:root{
  --bg:#f6f8fb; --card:#ffffff; --line:#e6eaf3; --ink:#1b2134; --muted:#7a88a5;
  --accent:#4b7cff; --accent2:#22c55e; --warn:#f59e0b; --danger:#ef4444;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Noto Sans KR,sans-serif}
.wrap{max-width:1180px;margin:28px auto;padding:0 16px}

/* header */
header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.brand{display:flex;align-items:center;gap:12px}
.logo{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#7ca9ff,#97d9ff);box-shadow:0 6px 22px rgba(123,160,255,.35)}
h1{margin:0;font-size:30px;font-weight:800}
.kSub{margin-left:auto;font-size:12px;color:var(--muted);text-align:right;min-width:220px}
.toolbar{display:flex;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:10px 14px;cursor:pointer;font-weight:700;border:1px solid var(--line);background:#fff;color:var(--ink);transition:.15s}
.btn:hover{box-shadow:0 4px 14px rgba(0,0,0,.06)}
.btn.primary{background:var(--accent);color:#fff;border:none}
.btn.green{background:var(--accent2);color:#fff;border:none}
.btn.equal{min-width:220px}

/* tabs */
.tabs{display:flex;gap:8px;margin:6px 0 12px}
.tab{cursor:pointer;padding:10px 14px;border-radius:10px;background:#fff;border:1px solid var(--line);color:var(--muted);font-weight:700}
.tab.active{color:#fff;background:linear-gradient(135deg,#5c7cfa,#6ac2ff);border:none}

.panel{display:none;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:0 10px 26px rgba(0,0,0,.06)}
.panel.active{display:block}

label{font-size:12px;color:var(--muted);display:flex;align-items:center;justify-content:space-between;gap:8px;margin:8px 0 6px}
.counter{font-variant-numeric:tabular-nums;color:var(--muted)}
textarea{width:100%;background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:10px 12px;outline:none;min-height:120px;resize:vertical;line-height:1.6}
input{background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:8px 10px}
.small{font-size:12px;color:var(--muted)}
.badge{font-size:11px;padding:2px 8px;border-radius:999px;border:1px solid var(--line);background:#fff}

/* grids & cards */
.section-grid{display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:980px){.section-grid{grid-template-columns:repeat(2,1fr)}}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}

.pill{font-size:11px;color:var(--muted);padding:3px 8px;background:#f7f8fc;border:1px solid var(--line);border-radius:999px}

/* audio UI */
.aud-head{font-weight:800;margin:8px 0}
.aud-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.aud-btn{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 10px;cursor:pointer;font-weight:700}
.time{font-variant-numeric:tabular-nums}

/* seek bar (clickable) */
.seek-wrap{display:flex;align-items:center;gap:8px;min-width:220px}
.seek{appearance:none;width:220px;height:6px;border-radius:4px;background:#e6ebf6;outline:none}
.seek::-webkit-slider-thumb{appearance:none;width:14px;height:14px;border-radius:50%;background:var(--accent);cursor:pointer}

/* progress */
progress{height:8px;border:none;border-radius:6px;overflow:hidden;background:#e6ebf6}
progress::-webkit-progress-bar{background:#e6ebf6}
progress::-webkit-progress-value{background:linear-gradient(90deg,#5c7cfa,#6ac2ff)}
progress::-moz-progress-bar{background:linear-gradient(90deg,#5c7cfa,#6ac2ff)}

/* ===== 선택 합치기 리스트 ===== */
.merge-list{display:flex;flex-direction:column;gap:8px;margin-top:8px}
.merge-item{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:#fff}
.merge-left{display:flex;align-items:center;gap:10px}
.merge-name{font-weight:800}
.merge-file{font-size:12px;color:var(--muted)}
.merge-item input[type="checkbox"]{width:16px;height:16px;accent-color:var(--accent);cursor:pointer}