:root {
  --bg:                #1a1a1a;
  --bg-secondary:      #202020;
  --surface:           #252525;
  --surface-alt:       #2c2c2c;
  --border:            #3a3a3a;
  --border-hover:      #555;
  --text:              #ddd;
  --text-muted:        #888;
  --text-dim:          #555;
  --accent:            #5a9a5a;
  --blue:              #3a6a9a;
  --code-bg:           #0d0d0d;
  --code-text:         #4fc04f;
  --code-border:       #1e1e1e;
  --tag-bg:            #1e3a1e;
  --tag-border:        #3a6a3a;
  --tag-text:          #7acc7a;
  --tag-bg-danger:     #3a1e1e;
  --tag-border-danger: #6a3a3a;
  --tag-text-danger:   #cc7a7a;
  --kv-off-bg:         #2a2010;
  --kv-off-border:     #5a4a20;
  --kv-off-text:       #9a8040;
}

[data-theme="light"] {
  --bg:                #f0f2f5;
  --bg-secondary:      #e8eaed;
  --surface:           #ffffff;
  --surface-alt:       #f7f8fa;
  --border:            #d0d4da;
  --border-hover:      #a0a8b0;
  --text:              #1a1a2e;
  --text-muted:        #5a6070;
  --text-dim:          #a0a8b0;
  --accent:            #2e7d32;
  --blue:              #1565c0;
  --code-bg:           #1e2430;
  --code-text:         #7ec87e;
  --code-border:       #c8d0da;
  --tag-bg:            #e8f5e9;
  --tag-border:        #a5d6a7;
  --tag-text:          #2e7d32;
  --tag-bg-danger:     #ffebee;
  --tag-border-danger: #ef9a9a;
  --tag-text-danger:   #c62828;
  --kv-off-bg:         #fff8e1;
  --kv-off-border:     #ffe082;
  --kv-off-text:       #f57f17;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: Arial, sans-serif;
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
  padding: 16px;
  min-height: 100vh;
  transition: background 0.2s, color 0.2s;
}

@media (min-width: 480px) { body { padding: 20px 24px; } }

h2 { color: var(--text); margin: 0 0 16px; font-size: 20px; }
h3 { color: var(--text-muted); margin: 24px 0 10px; border-bottom: 1px solid var(--border); padding-bottom: 4px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
h4 { color: var(--text-muted); margin: 12px 0 6px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 2px;
}

.tabs { display: flex; }
.tab  { padding: 8px 16px; background: none; border: none; color: var(--text-muted); font-size: 14px; cursor: pointer; border-radius: 4px 4px 0 0; }
.tab.active { background: var(--surface); color: var(--text); border: 1px solid var(--border); border-bottom: none; }

.theme-toggle {
  padding: 6px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s;
}
.theme-toggle:hover { border-color: var(--border-hover); color: var(--text); }

.tab-content { display: none; }
.tab-content.active { display: block; }

.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}
.layout-left { min-width: 0; }
.layout-right .preview-panel { position: sticky; top: 16px; }
.preview-label { margin-top: 14px; margin-bottom: 4px; color: var(--text-dim); }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .layout-right .preview-panel { position: static; }
}

.field { margin-bottom: 14px; }

.field-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 5px;
  min-height: 20px;
}
.field-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.field-hint { display: block; font-size: 11px; color: var(--text-dim); margin-top: 3px; }

.kv-toggle {
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 10px;
  border: 1px solid var(--tag-border);
  background: var(--tag-bg);
  color: var(--tag-text);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
}
.field:hover .kv-toggle,
.field.kv-disabled .kv-toggle { opacity: 1; }
.field.kv-disabled .kv-toggle {
  background: var(--kv-off-bg);
  border-color: var(--kv-off-border);
  color: var(--kv-off-text);
}

.field.kv-disabled .field-input,
.field.kv-disabled .checkbox-group,
.field.kv-disabled .select-preview-row,
.field.kv-disabled .value-list {
  opacity: 0.4;
  pointer-events: none;
}
.field.kv-disabled .field-label { text-decoration: line-through; color: var(--text-dim); }

.field-input {
  width: 100%;
  padding: 6px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 13px;
  transition: border-color 0.15s;
}
.field-input:focus { outline: none; border-color: var(--accent); }

@media (min-width: 480px) {
  .field-input { max-width: 460px; }
}

.checkbox-group { display: flex; flex-wrap: wrap; gap: 6px; }
.checkbox-label {
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  padding: 4px 9px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  transition: border-color 0.15s;
  user-select: none;
}
.checkbox-label:hover { border-color: var(--border-hover); }
.checkbox-label input { accent-color: var(--accent); }

.select-preview-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.select-preview-row .field-input { flex: 1; max-width: unset; }
.texture-preview {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  object-fit: cover;
  border: 2px solid var(--border);
  flex-shrink: 0;
  background: var(--surface-alt);
}

.value-list  { display: flex; flex-direction: column; gap: 6px; margin-bottom: 8px; }
.value-row   { display: flex; gap: 6px; align-items: center; }
.value-key   { flex: 1; min-width: 0; max-width: none; }
.value-val   { flex: 1.5; min-width: 0; max-width: none; }

.btn-add-snippet {
  padding: 6px 14px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  border-radius: 4px;
  color: var(--tag-text);
  cursor: pointer;
  font-size: 13px;
  margin-right: 6px;
  margin-bottom: 4px;
  transition: background 0.15s;
}
.btn-add-snippet:hover { background: var(--surface-alt); }

.action-list { list-style: none; margin: 8px 0; }
.action-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: monospace;
  font-size: 12px;
  margin-bottom: 4px;
  color: var(--tag-text);
  word-break: break-all;
}

.btn-add, .btn-confirm {
  padding: 6px 14px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  border-radius: 4px;
  color: var(--tag-text);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-add:hover, .btn-confirm:hover { background: var(--surface-alt); }
.btn-confirm:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-cancel {
  padding: 6px 14px;
  background: var(--tag-bg-danger);
  border: 1px solid var(--tag-border-danger);
  border-radius: 4px;
  color: var(--tag-text-danger);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-cancel:hover { background: var(--surface-alt); }
.btn-remove {
  padding: 2px 7px;
  background: var(--tag-bg-danger);
  border: 1px solid var(--tag-border-danger);
  border-radius: 3px;
  color: var(--tag-text-danger);
  font-size: 11px;
  cursor: pointer;
  flex-shrink: 0;
}

.download-buttons { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.download-buttons button {
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--blue);
  border-radius: 4px;
  color: var(--blue);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.download-buttons button:hover { background: var(--blue); color: #fff; }

pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 12px;
  border-radius: 6px;
  overflow: auto;
  font-size: 12px;
  line-height: 1.6;
  white-space: pre;
  border: 1px solid var(--code-border);
  max-height: 40vh;
}

.dropdown {
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 4px 4px;
  max-height: 160px;
  overflow-y: auto;
  background: var(--surface);
}
@media (min-width: 480px) { .dropdown { max-width: 460px; } }
.dropdown div { padding: 6px 10px; cursor: pointer; font-size: 13px; }
.dropdown div:hover { background: var(--tag-bg); color: var(--tag-text); }

dialog {
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-secondary, var(--surface));
  color: var(--text);
  width: min(92vw, 700px);
  max-height: 85vh;
  margin: auto;
}
dialog[open] {
  display: flex;
  flex-direction: column;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.6); backdrop-filter: blur(2px); }

.dialog-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-height: 85vh;
  overflow: hidden;
}

.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.dialog-title { font-size: 14px; font-weight: bold; color: var(--text); }
.dialog-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  line-height: 1;
}
.dialog-close:hover { color: var(--text); background: var(--surface-alt); }

.dialog-body {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.dialog-left {
  width: 200px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
@media (max-width: 540px) { .dialog-left { width: 140px; } }

.snippet-search {
  margin: 10px;
  width: calc(100% - 20px);
  max-width: none;
  font-size: 12px;
  padding: 5px 8px;
  flex-shrink: 0;
}

.snippet-list {
  overflow-y: auto;
  flex: 1;
  padding: 0 6px 6px;
}
.snippet-list-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 7px 10px;
  background: none;
  border: none;
  border-radius: 4px;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  margin-bottom: 2px;
  transition: background 0.12s, color 0.12s;
}
.snippet-list-item:hover { background: var(--surface-alt); color: var(--text); }
.snippet-list-item.selected { background: var(--tag-bg); color: var(--tag-text); border: 1px solid var(--tag-border); }

.dialog-right {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  min-width: 0;
}
.dialog-placeholder { color: var(--text-dim); font-size: 13px; margin-top: 20px; text-align: center; }
.detail-title { font-size: 14px; font-weight: bold; color: var(--text); margin-bottom: 6px; }
.detail-requires { font-size: 11px; color: var(--text-muted); margin-bottom: 12px; font-family: monospace; }
.snippet-param { margin-bottom: 12px; }
.snippet-param-label { display: block; font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 4px; }
.snippet-param .field-input { max-width: none; }

.dialog-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.drag-handle {
  cursor: grab;
  color: var(--text-dim);
  font-size: 14px;
  padding: 0 6px 0 2px;
  flex-shrink: 0;
  user-select: none;
  touch-action: none;
}
.drag-handle:active { cursor: grabbing; }

.draggable-item { transition: opacity 0.15s; }
.draggable-item.dragging { opacity: 0.35; }
.draggable-item.drag-over {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  border-radius: 4px;
}