/* ========== 方家田工具箱 全局样式 ========== */
:root{
  --bg:#f5f6fa; --panel:#fff; --text:#1f2329; --muted:#6b7280;
  --primary:#2563eb; --primary-d:#1d4ed8; --border:#e5e7eb;
  --radius:10px; --shadow:0 1px 3px rgba(0,0,0,.08);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{font-size:15px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}
body.drawer-open{overflow:hidden}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* 顶栏：品牌 + 分类悬停下拉 + 右侧搜索 */
#topbar{position:sticky;top:0;z-index:200;overflow:visible;background:rgba(255,255,255,.95);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--border);box-shadow:0 1px 2px rgba(0,0,0,.04)}
.header-row{display:flex;align-items:center;gap:12px;padding:0 16px;height:48px}
.logo{font-size:18px;font-weight:800;letter-spacing:.04em;color:var(--text);white-space:nowrap;flex-shrink:0}
.logo span{color:var(--primary)}
.logo:hover{text-decoration:none}
.search-box{position:relative;flex:1;max-width:480px}
#search{width:100%;height:34px;padding:0 14px;border:1px solid var(--border);border-radius:18px;background:var(--bg);outline:none;font-size:13.5px}
#search:focus{border-color:var(--primary);background:#fff}
.search-results{position:absolute;top:40px;left:0;right:0;max-height:60vh;overflow:auto;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 8px 24px rgba(0,0,0,.12);z-index:140}
.search-results a{display:flex;gap:8px;align-items:center;padding:9px 14px;color:var(--text);border-bottom:1px solid #f3f4f6}
.search-results a:hover{background:#f0f6ff;text-decoration:none}
.search-results .cat-tag{font-size:11px;color:var(--muted);margin-left:auto}
.topnav{display:flex;gap:12px;white-space:nowrap;font-size:13px;margin-left:auto}
.topnav a{color:var(--muted)}
.topnav a:hover{color:var(--primary);text-decoration:none}
#menu-toggle{display:none;background:none;border:none;font-size:22px;cursor:pointer;padding:4px 8px;line-height:1;color:var(--text)}

.nav-dropdowns{display:flex;align-items:center;flex-wrap:wrap;padding:0 10px 6px;gap:0}
.nav-dd{position:relative}
.nav-dd-trigger{display:inline-flex;align-items:center;padding:7px 9px;font-size:13.5px;color:var(--text);white-space:nowrap;border-radius:6px;cursor:pointer;user-select:none}
.nav-dd-trigger::after{content:"";width:0;height:0;margin-left:4px;border-left:3.5px solid transparent;border-right:3.5px solid transparent;border-top:4px solid currentColor;opacity:.45}
.nav-dd-trigger:hover,.nav-dd.is-active .nav-dd-trigger,.nav-dd:hover .nav-dd-trigger{color:var(--primary);background:#f0f6ff;text-decoration:none}
.nav-dd-menu{display:none;position:absolute;top:calc(100% - 2px);left:0;z-index:300;min-width:188px;max-height:min(70vh,560px);overflow:auto;padding:6px;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:0 12px 32px rgba(15,23,42,.14);grid-template-columns:1fr}
.nav-dd:hover .nav-dd-menu,.nav-dd:focus-within .nav-dd-menu{display:grid}
.nav-dd-menu.cols2{grid-template-columns:1fr 1fr;min-width:360px}
.nav-dd-menu.cols3{grid-template-columns:1fr 1fr 1fr;min-width:520px}
.nav-dd.align-end .nav-dd-menu{left:auto;right:0}
.nav-dd-menu a{display:block;padding:7px 10px;border-radius:6px;color:var(--text);font-size:13px;white-space:nowrap}
.nav-dd-menu a:hover{background:var(--primary);color:#fff;text-decoration:none}
.nav-dd-menu .nav-dd-all{grid-column:1/-1;font-weight:600;color:var(--primary);border-bottom:1px solid var(--border);margin-bottom:4px;border-radius:6px 6px 0 0}
.nav-dd-menu .nav-dd-all:hover{background:#f0f6ff;color:var(--primary-d)}

/* 布局：桌面无左侧栏，分类在顶栏下拉里 */
#layout{flex:1;display:block;min-width:0}
#drawer-overlay{position:fixed;inset:0;background:rgba(15,23,42,.4);z-index:180}
#sidebar{position:fixed;left:-300px;top:0;z-index:190;width:280px;height:100vh;overflow:auto;background:var(--panel);padding:8px 0 24px;box-shadow:4px 0 24px rgba(0,0,0,.12);transition:left .2s}
#sidebar.open{left:0}
#sidebar .drawer-head{padding:14px 16px 10px;font-size:16px}
#sidebar a{display:flex;align-items:center;gap:8px;padding:7px 16px;color:var(--text);font-size:13.5px}
#sidebar a:hover{background:#f0f6ff;text-decoration:none}
#sidebar a.active{background:#e0ecff;color:var(--primary);font-weight:600}
#sidebar details{border-bottom:1px solid #f3f4f6}
#sidebar details a{padding-left:28px;font-size:13px}
#sidebar summary .cnt{margin-left:auto;font-size:11px;color:var(--muted);font-weight:400}
#sidebar summary{cursor:pointer;padding:8px 16px;font-size:13.5px;font-weight:600;list-style:none;display:flex;align-items:center;gap:6px}
#sidebar summary::-webkit-details-marker{display:none}
#sidebar summary:hover{background:#f8fafc}
#main{padding:24px;max-width:1200px;margin:0 auto;min-width:0}
body.page-home #main{max-width:none;padding:0;width:100%}
#footer{padding:16px 20px 24px;border-top:1px solid var(--border);margin-top:auto;background:#f8fafc}
.site-footer-inner{max-width:1200px;margin:0 auto;font-size:13px;color:var(--muted);line-height:1.7;text-align:left}
.site-footer-inner p{margin:0 0 .5rem}
.site-footer-inner p:last-child{margin-bottom:0}
.site-footer-sep{color:var(--muted)}
.site-footer-note{margin-top:.75rem!important;padding-top:.75rem;border-top:1px solid var(--border)}
.site-footer-disclaimer{margin-top:.5rem!important}

/* 隐私 / 关于 / 联系 */
.legal-wrap{flex:1;width:100%;padding:28px 20px 40px}
.legal-page{max-width:42rem;margin:0 auto}
.legal-page .page-title{margin:0 0 .5rem;font-size:1.5rem;font-weight:700}
.legal-page .legal-updated{margin-bottom:1.5rem;color:var(--muted);font-size:.8125rem}
.legal-page h2{margin:1.75rem 0 .65rem;font-size:1.125rem;font-weight:650}
.legal-page p,.legal-page li{margin:0 0 .75rem;font-size:.9375rem;line-height:1.7}
.legal-page ul{margin:0 0 .75rem;padding-left:1.25rem}
.legal-page code{font-family:var(--mono);font-size:.875em}

/* 首页 */
.hero{margin-bottom:24px}
.hero h1{font-size:26px;margin-bottom:6px}
.hero p{color:var(--muted)}
.cat-section{margin-bottom:26px}
.cat-section h2{font-size:18px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.cat-section h2 .more{font-size:13px;font-weight:400}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.tool-card{display:block;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:14px;color:var(--text);box-shadow:var(--shadow);transition:transform .12s,box-shadow .12s}
.tool-card:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(0,0,0,.1);text-decoration:none;border-color:#c7dbff}
.tool-card .tname{font-weight:600;display:flex;align-items:center;gap:6px}
.tool-card .tdesc{font-size:12.5px;color:var(--muted);margin-top:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tool-card .fav-star{margin-left:auto;cursor:pointer;opacity:.35}
.tool-card .fav-star.on{opacity:1}

/* 工具页 */
.tool-head{margin-bottom:16px}
.tool-head h1{font-size:22px;display:flex;align-items:center;gap:10px}
.tool-head .crumb{font-size:13px;color:var(--muted);margin-bottom:4px}
.tool-head .desc{color:var(--muted);margin-top:4px}
.tool-head .fav-btn{cursor:pointer;font-size:20px;opacity:.4;background:none;border:none}
.tool-head .fav-btn.on{opacity:1}
.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:14px;box-shadow:var(--shadow)}
.panel>h3{font-size:15px;margin-bottom:10px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:10px}
.row>*{flex:0 0 auto}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media(max-width:760px){.grid2,.grid3{grid-template-columns:1fr}}

/* 表单控件 */
.inp,select.inp{padding:8px 10px;border:1px solid var(--border);border-radius:8px;font-size:14px;outline:none;background:#fff;min-width:0}
.inp:focus{border-color:var(--primary)}
input[type=number].inp{width:130px}
.ta{width:100%;min-height:130px;padding:10px;border:1px solid var(--border);border-radius:8px;font-family:var(--mono);font-size:13px;resize:vertical;outline:none;background:#fff}
.ta:focus{border-color:var(--primary)}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text);font-size:14px;cursor:pointer;white-space:nowrap}
.btn:hover{border-color:var(--primary);color:var(--primary)}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-d)}
.btn.small{padding:4px 10px;font-size:12.5px}
.btn:disabled{opacity:.5;cursor:not-allowed}
label.lbl{font-size:13.5px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}
.out{width:100%;min-height:80px;padding:10px;border:1px solid var(--border);border-radius:8px;background:#f8fafc;font-family:var(--mono);font-size:13px;white-space:pre-wrap;word-break:break-all}
.out:empty::before{content:"结果输出区";color:#9ca3af}
.kv-table{width:100%;border-collapse:collapse;font-size:14px}
.kv-table th,.kv-table td{border:1px solid var(--border);padding:7px 10px;text-align:left}
.kv-table th{background:#f8fafc;font-weight:600}
.kv-table tr:nth-child(even) td{background:#fafbfd}
.big-result{font-size:26px;font-weight:700;color:var(--primary);font-family:var(--mono)}
.muted{color:var(--muted);font-size:13px}
.err{color:#dc2626;font-size:13px}
.ok{color:#16a34a;font-size:13px}
.tag{display:inline-block;padding:2px 8px;border-radius:10px;background:#eef2ff;color:#4338ca;font-size:12px;margin:2px}
.hidden{display:none!important}
canvas.tool-canvas{max-width:100%;border:1px solid var(--border);border-radius:8px;background:#fff}

/* toast */
#toast{position:fixed;left:50%;bottom:40px;transform:translateX(-50%);background:#111827;color:#fff;padding:9px 18px;border-radius:20px;font-size:14px;opacity:0;transition:opacity .2s;z-index:999;pointer-events:none}
#toast.show{opacity:.92}

/* diff */
.diff-add{background:#dcfce7}.diff-del{background:#fee2e2}.diff-line{font-family:var(--mono);font-size:13px;padding:1px 8px;white-space:pre-wrap;word-break:break-all}

/* 响应式 */
@media(max-width:1080px){
  .nav-dropdowns{display:none}
  #menu-toggle{display:block}
}
@media(max-width:760px){
  .topnav{display:none}
  #main{padding:16px}
  body.page-home #main{padding:0}
  body.page-legal .topnav{display:flex;flex-wrap:wrap;gap:8px 12px;font-size:12.5px}
}