/* === JKY Drive Theme === */
/* 色票來源：
   #37353E (深灰紫)
   #44444E (石墨灰)
   #715A5A (古銅玫瑰)
   #D3DAD9 (霧白灰)
*/

:root {
  --color-bg-dark: #37353E;
  --color-surface: #44444E;
  --color-accent: #715A5A;
  --color-text: #D3DAD9;
  --color-text-dim: rgba(211,218,217,0.7);
  --color-border: rgba(255,255,255,0.08);
  --radius: 12px;
  --transition: 0.25s ease;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--color-bg-dark);
  color: var(--color-text);
  font-family: "Noto Sans TC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  letter-spacing: 0.2px;
  user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
}

/* === Layout === */
.app {
  display: grid;
  grid-template-columns: 220px 1fr;
  grid-template-rows: 60px 1fr;
  grid-template-areas:
    "sidebar header"
    "sidebar main";
  height: 100vh;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  grid-area: sidebar;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: 12px;
}

.sidebar h2 {
  font-size: 18px;
  font-weight: 600;
  margin: 10px 0 20px;
  text-align: center;
  color: var(--color-accent);
}

.sidebar button {
  background: none;
  border: none;
  color: var(--color-text);
  text-align: left;
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition);
}

.sidebar button:hover {
  background: rgba(255,255,255,0.08);
}

/* Header */
.header {
  grid-area: header;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--color-border);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header h1 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.header .user {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-dim);
}

/* Main content */
.main {
  grid-area: main;
  padding: 20px;
  background: var(--color-bg-dark);
  overflow-y: auto;
}

/* Toolbar */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.toolbar button {
  background: var(--color-accent);
  border: none;
  color: var(--color-text);
  padding: 8px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: filter var(--transition);
}

.toolbar button:hover {
  filter: brightness(1.15);
}

/* File grid */
.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.file-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
}

.file-card:hover {
  transform: translateY(-3px);
  background: rgba(255,255,255,0.05);
}

.file-card img {
  width: 48px;
  opacity: 0.85;
}

.file-name {
  margin-top: 8px;
  font-size: 13px;
  color: var(--color-text);
  word-break: break-all;
}