:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --radius: 12px;
  --sidebar-w: 250px;
  --topbar-h: 56px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: inherit; }

/* ---------- 로그인 ---------- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; }
.login-card {
  width: 100%; max-width: 360px; background: var(--panel);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 28px; text-align: center;
}
.login-card h1 { font-size: 20px; margin: 0 0 4px; }
.login-card p { color: var(--muted); font-size: 13px; margin: 0 0 24px; }
.login-card input {
  width: 100%; padding: 12px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); font-size: 15px; margin-bottom: 12px;
}
.login-card input:focus { outline: 2px solid var(--accent); border-color: transparent; }
.login-card button {
  width: 100%; padding: 12px; border: none; border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 15px; font-weight: 600; cursor: pointer;
}
.login-card button:hover { background: var(--accent-hover); }
.login-error { color: var(--danger); font-size: 13px; margin-bottom: 12px; min-height: 18px; }

/* ---------- 상단바 ---------- */
.topbar {
  height: var(--topbar-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px; border-bottom: 1px solid var(--border); background: var(--panel);
  position: sticky; top: 0; z-index: 20;
}
.topbar h1 { font-size: 17px; margin: 0; }
#homeBtn { cursor: pointer; user-select: none; }
#homeBtn:hover { opacity: 0.85; }
.topbar .logout {
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  padding: 7px 14px; border-radius: 8px; font-size: 13px; cursor: pointer;
}
.topbar .logout:hover { color: var(--text); border-color: var(--muted); }

/* ---------- 버튼 ---------- */
.btn {
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  font-size: 13px; padding: 8px 14px; border-radius: 8px; cursor: pointer; white-space: nowrap;
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: transparent; color: #fff; font-weight: 600; }
.btn.primary:hover { background: var(--accent-hover); }

/* ---------- 2단 레이아웃 ---------- */
.layout { display: flex; min-height: calc(100vh - var(--topbar-h)); }

/* 사이드바 (폴더 트리) */
.sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  border-right: 1px solid var(--border); background: var(--panel);
  padding: 12px 8px; overflow-y: auto;
  position: sticky; top: var(--topbar-h); align-self: flex-start;
  max-height: calc(100vh - var(--topbar-h));
}
.sidebar-head {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em;
  padding: 4px 8px 10px;
}
.tree-refresh {
  background: transparent; border: none; color: var(--muted); cursor: pointer; font-size: 14px;
}
.tree-refresh:hover { color: var(--text); }
.tree { font-size: 14px; }
.tree-row {
  display: flex; align-items: center; gap: 4px;
  padding: 6px 8px; border-radius: 7px; cursor: pointer; user-select: none;
}
.tree-row:hover { background: var(--panel-2); }
.tree-row.active { background: rgba(59,130,246,0.18); color: #fff; }
.tree-toggle { width: 14px; flex-shrink: 0; color: var(--muted); text-align: center; font-size: 11px; }
.tree-icon { flex-shrink: 0; }
.tree-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 메인 */
.main { flex: 1; min-width: 0; padding: 20px 24px; }

.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; font-size: 14px; min-width: 0; }
.breadcrumb .crumb { color: var(--muted); text-decoration: none; padding: 2px 4px; border-radius: 6px; }
.breadcrumb a.crumb:hover { color: var(--text); background: var(--panel-2); }
.breadcrumb .crumb.current { color: var(--text); font-weight: 600; }
.breadcrumb .crumb-sep { color: var(--muted); }
.toolbar-actions { display: flex; gap: 8px; flex-shrink: 0; }

.dropzone-slim {
  border: 1.5px dashed var(--border); border-radius: 10px;
  padding: 14px; text-align: center; color: var(--muted); font-size: 13px;
  transition: border-color .15s, background .15s; margin-bottom: 14px;
}
.dropzone-slim.drag { border-color: var(--accent); background: var(--panel-2); color: var(--text); }

.upload-gauge {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px; margin-bottom: 12px;
}
.gauge-info { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 8px; }
.gauge-info #gaugeLabel { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gauge-info #gaugePct { color: var(--accent); font-weight: 700; font-variant-numeric: tabular-nums; flex-shrink: 0; margin-left: 12px; }
.progress { height: 8px; background: var(--panel-2); border-radius: 999px; overflow: hidden; }
.progress .bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), #60a5fa); transition: width .15s ease; }
.msg { font-size: 13px; margin-bottom: 10px; min-height: 18px; }
.msg.err { color: var(--danger); }
.msg.ok { color: #4ade80; }

/* ---------- 콘텐츠 목록 (표 형태) ---------- */
.content { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--panel); }
.list-header, .row {
  display: grid;
  grid-template-columns: 1fr 170px 90px auto;
  align-items: center; gap: 8px;
}
.list-header {
  padding: 10px 16px; font-size: 12px; color: var(--muted);
  border-bottom: 1px solid var(--border); background: var(--panel-2);
}
.row { padding: 10px 16px; border-bottom: 1px solid var(--border); }
.row:last-child { border-bottom: none; }
.row:hover { background: var(--panel-2); }
.col-name { display: flex; align-items: center; gap: 10px; min-width: 0; cursor: default; }
.row.folder .col-name { cursor: pointer; }
.r-icon { font-size: 18px; flex-shrink: 0; }
.r-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }
.col-date { font-size: 12px; color: var(--muted); }
.col-size { font-size: 12px; color: var(--muted); }
.col-act { display: flex; gap: 4px; justify-content: flex-end; }
.iconbtn {
  border: 1px solid transparent; background: transparent; color: var(--muted);
  font-size: 14px; width: 30px; height: 30px; border-radius: 7px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; text-decoration: none;
}
.iconbtn:hover { background: var(--panel); border-color: var(--border); color: var(--text); }
.iconbtn.del:hover { background: var(--danger); border-color: var(--danger); color: #fff; }

.empty { text-align: center; color: var(--muted); padding: 40px 0; font-size: 14px; }

/* 드래그 이동 상태 */
.row[draggable="true"] { cursor: grab; }
.row.dragging { opacity: 0.45; }
.row.folder.drop-target { background: rgba(59,130,246,0.22); outline: 2px solid var(--accent); outline-offset: -2px; }
.tree-row.drop-target { background: rgba(59,130,246,0.28); outline: 1px solid var(--accent); outline-offset: -1px; }

/* ---------- 모달 ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center; padding: 20px; z-index: 50;
}
.modal { width: 100%; max-width: 380px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.modal h3 { margin: 0 0 6px; font-size: 16px; }
.modal-sub { color: var(--muted); font-size: 13px; margin: 0 0 16px; }
.modal-select {
  width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); font-size: 14px; margin-bottom: 18px;
}
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; }

/* 정보 목록 */
.info-list { margin: 0 0 18px; display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; }
.info-list dt { color: var(--muted); font-size: 13px; }
.info-list dd { margin: 0; font-size: 13px; word-break: break-all; }

#confirmText { white-space: pre-line; line-height: 1.6; }

/* ---------- 전체화면 드롭 오버레이 ---------- */
.drop-overlay {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(15, 23, 42, 0.78);
  display: none; align-items: center; justify-content: center;
  pointer-events: none; padding: 40px;
}
.drop-overlay.show { display: flex; }
.drop-overlay-inner {
  border: 3px dashed var(--accent); border-radius: 18px;
  padding: 48px 72px; font-size: 20px; font-weight: 600; color: var(--text);
  background: rgba(30, 41, 59, 0.92); text-align: center;
}

/* ---------- 우클릭 컨텍스트 메뉴 ---------- */
.ctx-menu {
  position: fixed; z-index: 100; min-width: 160px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 6px; box-shadow: 0 10px 30px rgba(0,0,0,0.45);
}
.ctx-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: 7px; font-size: 13px; cursor: pointer;
}
.ctx-item:hover { background: var(--panel-2); }
.ctx-item.danger { color: var(--danger); }
.ctx-item.danger:hover { background: var(--danger); color: #fff; }
.ctx-ic { width: 16px; text-align: center; flex-shrink: 0; }
.ctx-sep { height: 1px; background: var(--border); margin: 5px 4px; }

/* ---------- 반응형 ---------- */
@media (max-width: 720px) {
  .layout { flex-direction: column; }
  .sidebar {
    width: 100%; max-height: 200px; position: static;
    border-right: none; border-bottom: 1px solid var(--border);
  }
  .list-header, .row { grid-template-columns: 1fr 70px auto; }
  .col-date { display: none; }
  .iconbtn { width: 28px; height: 28px; font-size: 13px; }
}