Lab 설정 변경 및 유틸 추가

src/pages/effect-lab/SwordStream.css

@@ -0,0 +1,82 @@
+.sword-stream {
+    position: relative;
+    width: 100%;
+    height: 100%;
+    min-height: calc(100vh - 80px);
+    overflow: hidden;
+    background-color: #050505;
+    border-radius: 20px;
+    border: 1px solid var(--line);
+}
+
+.sword-stream canvas {
+    display: block;
+    outline: none;
+}
+
+.sword-stream__overlay {
+    position: absolute;
+    top: 20px;
+    left: 20px;
+    color: rgba(255, 255, 255, 0.7);
+    pointer-events: none;
+    z-index: 10;
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+
+.sword-stream__back {
+    pointer-events: all;
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    font-size: 12px;
+    font-weight: 600;
+    color: rgba(68, 170, 221, 0.7);
+    text-decoration: none;
+    padding: 5px 10px;
+    border: 1px solid rgba(68, 170, 221, 0.2);
+    border-radius: 6px;
+    background: rgba(68, 170, 221, 0.06);
+    transition: color 0.2s, border-color 0.2s, background 0.2s;
+    width: fit-content;
+}
+
+.sword-stream__back:hover {
+    color: #44aadd;
+    border-color: rgba(68, 170, 221, 0.5);
+    background: rgba(68, 170, 221, 0.12);
+}
+
+.sword-stream__overlay h2 {
+    margin: 0;
+    font-family: var(--font-display);
+    font-size: 28px;
+    color: var(--text);
+    text-shadow: 0 0 20px rgba(68, 170, 221, 0.5);
+}
+
+.sword-stream__mode {
+    display: inline-block;
+    background: rgba(68, 170, 221, 0.1);
+    border: 1px solid rgba(68, 170, 221, 0.3);
+    padding: 6px 12px;
+    border-radius: 99px;
+    font-size: 12px;
+    color: #44aadd;
+    font-weight: 600;
+    width: fit-content;
+}
+
+.sword-stream__mode span {
+    color: #fff;
+}
+
+.sword-stream__overlay p {
+    margin: 0;
+    font-size: 14px;
+    color: var(--muted);
+    max-width: 400px;
+    line-height: 1.5;
+}