:root {
  --bg: #050810;
  --panel-w: 300px;
  --panel: rgba(8, 14, 24, 0.82);
  --line: rgba(64, 110, 140, 0.35);
  --line-soft: rgba(64, 110, 140, 0.18);
  --amber: #ffb454;
  --amber-dim: #b97f34;
  --teal: #2affd5;
  --teal-dim: #189e8a;
  --green: #39ff88;
  --gray: #8a93a6;
  --swa: #4fc3ff;
  --violet: #8b7bff;
  --text: #c9d6e2;
  --dim: #5f7285;
  --mono: "JetBrains Mono", "IBM Plex Mono", monospace;
  --serif: "Noto Serif SC", serif;
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
}

#app { position: fixed; inset: 0; }
#viewport { position: absolute; inset: 0; }
#viewport canvas { display: block; }

/* ============ 覆盖特效 ============ */
.fx-scanlines {
  position: absolute; inset: 0; pointer-events: none; z-index: 40;
  background: repeating-linear-gradient(to bottom,
    rgba(180, 220, 255, 0.028) 0px, rgba(180, 220, 255, 0.028) 1px,
    transparent 1px, transparent 3px);
  mix-blend-mode: screen;
}
.fx-scanbar {
  position: absolute; left: 0; right: 0; height: 90px; z-index: 40; pointer-events: none;
  background: linear-gradient(to bottom, transparent, rgba(42, 255, 213, 0.045), transparent);
  animation: scanmove 9s linear infinite;
}
@keyframes scanmove { 0% { top: -90px; } 100% { top: 100%; } }
.fx-noise {
  position: absolute; inset: 0; z-index: 41; pointer-events: none; opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}
.fx-vignette {
  position: absolute; inset: 0; z-index: 39; pointer-events: none;
  background: radial-gradient(ellipse at 50% 42%, transparent 55%, rgba(2, 4, 9, 0.55) 100%);
}

/* ============ 十字准星 ============ */
#ch-x, #ch-y { position: absolute; z-index: 45; pointer-events: none; background: rgba(120, 190, 220, 0.22); }
#ch-x { left: 0; right: 0; height: 1px; top: -10px; }
#ch-y { top: 0; bottom: 0; width: 1px; left: -10px; }
#ch-ring {
  position: absolute; z-index: 45; pointer-events: none;
  width: 26px; height: 26px; border: 1px solid rgba(42, 255, 213, 0.4);
  border-radius: 50%; transform: translate(-50%, -50%);
  top: -50px; left: -50px;
}
#ch-ring::before, #ch-ring::after {
  content: ""; position: absolute; background: rgba(42, 255, 213, 0.4);
}
#ch-ring::before { left: 50%; top: -5px; width: 1px; height: 4px; }
#ch-ring::after { top: 50%; left: -5px; height: 1px; width: 4px; }

/* ============ HUD 面板通用 ============ */
.hud-panel {
  position: absolute; z-index: 50;
  background: var(--panel);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
  padding: 10px 14px;
}
.hud-panel::before, .hud-panel::after {
  content: ""; position: absolute; width: 10px; height: 10px; pointer-events: none;
}
.hud-panel::before { top: -1px; left: -1px; border-top: 2px solid var(--teal-dim); border-left: 2px solid var(--teal-dim); }
.hud-panel::after { bottom: -1px; right: -1px; border-bottom: 2px solid var(--teal-dim); border-right: 2px solid var(--teal-dim); }

.panel-heading {
  font-size: 10px; letter-spacing: 0.22em; color: var(--dim);
  border-bottom: 1px solid var(--line-soft); padding-bottom: 6px; margin-bottom: 8px;
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
}
.inf-heading-right { display: flex; align-items: center; gap: 8px; }
.mono { font-family: var(--mono); }
.dim { color: var(--dim); }
.amber { color: var(--amber); }
.teal { color: var(--teal); }

/* ============ 顶部：标题栏（可收起） + 常驻控制条 ============ */
#hud-topbar {
  top: 14px; left: 18px; right: 240px;
  display: flex; justify-content: space-between; align-items: flex-start; gap: 20px;
}
#hud-controls {
  top: 14px; right: 18px; z-index: 55;
  display: flex; flex-direction: column; gap: 6px; align-items: flex-end;
  padding: 8px 10px;
}
#immersive-btn.active {
  background: rgba(42, 255, 213, 0.12); border-color: var(--teal);
  color: var(--teal); box-shadow: 0 0 12px rgba(42, 255, 213, 0.18) inset;
}
.title-kicker { font-size: 10px; letter-spacing: 0.3em; color: var(--teal-dim); margin-bottom: 4px; }
.title-main {
  font-family: var(--serif); font-weight: 900; font-size: 22px; letter-spacing: 0.06em;
  color: #e8f2f8;
}
.t-amber { color: var(--amber); }
.title-sub { margin-top: 4px; font-size: 11px; color: var(--dim); letter-spacing: 0.08em; }

.control-block { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }
.btn-group { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.group-label { font-size: 10px; color: var(--dim); letter-spacing: 0.15em; margin-right: 2px; }

/* 收起开关（chevron） */
.collapse-btn {
  flex: none; font-family: var(--mono); font-size: 11px; line-height: 1;
  color: var(--dim); background: rgba(20, 34, 50, 0.6);
  border: 1px solid var(--line); padding: 3px 7px; cursor: pointer;
  transition: all 0.15s;
}
.collapse-btn:hover { color: var(--teal); border-color: var(--teal-dim); }

.hud-btn {
  font-family: var(--mono); font-size: 11px; color: var(--text);
  background: rgba(20, 34, 50, 0.7); border: 1px solid var(--line);
  padding: 5px 12px; cursor: pointer; letter-spacing: 0.06em;
  transition: all 0.15s;
}
.hud-btn:hover { border-color: var(--teal-dim); color: #fff; }
.hud-btn.active {
  background: rgba(42, 255, 213, 0.12); border-color: var(--teal);
  color: var(--teal); box-shadow: 0 0 12px rgba(42, 255, 213, 0.18) inset;
}
.hud-btn.play.active {
  background: rgba(255, 180, 84, 0.12); border-color: var(--amber);
  color: var(--amber); box-shadow: 0 0 12px rgba(255, 180, 84, 0.18) inset;
}

/* ============ 左侧图例 ============ */
#hud-legend {
  left: 18px; top: 50%; transform: translateY(-58%);
  width: var(--panel-w); max-height: 46vh; overflow-y: auto;
}
.legend-grid { display: flex; flex-direction: column; gap: 6px; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--text); line-height: 1.5; }
.sw { width: 12px; height: 12px; flex: none; border: 1px solid rgba(255,255,255,0.25); }
.sw-amber { background: #9a6a24; box-shadow: 0 0 6px rgba(255,180,84,0.6); }
.sw-teal { background: #0e8f84; box-shadow: 0 0 6px rgba(42,255,213,0.5); }
.sw-full { background: var(--green); }
.sw-reidx { background: var(--amber); }
.sw-reuse { background: var(--gray); }
.sw-swa { background: var(--swa); }
.sw-enc { background: var(--violet); }
.sw-dspark { background: #6fa8ff; }
.sw-vit { background: #17e6b0; }
.sw-ced { background: linear-gradient(90deg, transparent, var(--teal)); }
.legend-hint { margin-top: 8px; font-size: 10px; color: var(--dim); letter-spacing: 0.1em; }

/* ============ 右侧参数 ============ */
#hud-params { right: 18px; top: 110px; width: 250px; }
.param-row { margin-bottom: 14px; }
.param-row label { display: flex; justify-content: space-between; font-size: 11px; color: var(--text); margin-bottom: 6px; }
.param-row label .mono { color: var(--teal); font-size: 12px; }
.param-scale { display: flex; justify-content: space-between; font-size: 9px; color: var(--dim); margin-top: 3px; }
.param-note { font-size: 10px; color: var(--dim); line-height: 1.6; border-top: 1px dashed var(--line-soft); padding-top: 8px; }

input[type="range"] {
  width: 100%; appearance: none; height: 3px;
  background: linear-gradient(90deg, var(--teal-dim), rgba(64,110,140,0.3));
  outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none; width: 12px; height: 12px;
  background: var(--bg); border: 2px solid var(--teal);
  transform: rotate(45deg); cursor: grab;
}
input[type="range"]::-moz-range-thumb {
  width: 10px; height: 10px; background: var(--bg);
  border: 2px solid var(--teal); border-radius: 0; transform: rotate(45deg);
}

/* ============ 推理文本面板（左下，不遮挡双塔） ============ */
#hud-infer {
  left: 18px;
  bottom: 152px;
  width: var(--panel-w); max-width: 46vw;
  z-index: 50;
  padding: 10px 16px 12px;
}
#hud-infer .panel-heading { display: flex; justify-content: space-between; align-items: center; }
#inf-step { color: var(--teal); font-size: 11px; letter-spacing: 0.12em; }
.inf-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 12px; margin: 7px 0; }
.inf-label {
  flex: none; font-size: 10px; color: var(--dim); letter-spacing: 0.25em;
  border: 1px solid var(--line-soft); padding: 1px 7px;
}
.inf-ctx, .inf-gen { font-family: var(--serif); font-size: 15px; letter-spacing: 0.12em; line-height: 1.7; }
.inf-ctx { color: #4d6072; }
.ch-ctx { transition: color 0.3s, text-shadow 0.3s; }
.ch-ctx.lit { color: #dce8f2; text-shadow: 0 0 9px rgba(190, 220, 255, 0.3); }
.inf-gen { min-height: 24px; }
.ch-gen {
  color: var(--teal); display: inline-block;
  text-shadow: 0 0 12px rgba(42, 255, 213, 0.6);
  animation: chIn 0.4s ease;
}
.ch-static { color: #9fe8d8; display: inline-block; }
.ch-ghost { color: rgba(255, 255, 255, 0.35); animation: ghostIn 0.35s ease; display: inline-block; }
.ch-rej {
  color: #ff5252; display: inline-block;
  animation: shatter 0.7s ease forwards;
}
.inf-cursor { color: var(--teal); font-size: 15px; animation: blink 0.9s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
@keyframes chIn { from { opacity: 0; transform: translateY(5px); } }
@keyframes ghostIn { from { opacity: 0; transform: translateY(-4px); } }
@keyframes shatter {
  30% { opacity: 1; transform: translateY(0) scale(1.1); }
  100% { opacity: 0; transform: translateY(7px) scale(0.5); filter: blur(2px); }
}
.inf-foot {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 10px; color: var(--dim);
  border-top: 1px dashed var(--line-soft); padding-top: 6px; margin-top: 4px;
}
.inf-dspark { color: #8fc0ff; letter-spacing: 0.04em; }
.inf-src { color: #44566a; letter-spacing: 0.15em; }
.inf-hintline { font-size: 10px; color: var(--teal-dim); letter-spacing: 0.08em; margin-top: 4px; }
/* 完成态：整句亮闪 + 下划线生长 */
#hud-infer.complete .inf-gen {
  background: linear-gradient(var(--teal-dim), var(--teal-dim)) no-repeat left 100% / 0% 1px;
  animation: underlineGrow 1.6s ease 0.3s forwards, doneFlash 1.4s ease;
}
@keyframes underlineGrow { to { background-size: 100% 1px; } }
@keyframes doneFlash {
  0%, 100% { text-shadow: none; }
  35% { text-shadow: 0 0 20px rgba(42, 255, 213, 0.9); }
}

/* ============ 底部仪表 ============ */
#hud-dash { left: 18px; right: 18px; bottom: 14px; }
.dash-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 24px; }
.dash-title { font-size: 10px; letter-spacing: 0.15em; color: var(--text); margin-bottom: 6px; }
.bar-row { display: flex; align-items: center; gap: 8px; margin-bottom: 5px; }
.bar-label { width: 64px; flex: none; font-size: 10px; text-align: right; }
.bar-track { flex: 1; height: 9px; background: rgba(20, 34, 50, 0.8); border: 1px solid var(--line-soft); position: relative; overflow: hidden; }
.bar-fill { height: 100%; width: 0%; transition: width 0.25s ease; }
.bar-fill.amber { background: linear-gradient(90deg, #6e4a17, var(--amber)); box-shadow: 0 0 8px rgba(255,180,84,0.5); }
.bar-fill.teal { background: linear-gradient(90deg, #0d5f54, var(--teal)); box-shadow: 0 0 8px rgba(42,255,213,0.5); }
.bar-val { width: 76px; flex: none; font-size: 10px; color: var(--text); }

/* ============ 信息卡 ============ */
#info-card {
  position: absolute; z-index: 60; width: var(--panel-w);
  background: rgba(6, 11, 20, 0.94);
  border: 1px solid var(--teal-dim);
  box-shadow: 0 0 30px rgba(42, 255, 213, 0.12), 0 8px 30px rgba(0,0,0,0.6);
  padding: 10px 14px 14px;
  backdrop-filter: blur(8px);
}
#info-card.hidden { display: none; }
.ic-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
#ic-tag { font-size: 9px; letter-spacing: 0.2em; color: var(--teal-dim); }
#ic-close { background: none; border: none; color: var(--dim); font-size: 16px; cursor: pointer; font-family: var(--mono); }
#ic-close:hover { color: var(--amber); }
#ic-title { font-family: var(--serif); font-size: 15px; font-weight: 600; color: #eef6fb; margin-bottom: 8px; }
#ic-rows { width: 100%; border-collapse: collapse; }
#ic-rows td { font-size: 10.5px; padding: 3px 4px; border-top: 1px dashed var(--line-soft); vertical-align: top; line-height: 1.5; }
#ic-rows td:first-child { color: var(--dim); width: 38%; white-space: nowrap; }
#ic-rows td:last-child { color: var(--text); }

/* ============ 启动行 ============ */
#boot-line {
  position: absolute; z-index: 50; left: 50%; bottom: 128px; transform: translateX(-50%);
  font-size: 9px; letter-spacing: 0.3em; color: var(--teal-dim);
  animation: bootfade 1.2s ease 0.4s forwards; pointer-events: none;
}
@keyframes bootfade { to { opacity: 0; } }

/* 窄屏适配 */
@media (max-width: 1100px) {
  #hud-legend { display: none; }
  .dash-grid { grid-template-columns: 1fr; gap: 10px; }
  #hud-dash { max-height: 30vh; overflow-y: auto; }
  #hud-infer { left: 12px; width: min(92vw, var(--panel-w)); bottom: 40vh; }
}

/* ============ 面板收起 / 沉浸模式 ============ */
/* 可收起面板的基础 transition（展开时立即恢复可见） */
#hud-topbar, #hud-legend, #hud-params, #hud-infer, #hud-dash {
  transition: transform 0.45s cubic-bezier(0.5, 0, 0.2, 1),
              opacity 0.25s ease 0.05s, visibility 0s;
}
/* 收起：滑出视口 + 隐藏（visibility 延迟到动画结束后，杜绝 pointer 残留） */
#hud-topbar.collapsed { transform: translateY(-140%); opacity: 0; visibility: hidden; pointer-events: none;
  transition: transform 0.45s cubic-bezier(0.5, 0, 0.2, 1), opacity 0.2s ease, visibility 0s 0.45s; }
#hud-legend.collapsed { transform: translateY(-58%) translateX(-115%); opacity: 0; visibility: hidden; pointer-events: none;
  transition: transform 0.45s cubic-bezier(0.5, 0, 0.2, 1), opacity 0.2s ease, visibility 0s 0.45s; }
#hud-params.collapsed { transform: translateX(125%); opacity: 0; visibility: hidden; pointer-events: none;
  transition: transform 0.45s cubic-bezier(0.5, 0, 0.2, 1), opacity 0.2s ease, visibility 0s 0.45s; }
#hud-infer.collapsed { transform: translateX(-125%); opacity: 0; visibility: hidden; pointer-events: none;
  transition: transform 0.45s cubic-bezier(0.5, 0, 0.2, 1), opacity 0.2s ease, visibility 0s 0.45s; }
#hud-dash.collapsed { transform: translateY(140%); opacity: 0; visibility: hidden; pointer-events: none;
  transition: transform 0.45s cubic-bezier(0.5, 0, 0.2, 1), opacity 0.2s ease, visibility 0s 0.45s; }

/* 贴边把手 tab：半透明 + 1px 青色描边，点击恢复面板 */
.hud-handle {
  position: fixed; z-index: 54; display: none;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.3em;
  color: var(--dim); background: rgba(8, 14, 24, 0.75);
  border: 1px solid var(--teal-dim); cursor: pointer;
  padding: 12px 4px; user-select: none;
  backdrop-filter: blur(4px);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.hud-handle:hover { color: var(--teal); border-color: var(--teal); background: rgba(10, 22, 32, 0.9); }
.hud-handle.show { display: block; }
.handle-left { left: 0; top: 50%; transform: translateY(-50%); writing-mode: vertical-rl; border-left: none; }
.handle-left-low { left: 0; bottom: 300px; writing-mode: vertical-rl; border-left: none; }
.handle-right { right: 0; top: 50%; transform: translateY(-50%); writing-mode: vertical-rl; border-right: none; }
.handle-bottom { left: 50%; bottom: 0; transform: translateX(-50%); letter-spacing: 0.4em; padding: 4px 16px; border-bottom: none; }
.handle-top { left: 50%; top: 0; transform: translateX(-50%); letter-spacing: 0.4em; padding: 4px 16px; border-top: none; }