/* Shared tactile surfaces. Layout overrides keep the original calculation engines intact. */
:root{--bg:#e8edeb;--ink:#283d36;--muted:#5b6e66;--accent:#326f59;--raised:8px 8px 20px #c8d0cc,-8px -8px 20px #fff;--small:4px 4px 9px #c8d0cc,-4px -4px 9px #fff;--inset:inset 4px 4px 9px #cbd3cf,inset -4px -4px 9px #fff;--md-sys-color-primary:var(--accent);--md-sys-color-on-surface:var(--ink);--md-sys-color-on-surface-variant:var(--muted);--md-sys-color-on-primary-container:var(--ink);--md-sys-color-background:var(--bg);--md-sys-color-surface:var(--bg);--md-sys-color-outline:#61756b;--md-sys-color-primary-container:#d6e5dd;--md-sys-color-surface-variant:#d6dfda;--md-sys-color-on-tertiary-container:var(--ink)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg)!important;color:var(--ink);font-family:'Plus Jakarta Sans',system-ui,sans-serif;line-height:1.55}button,input,select,textarea{font:inherit}a{color:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent)!important;outline-offset:5px}button,.button{border:0;border-radius:14px;padding:12px 19px;min-height:44px;background:var(--bg)!important;color:var(--ink);box-shadow:var(--small);transition:transform .18s ease,box-shadow .18s ease,color .18s ease;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:9px}button:hover,.button:hover{transform:translateY(-2px)}button:active,.button:active{transform:translateY(1px) scale(.98);box-shadow:var(--inset)!important}.primary{background:var(--accent)!important;color:#fff!important}.surface,.card,.feedback-card,.chart-pane,.modal-card{background:var(--bg)!important;border:1px solid #f5f8f6!important;border-radius:24px!important;box-shadow:var(--raised)!important;backdrop-filter:none!important;-webkit-backdrop-filter:none!important}.card,.tilt-block{transform:none!important;will-change:auto!important}.card::before,.sidebar::before{display:none!important}.sidebar{background:var(--bg)!important;backdrop-filter:none!important;border:0!important;box-shadow:6px 0 18px #ced6d1!important;width:262px;flex-shrink:0;padding:24px 16px}.sidebar-header{padding:12px 10px;margin-bottom:14px}.sidebar-header h1{font-size:21px;color:var(--ink)}.brand-link{font-size:14px;font-weight:750;color:var(--accent);display:block;margin-bottom:20px;text-decoration:none;letter-spacing:-.4px}.nav-scroll{gap:10px;padding:8px}.nav-button{border-radius:14px;padding:12px 14px;flex-shrink:0;background:var(--bg)!important;backdrop-filter:none!important}.nav-button.active,.nav-button:hover{background:var(--bg)!important;color:var(--accent);box-shadow:var(--inset)!important;transform:none}.nav-section-title{padding:16px 8px 4px}.main-content{min-width:0;padding:34px;overflow-y:auto}.card{padding:28px}.card h2{font-size:25px;letter-spacing:-.8px}.description{color:var(--muted)!important;line-height:1.7}.text-input,input:not([type=range]):not([type=checkbox]),select,textarea{background:var(--bg)!important;box-shadow:var(--inset)!important;border:1px solid #d1dad5!important;border-radius:12px;color:var(--ink);padding:14px!important;min-height:48px;max-width:100%;backdrop-filter:none!important;transform:none!important}.input-label{position:static;display:block;padding:0!important;margin-bottom:8px;background:none!important;box-shadow:none;backdrop-filter:none;font-size:12px;color:var(--muted)}.input-group{min-width:0}.result-container,.formula-box,.preview-container,.chart-container,.prop-item,.feedback-item,.coord-readout,.modal-symbol,.keyboard-hint{background:var(--bg)!important;box-shadow:var(--inset);border:0!important;backdrop-filter:none!important;border-radius:16px}.result-value,.feedback-val{overflow-wrap:anywhere}.result-item{gap:12px}.result-label{min-width:0}.formula-box{padding:20px}.element-tile{box-shadow:3px 3px 6px #c8d0cc,-3px -3px 6px #fff;border:1px solid #f5f8f6;backdrop-filter:none;border-radius:10px}.element-tile:active{box-shadow:var(--inset);transform:scale(.96)}.periodic-wrapper{padding:8px 4px 20px;overscroll-behavior-x:contain}.modal-card{max-height:90dvh;overflow-y:auto}.action-btn{color:var(--accent)}.close-btn{width:44px;height:44px}.sidebar-toggle{display:none!important}input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:44px!important;background:transparent!important;box-shadow:none!important;cursor:pointer;touch-action:pan-y;padding:0!important}input[type=range]::-webkit-slider-runnable-track{height:10px;border-radius:20px;background:linear-gradient(to right,var(--accent) var(--progress,50%),#d5ded8 var(--progress,50%));box-shadow:inset 2px 2px 4px #b6c4bc,inset -2px -2px 4px #fff}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;margin-top:-8px;border-radius:50%;border:5px solid var(--bg);background:var(--accent);box-shadow:3px 3px 6px #aebeb4,-3px -3px 6px #fff;transition:transform .15s}input[type=range]:active::-webkit-slider-thumb{transform:scale(1.15)}input[type=range]::-moz-range-track{height:10px;border-radius:20px;background:#d5ded8;box-shadow:var(--inset)}input[type=range]::-moz-range-progress{background:var(--accent);height:10px;border-radius:20px}input[type=range]::-moz-range-thumb{width:18px;height:18px;border:5px solid var(--bg);border-radius:50%;background:var(--accent);box-shadow:var(--small)}
.site-top{max-width:1220px;margin:auto;padding:30px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px}.site-brand{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:750;letter-spacing:-.6px;text-decoration:none}.brand-mark{width:44px;height:44px;border-radius:14px;box-shadow:var(--small);display:grid;place-items:center}.brand-mark img{width:35px;height:35px}.site-top nav{display:flex;gap:24px;align-items:center;font-size:13px}.quiet-link{text-decoration:none;color:var(--muted)}.workspace{max-width:1156px;margin:0 auto;padding:25px 0 50px}.eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;color:var(--accent);font-weight:750}.hero{display:grid;grid-template-columns:1fr 330px;align-items:center;gap:70px;padding:30px 0 46px}.hero h1{font-size:clamp(36px,4.2vw,57px);line-height:1.14;letter-spacing:-2.7px;margin:18px 0}.hero h1 span{color:var(--accent)}.hero p{max-width:520px;color:var(--muted);font-size:15px;line-height:1.85}.hero-art{height:230px;display:grid;place-items:center;position:relative}.orbit{width:202px;height:202px;border-radius:50%;box-shadow:var(--raised);display:grid;place-items:center}.orbit-inner{width:143px;height:143px;border-radius:50%;box-shadow:var(--inset);display:grid;place-items:center;font-size:54px;font-weight:500;color:var(--accent)}.floating-symbol{position:absolute;width:58px;height:58px;display:grid;place-items:center;border-radius:18px;background:var(--bg);box-shadow:var(--small);font-size:24px;color:var(--accent)}.floating-symbol.a{top:5px;right:26px;transform:rotate(12deg)}.floating-symbol.b{bottom:12px;left:25px;transform:rotate(-12deg)}.section-bar{display:flex;justify-content:space-between;gap:24px;align-items:center;margin:12px 0 28px}.section-bar h2{font-size:20px;letter-spacing:-.5px;margin:0}.section-bar p{font-size:12px;color:var(--muted);margin:5px 0}.search-box{width:270px;position:relative}.search-box input{width:100%;padding-left:40px!important;font-size:13px}.search-box svg{position:absolute;top:16px;left:14px;width:17px;z-index:1}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:27px}.tool-card{display:flex;flex-direction:column;padding:25px 27px;text-decoration:none;transition:transform .22s,box-shadow .22s;min-height:265px;position:relative}.tool-card:hover{transform:translateY(-5px);box-shadow:12px 12px 24px #c5cec8,-10px -10px 22px #fff!important}.tool-card:active{transform:scale(.98);box-shadow:var(--inset)!important}.tool-head{display:flex;justify-content:space-between;align-items:center}.tool-icon{height:49px;width:49px;display:grid;place-items:center;border-radius:15px;box-shadow:var(--inset);color:var(--tool-color,var(--accent))}.tool-icon svg{width:25px;height:25px;stroke-width:1.6}.tool-number{font-size:11px;color:var(--muted);letter-spacing:1px}.tool-card h3{font-size:19px;letter-spacing:-.5px;margin:23px 0 8px}.tool-card p{font-size:12px;line-height:1.8;color:var(--muted);margin:0 0 21px}.card-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:auto;font-size:10px;color:var(--muted)}.card-arrow{width:30px;height:30px;border-radius:50%;box-shadow:var(--small);display:grid;place-items:center;font-size:17px;color:var(--accent);transition:transform .2s}.tool-card:hover .card-arrow{transform:translateX(3px)}.new-tag{font-size:9px;letter-spacing:1px;font-weight:750;color:var(--accent);background:#d6e5dc;padding:4px 7px;border-radius:6px}.bottom-note{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:24px;border-top:1px solid #cfd9d2;font-size:12px;color:var(--muted)}.page-heading{margin:20px 0 30px}.page-heading h1{font-size:38px;letter-spacing:-1.4px;margin:12px 0}.page-heading p{color:var(--muted)}.utility-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:28px}.utility-panel{padding:30px;min-width:0}.utility-panel h2{font-size:19px;margin:0 0 20px}.field{display:block;font-size:13px;color:var(--muted);margin-bottom:18px}.field input,.field select,.field textarea{display:block;width:100%;margin-top:8px}.button-row{display:flex;gap:14px;flex-wrap:wrap}.timer-face{height:270px;width:270px;max-width:100%;margin:30px auto;border-radius:50%;box-shadow:var(--raised);display:flex;align-items:center;justify-content:center;flex-direction:column;border:12px solid var(--bg);outline:2px solid #cbd8cf}.timer-face output{font-size:58px;letter-spacing:-3px;font-variant-numeric:tabular-nums}.timer-face span{font-size:11px;letter-spacing:2px;color:var(--accent);text-transform:uppercase}.timer-actions{justify-content:center}.status{min-height:24px;color:var(--accent);font-size:13px;margin:18px 0}.task-row{display:flex;align-items:center;gap:12px;margin-top:12px;padding:12px;border-radius:12px;box-shadow:var(--inset)}.task-row span{flex:1;overflow-wrap:anywhere}.task-row input{width:20px;height:20px;accent-color:var(--accent)}.task-row button{padding:6px 12px}.task-row:has(input:checked) span{text-decoration:line-through;color:var(--muted)}.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.metric{padding:17px;border-radius:14px;box-shadow:var(--inset);min-width:0}.metric span{font-size:11px;color:var(--muted);display:block}.metric output{font-size:23px;overflow-wrap:anywhere}.hint{font-size:12px;color:var(--muted);line-height:1.8}.histogram{height:130px;display:flex;align-items:flex-end;gap:8px;margin:26px 0 8px}.histogram div{flex:1;background:#6b9580;border-radius:6px 6px 0 0;min-height:2px}.mobile-nav-select{display:none}.empty-state{padding:35px;text-align:center;grid-column:1/-1;color:var(--muted)}[hidden]{display:none!important}
@media(min-width:901px) and (max-width:1250px){.function-lab .main-content{flex-direction:column;overflow:auto}.dashboard-pane{width:100%;flex-shrink:0;overflow:visible}.chart-pane{min-height:430px;flex-shrink:0}}
@media(max-width:1200px){.workspace{padding-left:30px;padding-right:30px}.hero{gap:25px}.tool-grid{gap:22px}.sidebar{width:230px}.main-content{padding:24px}.dashboard-pane{min-width:0}}
@media(max-width:900px){body:has(.app-container){height:auto;min-height:100dvh;display:block;overflow:auto}.app-container{display:block;height:auto}.sidebar{position:static!important;transform:none!important;width:100%!important;height:auto!important;padding:18px 22px!important;overflow:visible;box-shadow:0 4px 12px #ced6d1!important;z-index:20}.sidebar-header{padding:0;margin:0}.sidebar-header h1{font-size:18px;margin-bottom:15px}.brand-link{margin-bottom:9px}.nav-scroll{display:none!important}.mobile-nav-select{display:block;width:100%}.main-content{display:block;padding:24px 18px;overflow:visible}.dashboard-pane{width:100%;overflow:visible;padding:0}.chart-pane{min-height:390px;margin-top:25px}.chart-container{min-height:330px}.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{grid-template-columns:1fr 220px}.hero-art{transform:scale(.85)}.utility-grid{grid-template-columns:1fr}.card{padding:23px}.page{max-width:100%}.calc-layout{flex-direction:column!important}.preview-container{min-height:240px}.result-container{padding:18px}.modal-card{padding:25px}.modal-overlay{z-index:1000}}
@media(max-width:600px){.site-top{padding:22px 20px}.site-brand{font-size:15px;gap:10px}.site-top nav .quiet-link{display:none}.site-top nav{gap:10px}.site-top .button{font-size:12px;padding:10px 13px}.workspace{padding:10px 20px 32px}.hero{display:block;padding:20px 0 25px}.hero-art{display:none}.hero h1{font-size:41px;letter-spacing:-2px}.hero p{font-size:14px}.section-bar{align-items:stretch;flex-direction:column;gap:16px}.search-box{width:100%}.tool-grid{grid-template-columns:1fr;gap:23px}.tool-card{min-height:230px;padding:24px}.tool-card h3{margin-top:18px}.bottom-note{flex-direction:column;gap:8px}.utility-panel{padding:23px}.page-heading h1{font-size:31px}.timer-face{width:230px;height:230px}.timer-face output{font-size:51px}.inputs-grid{grid-template-columns:1fr!important}.card h2{font-size:22px}.prop-grid{gap:10px}.result-value{font-size:20px}.modal-header{gap:12px}.modal-info h3{font-size:21px}}
button[aria-pressed=true]{box-shadow:var(--inset);color:var(--accent)}.panel-left,.panel-right{min-width:0}.inputs-container{background:var(--bg)!important;border:0!important}.orbit-inner{position:relative}.orbit-inner span{position:absolute;right:38px;bottom:27px}.surface h1{line-height:1.2}.function-lab .dashboard-pane{flex-shrink:0}.function-lab .chart-pane{min-width:260px}.search-box input[type=search]{padding-left:40px!important}.hero h1{font-size:clamp(27px,4.1vw,57px);letter-spacing:-1.5px}.material-symbols-outlined{display:inline-flex!important;align-items:center;justify-content:center;width:24px;height:24px;flex-shrink:0;font-size:0!important}.material-symbols-outlined svg{width:24px;height:24px}.bottom-note{justify-content:flex-end}
.mobile-menu-btn{display:none!important}
@media(max-width:360px){.site-top{flex-wrap:wrap;gap:15px}.hero h1{font-size:30px}.tool-card{padding:22px}.function-lab .chart-pane{min-width:0;padding:14px}}
@media(max-width:1100px){.card:has(.panel-left){grid-template-columns:1fr}.panel-right{min-height:260px}.function-lab .dashboard-pane{width:100%}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}