:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --panel-alt: #f0f2f5;
  --text: #1e1f24;
  --muted: #5d6470;
  --border: #d6dbe4;
  --accent: #2b69ff;
  --row-hover: #e7eefc;
  --shadow: 0 10px 24px rgba(20, 24, 34, 0.08);
}

[data-theme="dark"] {
  --bg: #0f1116;
  --panel: #141821;
  --panel-alt: #1c2330;
  --text: #f2f4f8;
  --muted: #9aa4b2;
  --border: #2c3443;
  --accent: #6ea6ff;
  --row-hover: #1d2c46;
  --shadow: 0 12px 24px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
  font-family: "Segoe UI", "Inter", sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-button {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-alt);
  color: var(--text);
  font-size: 16px;
}

.icon-button:hover,
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.address-bar {
  min-width: 280px;
  border: 1px solid var(--border);
  background: var(--panel-alt);
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--muted);
}

.search-input {
  width: 220px;
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-alt);
  color: var(--text);
}

.theme-toggle {
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-alt);
  color: var(--text);
  font-weight: 600;
}

.content {
  display: flex;
  flex: 1;
  padding: 16px;
  gap: 16px;
}

.sidebar {
  width: 260px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.sidebar-title {
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--muted);
  text-transform: uppercase;
  font-size: 12px;
}

.tree ul {
  list-style: none;
  margin: 4px 0 4px 12px;
  padding: 0;
}

.tree-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 6px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text);
}

.tree-item:hover {
  background: var(--row-hover);
}

.tree-item.active {
  background: var(--accent);
  color: #fff;
}

.caret {
  width: 10px;
  display: inline-block;
  transform: rotate(90deg);
  transition: transform 0.15s ease;
  color: var(--muted);
}

li.collapsed > .tree-item .caret {
  transform: rotate(0deg);
}

li.collapsed > ul {
  display: none;
}

.folder-icon,
.file-icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  font-size: 10px;
  color: #fff;
}

.folder-icon {
  background: #f7b733;
}

.file-icon {
  background: #4a7aff;
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 16px;
  gap: 12px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.crumb {
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}

.crumb.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.list-header,
.row {
  display: grid;
  grid-template-columns: 1.6fr 1fr 0.8fr 0.6fr;
  gap: 12px;
  align-items: center;
}

.list-header {
  font-size: 12px;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.row {
  padding: 8px 6px;
  border-radius: 8px;
  cursor: pointer;
}

.row:hover {
  background: var(--row-hover);
}

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

.status-bar {
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
  padding-top: 8px;
}

@media (max-width: 1000px) {
  .content {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }
}