*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--border-focus:#2563eb;--primary: #2563eb;--primary-hover:#1d4ed8;--primary-fg: #ffffff;--text: #0f172a;--muted: #64748b;--success: #10b981;--danger: #ef4444;--radius: 8px;--shadow-sm: 0 1px 3px rgba(0,0,0,.08);--shadow: 0 4px 12px rgba(0,0,0,.1);--font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mono: ui-monospace, "Cascadia Code", "Fira Mono", monospace;--nav-h: 56px}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{width:100%;max-width:960px;margin:0 auto;padding:0 20px}.container--wide{max-width:1200px}main{flex:1;padding:40px 0 80px}.site-nav{height:var(--nav-h);background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm)}.site-nav .container{display:flex;align-items:center;gap:20px}.site-logo{font-weight:700;font-size:1.1rem;color:var(--text);white-space:nowrap;text-decoration:none}.site-logo span{color:var(--primary)}.nav-search{flex:1;max-width:360px}.nav-search input{width:100%;padding:7px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:.9rem;background:var(--bg);color:var(--text);transition:border-color .15s}.nav-search input:focus{outline:none;border-color:var(--border-focus);background:var(--surface)}.nav-links{display:flex;gap:16px;list-style:none;margin-left:auto}.nav-links a{font-size:.9rem;color:var(--muted);text-decoration:none}.nav-links a:hover{color:var(--text)}.nav-links a[aria-current=page]{color:var(--primary);font-weight:600}.lang-switcher{display:flex;align-items:center;border-left:1px solid var(--border);padding-left:14px;margin-left:4px}#lang-select{appearance:none;background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%236b7280' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E") no-repeat right 8px center;border:1px solid var(--border);border-radius:6px;color:var(--text);cursor:pointer;font-size:.78rem;font-weight:500;padding:4px 26px 4px 8px;transition:border-color .12s}#lang-select:hover{border-color:var(--primary)}#lang-select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:24px}.breadcrumb a{color:var(--muted)}.breadcrumb a:hover{color:var(--primary)}.breadcrumb span{margin:0 6px}.page-header{margin-bottom:32px}.page-header h1{font-size:1.75rem;font-weight:700;line-height:1.2}.page-header p{color:var(--muted);margin-top:6px;font-size:1rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}.card+.card{margin-top:16px}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;margin-top:24px}.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm);text-decoration:none;color:var(--text);display:flex;flex-direction:column;gap:8px;transition:border-color .15s,box-shadow .15s,transform .1s}.tool-card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-1px);text-decoration:none}.tool-card__icon{font-size:1.5rem;line-height:1}.tool-card__name{font-weight:600;font-size:.95rem}.tool-card__desc{font-size:.82rem;color:var(--muted);line-height:1.4}.tool-card__tag{display:inline-block;font-size:.72rem;background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:1px 6px;color:var(--muted);margin-top:auto}.form-group{display:flex;flex-direction:column;gap:6px}.form-group+.form-group{margin-top:16px}label{font-size:.85rem;font-weight:500;color:var(--text)}input[type=text],input[type=number],input[type=search],input[type=datetime-local],textarea,select{font-family:var(--font);font-size:.95rem;padding:9px 12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);width:100%;transition:border-color .15s}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--border-focus);box-shadow:0 0 0 3px #2563eb1a}textarea{font-family:var(--mono);font-size:.88rem;resize:vertical;min-height:120px}.btn{display:inline-flex;align-items:center;gap:6px;font-family:var(--font);font-size:.9rem;font-weight:500;padding:9px 18px;border-radius:var(--radius);border:1px solid transparent;cursor:pointer;transition:background .15s,border-color .15s;white-space:nowrap;text-decoration:none}.btn-primary{background:var(--primary);color:var(--primary-fg)}.btn-primary:hover{background:var(--primary-hover);text-decoration:none;color:var(--primary-fg)}.btn-ghost{background:transparent;border-color:var(--border);color:var(--text)}.btn-ghost:hover{background:var(--bg);text-decoration:none}.btn-sm{padding:5px 12px;font-size:.82rem}.btn-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.result-box{font-family:var(--mono);font-size:.88rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;word-break:break-all;min-height:44px}.result-box--large{min-height:120px;white-space:pre-wrap}.result-label{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;font-weight:500;margin-bottom:6px}.copy-btn{font-size:.78rem;padding:3px 10px;background:var(--surface);border:1px solid var(--border);border-radius:4px;cursor:pointer;color:var(--muted);transition:color .15s,border-color .15s}.copy-btn:hover{color:var(--primary);border-color:var(--primary)}.copy-btn.copied{color:var(--success);border-color:var(--success)}.divider{border:none;border-top:1px solid var(--border);margin:28px 0}.badge{display:inline-block;font-size:.75rem;font-weight:500;padding:2px 8px;border-radius:999px;background:#dbeafe;color:#1e40af}.site-footer{background:var(--surface);border-top:1px solid var(--border);padding:24px 0;text-align:center;font-size:.82rem;color:var(--muted)}.site-footer a{color:var(--muted)}.site-footer a:hover{color:var(--primary)}.ad-slot{background:var(--bg);border:1px dashed var(--border);border-radius:var(--radius);min-height:90px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:.78rem;margin:24px 0}@media(max-width:600px){.page-header h1{font-size:1.4rem}.card{padding:16px}.nav-search{display:none}.tool-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}}