:root{--color-bg: #0d1117;--color-surface: #161b22;--color-border: #30363d;--color-text: #e6edf3;--color-text-muted: #7d8590;--color-code: #79c0ff;--color-green: #3fb950;--color-yellow: #d29922;--color-red: #f85149;--color-walk: #3fb950;--color-dont-walk: #f85149;--color-composite: #58a6ff;--color-btn-bg: #238636;--color-btn-hover: #2ea043;--color-btn-active: #1a7f37;--color-btn-text: #ffffff;--font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;--transition-speed: .2s}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}body{background-color:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);line-height:1.6;min-height:100vh}.app{display:flex;flex-direction:column;min-height:100vh;padding:1.5rem;gap:1.5rem}.app-header{text-align:center}.app-title{font-size:1.5rem;font-weight:600;letter-spacing:-.01em}.app-subtitle{color:var(--color-text-muted);font-size:.875rem;margin-top:.25rem}.app-subtitle code{font-family:var(--font-mono);color:var(--color-code);font-size:.8125rem}.app-main{display:flex;gap:1.5rem;align-items:flex-start;flex:1}.canvas-panel{flex-shrink:0;background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:8px;overflow:hidden}#intersection-canvas{display:block}.side-panel{flex:1;min-width:0;display:flex;flex-direction:column;gap:1.25rem}.state-panel{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:8px;padding:1rem 1.25rem}.panel-title{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--color-text-muted);margin-bottom:.75rem}.composite-state{font-family:var(--font-mono);font-size:1.125rem;font-weight:700;color:var(--color-composite);margin-bottom:.875rem;word-break:break-all}.state-details{display:flex;flex-direction:column;gap:.375rem}.state-row{display:flex;justify-content:space-between;align-items:center;gap:.5rem}.state-label{font-size:.8125rem;color:var(--color-text-muted);flex-shrink:0}.state-value{font-family:var(--font-mono);font-size:.8125rem;color:var(--color-text);text-align:right}.controls-section{display:flex;flex-direction:column;align-items:flex-start;gap:.5rem}.start-btn{font-family:var(--font-sans);font-size:.9375rem;font-weight:600;color:var(--color-btn-text);background-color:var(--color-composite);border:1px solid transparent;border-radius:6px;padding:.625rem 1.25rem;cursor:pointer;transition:background-color var(--transition-speed) ease,opacity var(--transition-speed) ease;width:100%}.start-btn:hover:not(:disabled){background-color:#79c0ff}.start-btn:disabled{opacity:.5;cursor:default}.pedestrian-btn{font-family:var(--font-sans);font-size:.9375rem;font-weight:600;color:var(--color-btn-text);background-color:var(--color-btn-bg);border:1px solid transparent;border-radius:6px;padding:.625rem 1.25rem;cursor:pointer;transition:background-color var(--transition-speed) ease;width:100%}.pedestrian-btn:hover{background-color:var(--color-btn-hover)}.pedestrian-btn:active{background-color:var(--color-btn-active)}.pedestrian-btn:disabled{opacity:.5;cursor:default}.pedestrian-btn.btn--pressed{background-color:var(--color-btn-active);box-shadow:inset 0 0 0 2px #fff3}.btn-hint{font-size:.75rem;color:var(--color-text-muted);line-height:1.4}.log-section{flex:1;display:flex;flex-direction:column;min-height:0}.log-title{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--color-text-muted);margin-bottom:.625rem}.log-list{list-style:none;display:flex;flex-direction:column;gap:.25rem;max-height:20rem;overflow-y:auto;-webkit-mask-image:linear-gradient(to bottom,black 0%,black calc(100% - 1.5rem),transparent 100%);mask-image:linear-gradient(to bottom,black 0%,black calc(100% - 1.5rem),transparent 100%)}.log-entry{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:.5rem;padding:.375rem .625rem;background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:4px;font-family:var(--font-mono);font-size:.75rem;animation:slide-in .2s ease-out both}.log-entry--transitioned .log-entry-event{color:var(--color-green)}.log-entry--deferred .log-entry-event{color:var(--color-yellow)}.log-entry--nohandler .log-entry-event{color:var(--color-text-muted)}.log-entry--handling .log-entry-event{color:var(--color-code)}.log-entry-event{font-weight:700;white-space:nowrap}.log-entry-detail{color:var(--color-text-muted);font-size:.6875rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.log-entry-time{color:var(--color-text-muted);font-size:.625rem;white-space:nowrap}@keyframes slide-in{0%{opacity:0;transform:translateY(.375rem)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.log-entry{animation:none}}