/* 在线工具（数学工具 / 古诗词欣赏 / 英汉词典）专用样式 —— 与 style.css 的设计变量保持一致 */

/* ── 工具首页 ── */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.tool-card { background: #fff; border: 1px solid var(--line, #e6e9ef); border-radius: 14px; padding: 22px;
  cursor: pointer; transition: .18s; display: flex; flex-direction: column; gap: 8px; }
.tool-card:hover { border-color: var(--brand, #2b6cff); box-shadow: 0 8px 24px rgba(43,108,255,.12); transform: translateY(-2px); }
.tool-card .ico { font-size: 34px; line-height: 1; }
.tool-card .tt { font-size: 17px; font-weight: 700; color: var(--ink-1, #1a1f2b); }
.tool-card .ds { font-size: 13px; color: var(--ink-2, #6b7484); line-height: 1.7; }
.tool-card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }

/* ── 工具内页布局：左侧工具切换 + 右侧面板 ── */
.tool-layout { display: grid; grid-template-columns: 210px 1fr; gap: 16px; align-items: start; }
@media (max-width: 820px) { .tool-layout { grid-template-columns: 1fr; } }
.tool-nav { background: #fff; border: 1px solid var(--line, #e6e9ef); border-radius: 14px; padding: 8px; position: sticky; top: 12px; }
.tool-nav button { display: block; width: 100%; text-align: left; border: 0; background: transparent; padding: 10px 12px;
  border-radius: 10px; font-size: 14px; color: var(--ink-2, #6b7484); cursor: pointer; font-family: inherit; }
.tool-nav button:hover { background: #f4f7fe; color: var(--brand, #2b6cff); }
.tool-nav button.on { background: var(--brand, #2b6cff); color: #fff; font-weight: 600; }
.tool-panel { background: #fff; border: 1px solid var(--line, #e6e9ef); border-radius: 14px; padding: 20px; }
.tool-panel h3 { margin: 0 0 4px; font-size: 16px; color: var(--ink-1, #1a1f2b); }
.tool-panel .desc { font-size: 13px; color: var(--ink-2, #6b7484); margin-bottom: 14px; line-height: 1.7; }

/* ── 计算器 ── */
.calc-wrap { max-width: 420px; }
.calc-screen { background: #0f1729; color: #e8f0ff; border-radius: 12px; padding: 14px 16px; text-align: right; }
.calc-screen .expr { font-size: 15px; color: #93a4c4; min-height: 20px; word-break: break-all; }
.calc-screen .val { font-size: 30px; font-weight: 700; margin-top: 6px; word-break: break-all; }
.calc-keys { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-top: 12px; }
.calc-keys button { padding: 13px 0; border: 1px solid var(--line, #e6e9ef); background: #fbfcfe; border-radius: 10px;
  font-size: 15px; cursor: pointer; font-family: inherit; color: var(--ink-1, #1a1f2b); }
.calc-keys button:hover { background: #eef4ff; border-color: var(--brand, #2b6cff); }
.calc-keys button.fn { background: #f4f7fe; color: var(--brand, #2b6cff); font-size: 13px; }
.calc-keys button.eq { background: var(--brand, #2b6cff); color: #fff; border-color: var(--brand, #2b6cff); font-weight: 700; }
.calc-keys button.wide { grid-column: span 2; }
.calc-hint { font-size: 12px; color: var(--ink-2, #6b7484); margin-top: 10px; line-height: 1.8; }
.calc-hist { margin-top: 14px; font-size: 13px; color: var(--ink-2, #6b7484); }
.calc-hist .h { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px dashed var(--line, #e6e9ef); cursor: pointer; }
.calc-hist .h:hover { color: var(--brand, #2b6cff); }

/* ── 几何/统计工具 ── */
.shape-fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.shape-fields .field input { width: 100%; }
.result-box { margin-top: 16px; background: #f6f9ff; border: 1px solid #dde7ff; border-radius: 12px; padding: 16px; }
.result-box .rl { font-size: 13px; color: var(--ink-2, #6b7484); }
.result-box .rv { font-size: 24px; font-weight: 700; color: var(--brand, #2b6cff); margin: 4px 0 10px; word-break: break-all; }
.result-box .step { font-size: 13px; color: var(--ink-2, #6b7484); line-height: 1.9; font-family: ui-monospace, Consolas, monospace; }
.formula-chip { display: inline-block; background: #eef4ff; color: #2b6cff; border-radius: 8px; padding: 3px 10px;
  font-size: 12px; font-family: ui-monospace, Consolas, monospace; margin: 2px 6px 2px 0; }

/* ── 诗词 ── */
.poem-search { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.poem-search input[type=text] { flex: 1; min-width: 200px; padding: 10px 14px; border: 1px solid var(--line, #e6e9ef);
  border-radius: 10px; font-size: 14px; font-family: inherit; }
.poem-search select { padding: 10px 12px; border: 1px solid var(--line, #e6e9ef); border-radius: 10px; font-family: inherit; font-size: 14px; }
.poem-item { padding: 12px 4px; border-bottom: 1px solid var(--line, #e6e9ef); cursor: pointer; display: flex; gap: 12px; align-items: flex-start; }
.poem-item:hover { background: #f8faff; }
.poem-item .pi-tt { font-weight: 700; color: var(--ink-1, #1a1f2b); font-size: 15px; }
.poem-item .pi-au { color: var(--ink-2, #6b7484); font-size: 13px; margin-left: 8px; font-weight: 400; }
.poem-item .pi-pv { color: var(--ink-2, #6b7484); font-size: 13px; margin-top: 4px; line-height: 1.7; }
.poem-item .pi-alias { color: var(--ink-3, #93a0b4); font-size: 12px; margin-top: 3px; }
.poem-content { font-size: 19px; line-height: 2.3; text-align: center; color: var(--ink-1, #1a1f2b); letter-spacing: 1px; }
.poem-title-main { text-align: center; font-size: 23px; font-weight: 700; margin: 4px 0 2px; }
.poem-alias { text-align: center; color: var(--ink-3, #93a0b4); font-size: 12.5px; margin-bottom: 2px; }
.poem-author { text-align: center; color: var(--ink-2, #6b7484); font-size: 14px; margin-bottom: 18px; }
.poem-sec { margin-top: 18px; }
.poem-sec h4 { margin: 0 0 8px; font-size: 14px; color: var(--brand, #2b6cff);
  border-left: 3px solid var(--brand, #2b6cff); padding-left: 8px; }
.poem-sec .body { font-size: 14.5px; line-height: 2; color: var(--ink-1, #1a1f2b); white-space: pre-wrap; }
.poem-sec .body.soft { color: var(--ink-2, #6b7484); font-size: 14px; }

/* ── 词典 ── */
.dict-search { display: flex; gap: 10px; align-items: center; margin-bottom: 6px; }
.dict-search .box { position: relative; flex: 1; }
.dict-search input { width: 100%; padding: 12px 16px; border: 1px solid var(--line, #e6e9ef); border-radius: 12px;
  font-size: 15px; font-family: inherit; box-sizing: border-box; }
.dict-search .mode { display: flex; border: 1px solid var(--line, #e6e9ef); border-radius: 10px; overflow: hidden; }
.dict-search .mode button { border: 0; background: #fff; padding: 11px 14px; cursor: pointer; font-size: 13px;
  color: var(--ink-2, #6b7484); font-family: inherit; }
.dict-search .mode button.on { background: var(--brand, #2b6cff); color: #fff; }
.suggest { position: absolute; left: 0; right: 0; top: 100%; background: #fff; border: 1px solid var(--line, #e6e9ef);
  border-radius: 0 0 12px 12px; box-shadow: 0 10px 24px rgba(15,23,41,.08); z-index: 30; max-height: 260px; overflow: auto; }
.suggest div { padding: 9px 16px; cursor: pointer; font-size: 14px; }
.suggest div:hover, .suggest div.on { background: #f2f7ff; color: var(--brand, #2b6cff); }
.word-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.word-head .w { font-size: 30px; font-weight: 700; color: var(--ink-1, #1a1f2b); }
.word-head .ph { color: var(--ink-2, #6b7484); font-size: 15px; font-family: ui-monospace, Consolas, monospace; }
.word-head .spk { border: 1px solid var(--line, #e6e9ef); background: #fff; border-radius: 8px; padding: 4px 10px;
  cursor: pointer; font-size: 13px; color: var(--brand, #2b6cff); font-family: inherit; }
.sense { padding: 8px 0; border-bottom: 1px dashed var(--line, #e6e9ef); font-size: 15px; line-height: 1.8; white-space: pre-wrap; }
.sense:last-child { border-bottom: 0; }
.sense .pos { display: inline-block; min-width: 46px; color: var(--brand, #2b6cff); font-weight: 600; font-size: 13px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; margin-top: 6px; }
.form-grid .fi { background: #f7f9fc; border-radius: 10px; padding: 8px 12px; font-size: 13px; }
.form-grid .fi b { color: var(--ink-2, #6b7484); font-weight: 400; margin-right: 6px; }
.ex { padding: 10px 0; border-bottom: 1px dashed var(--line, #e6e9ef); }
.ex:last-child { border-bottom: 0; }
.ex .en { font-size: 15px; color: var(--ink-1, #1a1f2b); line-height: 1.7; }
.ex .zh { font-size: 13.5px; color: var(--ink-2, #6b7484); margin-top: 3px; line-height: 1.7; }
.chip { display: inline-block; background: #f2f7ff; color: var(--brand, #2b6cff); border-radius: 20px;
  padding: 5px 13px; font-size: 13px; margin: 0 8px 8px 0; cursor: pointer; border: 1px solid #dde7ff; }
.chip:hover { background: var(--brand, #2b6cff); color: #fff; }
.chip.plain { cursor: default; background: #f5f6f9; border-color: #ececf1; color: var(--ink-2, #6b7484); }
.chip.plain:hover { background: #f5f6f9; color: var(--ink-2, #6b7484); }