:root {
  --canvas: #F7F8FA;
  --sidebar-bg: #F1F2F5;
  --surface: #FFFFFF;
  --line: #D7DBE2;
  --text: #1B2430;
  --text-muted: #6B7484;
  --accent: #2F5DA8;
  --accent-dark: #234a87;
  --accent-tint: #E7EEF9;
  --live: #2F8F5B;
  --planning: #8A93A3;
  --font-display: "IBM Plex Sans KR", "Pretendard", sans-serif;
  --font-body: "Pretendard", "IBM Plex Sans KR", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: #DADEE5;
  color: var(--text);
  font-family: var(--font-body);
}

.explorer {
  max-width: 1080px;
  margin: 24px auto;
  min-height: calc(100vh - 48px);
  background: var(--canvas);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 24px rgba(20, 30, 50, 0.08);
}

/* Address bar */
.addressbar {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.breadcrumb {
  font-family: var(--font-display);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.crumb { color: var(--text-muted); text-decoration: none; }
.crumb.current { color: var(--text); font-weight: 700; }
a.crumb:hover { color: var(--accent); }
.sep { color: var(--text-muted); }

.search-wrap input {
  font-family: var(--font-body);
  font-size: 13px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 12px;
  width: 260px;
  background: var(--canvas);
  color: var(--text);
}
.search-wrap input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--surface);
}

/* Toolbar */
.toolbar {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.tool-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 12.5px;
  color: var(--text);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 5px;
  padding: 6px 10px;
  cursor: pointer;
}
.tool-btn:hover { background: var(--accent-tint); border-color: var(--line); }
.tool-btn svg { color: var(--text-muted); }

.toolbar-spacer { flex: 1; }

.toolbar-note {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

/* Body: sidebar + list */
.explorer-body {
  display: flex;
  flex: 1;
  min-height: 0;
}

.sidebar {
  width: 190px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--line);
  padding: 14px 10px;
  flex-shrink: 0;
}

.side-section { margin-bottom: 20px; }

.side-title {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0 6px 6px;
}

.side-item {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--text);
  background: transparent;
  border: none;
  border-radius: 5px;
  padding: 7px 8px;
  cursor: pointer;
}
.side-item:hover { background: rgba(0,0,0,0.04); }
.side-item.active {
  background: var(--accent-tint);
  color: var(--accent-dark);
  font-weight: 600;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}
.dot.live { background: var(--live); }
.dot.planning { background: var(--planning); }

.ad-slot-vert {
  border: 1px dashed var(--line);
  border-radius: 5px;
  padding: 20px 8px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* List */
.listpane {
  flex: 1;
  min-width: 0;
  background: var(--canvas);
  overflow-x: auto;
}

.list-head, .file-row {
  display: grid;
  gap: 12px;
  align-items: center;
  padding: 10px 16px;
}

.list-head {
  padding-top: 8px;
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--line);
}

.file-row { border-bottom: 1px solid var(--line); }
.file-row:hover { background: var(--surface); }

/* Column layout variants */
.cols-root { grid-template-columns: 1fr 110px 90px 90px; min-width: 560px; }
.cols-arcade { grid-template-columns: 1fr 150px 110px 100px 84px; min-width: 640px; }

.list-head.cols-root, .list-head.cols-arcade { min-width: unset; }
.file-list.cols-root, .file-list.cols-arcade { min-width: unset; }

.col-name { display: flex; align-items: center; gap: 10px; }

.file-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-tint);
}

.file-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.new-badge {
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 700;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  padding: 1px 4px;
}

.file-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
  line-height: 1.4;
}

.col-type, .col-date, .col-items {
  font-size: 12.5px;
  color: var(--text-muted);
}
.col-date { font-family: var(--font-mono); font-size: 12px; }
.col-items { font-family: var(--font-mono); font-size: 12px; }

.col-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
}

.play-btn {
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 5px;
  padding: 6px 10px;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  display: inline-block;
}
.play-btn:hover { background: var(--accent-dark); }
.play-btn.disabled {
  background: #DCE0E6;
  color: var(--text-muted);
  cursor: not-allowed;
  pointer-events: none;
}

.empty-state {
  padding: 40px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* Status bar */
.statusbar {
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding: 8px 16px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

/* Placeholder pages (SaaS / Seminar / Shop) */
.placeholder-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 60px 24px;
  text-align: center;
}
.placeholder-emoji { font-size: 48px; }
.placeholder-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
}
.placeholder-desc {
  color: var(--text-muted);
  font-size: 13.5px;
  max-width: 420px;
  line-height: 1.6;
}
.placeholder-stage {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 3px 10px;
  margin-top: 6px;
}

@media (max-width: 640px) {
  .sidebar { display: none; }
  .search-wrap input { width: 160px; }
  .toolbar-note { display: none; }
  .statusbar-note { display: none; }
  .cols-root { grid-template-columns: 1fr 80px 70px; }
  .cols-arcade { grid-template-columns: 1fr 90px 84px; }
  .col-type.hide-sm, .col-date.hide-sm { display: none; }
}