:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --line: #2a2f3a;
  --text: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #c9a227;
  --accent-soft: #3a3417;
  --green: #3fb950;
  --red: #f85149;
  --radius: 10px;
  font-synthesis: none;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
}

/* ---- Topbar ---- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  background: var(--accent);
  color: #1a1500;
  font-weight: 800;
  letter-spacing: 0.5px;
  padding: 4px 8px;
  border-radius: 6px;
}
.brand-name { font-weight: 600; }

/* ---- Layout ---- */
.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 16px;
  padding: 16px;
  align-items: start;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
.panel h2 { margin: 0 0 12px; font-size: 15px; }

/* ---- Tabs ---- */
.tabs { display: inline-flex; gap: 4px; background: var(--panel-2); padding: 4px; border-radius: 8px; }
.tab {
  background: transparent;
  color: var(--muted);
  border: 0;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}
.tab.is-active { background: var(--accent); color: #1a1500; }
.tab:not(.is-active):hover { color: var(--text); }

/* ---- Library ---- */
.upload-row { display: flex; gap: 8px; margin: 14px 0 6px; }
.file-label {
  flex: 1;
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--muted);
  cursor: pointer;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.file-label:hover { border-color: var(--accent); color: var(--text); }
.hint { color: var(--muted); font-size: 12px; margin: 4px 0 12px; }

.lib-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  max-height: calc(100vh - 320px);
  overflow-y: auto;
  padding-right: 4px;
}
.lib-card {
  border: 2px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.lib-card.is-selected { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.lib-card .thumb {
  aspect-ratio: 1 / 1;
  background: #fff center / contain no-repeat;
  background-color: #ffffff;
}
.lib-card .meta { padding: 6px 8px; display: flex; align-items: center; gap: 6px; }
.lib-card .name {
  flex: 1; font-size: 12px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
}
.icon-btn {
  background: transparent; border: 0; color: var(--muted); cursor: pointer;
  font-size: 13px; padding: 2px 4px; border-radius: 4px;
}
.icon-btn:hover { color: var(--text); background: var(--panel); }
.icon-btn.danger:hover { color: var(--red); }
.empty-note { color: var(--muted); font-size: 13px; text-align: center; padding: 24px 0; }

/* ---- Sheet ---- */
.sheet-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.tally { color: var(--muted); font-weight: 600; }
.sheet-actions { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.spacer { flex: 1; }
.selected-chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--panel-2); border: 1px solid var(--line);
  padding: 6px 12px; border-radius: 20px; font-size: 13px; color: var(--muted);
}
.selected-chip .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.selected-chip.has-sel { color: var(--text); }
.selected-chip.has-sel .dot { background: var(--accent); }

/* Buttons */
.primary-btn {
  background: var(--accent); color: #1a1500; border: 0; font-weight: 700;
  padding: 8px 16px; border-radius: 8px; cursor: pointer;
}
.primary-btn:hover { filter: brightness(1.08); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.secondary-btn {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--line);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-weight: 600;
}
.secondary-btn:hover { border-color: var(--accent); }
.ghost-btn {
  background: transparent; color: var(--muted); border: 1px solid var(--line);
  padding: 6px 12px; border-radius: 8px; cursor: pointer;
}
.ghost-btn:hover { color: var(--text); border-color: var(--accent); }

/* Slot grid */
.slot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.slot {
  position: relative;
  border: 2px dashed var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  overflow: hidden;
}
.slot:hover { border-color: var(--accent); }
.slot .slot-num { position: absolute; top: 4px; left: 6px; font-size: 10px; opacity: 0.5; }
.slot.filled { border-style: solid; border-color: var(--accent); }
.slot.filled img { width: 100%; height: 100%; object-fit: fill; display: block; background: #fff; }

/* ---- Settings drawer ---- */
.overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 40;
}
.settings-drawer {
  position: fixed; top: 0; right: 0; bottom: 0; width: 420px; max-width: 92vw;
  background: var(--panel); border-left: 1px solid var(--line);
  z-index: 41; padding: 20px; overflow-y: auto;
}
.drawer-head { display: flex; align-items: center; justify-content: space-between; }
.template-list { display: flex; flex-direction: column; gap: 12px; margin-top: 12px; }
.tpl-card { border: 1px solid var(--line); border-radius: 8px; padding: 14px; background: var(--panel-2); }
.tpl-card .tpl-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.tpl-card .tpl-name { font-weight: 700; }
.tpl-card .tpl-file { color: var(--muted); font-size: 12px; margin: 4px 0 10px; word-break: break-all; }
.badge { font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 12px; }
.badge.ok { background: rgba(63,185,80,0.15); color: var(--green); }
.badge.missing { background: rgba(248,81,73,0.15); color: var(--red); }
.tpl-upload { display: flex; gap: 8px; }
.tpl-upload .file-label { padding: 6px 10px; font-size: 12px; }

/* ---- Toast ---- */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  padding: 10px 18px; border-radius: 8px; z-index: 50; box-shadow: 0 6px 24px rgba(0,0,0,0.4);
}
.toast.ok { border-color: var(--green); }
.toast.err { border-color: var(--red); }