/* ============================================================
   乐学堂 · 汉字演变馆 —— 专属样式
   四段字形演变条 / 大楷字 / 字理故事 / 猜字模式 / 馆前必读 / 打印
   配色：宣纸暖底 + 印章红点缀
   ============================================================ */

/* ---------- 专题横幅 ---------- */
.textbook-banner {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin: 0 0 16px; padding: 12px 16px;
  background: linear-gradient(135deg, #fdf3e7, #faf1e0);
  border: 1px solid #eeddc4; border-radius: 14px;
  color: #9a3412; font-size: 14px; font-weight: 700;
}
.textbook-banner strong { font-size: 16px; }

.goal-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.goal-tags span {
  background: color-mix(in srgb, var(--c) 12%, white);
  border: 1px solid color-mix(in srgb, var(--c) 30%, white);
  color: #4a4f63; border-radius: 999px; padding: 3px 10px;
  font-size: 12.5px; font-weight: 700;
}

/* ---------- 猜字模式开关 ---------- */
.guess-btn { border: 2px dashed #c2571f; color: #c2571f; }
.guess-btn.on { background: #c2571f; border-style: solid; color: #fff; }

/* ---------- 字卡 ---------- */
.hanzi-cards { display: block; }
.hanzi-card {
  --c: #9a3412;
  position: relative;
  background: var(--card); border-radius: 18px; padding: 16px 18px 14px;
  border: 1.5px solid color-mix(in srgb, var(--c) 28%, white);
  box-shadow: 0 2px 10px rgba(90, 60, 20, 0.06);
  margin-bottom: 18px;
}
.hanzi-card.learned { opacity: 0.72; }
.hanzi-card.learned::after {
  content: '已认全';
  position: absolute; top: 12px; right: -6px;
  background: #4c8a1f; color: #fff; font-size: 11.5px; font-weight: 700;
  padding: 3px 10px; border-radius: 999px;
}
.hanzi-card.flash { outline: 3px solid #c2571f; outline-offset: 2px; }

.hhead { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 12px; }
.hchar-block {
  position: relative; flex: 0 0 auto;
  width: 92px; height: 92px; border-radius: 16px;
  background: color-mix(in srgb, var(--c) 9%, white);
  border: 2px solid color-mix(in srgb, var(--c) 34%, white);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.hchar {
  font-family: 'Kaiti SC', 'STKaiti', 'KaiTi', '楷体', serif;
  font-size: 54px; line-height: 1; font-weight: 700; color: var(--ink, #33302b);
}
.hpinyin { margin-top: 4px; font-size: 15px; font-weight: 700; color: var(--c); }
.reveal-btn { display: none; margin-top: 5px; }

.hmeta { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 8px; }
.hbadges { display: flex; flex-wrap: wrap; gap: 6px; }
.hbadge {
  background: color-mix(in srgb, var(--c) 12%, white);
  border: 1px solid color-mix(in srgb, var(--c) 32%, white);
  color: #4a4f63; border-radius: 999px; padding: 3px 11px;
  font-size: 13px; font-weight: 700; text-decoration: none;
}
.hbadge.type-badge { background: var(--c); border-color: var(--c); color: #fff; }
.hbadge.poly-badge { background: #fff7ed; border-color: #c2571f; color: #b4530f; }
.htools { display: flex; align-items: center; gap: 8px; }
.htools .learn-btn { margin-left: auto; }

/* ---------- 四段演变条 ---------- */
.evo-strip {
  display: flex; align-items: stretch; gap: 6px;
  overflow-x: auto; padding: 4px 2px 6px;
  background: color-mix(in srgb, var(--c) 5%, white);
  border-radius: 14px; border: 1px dashed color-mix(in srgb, var(--c) 30%, white);
}
.stage-cell {
  flex: 1 1 0; min-width: 96px;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  text-align: center; padding: 8px 6px 7px;
  border-radius: 12px; background: var(--card);
  border: 1px solid color-mix(in srgb, var(--c) 18%, white);
}
.stage-arrow {
  align-self: center; flex: 0 0 auto;
  font-size: 20px; font-weight: 800; color: color-mix(in srgb, var(--c) 55%, white);
}
.stage-box {
  width: 84px; height: 84px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: #fff; border: 1px solid color-mix(in srgb, var(--c) 24%, white);
}
.stage-box img { width: 74px; height: 74px; object-fit: contain; }
.stage-kai {
  font-family: 'Kaiti SC', 'STKaiti', 'KaiTi', '楷体', serif;
  font-size: 46px; font-weight: 700; color: #9a3412; line-height: 1;
}
.stage-none { font-size: 12.5px; color: #a0988c; font-weight: 700; padding: 0 6px; }
.stage-name { font-size: 13.5px; font-weight: 800; color: var(--ink, #33302b); }
.stage-era { font-size: 11.5px; color: #8f8779; }
.stage-note { font-size: 12px; color: #6f6a60; line-height: 1.45; margin-top: 2px; }
.stage-missing .stage-box { background: #f7f4ee; border-style: dashed; }
.stage-cell { font: inherit; color: inherit; cursor: pointer; transition: border-color .2s ease, background .2s ease; }
.stage-cell:disabled { opacity: 1; cursor: default; }
.stage-cell[aria-pressed="true"] { border: 2px solid var(--c); padding: 7px 5px 6px; background: color-mix(in srgb, var(--c) 12%, white); }
.stage-cell:focus-visible { outline: 3px solid var(--c); outline-offset: 2px; }
.evo-controls { padding: 12px; margin-top: 8px; border-radius: 12px; background: color-mix(in srgb, var(--c) 6%, var(--card)); }
.evo-controls[hidden] { display: none; }
.evo-buttons { display: flex; flex-wrap: wrap; gap: 7px; }
.evo-buttons button { min-height: 40px; padding: 6px 11px; border-radius: 9px; border: 1px solid color-mix(in srgb, var(--c) 40%, white); background: var(--card); color: var(--c); font: inherit; font-size: 15px; font-weight: 750; cursor: pointer; }
.evo-buttons button[aria-pressed="true"] { color: white; background: var(--c); }
.evo-buttons button:disabled { opacity: .5; cursor: default; }
.evo-controls p { margin: 10px 0 4px; color: var(--ink); font-size: 16px; line-height: 1.7; }
.evo-controls small { display: block; color: var(--muted); font-size: 14px; }
@media print { .evo-controls { display: none; } }

/* ---------- 故事与组词 ---------- */
.seclabel {
  display: inline-block; font-size: 12.5px; font-weight: 800;
  color: var(--c); letter-spacing: 1px; margin-bottom: 4px;
}
.hstory { margin-top: 10px; }
.hstory p { margin: 2px 0 0; font-size: 16.5px; line-height: 1.75; color: #3c3a35; }
.hwords { margin-top: 10px; display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.word-chip {
  background: color-mix(in srgb, var(--c) 10%, white);
  border: 1px solid color-mix(in srgb, var(--c) 30%, white);
  border-radius: 999px; padding: 3px 12px;
  font-size: 14.5px; font-weight: 700; color: #4a4f63; text-decoration: none;
}
.word-chip:hover { background: color-mix(in srgb, var(--c) 20%, white); }

/* ---------- 查一查外链 ---------- */
.hlinks { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; padding-top: 10px; border-top: 1px dashed color-mix(in srgb, var(--c) 26%, white); }
.hlink {
  background: #fff; border: 1.5px solid var(--c); color: var(--c);
  border-radius: 999px; padding: 4px 14px;
  font-size: 13.5px; font-weight: 700; text-decoration: none;
}
.hlink:hover { background: var(--c); color: #fff; }

/* ---------- 猜字模式 ---------- */
.guessing .hanzi-card:not([data-revealed]) .hchar {
  color: transparent;
  background: repeating-linear-gradient(45deg, #efe6d8 0 6px, #f7f1e6 6px 12px);
  border-radius: 10px; text-shadow: none;
}
.guessing .hanzi-card:not([data-revealed]) .hchar::after {
  content: '猜猜看？';
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: #c2571f; font-size: 17px; font-weight: 800;
  font-family: inherit;
}
.guessing .hanzi-card:not([data-revealed]) .hpinyin { visibility: hidden; }
.guessing .hanzi-card:not([data-revealed]) .reveal-btn { display: inline-block; }
.guessing .hanzi-card:not([data-revealed]) .stage-kai {
  position: relative;
  color: transparent;
  background: repeating-linear-gradient(45deg, #efe6d8 0 6px, #f7f1e6 6px 12px);
  border-radius: 8px; text-shadow: none;
}
.guessing .hanzi-card:not([data-revealed]) .stage-kai::after {
  content: '？';
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: #c2571f; font-size: 22px; font-weight: 800;
}

/* ---------- 馆前必读 ---------- */
.hall-card {
  background: linear-gradient(135deg, #fdf3e7, #fffdf8);
  border: 1.5px solid #eeddc4; border-radius: 18px;
  padding: 16px 18px; margin-bottom: 16px;
}
.hall-card h3 { margin: 0 0 6px; color: #9a3412; font-size: 18px; }
.hall-card p { margin: 0; font-size: 16.5px; line-height: 1.8; color: #4a463f; }

.stage-timeline {
  background: var(--card); border-radius: 16px; padding: 14px 16px;
  border: 1.5px solid color-mix(in srgb, var(--c) 26%, white);
  margin-bottom: 12px;
}
.tl-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.tl-emoji { font-size: 26px; }
.tl-head h3 { margin: 0; font-size: 17px; color: var(--ink, #33302b); }
.tl-when { font-size: 12.5px; font-weight: 700; color: var(--c); }
.stage-timeline p { margin: 0; font-size: 15.5px; line-height: 1.7; color: #4a463f; }

.credit-line { margin: 12px 2px 0; font-size: 12.5px; color: #8f8779; }

/* ---------- 六书速查 ---------- */
.wgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.book-card {
  background: var(--card); border-radius: 16px; padding: 14px 16px;
  border: 1.5px solid color-mix(in srgb, var(--c) 26%, white);
}
.bk-head { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.bk-emoji { font-size: 22px; }
.book-card h3 { margin: 0; font-size: 16.5px; color: var(--ink, #33302b); }
.book-card p { margin: 4px 0 8px; font-size: 14.5px; line-height: 1.65; color: #4a463f; }
.bk-examples { display: flex; flex-wrap: wrap; gap: 6px; }
.ex-char {
  width: 40px; height: 40px; border-radius: 10px;
  font-family: 'Kaiti SC', 'STKaiti', 'KaiTi', '楷体', serif;
  font-size: 24px; font-weight: 700; color: var(--ink, #33302b);
  background: color-mix(in srgb, var(--c) 10%, white);
  border: 1.5px solid color-mix(in srgb, var(--c) 34%, white);
  cursor: pointer;
}
.ex-char:hover { background: color-mix(in srgb, var(--c) 22%, white); }

/* ---------- 搜索与空态 ---------- */
.search-head {
  margin: 4px 2px 14px; font-size: 14px; font-weight: 800; color: #9a3412;
}
.empty {
  background: var(--card); border-radius: 16px; padding: 26px 18px;
  text-align: center; color: #8f8779; font-size: 15px;
}

/* ---------- 打印 ---------- */
@media print {
  .study-topic-nav, .sidebar, .toolbar, .hlinks, .reveal-btn, .say, .learn-btn { display: none !important; }
  .hanzi-card, .stage-timeline, .hall-card, .book-card { break-inside: avoid; box-shadow: none; }
  .evo-strip { overflow: visible; }
}