diff --git a/src/index.html b/src/index.html
index 7b1f003..6f5018b 100644
--- a/src/index.html
+++ b/src/index.html
@@ -4,289 +4,7 @@
Photo Renamer
-
+
diff --git a/src/style.css b/src/style.css
new file mode 100644
index 0000000..f15b10b
--- /dev/null
+++ b/src/style.css
@@ -0,0 +1,281 @@
+@import url('https://fonts.googleapis.com/css2?family=Instrument+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap');
+
+:root {
+ --bg: #0f0f17;
+ --surface: #17172a;
+ --card: #1e1e34;
+ --border: #2e2e50;
+ --accent: #7c6af7;
+ --accent2: #e96af7;
+ --success: #6af7a0;
+ --text: #e8e8f0;
+ --muted: #6b6b8a;
+ --drag-over: #3a2e70;
+ --sel-bg: rgba(124,106,247,0.22);
+ --sel-border: #7c6af7;
+ --thumb-size: 250px;
+}
+
+* { box-sizing: border-box; margin: 0; padding: 0; }
+
+body {
+ font-family: 'Instrument Sans', -apple-system, sans-serif;
+ background: var(--bg);
+ color: var(--text);
+ height: 100vh;
+ display: flex;
+ flex-direction: column;
+ overflow: hidden;
+ user-select: none;
+ -webkit-app-region: no-drag;
+}
+
+/* ── 타이틀바 ── */
+#titlebar {
+ height: 44px;
+ background: var(--bg);
+ -webkit-app-region: drag;
+ display: flex;
+ align-items: center;
+ padding: 0 80px 0 20px;
+ border-bottom: 1px solid var(--border);
+ flex-shrink: 0;
+}
+#titlebar h1 {
+ font-size: 13px; font-weight: 600; color: var(--muted);
+ letter-spacing: .08em; text-transform: uppercase;
+}
+#titlebar .dir-path {
+ margin-left: 16px;
+ font-family: 'JetBrains Mono', monospace;
+ font-size: 11px; color: var(--muted); opacity: .7;
+ max-width: 600px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+}
+
+/* ── 툴바 ── */
+#toolbar {
+ display: flex; align-items: center; gap: 8px;
+ padding: 10px 16px;
+ background: var(--surface);
+ border-bottom: 1px solid var(--border);
+ flex-shrink: 0;
+}
+.btn {
+ display: inline-flex; align-items: center; gap: 6px;
+ padding: 7px 14px; border-radius: 8px; border: none;
+ font-family: inherit; font-size: 13px; font-weight: 600;
+ cursor: pointer; transition: all .15s;
+}
+.btn-primary { background: var(--accent); color: #fff; }
+.btn-primary:hover { background: #9180ff; transform: translateY(-1px); }
+.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
+.btn-ghost:hover { background: var(--card); color: var(--text); }
+.btn-success { background: #1a4a2e; color: var(--success); border: 1px solid #2a6a40; }
+.btn-success:hover { background: #204a34; }
+.btn-success:disabled { opacity: .4; cursor: not-allowed; transform: none; }
+.separator { width: 1px; height: 24px; background: var(--border); margin: 0 4px; }
+
+/* ── 포맷 바 ── */
+#format-bar {
+ display: flex; align-items: center; gap: 10px;
+ padding: 10px 16px;
+ background: var(--bg);
+ border-bottom: 1px solid var(--border);
+ flex-shrink: 0;
+}
+#format-bar label {
+ font-size: 12px; color: var(--muted); font-weight: 600;
+ text-transform: uppercase; letter-spacing: .06em;
+}
+#format-bar input {
+ background: var(--card); border: 1px solid var(--border);
+ color: var(--text); font-family: 'JetBrains Mono', monospace;
+ font-size: 13px; padding: 5px 10px; border-radius: 6px; outline: none;
+ transition: border-color .15s;
+}
+#format-bar input:focus { border-color: var(--accent); }
+#input-prefix { width: 160px; }
+#input-digits { width: 50px; text-align: center; }
+.format-sep { color: var(--muted); font-family: 'JetBrains Mono', monospace; font-size: 14px; }
+#preview-name {
+ font-family: 'JetBrains Mono', monospace; font-size: 13px;
+ color: var(--accent2); background: rgba(124,106,247,.1);
+ padding: 4px 12px; border-radius: 6px; border: 1px solid rgba(124,106,247,.2);
+}
+#file-count { margin-left: auto; font-size: 12px; color: var(--muted); }
+#sel-count { font-size: 12px; color: var(--accent); font-weight: 700; display: none; }
+#sel-count.visible { display: inline; }
+
+/* ── 그리드 컨테이너 ── */
+#grid-container {
+ flex: 1; overflow-y: auto; padding: 20px;
+ position: relative;
+ scrollbar-width: thin; scrollbar-color: var(--border) transparent;
+}
+#grid-container::-webkit-scrollbar { width: 6px; }
+#grid-container::-webkit-scrollbar-track { background: transparent; }
+#grid-container::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
+
+/* ── 그리드: 고정 열 폭 (--thumb-size) ── */
+#grid {
+ display: grid;
+ grid-template-columns: repeat(auto-fill, var(--thumb-size));
+ gap: 14px;
+ justify-content: start;
+}
+
+/* ── 빈 상태 ── */
+#empty-state {
+ display: flex; flex-direction: column; align-items: center;
+ justify-content: center; height: 100%; gap: 16px; color: var(--muted);
+}
+#empty-state .icon { font-size: 64px; opacity: .3; }
+#empty-state p { font-size: 15px; text-align: center; line-height: 1.6; }
+
+/* ── 카드 ── */
+.card {
+ background: var(--card);
+ border: 2px solid transparent;
+ border-radius: 12px;
+ overflow: hidden;
+ cursor: grab;
+ transition: border-color .15s, transform .15s, box-shadow .15s, background .15s;
+ position: relative;
+ width: var(--thumb-size);
+}
+.card:hover {
+ border-color: var(--border);
+ transform: translateY(-2px);
+ box-shadow: 0 8px 24px rgba(0,0,0,.4);
+}
+.card.selected {
+ border-color: var(--sel-border) !important;
+ background: var(--sel-bg);
+ box-shadow: 0 0 0 1px var(--sel-border), 0 8px 24px rgba(124,106,247,.2);
+}
+.card.dragging,
+.card.multi-dragging { opacity: .3; transform: scale(.96); cursor: grabbing; }
+.card.drag-over { border-color: var(--accent) !important; background: var(--drag-over); }
+
+/* ── 썸네일: 정사각형 + object-fit: contain ── */
+.card-thumb {
+ width: 100%;
+ aspect-ratio: 1 / 1;
+ object-fit: contain;
+ background: #08080f;
+ display: block;
+}
+.card-thumb-placeholder {
+ width: 100%;
+ aspect-ratio: 1 / 1;
+ background: #08080f;
+ display: flex; align-items: center; justify-content: center;
+ font-size: 52px; opacity: .25;
+}
+
+.card-body { padding: 8px 10px; }
+
+.card-num {
+ position: absolute; top: 8px; left: 8px;
+ background: var(--accent); color: #fff;
+ font-size: 11px; font-weight: 700;
+ font-family: 'JetBrains Mono', monospace;
+ padding: 2px 7px; border-radius: 99px; line-height: 1.6;
+ pointer-events: none; z-index: 2;
+}
+.card-check {
+ position: absolute; top: 8px; right: 8px;
+ width: 22px; height: 22px; border-radius: 50%;
+ background: var(--accent); color: #fff;
+ font-size: 13px; display: flex; align-items: center; justify-content: center;
+ opacity: 0; transition: opacity .15s;
+ pointer-events: none; z-index: 2;
+}
+.card.selected .card-check { opacity: 1; }
+
+.card-name {
+ font-size: 11px; color: var(--muted);
+ font-family: 'JetBrains Mono', monospace;
+ overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+}
+.card-new-name {
+ font-size: 11px; color: var(--accent2);
+ font-family: 'JetBrains Mono', monospace;
+ overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+ margin-top: 2px;
+}
+
+/* ── Rubber-band 선택 사각형 ── */
+#rubber-band {
+ position: fixed;
+ border: 1.5px solid var(--accent);
+ background: rgba(124,106,247,.1);
+ border-radius: 3px;
+ pointer-events: none;
+ display: none;
+ z-index: 40;
+}
+
+/* ── 다중 드래그 고스트 배지 ── */
+#drag-ghost {
+ position: fixed;
+ pointer-events: none;
+ z-index: 9999;
+ display: none;
+ background: var(--accent);
+ color: #fff;
+ font-size: 13px; font-weight: 700;
+ font-family: 'Instrument Sans', sans-serif;
+ padding: 6px 16px;
+ border-radius: 99px;
+ box-shadow: 0 4px 20px rgba(0,0,0,.5);
+}
+
+/* ── 상태바 ── */
+#statusbar {
+ height: 28px; background: var(--bg);
+ border-top: 1px solid var(--border);
+ display: flex; align-items: center; padding: 0 16px; gap: 12px; flex-shrink: 0;
+}
+#statusbar span { font-size: 11px; color: var(--muted); }
+.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); }
+.status-dot.ready { background: var(--success); }
+
+/* ── 핀치 크기 힌트 ── */
+#thumb-size-hint {
+ position: fixed; bottom: 40px; right: 24px;
+ background: rgba(124,106,247,.9);
+ color: #fff; font-size: 12px; font-weight: 700;
+ font-family: 'JetBrains Mono', monospace;
+ padding: 5px 12px; border-radius: 8px;
+ opacity: 0; transition: opacity .2s;
+ pointer-events: none; z-index: 500;
+}
+#thumb-size-hint.show { opacity: 1; }
+
+/* ── 로딩 ── */
+#loading {
+ display: none; position: fixed; inset: 0;
+ background: rgba(15,15,23,.85); backdrop-filter: blur(4px);
+ z-index: 100; align-items: center; justify-content: center;
+ flex-direction: column; gap: 16px;
+}
+#loading.show { display: flex; }
+.spinner {
+ width: 40px; height: 40px;
+ border: 3px solid var(--border); border-top-color: var(--accent);
+ border-radius: 50%; animation: spin .8s linear infinite;
+}
+@keyframes spin { to { transform: rotate(360deg); } }
+#loading p { color: var(--text); font-size: 14px; }
+
+/* ── 토스트 ── */
+#toast {
+ position: fixed; bottom: 40px; left: 50%;
+ transform: translateX(-50%) translateY(20px);
+ background: var(--success); color: #0a2a1a;
+ font-weight: 700; font-size: 14px;
+ padding: 12px 24px; border-radius: 12px;
+ opacity: 0; transition: all .3s; pointer-events: none; z-index: 200;
+}
+#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
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