/* =============================================================================
 *  Lyra · screen "learning-map" (地图 / 星図) · SCOPED STYLES · FE-6 重建
 *  全部规则挂在 [data-screen="learning-map"] 下。整屏即一张可点星图银河：
 *  全幅 SVG 天空铺底 + Atlas serif hero + 诚实北极星行 + 单词/语法本入口卡。
 *  渲染配方照 v5/screen-starmap.html：幂律暗星场 + anchor 星 + halo + 发丝线 +
 *  blackbody 态色(按 displayStage→--s-*) + twinkle 仅透明度。
 *  浅色 = 刻印古星图（同几何、multiply、engr-ring 出现、无 halo），非反色。
 *  色只引令牌（--s-*/--field/--fig-line/--caps/--accent…），禁写死颜色。
 * ========================================================================== */

/* —— 根：全幅占满 #app（星空铺底，hero/north/books 浮在其上）—— */
[data-screen="learning-map"] .lm-root {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* —— 全幅星空 SVG（slice 铺满）—— */
[data-screen="learning-map"] .lm-sky {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

/* P8 空态：没学过任何词 → 居中一句邀请人话(克制,只用令牌)。 */
[data-screen="learning-map"] .lm-empty {
  position: absolute; z-index: 2;
  left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: min(78%, 320px); text-align: center; pointer-events: none;
}
[data-screen="learning-map"] .lm-empty-title {
  font-family: var(--display);
  font-size: 22px; font-weight: 600; line-height: 1.25;
  color: var(--ink-dim);
  letter-spacing: .5px;
}
[data-screen="learning-map"] .lm-empty-sub {
  margin-top: 10px;
  font-family: var(--ui);
  font-size: 13.5px; line-height: 1.55;
  color: var(--ink-faint);
}

/* twinkle = 仅透明度动画，绝不移位（CONTRACT §6 / DESIGN §4）。 */
@keyframes lm-tw  { 0%,100% { opacity: 1; }   50% { opacity: .5; } }
@keyframes lm-tw2 { 0%,100% { opacity: .9; }  50% { opacity: .42; } }
@keyframes lm-tw3 { 0%,100% { opacity: .7; }  50% { opacity: .32; } }
@keyframes lm-sel { 0%,100% { opacity: .92; } 50% { opacity: .46; } }
[data-screen="learning-map"] .lm-sky .tw   { animation: lm-tw  4.6s ease-in-out infinite; }
[data-screen="learning-map"] .lm-sky .tw-b { animation: lm-tw2 6.1s ease-in-out infinite; }
[data-screen="learning-map"] .lm-sky .tw-c { animation: lm-tw3 5.3s ease-in-out infinite; }
[data-screen="learning-map"] .lm-sky .sel-ring { animation: lm-sel 3.1s ease-in-out infinite; }

/* 发丝连线：仅 anchor 几何骨架（var(--fig-line)）。 */
[data-screen="learning-map"] .lm-links line {
  stroke: var(--fig-line);
  stroke-width: 1;
  stroke-linecap: round;
}

/* anchor 星：默认入场前微缩，.lit 后绽放（仅 transform，不与 twinkle 的 opacity 冲突）。 */
[data-screen="learning-map"] .lm-node {
  cursor: pointer;
  transform-box: fill-box;
  transform-origin: center;
  transition: transform .12s ease;
}
[data-screen="learning-map"] .lm-node:hover { transform: scale(1.4); }
[data-screen="learning-map"] .lm-node:focus-visible {
  outline: none;
  filter: drop-shadow(0 0 4px var(--accent));
}
[data-screen="learning-map"] .lm-hit { cursor: pointer; }

/* 刻印座名（caps；en=衬线斜体、jp=Noto）。 */
[data-screen="learning-map"] .lm-cap { fill: var(--caps); }
[data-screen="learning-map"] .lm-cap.en {
  font-family: var(--display);
  font-size: 13px; letter-spacing: 3.2px;
  font-style: italic; font-weight: 600;
}
[data-screen="learning-map"] .lm-cap.jp {
  font-family: var(--jp);
  font-size: 11px; letter-spacing: 3px; font-weight: 500;
}

/* 入场绽放：未 lit 时 anchor 缩为 0，lit 后归位（reduced-motion 直接 lit）。 */
[data-screen="learning-map"] .lm-sky:not(.lit) .lm-node { transform: scale(0); }
[data-screen="learning-map"] .lm-sky.lit .lm-node { transform: scale(1); transition: transform .5s cubic-bezier(.2,1.4,.4,1); }

/* ============================================================ 浅色刻印覆盖 */
/* 印刷星图：无辉光，magnitude 落在 DOT 直径；2-3 最亮 anchor 带同心 Bayer 环。 */
[data-theme="light"] [data-screen="learning-map"] .lm-sky { mix-blend-mode: multiply; }
[data-theme="light"] [data-screen="learning-map"] .halo { display: none; }
[data-theme="light"] [data-screen="learning-map"] .star.mag1 { r: 6px; }
[data-theme="light"] [data-screen="learning-map"] .star.mag2 { r: 3.6px; }
[data-theme="light"] [data-screen="learning-map"] .star.mag3 { r: 2.2px; }
[data-theme="light"] [data-screen="learning-map"] .fld { r: 1.1px; }
[data-theme="light"] [data-screen="learning-map"] .fld-mid { r: 1.8px; }
[data-theme="light"] [data-screen="learning-map"] .field { opacity: .62 !important; }
/* engr-ring（Bayer/Flamsteed 同心环）——纸上才显。 */
[data-screen="learning-map"] .engr-ring { display: none; }
[data-theme="light"] [data-screen="learning-map"] .engr-ring { display: block; opacity: .7; }

/* ============================================================ 顶部 Atlas hero */
[data-screen="learning-map"] .lm-topbar {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 4;
  padding: 18px 22px 0;
  pointer-events: none;   /* hero 文本不挡星点点击；可点元素各自 pointer-events:auto */
}
[data-screen="learning-map"] .lm-eyebrow {
  font-family: var(--ui);
  font-size: 11px; letter-spacing: 2.2px; text-transform: uppercase;
  color: var(--ink-subtle); font-weight: 500;
}
[data-screen="learning-map"] .lm-h1 {
  margin-top: 6px;
  display: flex; align-items: baseline; gap: 11px;
  font-family: var(--display);
  font-size: 48px; line-height: 1; font-weight: 600; letter-spacing: -1.2px;
  color: var(--ink);
}
[data-screen="learning-map"] .lm-count {
  font-size: 14px; font-weight: 400; color: var(--ink-muted);
  align-self: flex-end; margin-bottom: 8px;
}
/* P1-4 可见进步三层（点亮/在学/已掌握）：hero 下一行，给新用户可见成长反馈 */
[data-screen="learning-map"] .lm-progress {
  margin-top: 11px;
  display: flex; align-items: baseline; gap: 9px;
  font-family: var(--ui); font-size: 13px; color: var(--ink-muted);
}
[data-screen="learning-map"] .lm-prog-it b {
  font-size: 16px; color: var(--ink); font-weight: 600; margin-right: 3px;
  letter-spacing: -.02em;
}
[data-screen="learning-map"] .lm-prog-sep { color: var(--ink-subtle); }

/* 齿轮：右上角浮 */
[data-screen="learning-map"] .lm-settings {
  position: absolute;
  top: 16px; right: 16px;
  z-index: 6;
  width: 38px; height: 38px;
  pointer-events: auto;
}

/* ============================================================ 北极星诚实行 */
[data-screen="learning-map"] .lm-north {
  position: absolute;
  left: 22px; right: 22px; top: 150px;   /* P1-4：下移避让 hero 新增的进步三层行 */
  z-index: 4;
  font-family: var(--jp), var(--ui);
  color: var(--ink-muted);
  font-size: 14px; line-height: 1.55; letter-spacing: .1px;
}
[data-screen="learning-map"] .lm-north b {
  color: var(--accent); font-weight: 600;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums; letter-spacing: -.2px;
  font-size: 17px;
}
[data-screen="learning-map"] .lm-north-pct { color: var(--accent); font-weight: 600; }
[data-screen="learning-map"] .lm-north-conf {
  margin-left: 8px; font-size: 11px; color: var(--ink-subtle);
  border: 1px solid var(--hairline); border-radius: 999px; padding: 1px 8px;
}
[data-screen="learning-map"] .lm-north-cta {
  pointer-events: auto;
  color: var(--accent);
  font-family: var(--ui); font-size: 13.5px; font-weight: 600;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 36%, transparent);
  border-radius: 999px; padding: 4px 12px;
}

/* ============================================================ 底部渐隐 + 入口卡 */
[data-screen="learning-map"] .lm-fade-bottom {
  position: absolute; left: 0; right: 0; bottom: 0; height: 150px;
  z-index: 2; pointer-events: none;
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--sky-bottom) 62%, transparent));
}
[data-screen="learning-map"] .lm-bookbar {
  position: absolute;
  left: 16px; right: 16px; bottom: 18px;
  z-index: 5;
  display: flex; gap: 11px;
}
[data-screen="learning-map"] .lm-bookcard {
  flex: 1;
  display: flex; align-items: center; gap: 12px;
  padding: 13px 14px;
  text-align: left;
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--hairline);
  border-radius: var(--rad-md);
  transition: background .18s ease, transform .12s ease;
}
[data-screen="learning-map"] .lm-bookcard:hover { background: color-mix(in srgb, var(--surface) 92%, transparent); }
[data-screen="learning-map"] .lm-bookcard:active { transform: scale(.98); }
[data-screen="learning-map"] .lm-bk-ic {
  width: 30px; height: 30px; border-radius: var(--rad-sm);
  display: grid; place-items: center; flex-shrink: 0;
  box-shadow: inset 0 0 0 1px var(--hairline-strong);
}
[data-screen="learning-map"] .lm-bk-ic.vocab   { color: var(--s-done); }
[data-screen="learning-map"] .lm-bk-ic.grammar { color: var(--s-learn); border-radius: 50%; }
[data-screen="learning-map"] .lm-bk-col { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
[data-screen="learning-map"] .lm-bk-t { font-family: var(--jp); font-size: 14px; font-weight: 500; color: var(--ink); letter-spacing: .2px; }
[data-screen="learning-map"] .lm-bk-n { font-size: 11px; color: var(--ink-subtle); }

/* ============================================================ 选中节点 popover */
[data-screen="learning-map"] .lm-pop {
  position: absolute;
  z-index: 7;
  background: var(--surface);
  border-radius: var(--rad-md);
  box-shadow: 0 0 0 1px var(--hairline-strong), var(--shadow-pop);
  padding: 11px 13px 12px;
  min-width: 122px;
  max-width: 200px;
}

/* reduced-motion：去入场/twinkle */
@media (prefers-reduced-motion: reduce) {
  [data-screen="learning-map"] .lm-sky .tw,
  [data-screen="learning-map"] .lm-sky .tw-b,
  [data-screen="learning-map"] .lm-sky .tw-c,
  [data-screen="learning-map"] .lm-sky .sel-ring { animation: none; }
  [data-screen="learning-map"] .lm-node { transition: none; }
  [data-screen="learning-map"] .lm-sky:not(.lit) .lm-node { transform: scale(1); }
}

/* ============================================================ 迷你星座徽章 (.mc) */
/* L.miniConstellation 产出；发现页横排/单词本/now-playing chip 复用。 */
.mc { display: inline-flex; align-items: center; gap: 6px; line-height: 1; }
.mc .mc-sky { display: block; overflow: visible; }
.mc .mc-links line { stroke: var(--fig-line); stroke-width: .8; stroke-linecap: round; }
.mc .mc-star { transition: none; }
.mc-degraded .mc-prog {
  font-size: 12px; color: var(--ink-muted);
  font-variant-numeric: tabular-nums;
}
.mc-degraded .mc-prog-star { color: var(--accent); margin-right: 2px; }
/* 浅色：迷你徽章同走刻印（multiply、无辉光——本就无 halo）。 */
[data-theme="light"] .mc .mc-sky { mix-blend-mode: multiply; }

/* —— 今日回声 chip（T1.1）：安静金边、不抢北极星 CTA —— */
.lm-echo-slot { margin: 10px 0 0; }
.lm-echo-chip {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 44px; padding: 8px 16px; border-radius: 999px;
  background: none; border: 1px solid var(--line, #2a2f3c);
  color: var(--accent, #e8b45a); font-size: 14px; cursor: pointer;
}
.lm-echo-chip:hover { border-color: var(--accent, #e8b45a); }