/* ============================================================
   MC 投影工坊 — 界面样式
   深色 IDE 风格，三栏 + 顶栏 + 状态栏
   ============================================================ */

:root {
  --bg-0: #0b0e13;
  --bg-1: #12161e;
  --bg-2: #171c26;
  --bg-3: #1e2532;
  --bg-4: #252e3d;
  --line: #2a3342;
  --line-soft: #202834;
  --fg-0: #e6edf6;
  --fg-1: #a9b6c8;
  --fg-2: #6f7f95;
  --accent: #39d0ff;
  --accent-2: #7c6bff;
  --ok: #3ddc84;
  --warn: #ffb020;
  --err: #ff5d5d;
  --radius: 8px;
  --radius-sm: 5px;
  --shadow: 0 8px 28px rgba(0, 0, 0, .45);
  --mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Consolas, "Cascadia Code", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg-0);
  color: var(--fg-0);
  font: 13px/1.5 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

#app {
  display: grid;
  grid-template-rows: 48px 1fr 26px;
  height: 100vh;
}

/* ---------------- 顶栏 ---------------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 12px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border-bottom: 1px solid var(--line);
  user-select: none;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding-right: 6px;
  white-space: nowrap;
}
.brand .logo {
  color: var(--accent);
  font-size: 17px;
  text-shadow: 0 0 14px rgba(57, 208, 255, .55);
}
.brand-name { font-weight: 650; letter-spacing: .3px; }
.brand-sub {
  font-size: 10.5px;
  color: var(--fg-2);
  letter-spacing: .6px;
  text-transform: uppercase;
}

.toolbar-left, .toolbar-right { display: flex; align-items: center; gap: 6px; }
.toolbar-right { margin-left: auto; }
.sep { width: 1px; height: 20px; background: var(--line); margin: 0 4px; }

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--bg-3);
  color: var(--fg-0);
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 12.5px;
  cursor: pointer;
  transition: background .12s, border-color .12s, transform .06s;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { background: var(--bg-4); border-color: #38455a; }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .4; cursor: default; }
.btn.primary {
  background: linear-gradient(180deg, #1d7fa8, #14607f);
  border-color: #2a9dc9;
  font-weight: 600;
}
.btn.primary:hover { background: linear-gradient(180deg, #2498c4, #17718f); }
.btn.ghost { background: transparent; }
.btn.danger { border-color: #63323a; color: #ff9b9b; }
.btn.danger:hover { background: #3a1f24; }

.stat-pill {
  font: 11.5px/1 var(--mono);
  color: var(--fg-1);
  background: var(--bg-3);
  border: 1px solid var(--line-soft);
  padding: 5px 8px;
  border-radius: 20px;
  white-space: nowrap;
}

/* ---------------- 工作区 ---------------- */

.workspace {
  display: grid;
  grid-template-columns: 262px 1fr 288px;
  min-height: 0;
  background: var(--bg-0);
}

.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--bg-1);
  overflow: hidden;
}
.panel.left { border-right: 1px solid var(--line); }
.panel.right { border-left: 1px solid var(--line); }

.panel-tabs {
  display: flex;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  flex: 0 0 auto;
}
.panel-tabs .tab {
  flex: 1;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--fg-2);
  padding: 8px 4px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color .12s, border-color .12s;
}
.panel-tabs .tab:hover { color: var(--fg-0); }
.panel-tabs .tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.panel-body { flex: 1; min-height: 0; position: relative; }
.tabpane {
  display: none;
  position: absolute;
  inset: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px;
}
.tabpane.active { display: block; }

/* 滚动条 */
.tabpane::-webkit-scrollbar, .material-list::-webkit-scrollbar,
.history-list::-webkit-scrollbar { width: 9px; }
.tabpane::-webkit-scrollbar-thumb, .material-list::-webkit-scrollbar-thumb,
.history-list::-webkit-scrollbar-thumb {
  background: #2c3546;
  border-radius: 6px;
  border: 2px solid var(--bg-1);
}
.tabpane::-webkit-scrollbar-thumb:hover { background: #3b475c; }

/* ---------------- 材质列表 ---------------- */

.search-row { margin-bottom: 8px; }
.search-row input {
  width: 100%;
  background: var(--bg-0);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--fg-0);
  padding: 6px 9px;
  font: inherit;
  font-size: 12.5px;
  outline: none;
}
.search-row input:focus { border-color: var(--accent); }

.mat-toolbar { display: flex; gap: 5px; margin-bottom: 9px; }
.chip {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--bg-2);
  color: var(--fg-1);
  font: inherit;
  font-size: 11.5px;
  padding: 3px 9px;
  border-radius: 20px;
  cursor: pointer;
}
.chip:hover { background: var(--bg-4); }
.chip.active { background: rgba(57, 208, 255, .14); border-color: var(--accent); color: var(--accent); }

.material-list { display: flex; flex-direction: column; gap: 3px; padding-bottom: 20px; }

.mat-item {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 5px 7px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .1s, border-color .1s;
}
.mat-item:hover { background: var(--bg-2); border-color: var(--line-soft); }
.mat-item.selected { background: rgba(57, 208, 255, .1); border-color: rgba(57, 208, 255, .5); }
.mat-item.dimmed { opacity: .42; }

.mat-swatch {
  width: 26px; height: 26px;
  border-radius: 4px;
  border: 1px solid rgba(0, 0, 0, .5);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .07);
  image-rendering: pixelated;
  flex: 0 0 auto;
}
.mat-meta { min-width: 0; }
.mat-name {
  font-size: 12.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--fg-0);
}
.mat-id {
  font: 10.5px/1.3 var(--mono);
  color: var(--fg-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mat-count {
  font: 11px/1 var(--mono);
  color: var(--fg-1);
  background: var(--bg-3);
  padding: 2px 6px;
  border-radius: 10px;
  flex: 0 0 auto;
}

/* ---------------- 图层 ---------------- */

.field { margin-bottom: 14px; }
.field > label {
  display: block;
  font-size: 11.5px;
  color: var(--fg-2);
  margin-bottom: 6px;
  letter-spacing: .3px;
}
.field > label b { color: var(--accent); font-family: var(--mono); }

input[type=range] {
  width: 100%;
  -webkit-appearance: none;
  height: 4px;
  background: var(--bg-4);
  border-radius: 3px;
  outline: none;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-1);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(57, 208, 255, .5);
}

.seg { display: flex; border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; }
.seg button {
  flex: 1;
  appearance: none; border: 0;
  background: var(--bg-2);
  color: var(--fg-1);
  font: inherit; font-size: 11.5px;
  padding: 5px 2px;
  cursor: pointer;
  border-right: 1px solid var(--line);
}
.seg button:last-child { border-right: 0; }
.seg button.active { background: rgba(57, 208, 255, .16); color: var(--accent); }

.checks { display: flex; flex-direction: column; gap: 7px; }
.checks label {
  display: flex; align-items: center; gap: 7px;
  font-size: 12.5px; color: var(--fg-1); cursor: pointer;
}
.checks input[type=checkbox] { accent-color: var(--accent); width: 14px; height: 14px; }

.layer-strip {
  display: flex;
  flex-direction: column-reverse;
  gap: 1px;
  max-height: 300px;
  overflow-y: auto;
  margin-bottom: 14px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 4px;
  background: var(--bg-0);
}
.layer-row {
  display: flex; align-items: center; gap: 6px;
  padding: 2px 5px; border-radius: 3px; cursor: pointer;
  font: 10.5px/1.5 var(--mono); color: var(--fg-2);
}
.layer-row:hover { background: var(--bg-2); }
.layer-row.active { background: rgba(57, 208, 255, .16); color: var(--accent); }
.layer-bar {
  height: 7px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  min-width: 2px;
}

/* ---------------- 视口 ---------------- */

.viewport-wrap { position: relative; min-width: 0; min-height: 0; background: #0a0d12; }
#viewport { position: absolute; inset: 0; }
#viewport canvas { display: block; }
.viewport-overlay { position: absolute; inset: 0; pointer-events: none; }

.vp-left, .vp-right, .vp-bottom { position: absolute; }
.vp-left { left: 12px; top: 12px; }
.vp-right { right: 12px; top: 12px; display: flex; flex-direction: column; gap: 6px; }
.vp-bottom { left: 50%; transform: translateX(-50%); bottom: 10px; }

.vbtn {
  pointer-events: auto;
  width: 32px; height: 32px;
  border-radius: 7px;
  border: 1px solid var(--line);
  background: rgba(23, 28, 38, .82);
  color: var(--fg-1);
  font-size: 14px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: background .12s, color .12s;
}
.vbtn:hover { background: rgba(37, 46, 61, .95); color: var(--accent); }

.sel-info {
  pointer-events: auto;
  font: 11.5px/1.6 var(--mono);
  color: var(--fg-1);
  background: rgba(18, 22, 30, .82);
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: 7px;
  backdrop-filter: blur(8px);
  white-space: pre-line;
  max-width: 300px;
}
.hint {
  font-size: 11px;
  color: var(--fg-2);
  background: rgba(18, 22, 30, .7);
  padding: 4px 10px;
  border-radius: 20px;
  backdrop-filter: blur(6px);
}

.drop-mask {
  position: absolute; inset: 0;
  display: none;
  place-items: center;
  background: rgba(11, 14, 19, .82);
  border: 3px dashed var(--accent);
  border-radius: 10px;
  z-index: 20;
}
.drop-mask.show { display: grid; }
.drop-inner { text-align: center; color: var(--accent); font-size: 15px; }
.drop-icon { font-size: 42px; margin-bottom: 6px; }

/* ---------------- 工具区 ---------------- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 12px;
}
.tool {
  appearance: none;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 8px 2px 6px;
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  color: var(--fg-1);
  font: inherit; font-size: 10.5px;
  cursor: pointer;
  transition: background .12s, border-color .12s, color .12s;
}
.tool span { font-size: 16px; line-height: 1; }
.tool:hover { background: var(--bg-3); color: var(--fg-0); }
.tool.active { background: rgba(57, 208, 255, .14); border-color: var(--accent); color: var(--accent); }

.tool-panel {
  border-top: 1px solid var(--line-soft);
  padding-top: 12px;
  font-size: 12.5px;
}
.empty-hint { color: var(--fg-2); font-size: 12px; text-align: center; padding: 22px 8px; line-height: 1.7; }

.form-row { margin-bottom: 10px; }
.form-row > label {
  display: block; font-size: 11.5px; color: var(--fg-2); margin-bottom: 4px;
}
.form-row input[type=text], .form-row input[type=number], .form-row select {
  width: 100%;
  background: var(--bg-0);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--fg-0);
  padding: 6px 8px;
  font: inherit; font-size: 12.5px;
  outline: none;
}
.form-row input:focus, .form-row select:focus { border-color: var(--accent); }
.form-row .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.form-row .row3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }

.btn-row { display: flex; gap: 6px; margin-top: 10px; }
.btn-row .btn { flex: 1; }

/* ---------------- 属性 / 信息 ---------------- */

.props-body, .info-body { font-size: 12.5px; }

.prop-head {
  display: flex; align-items: center; gap: 9px;
  padding-bottom: 10px; margin-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}
.prop-head .mat-swatch { width: 34px; height: 34px; }
.prop-head .name { font-weight: 600; }
.prop-head .id { font: 11px var(--mono); color: var(--fg-2); }

.kv { display: grid; grid-template-columns: 88px 1fr; gap: 5px 8px; font-size: 12px; }
.kv dt { color: var(--fg-2); }
.kv dd { margin: 0; font-family: var(--mono); color: var(--fg-0); word-break: break-all; }

.prop-list { margin-top: 12px; }
.prop-list h4 { font-size: 11.5px; color: var(--fg-2); margin: 0 0 6px; font-weight: 500; letter-spacing: .3px; }
.prop-tag {
  display: flex; justify-content: space-between;
  font: 11.5px/1.8 var(--mono);
  padding: 1px 7px;
  background: var(--bg-2);
  border-radius: 3px;
  margin-bottom: 3px;
}
.prop-tag .k { color: var(--fg-2); }
.prop-tag .v { color: var(--accent); }

.info-grid { display: grid; grid-template-columns: 1fr; gap: 8px; }
.info-card {
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
}
.info-card h4 {
  margin: 0 0 7px; font-size: 11px; font-weight: 500;
  color: var(--fg-2); letter-spacing: .5px; text-transform: uppercase;
}
.info-card .kv { grid-template-columns: 76px 1fr; }

.bar-list { display: flex; flex-direction: column; gap: 4px; }
.bar-item { display: grid; grid-template-columns: 1fr auto; gap: 6px; font-size: 11.5px; }
.bar-track { grid-column: 1 / -1; height: 5px; background: var(--bg-4); border-radius: 3px; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }

/* ---------------- 历史 ---------------- */

.history-list { display: flex; flex-direction: column; gap: 2px; }
.hist-item {
  display: flex; align-items: center; gap: 7px;
  padding: 5px 8px; border-radius: 4px; font-size: 12px;
  color: var(--fg-2);
  cursor: pointer;
}
.hist-item .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--bg-4); flex: 0 0 auto; }
.hist-item.active { color: var(--fg-0); background: var(--bg-2); }
.hist-item.active .dot { background: var(--accent); }
.hist-item.future { opacity: .45; font-style: italic; }

/* ---------------- 状态栏 ---------------- */

.statusbar {
  display: flex; align-items: center; gap: 14px;
  padding: 0 12px;
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  font: 11px/26px var(--mono);
  color: var(--fg-2);
}
.statusbar .spacer { flex: 1; }
.statusbar span:not(.spacer) { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------------- 弹窗 / 提示 ---------------- */

.modal-root:empty { display: none; }
.modal-root {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  background: rgba(6, 8, 11, .68);
  backdrop-filter: blur(3px);
}
.modal {
  width: min(560px, 92vw);
  max-height: 86vh;
  overflow-y: auto;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 18px 20px;
}
.modal h3 { margin: 0 0 12px; font-size: 15px; font-weight: 650; }
.modal .modal-body { font-size: 13px; color: var(--fg-1); line-height: 1.75; }
.modal .modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }

.export-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 6px; }
.export-card {
  text-align: left;
  padding: 11px 12px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--fg-0);
  font: inherit;
  cursor: pointer;
}
.export-card:hover { border-color: var(--accent); background: var(--bg-3); }
.export-card b { display: block; font-size: 13px; margin-bottom: 3px; }
.export-card small { color: var(--fg-2); font-size: 11px; line-height: 1.5; }

.kbd-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.kbd-table td { padding: 5px 0; border-bottom: 1px solid var(--line-soft); }
.kbd-table td:first-child { width: 42%; }
kbd {
  display: inline-block;
  font: 11px/1 var(--mono);
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 3px 6px;
  color: var(--fg-0);
}

.toast-root {
  position: fixed;
  bottom: 42px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; gap: 7px;
  z-index: 200;
  pointer-events: none;
}
.toast {
  background: rgba(24, 30, 40, .96);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  color: var(--fg-0);
  font-size: 12.5px;
  padding: 8px 14px;
  border-radius: 6px;
  box-shadow: var(--shadow);
  animation: toastIn .18s ease-out;
  max-width: 60vw;
}
.toast.ok { border-left-color: var(--ok); }
.toast.err { border-left-color: var(--err); }
.toast.warn { border-left-color: var(--warn); }
@keyframes toastIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* 载入遮罩 */
.loading-mask {
  position: fixed; inset: 0; z-index: 150;
  display: grid; place-items: center;
  background: rgba(6, 8, 11, .8);
  color: var(--accent);
  font-size: 14px;
}
.loading-mask .spin {
  width: 34px; height: 34px;
  border: 3px solid var(--bg-4);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 窄屏 */
@media (max-width: 1180px) {
  .workspace { grid-template-columns: 216px 1fr 240px; }
  .brand-sub { display: none; }
}
@media (max-width: 900px) {
  .workspace { grid-template-columns: 1fr; }
  .panel { display: none; }
}