/* 日语学习工具 · 和风暖色 */
:root {
  --bg: #faf7f0;          /* 生成り */
  --card: #ffffff;
  --ink: #2c2620;
  --ink-2: #6b625a;
  --ink-3: #9b9188;
  --accent: #d95550;      /* 朱色 */
  --accent-2: #b23a36;
  --gold: #c9a86a;        /// 金
  --indigo: #3d5a80;      /* 藍 */
  --line: #e8e2d6;
  --green: #4a8f6d;
  --chip-bg: #f1ece1;
  --shadow: 0 1px 3px rgba(60,50,35,.07);
  --radius: 14px;
}
* { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, "Hiragino Sans", "PingFang SC", sans-serif;
  background: var(--bg); color: var(--ink);
  overscroll-behavior-y: none;
}
#app { display:flex; flex-direction:column; height:100dvh; max-width:520px; margin:0 auto; }

/* ---- 顶栏 ---- */
#topbar {
  display:flex; align-items:center; justify-content:space-between;
  padding: calc(env(safe-area-inset-top) + 14px) 18px 12px;
  background: var(--bg); border-bottom: 1px solid var(--line);
  position: sticky; top:0; z-index:10;
}
#page-title { font-size:19px; font-weight:700; letter-spacing:1px; }
#page-title::after { content:""; display:inline-block; width:8px; height:8px; border-radius:50%; background:var(--accent); margin-left:8px; vertical-align: 6px; opacity:.8; }
.status-dot { width:9px; height:9px; border-radius:50%; background:var(--ink-3); font-size:11px; color:var(--ink-3); }
.status-dot.ok { background: var(--green); }
.status-dot.err { background: var(--accent); }

/* ---- 内容区 ---- */
#content { flex:1; overflow-y:auto; -webkit-overflow-scrolling:touch; padding: 14px 16px 76px; min-width:0; }
.tab { display:none; }
.tab.active { display:block; }

/* ---- 搜索 ---- */
.search-bar { position:relative; margin-bottom:10px; }
.search-bar input {
  width:100%; padding:11px 16px; font-size:16px; border-radius: 24px;
  border: 1.5px solid var(--line); background: var(--card); outline:none;
  box-shadow: var(--shadow); color:var(--ink); font-family:inherit;
}
.search-bar input:focus { border-color: var(--indigo); }

/* ---- 筛选 chips ---- */
.chip-row { display:flex; gap:7px; overflow-x:auto; padding:2px 0 10px; scrollbar-width:none; min-width:0; }
.chip-row::-webkit-scrollbar{ display:none; }
.chip-row.inline { overflow:visible; flex-wrap:wrap; padding-bottom:2px; }
.chip {
  flex:0 0 auto; padding: 5px 13px; border-radius: 16px; border:1px solid var(--line);
  background: var(--chip-bg); color:var(--ink-2); font-size:13px; font-weight:600; font-family:inherit;
}
.chip.active { background: var(--accent); border-color: var(--accent); color:#fff; }
.chip-label { flex:0 0 auto; font-size:12px; color:var(--ink-3); align-self:center; margin-right:2px; }

/* ---- 通用 ---- */
.hint { text-align:center; color:var(--ink-3); font-size:14px; line-height:1.9; margin-top: 18vh; }
.dim { color: var(--ink-3); font-size: 12.5px; }
.small { font-size: 12px; }
.results:empty + .hint { display:block; }

/* ---- 词典结果 ---- */
.wcard {
  background: var(--card); border-radius: var(--radius); padding: 14px 16px; margin-bottom:10px;
  box-shadow: var(--shadow); border: 1px solid rgba(232,226,214,.6);
}
.wcard .w-head { display:flex; align-items:baseline; gap:10px; flex-wrap:wrap; }
.wcard .w-kanji { font-size:21px; font-weight:700; letter-spacing:.5px; }
.wcard .w-kana { font-size:14.5px; color: var(--indigo); }
.wcard .w-lv { margin-left:auto; font-size:11px; font-weight:700; color:var(--accent); border:1px solid currentColor; border-radius:6px; padding:1px 7px; }
.wcard .w-pos { font-size:11.5px; color:var(--ink-3); margin:4px 0 2px; }
.wcard .w-zh { font-size:15px; line-height:1.65; margin-top:4px; }
.wcard .w-ex { margin-top:9px; border-top:1px dashed var(--line); padding-top:8px; }
.wcard .w-ex .ex-jp { font-size:13.5px; line-height:1.7; }
.wcard .w-ex .ex-zh { font-size:12.5px; color:var(--ink-2); margin-top:1px; }
.wcard details summary { list-style:none; font-size:12px; color:var(--indigo); margin-top:7px; cursor:pointer; user-select:none; }
.wcard details summary::-webkit-details-marker{ display:none; }
.wcard details summary::before { content:"▸ "; }
.wcard details[open] summary::before { content:"▾ "; }

/* ---- 语法列表 ---- */
.grammar-list { display:flex; flex-direction:column; gap:9px; }
.gcard { background:var(--card); border-radius:var(--radius); padding:13px 16px; box-shadow:var(--shadow); border:1px solid rgba(232,226,214,.6); }
.gcard .g-title { font-size:16.5px; font-weight:700; }
.gcard .g-mean { font-size:13px; color:var(--ink-2); margin-top:3px; }
.gcard .g-meta { display:flex; gap:8px; margin-top:7px; align-items:center; }
.badge { font-size:10.5px; font-weight:700; padding:2px 8px; border-radius:6px; }
.badge.lv { color:var(--accent); border:1px solid currentColor; }
.badge.type { color:var(--indigo); border:1px solid var(--line); background:var(--chip-bg); }

/* 语法详情 */
.grammar-detail, .kanji-detail { animation: slidein .18s ease; }
@keyframes slidein { from{ transform:translateX(14px); opacity:0; } to{ transform:none; opacity:1; } }
.detail-back {
  display:inline-flex; align-items:center; gap:4px; font-size:13.5px; color:var(--indigo);
  margin-bottom:12px; background:none; border:none; font-family:inherit; padding:4px 0;
}
.gd-title { font-size:22px; font-weight:800; display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
.gd-title .badge.lv { font-size:12px; }
.gd-block { background:var(--card); border-radius:var(--radius); padding:13px 15px; margin-top:10px; box-shadow:var(--shadow); border:1px solid rgba(232,226,214,.6); }
.gd-label { font-size:11.5px; font-weight:700; color:var(--accent); letter-spacing:2px; margin-bottom:5px; }
.gd-block p { font-size:14.5px; line-height:1.75; }
.gd-block .structure { font-size:15px; color:var(--indigo); font-weight:600; }
.gd-ex-jp { font-size:15px; line-height:1.8; }
.gd-ex-zh { font-size:13px; color:var(--ink-2); margin-top:2px; }
.gd-tags { display:flex; gap:6px; flex-wrap:wrap; margin-top:8px; }
.gd-tags .badge { color:var(--ink-2); background:var(--chip-bg); border:none; }

/* ---- 汉字网格 ---- */
.kanji-grid { display:grid; grid-template-columns: repeat(4, 1fr); gap:9px; }
.kcell {
  background:var(--card); border-radius:12px; box-shadow:var(--shadow); border:1px solid rgba(232,226,214,.6);
  aspect-ratio: 1/1.06; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px;
  font-family:inherit;
}
.kcell .kc { font-size:30px; font-weight:600; line-height:1.15; }
.kcell .kr { font-size:10.5px; color:var(--ink-3); max-width:92%; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.kd-char {
  text-align:center; font-size:88px; font-weight:600; line-height:1.25; margin: 4px 0 2px;
  text-shadow: 0 2px 0 rgba(217,85,80,.06);
}
.kd-meta { display:flex; justify-content:center; gap:8px; flex-wrap:wrap; margin-bottom:6px; }
.kd-readings { display:grid; grid-template-columns: 1fr 1fr; gap:9px; margin-top:9px; }
.kd-readings .gd-block { margin-top:0; }
.kd-readings .jp { font-size:15px; line-height:1.9; word-break: break-all; }

/* ---- 变形 ---- */
.conj-found { background:var(--card); border-radius:var(--radius); padding:14px 16px; margin-bottom:12px; box-shadow:var(--shadow); }
.conj-found .cf-head { font-size:20px; font-weight:700; }
.conj-found .cf-sub { font-size:12.5px; color:var(--ink-3); margin-top:3px; }
.conj-table { background:var(--card); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow); }
.conj-row { display:grid; grid-template-columns: 108px 1fr; border-bottom:1px solid var(--line); }
.conj-row:last-child { border-bottom:none; }
.conj-row .cl { background:var(--chip-bg); font-size:12.5px; font-weight:600; color:var(--ink-2); padding:10px 12px; display:flex; align-items:center; }
.conj-row .cv { font-size:15.5px; padding:10px 14px; line-height:1.6; word-break:break-all; }
.conj-row .cv .alt { color:var(--ink-3); font-size:13px; }

/* ---- 对话 ---- */
.chat-scenes { display:grid; grid-template-columns:repeat(3,1fr); gap:8px; margin-bottom:12px; }
.scene {
  background:var(--card); border:1px solid rgba(232,226,214,.8); border-radius:12px; padding:10px 4px 9px;
  font-size:12px; color:var(--ink); box-shadow:var(--shadow); font-family:inherit; line-height:1.4;
}
.scene:active { background:var(--chip-bg); }
.scene.active { border-color: var(--accent); background: #fdf1f0; color: var(--accent-2); font-weight:700; }
.chat-level-row { display:flex; align-items:center; gap:8px; margin-bottom:10px; }
.chat-messages { display:flex; flex-direction:column; gap:10px; padding:6px 0 14px; min-height:38vh; }
.msg { max-width:86%; padding:10px 14px; border-radius:16px; font-size:15px; line-height:1.7; word-break:break-word; white-space:pre-wrap; }
.msg.user { align-self:flex-end; background:var(--accent); color:#fff; border-bottom-right-radius:5px; }
.msg.ai { align-self:flex-start; background:var(--card); border:1px solid rgba(232,226,214,.8); border-bottom-left-radius:5px; box-shadow:var(--shadow); }
.msg.ai .zh-line { color:var(--ink-2); font-size:13px; margin-top:6px; padding-top:6px; border-top:1px dashed var(--line); }
.msg.ai .fix-line { color:var(--accent-2); font-size:12.5px; margin-top:6px; }
.msg.ai .fix-line::before { content:"✎ "; }
.msg.ai.typing { color:var(--ink-3); font-style:italic; }
.msg.ai rt { font-size:10px; color:var(--ink-3); letter-spacing:0; }
.msg.ai ruby { ruby-position:over; }
.chat-input-bar { display:flex; gap:8px; align-items:flex-end; padding:10px 0 4px; border-top:1px solid var(--line); }
.chat-input-bar textarea {
  flex:1; resize:none; border:1.5px solid var(--line); border-radius:18px; padding:9px 15px;
  font-size:16px; font-family:inherit; background:var(--card); outline:none; max-height:110px; line-height:1.5; color:var(--ink);
}
.chat-input-bar textarea:focus { border-color:var(--indigo); }
.send-btn {
  flex:0 0 auto; background:var(--accent); color:#fff; border:none; border-radius:18px;
  padding:10px 17px; font-size:14.5px; font-weight:700; font-family:inherit;
}
.send-btn:disabled { opacity:.45; }

/* 对话设置卡 */
.chat-setup-card { background:var(--card); border-radius:var(--radius); box-shadow:var(--shadow); padding:24px 20px; margin-top:6vh; }
.setup-icon { text-align:center; font-size:38px; }
.chat-setup-card h2 { text-align:center; font-size:18px; margin:8px 0 10px; }
.chat-setup-card p { font-size:13.5px; color:var(--ink-2); line-height:1.7; margin-bottom:10px; }
.setup-steps { font-size:13.5px; color:var(--ink-2); line-height:2; padding-left:20px; margin-bottom:12px; }
.chat-setup-card a { color:var(--indigo); }
#apikey-input {
  width:100%; padding:11px 14px; font-size:15px; border:1.5px solid var(--line); border-radius:10px;
  font-family:inherit; outline:none; margin-bottom:10px; background:var(--bg);
}
#apikey-input:focus { border-color:var(--accent); }
.btn-primary {
  width:100%; background:var(--accent); color:#fff; border:none; border-radius:12px;
  padding:12px; font-size:15px; font-weight:700; font-family:inherit;
}

/* ---- 设置 ---- */
.settings-group { background:var(--card); border-radius:var(--radius); box-shadow:var(--shadow); margin-bottom:14px; overflow:hidden; }
.settings-group h3 { font-size:12px; color:var(--ink-3); letter-spacing:2px; padding:12px 16px 4px; font-weight:700; }
.settings-item {
  width:100%; display:flex; justify-content:space-between; align-items:center; gap:10px;
  padding:13px 16px; background:none; border:none; border-top:1px solid var(--line);
  font-size:14.5px; color:var(--ink); font-family:inherit; text-align:left;
}
.settings-item:first-of-type { border-top:none; }
.settings-item.static { color:var(--ink); }
.settings-value { color:var(--ink-3); font-size:13px; text-align:right; max-width:55%; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.settings-value.ok { color: var(--green); }
.settings-item .arrow { color:var(--ink-3); font-size:18px; }
.footnote { text-align:center; color:var(--ink-3); font-size:12px; margin-top:22px; }

/* ---- 底部导航 ---- */
#tabbar {
  display:flex; background:rgba(255,255,255,.94); backdrop-filter: blur(12px);
  border-top:1px solid var(--line);
  padding: 6px 4px calc(env(safe-area-inset-bottom) + 6px);
}
.tab-btn {
  flex:1; display:flex; flex-direction:column; align-items:center; gap:2px;
  background:none; border:none; font-size:10.5px; color:var(--ink-3); font-family:inherit; padding:4px 0;
}
.tab-ico { font-size:20px; line-height:1.1; filter: grayscale(1) opacity(.55); }
.tab-btn.active { color: var(--accent); font-weight:700; }
.tab-btn.active .tab-ico { filter:none; }

/* ============================================
   桌面端（≥880px）：桌面应用式布局
   和纸侧栏（印章 logo + 主导航）+ 纸白内容区
   ============================================ */
@media (min-width: 880px) {
  /* ---- 整体骨架 ---- */
  #app {
    display: grid;
    grid-template-columns: 224px 1fr;
    grid-template-rows: auto 1fr;
    grid-template-areas:
      "nav top"
      "nav main";
    max-width: none;
    height: 100dvh;
  }
  body { background: #f3ede0; } /* 侧栏同色的外框底 */

  /* ---- 侧栏：和纸质感 ---- */
  #tabbar {
    grid-area: nav;
    flex-direction: column; align-items: stretch; justify-content: flex-start;
    border-top: none; border-right: 1px solid #e3dbc8;
    background: linear-gradient(180deg, #faf6ec 0%, #f4eee0 100%);
    padding: 26px 14px 18px;
    position: sticky; top: 0; height: 100dvh;
  }
  /* 印章式 logo */
  #tabbar::before {
    content: "語";
    font-family: "Hiragino Mincho ProN", "Yu Mincho", "Songti SC", serif;
    font-size: 26px; font-weight: 700; color: #fff;
    background: var(--accent);
    width: 48px; height: 48px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 10px; line-height: 1;
    box-shadow: 0 3px 10px rgba(217,85,80,.35), inset 0 0 0 2px rgba(255,255,255,.28);
  }
  /* 底部落款 */
  #tabbar::after {
    content: "日本語 · 学習道具";
    margin-top: auto; text-align: center;
    font-size: 10.5px; letter-spacing: 2px; color: var(--ink-3);
    padding-top: 14px;
  }
  .tab-btn {
    flex: 0 0 auto;
    flex-direction: row; justify-content: flex-start; gap: 11px;
    font-size: 14px; padding: 11px 15px; border-radius: 10px;
    color: var(--ink-2); text-align: left; font-weight:600;
    transition: background .12s ease, color .12s ease;
  }
  .tab-btn:hover { background: rgba(217,85,80,.07); color: var(--ink); }
  .tab-btn .tab-ico { font-size: 16px; filter: grayscale(1) opacity(.6); transition: filter .12s ease; }
  .tab-btn.active {
    background: #fff; color: var(--accent-2);
    box-shadow: 0 2px 8px rgba(60,50,35,.1), inset 3px 0 0 var(--accent);
  }
  .tab-btn.active .tab-ico { filter:none; }

  /* ---- 顶栏：纸白主区头 ---- */
  #topbar {
    grid-area: top; padding: 22px 40px 16px;
    background: #fdfbf6; border-bottom: 1px solid var(--line);
  }
  #page-title {
    font-size: 24px; font-family: "Hiragino Mincho ProN", "Yu Mincho", "Songti SC", serif;
    letter-spacing: 2px;
  }

  /* ---- 内容区：纸白 ---- */
  #content { grid-area: main; padding: 22px 40px 48px; min-height: 0; background: #fdfbf6; }

  /* 细滚动条 */
  #content::-webkit-scrollbar, .chat-messages::-webkit-scrollbar { width: 8px; }
  #content::-webkit-scrollbar-thumb, .chat-messages::-webkit-scrollbar-thumb { background: #ddd5c4; border-radius: 4px; }

  /* 内容列居中限宽 */
  .tab > * { max-width: 900px; }
  .hint, .grammar-list, .kanji-grid { max-width: 900px; }
  .grammar-detail > *, .kanji-detail > * { max-width: 900px; }

  /* ---- 搜索框：宽扁居中 ---- */
  .search-bar { max-width: 640px; margin: 0 auto 14px; }
  .search-bar input {
    font-size: 15.5px; padding: 13px 22px; border-radius: 28px;
    box-shadow: 0 2px 6px rgba(60,50,35,.06);
  }
  .search-bar input:focus { box-shadow: 0 0 0 4px rgba(217,85,80,.1); }
  .chip-row { max-width: 640px; margin: 0 auto; }

  /* ---- 词典：双列卡片墙 ---- */
  #dict-results {
    display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: start;
    max-width: 100%;
  }
  #dict-results:empty { display: block; }
  .wcard { padding: 16px 20px; border-radius: 16px; }
  .wcard:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(60,50,35,.11); }

  /* ---- 语法 ---- */
  .gcard { padding: 15px 20px; border-radius: 16px; cursor: pointer; }
  .gcard:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(60,50,35,.11); }
  .gd-block { border-radius: 16px; }

  /* ---- 汉字：10 列 + hover 描边 ---- */
  .kanji-grid { grid-template-columns: repeat(10, 1fr); gap: 10px; }
  .kcell { cursor: pointer; transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease; }
  .kcell .kc { font-size: 36px; }
  .kcell:hover {
    transform: translateY(-3px); border-color: var(--accent);
    box-shadow: 0 5px 14px rgba(217,85,80,.14);
  }
  .kd-readings { grid-template-columns: 1fr 1fr 1fr; }

  /* ---- 变形表 ---- */
  .conj-row { transition: background .12s ease; }
  .conj-row:hover { background: #faf6ec; }
  .conj-table, .conj-found { border-radius: 16px; }

  /* ---- 对话：应用式聊天窗 ---- */
  #tab-chat.active { display: flex; flex-direction: column; height: 100%; min-height: 0; }
  #chat-main { display: flex; flex-direction: column; height: 100%; min-height: 0; max-width: 780px; margin: 0 auto; width: 100%; }
  .chat-scenes { grid-template-columns: repeat(6, 1fr); gap: 10px; }
  .scene { cursor: pointer; transition: transform .12s ease, box-shadow .12s ease; }
  .scene:hover { transform: translateY(-1px); box-shadow: 0 3px 10px rgba(60,50,35,.1); }
  .chat-messages {
    flex: 1; min-height: 0; overflow-y: auto;
    padding: 12px 4px 14px; margin-top: 4px;
    background: #f8f4ea; border: 1px solid var(--line); border-radius: 16px;
  }
  .msg { max-width: 68%; font-size: 15px; }
  .chat-input-bar {
    position: sticky; bottom: 0; padding: 12px 0 2px; margin-top: 10px;
    background: #fdfbf6;
  }
  .chat-setup-card { max-width: 460px; margin: 8vh auto 0; border-radius: 18px; }

  /* ---- 设置 ---- */
  #tab-settings { max-width: 560px; }
  .settings-group { border-radius: 16px; }
  .settings-item { cursor: pointer; }
  .settings-item:hover { background: #faf6ec; }

  /* ---- 全局指针 ---- */
  button, .chip, summary { cursor: pointer; }
  .chip { transition: border-color .12s ease, color .12s ease; }
  .chip:hover { border-color: var(--accent); color: var(--accent-2); }
}

/* 超宽屏（≥1360px）：词典三列、汉字 12 列 */
@media (min-width: 1360px) {
  #dict-results { grid-template-columns: 1fr 1fr 1fr; }
  .kanji-grid { grid-template-columns: repeat(12, 1fr); }
  .tab > *, .hint, .grammar-list, .kanji-grid { max-width: 1060px; }
  .grammar-detail > *, .kanji-detail > * { max-width: 1060px; }
}