:root{--bg:#0f1417;--surface:#172126;--border:#2b3a43;--text:#ecf6f8;--muted:#8babb5;--accent:#7dd3fc;--accent-strong:#38bdf8;--success:#34d399;--warning:#fbbf24;--danger:#f87171;--font-size:16px}.high-contrast{--bg:#000;--surface:#111;--border:#fff;--text:#fff;--muted:#ccc;--accent:#ff0;--accent-strong:#ff0}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-size:var(--font-size)}body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;min-height:100vh}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}button,input,select,textarea{font-family:inherit;font-size:inherit}.app-layout{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--surface);border-right:1px solid var(--border);padding:24px 0;display:flex;flex-direction:column;flex-shrink:0}.sidebar-logo{padding:0 20px 24px;font-size:1.1rem;font-weight:700;color:var(--accent);letter-spacing:-.02em}.sidebar-nav{flex:1 1}.sidebar-nav a{display:block;padding:10px 20px;color:var(--muted);font-size:.9rem;border-left:3px solid transparent;transition:color .15s,border-color .15s}.sidebar-nav a.active,.sidebar-nav a:hover{color:var(--text);border-left-color:var(--accent);text-decoration:none}.main-content{flex:1 1;padding:32px;overflow-y:auto}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:24px}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:8px;font-weight:600;font-size:.95rem;cursor:pointer;border:none;transition:opacity .15s}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#000}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-danger{background:var(--danger);color:#fff}.field-label{display:block;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:6px;margin-top:16px}.field-input{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);padding:10px 12px;font-size:1rem}.field-input:focus{outline:none;border-color:var(--accent)}.mode-bar{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:24px}.mode-btn{padding:8px 16px;border-radius:20px;border:1px solid var(--border);background:var(--surface);color:var(--muted);font-size:.85rem;cursor:pointer;transition:all .15s;font-weight:500}.mode-btn:hover{color:var(--text);border-color:var(--accent)}.mode-btn.active{background:var(--accent);border-color:var(--accent);color:#000;font-weight:700}.response-panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;margin-top:20px;min-height:120px}.response-text{color:var(--text);font-size:1.05rem;line-height:1.7;white-space:pre-wrap}.suggestions-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.suggestion-chip{padding:6px 14px;border-radius:16px;border:1px solid var(--border);background:var(--bg);color:var(--muted);font-size:.8rem;cursor:pointer;transition:all .15s}.suggestion-chip:hover{border-color:var(--accent);color:var(--text)}.record-btn{width:80px;height:80px;border-radius:50%;border:3px solid var(--accent);background:var(--surface);color:var(--accent);font-size:2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s;margin:0 auto}.record-btn.recording{background:var(--danger);border-color:var(--danger);color:#fff;animation:pulse 1s infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.08)}}.gaze-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:12px;gap:12px;max-width:600px;margin:0 auto}.gaze-cell{background:var(--surface);border:2px solid var(--border);border-radius:12px;padding:20px 12px;text-align:center;font-size:.9rem;color:var(--muted);cursor:pointer;position:relative;overflow:hidden;transition:border-color .1s;min-height:80px;display:flex;align-items:center;justify-content:center}.gaze-cell.gazing{border-color:var(--accent);color:var(--text)}.gaze-cell .gaze-progress{position:absolute;bottom:0;left:0;height:4px;background:var(--accent);transition:width .1s linear}.switch-options{display:flex;flex-direction:column;gap:10px;max-width:480px;margin:0 auto}.switch-option{padding:16px 20px;border-radius:10px;border:2px solid var(--border);background:var(--surface);color:var(--text);text-align:left;cursor:pointer;font-size:1rem;transition:all .1s}.switch-option.focused{border-color:var(--accent);background:rgba(125,211,252,.08)}.switch-option.activated{background:var(--accent);color:#000}.badge{display:inline-block;padding:3px 8px;border-radius:10px;font-size:.72rem;font-weight:600}.badge-blue{background:rgba(125,211,252,.15);color:var(--accent)}.badge-green{background:rgba(52,211,153,.15);color:var(--success)}.alert-error{background:hsla(0,91%,71%,.1);border:1px solid hsla(0,91%,71%,.3);border-radius:8px;color:var(--danger);padding:12px 16px;margin-bottom:16px;font-size:.9rem}.history-table{width:100%;border-collapse:collapse}.history-table th{text-align:left;padding:8px 12px;color:var(--muted);font-size:.75rem;text-transform:uppercase;letter-spacing:.05em}.history-table td,.history-table th{border-bottom:1px solid var(--border)}.history-table td{padding:12px;font-size:.9rem;vertical-align:top}.history-table tr:last-child td{border-bottom:none}.a11y-bar{gap:16px;padding:8px 0;margin-bottom:24px;flex-wrap:wrap}.a11y-bar,.a11y-bar label{display:flex;align-items:center}.a11y-bar label{font-size:.8rem;color:var(--muted);gap:6px}.a11y-bar input[type=range]{width:80px}.sign-video-wrap{position:relative;width:320px;margin:0 auto 16px;border-radius:12px;overflow:hidden;border:2px solid var(--border);background:#000}.sign-video-wrap video{width:100%;display:block;transform:scaleX(-1)}.sign-overlay{position:absolute;bottom:0;left:0;right:0;background:rgba(0,0,0,.6);color:var(--text);padding:8px 12px;font-size:.85rem}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}.page-title{font-size:1.5rem;font-weight:700;color:var(--text)}.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{width:100%;max-width:440px;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:40px}.auth-logo{font-size:1.4rem;font-weight:700;color:var(--accent);margin-bottom:8px}.auth-tagline{color:var(--muted);font-size:.9rem;margin-bottom:32px}.auth-footer{margin-top:20px;color:var(--muted);font-size:.85rem;text-align:center}