff}body{background:#fff;color:#000}pre{border:1px solid #bbb;background:#fff}}
@media(max-width:1200px){.tool-grid,.case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.quick-grid,.kpi-grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}.physics-grid{grid-template-columns:repeat(3,1fr)}.filterbar{grid-template-columns:1fr 1fr 1fr}.app-shell{grid-template-columns:240px minmax(0,1fr)}}
@media(max-width:800px){.topbar{height:auto;min-height:64px;align-items:flex-start;gap:10px;padding:12px}.brand{white-space:normal}.navlinks{justify-content:flex-end}.app-shell{display:block}.sidebar{position:static;top:auto;height:auto;align-self:auto;border-right:0;border-bottom:1px solid var(--border);max-height:260px}.content,.public-content{padding:20px}.hero,.two-col{grid-template-columns:1fr}.hero{padding:22px 0}.feature-grid,.kpi-grid,.kpi-grid.four,.quick-grid,.tool-grid,.case-grid,.split,.physics-grid{grid-template-columns:1fr}.filterbar,.compare-filter{grid-template-columns:1fr}.pagehead,.project-list article{display:block}.pagehead .actions,.pagehead>.btn,.project-list .actions{margin-top:12px}.project-list .actions{justify-content:flex-start}.results>div{display:grid;gap:3px}.results strong{text-align:left}}

/* Destructive actions are visually distinct without relying on color alone. */
.btn.danger{background:#8f1d2c;color:#fff;border:1px solid #8f1d2c;font-weight:800}
.btn.danger:hover,.btn.danger:focus-visible{background:#711522;border-color:#711522;color:#fff}
html[data-theme="dark"] .btn.danger{background:#ffb4bd;color:#3a0710;border-color:#ffb4bd}
html[data-theme="dark"] .btn.danger:hover,html[data-theme="dark"] .btn.danger:focus-visible{background:#ffd9de;border-color:#ffd9de;color:#26040a}