.dt {
    display: grid;
    grid-template-areas: "top top top" "left center right" "bottom bottom bottom" "footer footer footer";
    grid-template-columns: 200px 1fr 200px;
    gap: 16px;
    padding: 20px;
    min-height: 100vh;
    box-sizing: border-box;
}
.dt_top { grid-area: top; }
.dt_left { grid-area: left; }
.dt_center { grid-area: center; }
.dt_right { grid-area: right; }
.dt_bottom { grid-area: bottom; }
.dt_footer { grid-area: footer; }
.dt_policy { display: none; }
.dt_toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 24px;
    border-radius: 4px;
    display: none;
    z-index: 99999;
    background: #333;
    color: #fff;
    font-family: sans-serif;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    min-width: 200px;
}
.dt_toast .success { color: #4ade80; margin-bottom: 4px; }
.dt_toast .error { color: #f87171; margin-bottom: 4px; }
.dt_toast .info { color: #60a5fa; margin-bottom: 4px; }
body { margin: 0; font-family: system-ui, sans-serif; }
#dt_benchmark { position: fixed; bottom: 10px; right: 10px; font-size: 12px; color: #888; background: rgba(255,255,255,0.8); padding: 4px 8px; border-radius: 4px; z-index: 9999; }