:root{--bg: #0d1117;--bg-sidebar: #161b22;--bg-input: #0d1117;--border: #21262d;--border-focus: #388bfd;--text: #c9d1d9;--text-muted: #6e7681;--text-heading: #f0f6fc;--accent: #388bfd;--row-hover-bg: #1c2128}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;font-size:13px;overflow:hidden}.app{display:flex;flex-direction:column;height:100vh}header{display:flex;align-items:center;gap:10px;padding:0 20px;height:48px;border-bottom:1px solid var(--border);flex-shrink:0}header h1{font-size:15px;font-weight:600;color:var(--text-heading)}header .tag{font-size:11px;color:var(--text-muted);background:var(--bg-input);border:1px solid var(--border);border-radius:20px;padding:2px 9px}header .source-link{font-size:12px;color:var(--text-muted);text-decoration:none;padding:6px;border:1px solid var(--border);border-radius:4px;background:var(--bg-input)}header .source-link:hover{background:var(--row-hover-bg);border-color:var(--border-focus)}.layout{display:flex;flex:1;overflow:hidden}.sidebar{width:260px;flex-shrink:0;background:var(--bg-sidebar);border-right:1px solid var(--border);overflow-y:auto;display:flex;flex-direction:column}.section{padding:14px 16px;border-bottom:1px solid var(--border)}.section-title{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.09em;color:var(--text-muted);margin-bottom:12px}input[type=text]{width:100%;background:var(--bg-input);border:1px solid var(--border);border-radius:6px;color:var(--text);padding:6px 10px;font-size:13px;outline:none;transition:border-color .15s}input[type=text]:focus{border-color:var(--border-focus)}.btn-row{display:flex;gap:6px;margin-top:8px}button{flex:1;background:var(--bg-input);border:1px solid var(--border);border-radius:6px;color:var(--text);padding:6px 8px;font-size:12px;cursor:pointer;transition:border-color .15s,color .15s}button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}button:disabled{opacity:.45;cursor:not-allowed}.status{margin-top:8px;font-size:11px;color:var(--text-muted);min-height:16px;word-break:break-word}.control-row{display:grid;grid-template-columns:88px 1fr 34px;align-items:center;gap:8px;margin-bottom:11px}.control-row:last-child{margin-bottom:0}.control-row label{font-size:11px;color:var(--text-muted)}.control-row input[type=range]{min-width:0;accent-color:var(--accent);cursor:pointer}.control-row .val{text-align:right;font-size:11px;font-variant-numeric:tabular-nums;color:var(--text)}.color-swatch{width:28px;height:16px;flex-shrink:0;border:1px solid var(--border);border-radius:3px;overflow:hidden;position:relative;cursor:pointer}.color-swatch input[type=color]{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:200%;height:200%;border:none;padding:0;cursor:pointer}#color-palette{position:absolute;background:var(--bg-sidebar);border:1px solid var(--border);border-radius:6px;padding:8px;z-index:1000;box-shadow:0 4px 12px #0000004d}.palette-colors{display:grid;grid-template-columns:repeat(5,20px);gap:4px;margin-bottom:8px}.palette-color{width:20px;height:20px;border:1px solid var(--border);border-radius:3px;cursor:pointer}.palette-color:hover{border-color:var(--accent)}#custom-color-btn{width:100%;padding:4px;font-size:11px}#chains-list{display:flex;flex-direction:column;gap:2px}.chain-row{display:flex;align-items:center;gap:8px;padding:5px 6px;border-radius:5px;cursor:default;transition:background .1s}.chain-row.is-hovered,.chain-row:hover{background:var(--row-hover-bg)}.chain-badge{font-family:SF Mono,Fira Code,monospace;font-size:12px;font-weight:700;color:var(--text-heading)}.chain-label{flex:1;font-size:11px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.residue-filter{margin-bottom:10px}.residue-list{max-height:320px;overflow-y:auto}#residues-list{display:flex;flex-direction:column;gap:1px}.residue-row{display:flex;align-items:center;gap:6px;padding:3px 6px;border-radius:4px;cursor:default;transition:background .1s}.residue-row.is-hovered,.residue-row:hover{background:var(--row-hover-bg)}.residue-id{flex:1;font-family:SF Mono,Fira Code,monospace;font-size:11px;color:var(--text)}.residue-aa{font-size:11px;color:var(--text-muted)}.canvas-area{flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden;background:var(--bg)}#protein-canvas canvas{display:block}.hidden{display:none!important}::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}