:root{color-scheme:dark;--bg: #0a0e0c;--sidebar-bg: #0d1310;--panel: #121815;--panel-alt: #17201c;--border: #223027;--accent: #2ee6a8;--accent-soft: rgba(46, 230, 168, .08);--text: #e6f3ee;--text-dim: #8fa79c;--danger: #ff6b6b;--warning: #f0b429;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--text)}#app{height:100vh}h1,h2,h3{font-weight:600}button{font-family:inherit;cursor:pointer}.card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:16px}.app-shell{display:flex;height:100vh;width:100%;overflow:hidden}.sidebar{width:300px;flex-shrink:0;background:var(--sidebar-bg);border-right:1px solid var(--border);padding:20px 16px;overflow-y:auto;display:flex;flex-direction:column;gap:22px}.main{flex:1;display:flex;flex-direction:column;min-width:0}.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:.85em;letter-spacing:.08em}.brand-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent);flex-shrink:0}.btn-new-chat{background:var(--accent);color:#06140f;border:none;border-radius:8px;padding:11px 14px;font-weight:700;width:100%;font-size:.9em}.btn-new-chat:disabled{opacity:.6;cursor:not-allowed}.sidebar-section{display:flex;flex-direction:column;gap:8px}.sidebar-section-label{font-size:.7em;letter-spacing:.1em;text-transform:uppercase;color:var(--text-dim)}.selected-challenge-card{border:1px solid 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var(--border);color:var(--text-dim);font-size:.72em;letter-spacing:.08em;text-transform:uppercase}.injection-card{background:var(--panel-alt);border:1px dashed var(--border);border-radius:8px;padding:12px;flex-shrink:0;max-height:220px;overflow-y:auto}.injection-card-label{font-size:.7em;letter-spacing:.06em;text-transform:uppercase;color:var(--text-dim);margin-bottom:8px}.injection-card-body{margin:0;font-family:inherit;font-size:.8em;line-height:1.5;color:var(--text-dim);white-space:pre-wrap;word-break:break-word}.injection-marker{display:inline-block;color:var(--accent);font-weight:700;background:var(--accent-soft);border:1px solid var(--accent);border-radius:4px;padding:0 4px}.message-log{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:14px;padding:4px 4px 4px 0}.message{border-radius:10px;padding:14px 16px;border:1px solid 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var(--border);background:var(--panel-alt);text-align:left;color:var(--text)}.modal-challenge-row:hover{border-color:var(--accent)}.modal-challenge-row.active{border-color:var(--accent);background:var(--accent-soft)}.modal-challenge-row-top{display:flex;align-items:center;justify-content:space-between;gap:12px;font-weight:600}.modal-challenge-title{display:flex;align-items:center;gap:6px}.modal-challenge-points{color:var(--accent);font-weight:700;font-size:.85em;white-space:nowrap}.modal-challenge-sub{margin-top:4px;font-size:.78em;color:var(--text-dim);text-transform:capitalize}