:root{--bg:#0f1419;--bg-elevated:#1a222c;--bg-key:#243040;--bg-key-idle:#2a3848;--text:#e8eef4;--text-muted:#8b9aab;--accent:#3d9cf0;--pressed:#f0a030;--tested:#2db87a;--danger:#e25555;--border:#2e3a48;--font-display:"Segoe UI", "Helvetica Neue", sans-serif;--font-mono:ui-monospace, "SF Mono", Menlo, Consolas, monospace}*,:before,:after{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{font-family:var(--font-display);background:radial-gradient(ellipse 80% 50% at 50% -20%, #1a3a55 0%, transparent 55%), linear-gradient(180deg, #121820 0%, var(--bg) 40%);color:var(--text);-webkit-font-smoothing:antialiased}.app{flex-direction:column;min-height:100vh;display:flex}.topbar{border-bottom:1px solid var(--border);background:color-mix(in srgb, var(--bg-elevated) 88%, transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);flex-wrap:wrap;align-items:center;gap:12px 20px;padding:16px 24px;display:flex}.brand{letter-spacing:.02em;margin-right:8px;font-size:1.05rem;font-weight:650}.device-meta{color:var(--text-muted);font-size:.875rem;font-family:var(--font-mono);flex-wrap:wrap;gap:8px 16px;display:flex}.device-meta strong{color:var(--text);font-weight:600}.actions{flex-wrap:wrap;gap:8px;margin-left:auto;display:flex}.progress{color:var(--text-muted);font-size:.9rem}.progress strong{color:var(--tested)}button{appearance:none;border:1px solid var(--border);background:var(--bg-key);color:var(--text);cursor:pointer;border-radius:8px;padding:8px 14px;font-size:.875rem;font-weight:560;transition:background .15s,border-color .15s,transform .1s}button:hover:not(:disabled){background:#314456;border-color:#3d5166}button:active:not(:disabled){transform:translateY(1px)}button:disabled{opacity:.45;cursor:not-allowed}button.primary{background:var(--accent);color:#061018;border-color:#0000}button.primary:hover:not(:disabled){background:#5aaff5}button.ghost{background:0 0}main{flex-direction:column;flex:1;align-items:center;gap:20px;padding:28px 20px 48px;display:flex}.legend{color:var(--text-muted);flex-wrap:wrap;gap:18px;font-size:.8rem;display:flex}.legend-item{align-items:center;gap:8px;display:inline-flex}.swatch{border:1px solid var(--border);border-radius:3px;width:14px;height:14px}.swatch.idle{background:var(--bg-key-idle)}.swatch.pressed{background:var(--pressed)}.swatch.tested{background:var(--tested)}.empty{text-align:center;border:1px dashed var(--border);background:color-mix(in srgb, var(--bg-elevated) 70%, transparent);border-radius:16px;max-width:440px;padding:48px 24px}.empty h1{margin:0 0 10px;font-size:1.45rem;font-weight:650}.empty p{color:var(--text-muted);margin:0 0 22px;font-size:.95rem;line-height:1.55}.error-banner{background:color-mix(in srgb, var(--danger) 18%, transparent);border:1px solid color-mix(in srgb, var(--danger) 45%, transparent);color:#ffb4b4;border-radius:8px;width:min(960px,100%);padding:10px 14px;font-size:.875rem}.status-dot{background:var(--text-muted);border-radius:50%;width:8px;height:8px;margin-right:6px;display:inline-block}.status-dot.on{background:var(--tested);box-shadow:0 0 0 3px color-mix(in srgb, var(--tested) 28%, transparent)}.kb-board-wrap{justify-content:center;width:100%;padding:8px 0 16px;display:flex;overflow-x:auto}.kb-board{background:color-mix(in srgb, var(--bg-elevated) 80%, #000);border:1px solid var(--border);border-radius:14px;flex-shrink:0;padding:0;position:relative;box-shadow:inset 0 1px #ffffff0f}.kb-key{background:linear-gradient(180deg, #33485c 0%, var(--bg-key-idle) 100%);color:var(--text);font-size:.68rem;font-family:var(--font-mono);-webkit-user-select:none;user-select:none;border:1px solid #1a2430;border-radius:7px;justify-content:center;align-items:center;transition:background 80ms,color 80ms,box-shadow 80ms,transform 80ms;display:flex;position:absolute}.kb-key-label{text-overflow:ellipsis;white-space:nowrap;text-align:center;opacity:.85;max-width:90%;overflow:hidden}.kb-key.is-idle{opacity:.92}.kb-key.is-tested{background:linear-gradient(180deg, #3bc98a 0%, var(--tested) 100%);color:#04160e;border-color:#1f8a58}.kb-key.is-pressed{background:linear-gradient(180deg, #ffc45c 0%, var(--pressed) 100%);color:#1a1000;box-shadow:0 0 0 2px color-mix(in srgb, var(--pressed) 45%, transparent);z-index:2;border-color:#c07a18;transform:scale(.96)}.kb-key.is-pressed .kb-key-label,.kb-key.is-tested .kb-key-label{opacity:1;font-weight:650}@media (width<=720px){.topbar{padding:12px 14px}.actions{width:100%;margin-left:0}}