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

:root {
  --bg: #0a0a0f;
  --surface: #13131a;
  --surface2: #1c1c28;
  --border: #2a2a3a;
  --text: #e8e8f0;
  --text-muted: #6b6b8a;
  --accent: #7c6af7;
  --accent2: #f76a8a;

  --topic-tech:    #6af7c8;
  --topic-career:  #f7c86a;
  --topic-creative:#c86af7;
  --topic-life:    #6ab4f7;
  --topic-emotion: #f76a8a;
  --topic-game:    #8af76a;
}

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow: hidden;
}

#app {
  display: grid;
  grid-template-columns: 300px 1fr;
  grid-template-rows: 1fr 72px;
  height: 100vh;
}

/* ── 左侧面板 ── */
#panel {
  grid-row: 1 / 3;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}

#panel::-webkit-scrollbar { width: 4px; }
#panel::-webkit-scrollbar-track { background: transparent; }
#panel::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.panel-header {
  padding: 24px 20px 16px;
  border-bottom: 1px solid var(--border);
}

.panel-header h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text);
}

.panel-header p {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.5;
}

.section {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* 话题权重 */
.topic-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.topic-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.topic-name {
  font-size: 12px;
  width: 48px;
  flex-shrink: 0;
}

.topic-slider {
  flex: 1;
  -webkit-appearance: none;
  height: 3px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}

.topic-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.15s;
}

.topic-slider::-webkit-slider-thumb:hover { transform: scale(1.3); }

.topic-val {
  font-size: 11px;
  color: var(--text-muted);
  width: 24px;
  text-align: right;
}

/* 频率 + 平台 */
.select-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 8px;
}

.select-row label { font-size: 12px; color: var(--text-muted); }

select, .btn-group {
  width: 100%;
}

select {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  outline: none;
}

select:focus { border-color: var(--accent); }

.btn-group {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.platform-btn {
  flex: 1;
  padding: 5px 4px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text-muted);
  border-radius: 5px;
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
  min-width: 52px;
}

.platform-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--surface2));
}

/* 控制按钮 */
.controls {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.btn {
  padding: 9px 16px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { filter: brightness(1.15); }

.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--text-muted); }

.btn-danger {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-danger:hover { color: var(--accent2); border-color: var(--accent2); }

/* 统计区 */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stat-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}

.stat-val {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.stat-label {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Platform fit */
.stat-wide { grid-column: span 2; }
.stat-fit-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:6px; }
.fit-bar { height:3px; background:var(--border); border-radius:2px; overflow:hidden; }
.fit-bar-fill { height:100%; background:var(--accent); border-radius:2px; width:0%; transition:width 0.5s ease; }

/* 对比区 */
.snapshot-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.snapshot-item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: border-color 0.15s;
}

.snapshot-item:hover { border-color: var(--accent); }
.snapshot-item.active { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--surface2)); }

.snapshot-name { color: var(--text); font-weight: 500; }
.snapshot-score { color: var(--accent); font-weight: 600; }
.snapshot-del { color: var(--text-muted); cursor: pointer; padding: 2px 4px; }
.snapshot-del:hover { color: var(--accent2); }

/* ── 画布区 ── */
#canvas-wrap {
  grid-column: 2;
  grid-row: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

#sim-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* 画布上方 HUD */
#hud {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  gap: 8px;
  pointer-events: none;
}

.hud-chip {
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 11px;
  color: var(--text-muted);
  backdrop-filter: blur(8px);
}

.hud-chip span { color: var(--text); font-weight: 600; }

/* 速度状态标签 */
#speed-label {
  position: absolute;
  top: 16px;
  left: 16px;
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 11px;
  color: var(--text-muted);
  backdrop-filter: blur(8px);
}

/* ── 底栏 ── */
#statusbar {
  grid-column: 2;
  grid-row: 2;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 24px;
  overflow: hidden;
}

.mini-bar-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.mini-bar-label {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.mini-bars {
  display: flex;
  gap: 4px;
  align-items: flex-end;
  height: 28px;
}

.mini-bar-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.mini-bar-fill {
  width: 18px;
  border-radius: 3px 3px 0 0;
  transition: height 0.4s ease;
  min-height: 2px;
}

.mini-bar-tag {
  font-size: 9px;
  color: var(--text-muted);
}

.status-msg {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

/* 对比叠加线 */
.compare-line {
  stroke-dasharray: 4 3;
  opacity: 0.45;
}

/* 捕获闪光 keyframe */
@keyframes capture-flash {
  0%   { opacity: 1; transform: scale(1); }
  60%  { opacity: 0.6; transform: scale(2.5); }
  100% { opacity: 0; transform: scale(3); }
}

/* 入场动画 */
@keyframes fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

#panel { animation: fade-in 0.4s ease; }
#canvas-wrap { animation: fade-in 0.5s ease 0.1s both; }