:root{
  --bg:#f4f5f7; --surface:#fff; --border:#e3e6ec; --border-strong:#cfd4dd;
  --text:#1c2230; --sub:#5b6472; --muted:#8b93a3;
  --primary:#2f6df6; --primary-dark:#1f56cf; --primary-soft:rgba(47,109,246,.09);
  --danger:#d6453c; --radius:8px; --shadow:0 1px 3px rgba(20,26,48,.08); --shadow-lg:0 12px 40px rgba(20,26,48,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Pretendard Variable','Pretendard',system-ui,-apple-system,sans-serif;font-size:14px;color:var(--text);background:var(--bg);min-height:100vh}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}

/* topbar */
.topbar{height:60px;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:10}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:34px;height:34px;border-radius:var(--radius);background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center;letter-spacing:.5px}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:15px}
.brand-text small{font-size:12px;color:var(--muted)}

/* buttons */
.btn{padding:8px 14px;border-radius:var(--radius);font-size:14px;font-weight:600;border:1px solid var(--border-strong);color:var(--sub);background:var(--surface);transition:.15s;display:inline-flex;align-items:center;gap:6px}
.btn:hover{border-color:var(--primary);color:var(--primary)}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff}
.btn-primary:disabled{opacity:.5;cursor:not-allowed}
.btn-sm{padding:5px 10px;font-size:13px}
.btn-xs{padding:3px 9px;font-size:12px}
.icon-btn{width:32px;height:32px;border-radius:var(--radius);display:inline-flex;align-items:center;justify-content:center;color:var(--muted)}
.icon-btn:hover{background:var(--bg);color:var(--text)}
.icon-btn.danger:hover{background:rgba(214,69,60,.1);color:var(--danger)}

/* layout */
.wrap{max-width:920px;margin:0 auto;padding:32px 24px 60px}
.list-head h1{font-size:22px;font-weight:800;display:flex;align-items:center;gap:10px}
.count{font-size:13px;font-weight:700;color:var(--primary);background:var(--primary-soft);border-radius:20px;padding:2px 10px}
.sub{color:var(--sub);margin-top:6px;font-size:14px}

/* version list */
.version-list{margin-top:22px;display:flex;flex-direction:column;gap:10px}
.ver-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px;transition:.15s}
.ver-card:hover{border-color:var(--border-strong);box-shadow:var(--shadow)}
.ver-title{display:flex;align-items:center;gap:8px}
.ver-name{font-size:15px;font-weight:700}
.ver-seq{font-size:12px;font-weight:700;color:var(--muted)}
.ver-note{color:var(--sub);margin-top:3px;font-size:14px}
.ver-meta{color:var(--muted);font-size:13px;margin-top:6px;display:flex;align-items:center;gap:6px}
.ver-meta .dot{opacity:.6}
.ver-actions{display:flex;align-items:center;gap:6px;flex-shrink:0}
.empty{background:var(--surface);border:1px dashed var(--border-strong);border-radius:var(--radius);padding:48px 20px;text-align:center;color:var(--muted);line-height:1.7}
.empty.error{color:var(--danger);border-color:var(--danger)}

/* modal */
.modal{position:fixed;inset:0;background:rgba(20,26,48,.42);display:flex;align-items:center;justify-content:center;padding:20px;z-index:100}
.modal.hidden{display:none}
.modal-box{background:var(--surface);border-radius:12px;box-shadow:var(--shadow-lg);width:100%;max-width:520px;max-height:88vh;overflow:auto;padding:22px 24px}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.modal-head h2{font-size:18px;font-weight:800}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field span{font-size:13px;font-weight:600;color:var(--sub)}
.field input{padding:10px 12px;border:1px solid var(--border-strong);border-radius:var(--radius);font-size:14px;color:var(--text);outline:none}
.field input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}

/* dropzone */
.dropzone{border:2px dashed var(--border-strong);border-radius:var(--radius);padding:26px;text-align:center;cursor:pointer;transition:.15s;background:var(--bg)}
.dropzone:hover,.dropzone.over{border-color:var(--primary);background:var(--primary-soft)}
.dz-icon{font-size:24px;color:var(--primary);margin-bottom:6px}
.dz-inner p{font-size:14px}
.dz-hint{color:var(--muted);font-size:13px;margin-top:2px}
.file-chips{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.chip{background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:5px 8px 5px 10px;font-size:13px;display:flex;align-items:center;gap:6px}
.chip-size{color:var(--muted);font-size:12px}
.chip-x{color:var(--muted);font-size:12px;line-height:1}
.chip-x:hover{color:var(--danger)}
.modal-foot{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}

/* detail */
.detail-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.detail-meta .note{color:var(--sub);font-size:14px}
.detail-files{display:flex;flex-direction:column;gap:2px}
.file-row{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:6px}
.file-row:hover{background:var(--bg)}
.file-name{flex:1;font-size:14px;word-break:break-all}
.file-size{color:var(--muted);font-size:12px;flex-shrink:0}

/* toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--text);color:#fff;padding:11px 18px;border-radius:var(--radius);font-size:14px;box-shadow:var(--shadow-lg);z-index:200}
.toast.hidden{display:none}
.toast.error{background:var(--danger)}

/* view-screen emphasis */
.no-view{font-size:12px;color:var(--muted);padding:5px 10px}
.detail-actions{display:flex;gap:8px}
.file-row.is-entry{background:var(--primary-soft)}
.entry-tag{display:inline-block;margin-left:6px;font-size:11px;font-weight:700;color:#fff;background:var(--primary);border-radius:4px;padding:1px 6px;vertical-align:middle}