:root{--color-bg: #0a1628;--color-surface-1: #0f1f3a;--color-surface-2: #16294a;--color-text: #e8f0fb;--color-text-muted: #7d92b3;--color-accent: #4fd1ff;--color-accent-support: #ffb454;--color-success: #6ee7a8;--color-danger: #ff6b6b;--color-grid-line: rgba(79, 209, 255, .08);--font-display: "Space Grotesk", system-ui, sans-serif;--font-ui: "IBM Plex Sans", system-ui, sans-serif;--space-1: 4px;--space-2: 8px;--space-3: 16px;--space-4: 24px;--space-5: 32px;--space-6: 48px;--radius-sm: 4px;--radius-md: 8px;--glow-accent: 0 0 24px rgba(79, 209, 255, .25);--ease-out: cubic-bezier(.16, 1, .3, 1);--transition-ui: .18s var(--ease-out)}*{box-sizing:border-box}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}html,body{margin:0;padding:0;height:100%}body{background-color:var(--color-bg);background-image:linear-gradient(var(--color-grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--color-grid-line) 1px,transparent 1px);background-size:32px 32px;color:var(--color-text);font-family:var(--font-ui);-webkit-font-smoothing:antialiased}#app{min-height:100vh;display:flex;flex-direction:column}a{color:var(--color-accent)}button{font-family:inherit}@media (prefers-reduced-motion: reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important}}.site-header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-3);padding:var(--space-4) var(--space-5) var(--space-3);border-bottom:1px solid var(--color-grid-line)}.wordmark{font-family:var(--font-display);font-weight:700;font-size:1.75rem;letter-spacing:-.02em}.wordmark__accent{color:var(--color-accent)}.tagline{margin:var(--space-1) 0 0;color:var(--color-text-muted);font-size:.9rem}.site-header__actions{flex:0 0 auto;display:flex;align-items:center;gap:var(--space-2)}.header-link,.mute-toggle{flex:0 0 auto;display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:var(--color-surface-2);border:1px solid var(--color-grid-line);border-radius:var(--radius-sm);color:var(--color-text);cursor:pointer;transition:background-color var(--transition-ui),box-shadow var(--transition-ui),transform var(--transition-ui)}.header-link:hover{background:var(--color-surface-1);box-shadow:var(--glow-accent);color:var(--color-accent)}.header-link:active{transform:scale(.94)}.header-link:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.mute-toggle svg{stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;fill:currentColor}.mute-toggle path.mute-toggle__speaker{stroke:none}.mute-toggle path.mute-toggle__wave{fill:none}.mute-toggle path.mute-toggle__slash{fill:none;stroke:var(--color-danger);display:none}.mute-toggle.is-muted path.mute-toggle__wave{display:none}.mute-toggle.is-muted path.mute-toggle__slash{display:block}.mute-toggle:hover{background:var(--color-surface-1);box-shadow:var(--glow-accent)}.mute-toggle:active{transform:scale(.94)}.mute-toggle:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.layout{flex:1;display:flex;flex-wrap:wrap;gap:var(--space-4);padding:var(--space-4) var(--space-5)}.chart-panel{flex:3 1 560px;min-height:60vh;background:var(--color-surface-1);border:1px solid var(--color-grid-line);border-radius:var(--radius-md);padding:var(--space-4);box-shadow:var(--glow-accent)}.chart-panel__canvas{width:100%;height:100%}.tray{flex:1 1 240px;background:var(--color-surface-1);border:1px solid var(--color-grid-line);border-radius:var(--radius-md);padding:var(--space-4)}.tray__title{margin:0 0 var(--space-3);font-family:var(--font-display);font-size:1.1rem;font-weight:500}.tray__legend{display:flex;flex-wrap:wrap;gap:var(--space-3);margin:0 0 var(--space-4);padding-bottom:var(--space-3);border-bottom:1px solid var(--color-grid-line);font-size:.78rem}.tray__legend-item{display:inline-flex;align-items:center;gap:var(--space-1);color:var(--color-text-muted)}.tray__legend-dot{width:9px;height:9px;border-radius:50%;background:currentColor}.tray__legend-item[data-category=natural]{color:var(--color-success)}.tray__legend-item[data-category=metal]{color:var(--color-accent)}.tray__legend-item[data-category=synthetic-fiber]{color:var(--color-accent-support)}.tray__group+.tray__group{margin-top:var(--space-4)}.tray__group-heading{margin:0 0 var(--space-2);font-family:var(--font-display);font-size:.78rem;font-weight:500;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted)}.tray__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-2)}.tray__button{width:100%;min-height:44px;background:var(--color-surface-2);color:var(--color-text);border:1px solid var(--color-grid-line);border-left:3px solid transparent;border-radius:var(--radius-sm);padding:var(--space-2) var(--space-3);text-align:left;font-size:.95rem;cursor:grab;touch-action:none;transition:background-color var(--transition-ui),border-color var(--transition-ui),transform var(--transition-ui),box-shadow var(--transition-ui)}.tray__button[data-category=natural]{border-left-color:var(--color-success)}.tray__button[data-category=metal]{border-left-color:var(--color-accent)}.tray__button[data-category=synthetic-fiber]{border-left-color:var(--color-accent-support)}.tray__button.is-dragging{opacity:.4;cursor:grabbing}.drag-ghost{opacity:.9;box-shadow:var(--glow-accent);cursor:grabbing}.tray__button:hover:not(:disabled){background:var(--color-surface-1);box-shadow:var(--glow-accent)}.tray__button:active:not(:disabled){transform:scale(.98)}.tray__button:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.tray__button:disabled{background:var(--color-surface-1);color:var(--color-text-muted);border-color:var(--color-grid-line);border-left-color:var(--color-grid-line);cursor:default;opacity:.6;box-shadow:none}.strength-chart{width:100%;font-family:var(--font-ui)}.material-row{cursor:pointer}.material-row__hit{fill:transparent}.material-row__bar{fill:var(--color-accent);rx:4}.material-row:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.material-row__label{fill:var(--color-text);font-size:.85rem}.material-row__value{fill:var(--color-text-muted);font-size:.8rem;font-weight:500}.material-row__value--inside{fill:var(--color-bg);font-weight:600}.strength-chart__caption{fill:var(--color-text-muted);font-size:.7rem;letter-spacing:.02em;text-transform:uppercase}.strength-chart__empty{fill:var(--color-text-muted);font-size:.9rem;dominant-baseline:middle}.material-row__remove{cursor:pointer}.material-row__remove-hit{fill:transparent}.material-row__remove-circle{fill:var(--color-surface-2);stroke:var(--color-grid-line);stroke-width:1;transform-box:fill-box;transform-origin:center;transition:fill var(--transition-ui),stroke var(--transition-ui),transform .1s var(--ease-out)}.material-row__remove text{fill:var(--color-text-muted);font-size:.85rem;text-anchor:middle;pointer-events:none;transition:fill var(--transition-ui)}.material-row__remove:hover .material-row__remove-circle{fill:var(--color-danger);stroke:var(--color-danger)}.material-row__remove:hover text{fill:var(--color-text)}.material-row__remove:active .material-row__remove-circle{transform:scale(.92)}.material-row__remove:focus-visible{outline:none}.material-row__remove:focus-visible .material-row__remove-circle{stroke:var(--color-accent);stroke-width:2}@keyframes celebrate-bar{0%{fill:var(--color-accent-support);filter:drop-shadow(0 0 0 rgba(255,180,84,0))}35%{fill:var(--color-accent-support);filter:drop-shadow(0 0 14px rgba(255,180,84,.85))}to{fill:var(--color-accent);filter:drop-shadow(0 0 0 rgba(255,180,84,0))}}@keyframes celebrate-label{0%{fill:var(--color-accent-support)}35%{fill:var(--color-accent-support)}to{fill:var(--color-text)}}.material-row--celebrate .material-row__bar{animation:celebrate-bar .65s var(--ease-out) forwards}.material-row--celebrate .material-row__label{animation:celebrate-label .65s var(--ease-out) forwards}.material-tooltip{position:fixed;z-index:20;max-width:260px;background:var(--color-surface-2);border:1px solid var(--color-grid-line);border-radius:var(--radius-sm);box-shadow:var(--glow-accent);padding:var(--space-3);pointer-events:none}.material-tooltip[hidden]{display:none}.material-tooltip__name{margin:0 0 var(--space-2);font-family:var(--font-display);font-weight:500;font-size:1rem;color:var(--color-text)}.material-tooltip__stats{margin:0 0 var(--space-2);display:grid;grid-template-columns:auto auto;column-gap:var(--space-3);row-gap:var(--space-1);font-size:.8rem}.material-tooltip__stats dt{color:var(--color-text-muted)}.material-tooltip__stats dd{margin:0;text-align:right;color:var(--color-text);font-weight:500}.material-tooltip__fact{margin:0;color:var(--color-text-muted);font-size:.8rem;line-height:1.4}.page-section{border-top:1px solid var(--color-grid-line);padding:var(--space-6) var(--space-5)}.page-section__inner{max-width:68ch;margin:0 auto}.page-section__title{margin:0 0 var(--space-3);font-family:var(--font-display);font-weight:500;font-size:1.5rem;letter-spacing:-.01em}.explainer p{margin:0 0 var(--space-3);color:var(--color-text-muted);line-height:1.6}.explainer p:last-child{margin-bottom:0}.faq__list{margin:0}.faq__list dt{margin-top:var(--space-4);font-family:var(--font-display);font-weight:500;color:var(--color-text)}.faq__list dt:first-child{margin-top:0}.faq__list dd{margin:var(--space-2) 0 0;color:var(--color-text-muted);line-height:1.6}.site-footer{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--space-3);padding:var(--space-4) var(--space-5) var(--space-6);border-top:1px solid var(--color-grid-line)}.site-footer__cta{display:inline-flex;align-items:center;min-height:44px;padding:var(--space-2) var(--space-4);background:var(--color-surface-2);border:1px solid var(--color-accent);border-radius:var(--radius-sm);color:var(--color-accent);font-weight:500;text-decoration:none;transition:background-color var(--transition-ui),box-shadow var(--transition-ui)}.site-footer__cta:hover{background:var(--color-surface-1);box-shadow:var(--glow-accent)}.site-footer__cta:focus-visible,.site-footer__portfolio:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.site-footer__portfolio{color:var(--color-text-muted);font-size:.9rem;text-decoration:none}.site-footer__portfolio:hover{color:var(--color-accent)}@media (max-width: 768px){.layout{flex-direction:column}.chart-panel{min-height:50vh}}