:root{--bg: #161f1a;--surface-1: #1e2b23;--surface-2: #28382e;--text: #f3efe2;--text-muted: #aebbaf;--accent: #ffcf56;--accent-support: #ff8a3d;--success: #7ed9a4;--danger: #ff6b6b;--font-display: "Fraunces", Georgia, serif;--font-ui: "JetBrains Mono", ui-monospace, monospace;--space-1: 8px;--space-2: 16px;--space-3: 24px;--space-4: 32px;--space-6: 48px;--space-8: 64px;--radius: 10px;--radius-sm: 6px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:var(--font-ui);font-size:16px;line-height:1.5;min-height:100vh}#app{min-height:100vh;display:flex;flex-direction:column}h1,h2,h3{font-family:var(--font-display);font-weight:600;line-height:1.2;margin:0}a{color:var(--accent)}button{font-family:var(--font-ui)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}body{background:radial-gradient(ellipse at top,rgba(255,207,86,.06),transparent 55%),radial-gradient(ellipse at bottom,rgba(0,0,0,.35),transparent 65%),var(--bg)}.app-shell{display:flex;flex-direction:column;min-height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-3) var(--space-4);gap:var(--space-3)}.wordmark{font-size:26px;letter-spacing:.01em;display:flex;align-items:baseline;gap:10px}.wordmark__glyph{color:var(--accent);font-size:1.3em;text-shadow:0 0 18px rgba(255,207,86,.45)}.header-actions{display:flex;align-items:center;gap:var(--space-1)}.repo-link{text-decoration:none;display:inline-flex;align-items:center}@media (max-width: 480px){.app-header{padding:var(--space-2) var(--space-3);flex-wrap:wrap}.wordmark{font-size:18px;white-space:nowrap}.mute-btn{white-space:nowrap;padding:8px 10px}}.layout{flex:1;display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,380px);gap:var(--space-4);padding:0 var(--space-4) var(--space-4);align-items:stretch}@media (max-width: 900px){.layout{grid-template-columns:minmax(0,1fr)}}.board-pane,.control-pane{min-width:0}.board-pane{display:flex;flex-direction:column;gap:var(--space-2);min-height:60vh}.board{flex:1;min-height:60vh;display:flex;align-items:center;justify-content:center;padding:var(--space-6) var(--space-4);border-radius:var(--radius);background:linear-gradient(180deg,rgba(255,255,255,.02),transparent 40%),var(--surface-1);box-shadow:0 1px 2px #0006,0 8px 24px #00000059,inset 0 0 0 1px #ffffff08;position:relative}.board-content{max-width:100%;text-align:center;font-family:var(--font-ui);font-size:clamp(20px,3.4vw,34px);line-height:1.6;overflow-wrap:break-word}.board-empty{color:var(--text-muted);font-size:18px;max-width:42ch;line-height:1.6}.board-empty strong{color:var(--accent)}.board__rewrite{background:none;color:var(--accent);border-bottom:2px solid var(--accent);border-radius:4px;padding:0 2px;animation:chalk-pulse .6s ease-out}@keyframes chalk-pulse{0%{color:var(--text);text-shadow:none}35%{color:var(--accent);text-shadow:0 0 14px rgba(255,207,86,.6)}to{color:var(--accent);text-shadow:0 0 6px rgba(255,207,86,.25)}}.tok--symbol{color:var(--text)}.tok--number{color:var(--success)}.tok--boolean,.tok--string{color:var(--accent-support)}.tok--paren,.tok--quote{color:var(--text-muted)}.board-status{text-align:center;color:var(--text-muted);font-size:14px;min-height:1.2em}.control-pane{display:flex;flex-direction:column;gap:var(--space-3)}.panel{background:var(--surface-1);border-radius:var(--radius);padding:var(--space-3);box-shadow:0 1px 2px #0006,0 8px 24px #00000059}.panel-label{display:block;font-family:var(--font-display);font-size:14px;font-weight:600;letter-spacing:.03em;text-transform:uppercase;color:var(--text-muted);margin-bottom:var(--space-1)}.source-input{width:100%;min-height:140px;resize:vertical;background:var(--surface-2);color:var(--text);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius-sm);padding:var(--space-2);font-family:var(--font-ui);font-size:14px;line-height:1.5;transition:border-color .16s ease-out,box-shadow .16s ease-out}.source-input:hover{border-color:#ffcf5659}.source-input:focus-visible{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #ffcf5633}.examples-row{display:flex;flex-wrap:wrap;gap:var(--space-1);margin:var(--space-2) 0}.btn{font-family:var(--font-ui);font-weight:500;font-size:14px;color:var(--text);background:var(--surface-2);border:1px solid rgba(255,255,255,.07);border-radius:var(--radius-sm);padding:10px 16px;min-height:44px;cursor:pointer;transition:transform .12s ease-out,background-color .16s ease-out,border-color .16s ease-out,box-shadow .16s ease-out}.btn:hover:not(:disabled){border-color:#ffcf5666;background:#2f4136}.btn:active:not(:disabled){transform:translateY(1px) scale(.98)}.btn:focus-visible{outline:none;box-shadow:0 0 0 3px #ffcf5659}.btn:disabled{opacity:.4;cursor:not-allowed}.btn--primary{width:100%;background:var(--accent);color:#1a1408;border-color:transparent;font-weight:700}.btn--primary:hover:not(:disabled){background:#ffd873;border-color:transparent}.btn--chip{font-size:13px;padding:8px 12px;min-height:44px;border-radius:999px;background:var(--surface-1)}.btn--chip:hover:not(:disabled){color:var(--accent)}.controls-block{display:flex;gap:var(--space-1);flex-wrap:wrap}.controls-block .btn{flex:1;min-width:80px}.btn--accent{border-color:var(--accent);color:var(--accent)}.btn--accent:hover:not(:disabled){background:#ffcf561f}.icon-btn{background:var(--surface-1);border:1px solid rgba(255,255,255,.07);border-radius:var(--radius-sm);color:var(--text-muted);font-family:var(--font-ui);font-size:13px;padding:8px 14px;min-height:44px;cursor:pointer;transition:color .16s ease-out,border-color .16s ease-out}.icon-btn:hover{color:var(--accent);border-color:#ffcf5666}.icon-btn:focus-visible{outline:none;box-shadow:0 0 0 3px #ffcf5659}.icon-btn[aria-pressed=true]{color:var(--accent-support)}.history-block{flex:1;min-height:0;display:flex;flex-direction:column}.history-list{list-style:none;margin:0;padding:0;overflow-y:auto;max-height:320px;display:flex;flex-direction:column;gap:4px}.history-item__btn{display:block;width:100%;text-align:left;background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);color:var(--text-muted);font-family:var(--font-ui);font-size:12.5px;padding:0 10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:pointer;transition:background-color .16s ease-out,color .16s ease-out;min-height:44px;line-height:44px}.history-item__btn:hover{background:var(--surface-2);color:var(--text)}.history-item__btn:focus-visible{outline:none;box-shadow:0 0 0 3px #ffcf564d}.history-item--current .history-item__btn{background:#ffcf561f;color:var(--accent);border-color:#ffcf564d;font-weight:600}.board-error{border:1px solid rgba(255,107,107,.4);background:#ff6b6b14;color:var(--danger);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-3);font-size:14px;text-align:center;text-decoration:underline wavy rgba(255,107,107,.5);text-underline-offset:4px}.board-error[hidden]{display:none}.board--celebrate{animation:board-glow .9s ease-out}@keyframes board-glow{0%{box-shadow:0 1px 2px #0006,0 8px 24px #00000059,inset 0 0 0 1px #ffffff08}30%{box-shadow:0 1px 2px #0006,0 8px 24px #00000059,inset 0 0 0 2px #7ed9a499,0 0 40px #7ed9a459}to{box-shadow:0 1px 2px #0006,0 8px 24px #00000059,inset 0 0 0 1px #ffffff08}}.chalk-dust{position:absolute;top:45%;width:6px;height:6px;border-radius:2px;background:var(--accent);pointer-events:none;animation:dust-burst .9s ease-out forwards;animation-delay:var(--delay, 0ms)}.chalk-dust:nth-child(3n+1){background:var(--accent-support)}.chalk-dust:nth-child(3n+2){background:var(--success)}@keyframes dust-burst{0%{transform:translate(0) rotate(0);opacity:1}to{transform:translate(var(--dx, 0),120px) rotate(var(--rot, 90deg));opacity:0}}@media (prefers-reduced-motion: reduce){.board--celebrate{animation:none}}.page-about{border-top:1px solid rgba(255,255,255,.06);padding:var(--space-8) var(--space-4)}.page-about__inner{max-width:70ch;margin:0 auto;display:flex;flex-direction:column;gap:var(--space-2)}.page-about__title{font-size:clamp(24px,4vw,34px);margin-bottom:var(--space-1)}.page-about__subtitle{font-size:20px;margin-top:var(--space-4);color:var(--accent)}.page-about p{color:var(--text-muted);margin:0}.page-about code{font-family:var(--font-ui);color:var(--accent);background:var(--surface-1);border-radius:4px;padding:1px 6px;font-size:.9em}.faq{margin:0;display:flex;flex-direction:column;gap:var(--space-2)}.faq dt{font-family:var(--font-display);font-weight:600;color:var(--text);margin-bottom:4px}.faq dd{margin:0;color:var(--text-muted)}.page-about__cta{align-self:flex-start;width:auto;margin-top:var(--space-3);text-decoration:none;display:inline-flex;align-items:center;min-height:44px}.page-footer{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--space-2);padding:var(--space-3) var(--space-4);border-top:1px solid rgba(255,255,255,.06);color:var(--text-muted);font-size:13px}.page-footer__link{color:var(--text-muted);text-decoration:none;transition:color .16s ease-out}.page-footer__link:hover{color:var(--accent)}.page-footer__portfolio{margin-left:auto}