/* ==========================================================
   百工集 · 工具页公共样式（与 index.html 同源配色）
   主题：亮色为默认，暗色通过 [data-theme="dark"] 切换
   ========================================================== */
:root{
  --paper:#f2e9d3;
  --paper-2:#e8dcc0;
  --ink:#2b251c;
  --ink-2:#5c5345;
  --muted:rgba(43,37,28,.5);
  --red:#b3261e;
  --blue:#1d4e89;
  --line:rgba(43,37,28,.2);
  --card:#ffffff;
  --frame:#ffffff;
  --serif:'Noto Serif SC',serif;
  --display:'Playfair Display',serif;
  --mono:'IBM Plex Mono',monospace;
  --ease:cubic-bezier(.22,1,.36,1);
}
[data-theme="dark"]{
  --paper:#1c1812;
  --paper-2:#241f16;
  --ink:#eadfc4;
  --ink-2:#b5a98f;
  --muted:rgba(234,223,196,.6);
  --red:#d0533f;
  --blue:#7aa8d6;
  --line:rgba(234,223,196,.16);
  --card:#292219;
  --frame:#000000;
}
[data-theme="dark"] .topbar{background:#14100b;color:#eadfc4}
[data-theme="dark"] .feature{background:#14100b;color:#eadfc4}
[data-theme="dark"] .feature .sec-head h2{color:#eadfc4}
[data-theme="dark"] .feature .sec-head .en{color:#eadfc4}
[data-theme="dark"] .feature .flag{color:#f2e9d3}
[data-theme="dark"] .feature .btn-paper{color:#f2e9d3}
[data-theme="dark"] .socials a:hover{color:#f2e9d3}
[data-theme="dark"] .badge.new{color:#7e2215}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--serif);line-height:1.85;overflow-x:hidden;-webkit-font-smoothing:antialiased}
::selection{background:rgba(179,38,30,.2)}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.container{width:min(1080px,92%);margin:0 auto}

/* 牛皮纸纹理 */
.grain{position:fixed;inset:-50%;z-index:60;pointer-events:none;opacity:.07;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 300 300' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}

/* 顶部条 */
.topbar{background:var(--ink);color:var(--paper);padding:10px 0;font-family:var(--mono);font-size:.66rem;letter-spacing:.22em}
.topbar .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:6px}

/* 导航 / 报头 */
.nav{padding:22px 0 18px;border-bottom:3px double var(--ink)}
.nav-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px}
.masthead .name{font-family:var(--display);font-weight:900;font-size:clamp(1.5rem,3.6vw,2.2rem);letter-spacing:.24em;line-height:1.1}
.masthead .name em{font-style:normal;color:var(--red)}
.masthead .tagline{font-family:var(--mono);font-size:.62rem;letter-spacing:.3em;color:var(--ink-2);margin-top:4px}
.btn-back{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;border:1px solid var(--line);padding:9px 18px;transition:.3s;background:var(--card)}
.btn-back:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* 主题切换（顶部条内） */
.theme-toggle{display:inline-flex;align-items:center;gap:7px;background:none;border:none;padding:0;font-family:inherit;font-size:inherit;letter-spacing:inherit;color:inherit;cursor:pointer;transition:.3s;line-height:1}
.theme-toggle svg{width:13px;height:13px;flex:none}
.theme-toggle .icon-sun{display:none}
[data-theme="dark"] .theme-toggle .icon-moon{display:none}
[data-theme="dark"] .theme-toggle .icon-sun{display:block}
.theme-toggle:hover{color:var(--red)}

/* 通用按钮 */
.btn-paper{font-family:var(--mono);font-size:.74rem;letter-spacing:.2em;padding:12px 26px;background:var(--ink);color:var(--paper);border:none;cursor:pointer;transition:.3s;display:inline-block}
.btn-paper:hover{background:var(--red);transform:translateY(-2px)}
.btn-paper.outline{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-paper.outline:hover{background:var(--ink);color:var(--paper)}

/* 区块标题 */
.sec-head{display:flex;align-items:center;gap:22px;margin-bottom:34px;font-family:var(--display)}
.sec-head .no{font-size:2.2rem;font-weight:700;color:transparent;-webkit-text-stroke:1.5px var(--red);line-height:1}
.sec-head h2{font-size:clamp(1.3rem,2.6vw,1.9rem);font-weight:700;letter-spacing:.1em}
.sec-head .rule{flex:1;height:1px;background:var(--line)}
.sec-head .en{font-family:var(--mono);font-size:.62rem;letter-spacing:.24em;color:var(--muted)}

/* 工具主体 */
.tool-main{padding:52px 0 80px}
.tool-headline{border-bottom:3px double var(--ink);margin-bottom:40px;padding-bottom:22px}
.tool-headline .date-line{font-family:var(--mono);font-size:.7rem;letter-spacing:.22em;color:var(--red);margin-bottom:12px}
.tool-headline h1{font-family:var(--display);font-weight:900;font-size:clamp(1.6rem,3.6vw,2.4rem);line-height:1.3;margin-bottom:10px}
.tool-headline p{color:var(--ink-2);font-size:.92rem;max-width:640px}
@media (min-width:1000px){
  .tool-headline p{white-space:nowrap;max-width:none}
}

.panel{background:var(--card);border:1px solid var(--line);box-shadow:4px 4px 0 rgba(43,37,28,.1);padding:30px;margin-bottom:26px}
.panel h2{font-family:var(--display);font-size:1.15rem;font-weight:700;letter-spacing:.06em;margin-bottom:16px;display:flex;align-items:center;gap:12px}
.panel h2::before{content:'';width:14px;height:14px;background:var(--red);flex:none}

/* 表单控件 */
textarea,
input[type=text],
input[type=number],
input[type=password],
input[type=file],
select{
  width:100%;padding:12px 14px;border:1px solid var(--ink);background:var(--card);
  font-family:var(--mono);font-size:.84rem;color:var(--ink);outline:none;transition:.25s;
}
textarea:focus,input:focus,select:focus{border-color:var(--red);box-shadow:0 0 0 2px rgba(179,38,30,.12)}
textarea{resize:vertical;min-height:220px;line-height:1.6}
select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%235c5345'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:34px}
.btn{font-family:var(--mono);font-size:.74rem;letter-spacing:.16em;padding:12px 26px;background:var(--ink);color:var(--paper);border:none;cursor:pointer;transition:.3s;display:inline-block}
.btn:hover{background:var(--red)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--ink);background:var(--ink);color:var(--paper)}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}
.field{margin-bottom:16px}
.field label{display:block;font-family:var(--mono);font-size:.68rem;letter-spacing:.18em;color:var(--ink-2);margin-bottom:8px}
.field label em{font-style:normal;color:var(--red)}

/* 拖拽上传区 */
.file-drop{border:2px dashed var(--line);background:var(--paper);padding:44px 20px;text-align:center;cursor:pointer;transition:.3s;margin-bottom:18px}
.file-drop:hover,.file-drop.drag{border-color:var(--red);background:rgba(179,38,30,.05)}
.file-drop .fd-icon{font-size:2.2rem;margin-bottom:10px}
.file-drop p{font-size:.88rem;color:var(--ink-2)}
.file-drop p b{font-family:var(--mono);color:var(--red)}

/* 状态提示 */
.msg{display:none;padding:12px 16px;border:1px solid var(--line);margin:16px 0;font-size:.85rem}
.msg.show{display:block}
.msg.err{background:rgba(179,38,30,.08);border-color:var(--red);color:var(--red)}
.msg.ok{background:rgba(47,107,51,.08);border-color:#2f6b33;color:#2f6b33}

/* 结果输出 */
.result-head{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:14px}
.result-head h3{font-family:var(--display);font-size:1.05rem}
.result-stats{display:flex;gap:26px;flex-wrap:wrap;font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;color:var(--ink-2);margin-bottom:18px}
.result-stats b{color:var(--red);font-size:1.15rem}
.output-area{background:var(--paper);border:1px solid var(--line);padding:16px;font-family:var(--mono);font-size:.78rem;line-height:1.6;overflow:auto;max-height:360px;white-space:pre-wrap;word-break:break-all}
.output-area pre{font-family:inherit;white-space:pre-wrap;word-break:break-all}

/* 表格预览 */
.table-wrap{overflow:auto;border:1px solid var(--line);max-height:340px}
.table-wrap table{border-collapse:collapse;width:100%;font-family:var(--mono);font-size:.74rem}
.table-wrap th{background:var(--ink);color:var(--paper);padding:9px 12px;text-align:left;white-space:nowrap;position:sticky;top:0}
.table-wrap td{border-top:1px solid var(--line);padding:8px 12px;white-space:nowrap;max-width:280px;overflow:hidden;text-overflow:ellipsis}

/* 提示气泡 */
.toast{position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--paper);font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;padding:12px 26px;opacity:0;pointer-events:none;transition:.35s var(--ease);z-index:90;border:2px solid var(--red)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* 页脚 */
.footer{background:var(--paper-2);border-top:3px double var(--ink);padding:40px 0 32px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.footer .masthead .name{font-size:1.3rem}
.footer small{font-family:var(--mono);font-size:.62rem;letter-spacing:.2em;color:var(--ink-2)}

/* 显现动画 */
.reveal{opacity:0;transform:translateY(40px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.show{opacity:1;transform:translateY(0)}
.reveal.d1{transition-delay:.12s}.reveal.d2{transition-delay:.24s}

/* 徽章 */
.badge{font-family:var(--mono);font-size:.6rem;letter-spacing:.14em;padding:4px 10px;border-radius:99px;display:inline-block}
.badge.free{background:#e7f0e3;color:#2f6b33;border:1px solid #bcd6b5}

@media (max-width:640px){
  .panel{padding:20px}
  .btn-row .btn{flex:1;text-align:center}
}