/* SaaSUtils - Main Stylesheet */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --secondary: #7c3aed;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --shadow: 0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07),0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.07),0 4px 6px rgba(0,0,0,.05);
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --font: 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --header-h: 60px;
  --transition: 0.2s ease;
}
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --border: #334155;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --shadow: 0 1px 3px rgba(0,0,0,.3),0 1px 2px rgba(0,0,0,.2);
  --shadow-md: 0 4px 6px rgba(0,0,0,.25);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.3);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;transition:background var(--transition),color var(--transition)}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font-family:var(--font)}
input,textarea,select{font-family:var(--font)}
ul{list-style:none}

/* Header */
.site-header{position:sticky;top:0;z-index:1000;background:var(--bg);border-bottom:1px solid var(--border);height:var(--header-h);display:flex;align-items:center}
.header-inner{width:100%;max-width:1280px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:16px}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1.2rem;color:var(--text);white-space:nowrap}
.logo-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:.9rem;font-weight:800}
.logo span{color:var(--primary)}
.header-search{flex:1;max-width:480px;position:relative}
.header-search input{width:100%;padding:8px 16px 8px 40px;border:1.5px solid var(--border);border-radius:24px;background:var(--bg-secondary);color:var(--text);font-size:.9rem;transition:border-color var(--transition),box-shadow var(--transition);outline:none}
.header-search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.header-search .search-icon{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:.95rem;pointer-events:none}
.search-results-dropdown{position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);max-height:340px;overflow-y:auto;z-index:999;display:none}
.search-results-dropdown.active{display:block}
.search-result-item{display:flex;align-items:center;gap:10px;padding:10px 16px;cursor:pointer;transition:background var(--transition)}
.search-result-item:hover{background:var(--bg-secondary)}
.search-result-item .tool-cat{font-size:.75rem;color:var(--text-muted);background:var(--bg-secondary);padding:2px 7px;border-radius:12px}
.header-nav{display:flex;align-items:center;gap:8px;margin-left:auto}
.btn-theme{background:none;border:1.5px solid var(--border);width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--text);font-size:1rem;transition:all var(--transition)}
.btn-theme:hover{background:var(--bg-secondary);border-color:var(--primary);color:var(--primary)}
.nav-link{font-size:.875rem;font-weight:500;color:var(--text-secondary);padding:6px 10px;border-radius:6px;transition:all var(--transition)}
.nav-link:hover{color:var(--primary);background:var(--primary-light)}

/* Main Layout */
.container{max-width:1280px;margin:0 auto;padding:0 20px}
.main-content{min-height:calc(100vh - var(--header-h) - 240px)}

/* Homepage */
.hero-minimal{padding:28px 0 8px;text-align:center}
.hero-minimal h1{font-size:1.6rem;font-weight:700;color:var(--text);margin-bottom:4px;letter-spacing:-.02em}
.hero-minimal h1 span{color:var(--primary)}
.hero-minimal p{color:var(--text-secondary);font-size:.95rem}
.hero-search{max-width:560px;margin:16px auto 0;position:relative}
.hero-search input{width:100%;padding:14px 20px 14px 48px;border:2px solid var(--border);border-radius:32px;background:var(--bg-card);color:var(--text);font-size:1rem;box-shadow:var(--shadow-md);transition:all var(--transition);outline:none}
.hero-search input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-light)}
.hero-search .search-icon{position:absolute;left:17px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:1.1rem}
.hero-search .search-btn{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:var(--primary);color:#fff;border:none;padding:8px 18px;border-radius:24px;font-size:.875rem;font-weight:600;transition:background var(--transition)}
.hero-search .search-btn:hover{background:var(--primary-dark)}

/* Stats Bar */
.stats-bar{display:flex;gap:24px;justify-content:center;padding:12px 0 0;flex-wrap:wrap}
.stat-item{font-size:.82rem;color:var(--text-muted);display:flex;align-items:center;gap:5px}
.stat-item strong{color:var(--text-secondary);font-weight:600}

/* Section */
.section{padding:28px 0}
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.section-title{font-size:1.1rem;font-weight:700;color:var(--text);display:flex;align-items:center;gap:8px}
.section-title::before{content:'';width:3px;height:18px;background:var(--primary);border-radius:2px;display:inline-block}
.view-all{font-size:.82rem;font-weight:600;color:var(--primary);display:flex;align-items:center;gap:4px}

/* Category Grid */
.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px}
.category-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:16px 14px;cursor:pointer;transition:all var(--transition);text-align:center;text-decoration:none;display:block}
.category-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.category-icon{font-size:1.8rem;margin-bottom:8px;display:block}
.category-name{font-size:.875rem;font-weight:600;color:var(--text);margin-bottom:3px}
.category-count{font-size:.75rem;color:var(--text-muted)}

/* Tools Grid */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.tool-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:14px 16px;transition:all var(--transition);text-decoration:none;display:block}
.tool-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.tool-card-header{display:flex;align-items:center;gap:10px;margin-bottom:7px}
.tool-icon{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}
.tool-card-title{font-size:.9rem;font-weight:600;color:var(--text);line-height:1.3}
.tool-card-desc{font-size:.78rem;color:var(--text-secondary);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tool-badge{font-size:.68rem;font-weight:600;padding:2px 7px;border-radius:10px;display:inline-block;margin-top:6px}
.badge-popular{background:#fef3c7;color:#92400e}
.badge-new{background:#d1fae5;color:#065f46}
[data-theme="dark"] .badge-popular{background:#451a03;color:#fbbf24}
[data-theme="dark"] .badge-new{background:#022c22;color:#34d399}

/* Category colors */
.cat-text{background:#dbeafe;color:#1d4ed8}
.cat-image{background:#ede9fe;color:#6d28d9}
.cat-dev{background:#d1fae5;color:#065f46}
.cat-calc{background:#fef3c7;color:#92400e}
.cat-seo{background:#fce7f3;color:#9d174d}
[data-theme="dark"] .cat-text{background:#1e3a5f;color:#93c5fd}
[data-theme="dark"] .cat-image{background:#2e1065;color:#c4b5fd}
[data-theme="dark"] .cat-dev{background:#022c22;color:#6ee7b7}
[data-theme="dark"] .cat-calc{background:#451a03;color:#fcd34d}
[data-theme="dark"] .cat-seo{background:#500724;color:#fbcfe8}

/* Filter Tabs */
.filter-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.filter-tab{padding:6px 14px;border:1.5px solid var(--border);border-radius:20px;font-size:.82rem;font-weight:500;color:var(--text-secondary);background:var(--bg-card);cursor:pointer;transition:all var(--transition)}
.filter-tab.active,.filter-tab:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}

/* Footer */
.site-footer{background:var(--bg-secondary);border-top:1px solid var(--border);padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:28px}
.footer-brand .logo{font-size:1.1rem;margin-bottom:10px}
.footer-brand p{font-size:.83rem;color:var(--text-muted);line-height:1.6}
.footer-col h4{font-size:.9rem;font-weight:700;color:var(--text);margin-bottom:12px}
.footer-links{display:flex;flex-direction:column;gap:7px}
.footer-links a{font-size:.83rem;color:var(--text-secondary);transition:color var(--transition)}
.footer-links a:hover{color:var(--primary)}
.footer-contact-item{display:flex;align-items:flex-start;gap:8px;margin-bottom:10px}
.footer-contact-item .icon{font-size:1rem;margin-top:1px}
.footer-contact-item div{font-size:.83rem;color:var(--text-secondary)}
.footer-contact-item a{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--border);padding-top:16px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-bottom p{font-size:.8rem;color:var(--text-muted)}
.footer-bottom-links{display:flex;gap:16px}
.footer-bottom-links a{font-size:.8rem;color:var(--text-muted);transition:color var(--transition)}
.footer-bottom-links a:hover{color:var(--primary)}

/* Breadcrumb */
.breadcrumb{padding:12px 0;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.breadcrumb a,.breadcrumb span{font-size:.82rem;color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--border)}
.breadcrumb .current{color:var(--text-secondary);font-weight:500}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border-radius:var(--radius);font-size:.875rem;font-weight:600;border:none;cursor:pointer;transition:all var(--transition);text-decoration:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-secondary{background:var(--bg-secondary);color:var(--text);border:1.5px solid var(--border)}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}
.btn-success{background:var(--success);color:#fff}
.btn-danger{background:var(--danger);color:#fff}
.btn-sm{padding:6px 12px;font-size:.8rem}
.btn-lg{padding:12px 24px;font-size:1rem}
.btn-icon{padding:8px;min-width:36px;justify-content:center}
.btn-copy{background:var(--bg-secondary);color:var(--text-secondary);border:1.5px solid var(--border)}
.btn-copy:hover{background:var(--primary-light);color:var(--primary);border-color:var(--primary)}
.btn-copy.copied{background:#d1fae5;color:#065f46;border-color:#6ee7b7}

/* Forms */
.form-group{margin-bottom:16px}
.form-label{display:block;font-size:.875rem;font-weight:500;color:var(--text);margin-bottom:6px}
.form-control{width:100%;padding:10px 14px;border:1.5px solid var(--border);border-radius:var(--radius);background:var(--bg-secondary);color:var(--text);font-size:.9rem;transition:all var(--transition);outline:none;resize:vertical}
.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);background:var(--bg-card)}
.form-control::placeholder{color:var(--text-muted)}
select.form-control{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
.form-error{font-size:.78rem;color:var(--danger);margin-top:4px}
.form-hint{font-size:.78rem;color:var(--text-muted);margin-top:4px}
.input-group{display:flex;gap:8px}
.input-group .form-control{flex:1}

/* Tool Page Layout */
.tool-page{padding:20px 0 40px}
.tool-page-header{background:var(--bg-secondary);border-bottom:1px solid var(--border);padding:20px 0}
.tool-page-title{font-size:1.5rem;font-weight:700;color:var(--text);margin-bottom:6px}
.tool-page-desc{color:var(--text-secondary);font-size:.9rem;max-width:640px}
.tool-page-meta{display:flex;gap:12px;margin-top:10px;flex-wrap:wrap}
.tool-meta-badge{font-size:.75rem;background:var(--primary-light);color:var(--primary);padding:3px 10px;border-radius:12px;font-weight:500}

/* Tool Widget */
.tool-widget{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius-xl);padding:24px;margin-bottom:24px;box-shadow:var(--shadow)}
.tool-widget-title{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.tool-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.result-area{background:var(--bg-secondary);border:1.5px solid var(--border);border-radius:var(--radius);padding:14px;min-height:80px;font-family:'Fira Code',monospace;font-size:.875rem;color:var(--text);white-space:pre-wrap;word-break:break-all;position:relative}
.result-label{font-size:.78rem;font-weight:600;color:var(--text-muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em}

/* Article Content */
.tool-article{max-width:800px}
.tool-article h2{font-size:1.2rem;font-weight:700;color:var(--text);margin:28px 0 10px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.tool-article h3{font-size:1rem;font-weight:600;color:var(--text);margin:20px 0 8px}
.tool-article p{font-size:.9rem;color:var(--text-secondary);line-height:1.8;margin-bottom:12px}
.tool-article ul,.tool-article ol{padding-left:20px;margin-bottom:12px}
.tool-article li{font-size:.9rem;color:var(--text-secondary);line-height:1.8;margin-bottom:4px}
.tool-article ul li{list-style:disc}
.tool-article ol li{list-style:decimal}

/* TOC */
.toc-widget{background:var(--bg-secondary);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:16px;margin-bottom:24px}
.toc-widget h3{font-size:.875rem;font-weight:700;margin-bottom:10px;color:var(--text)}
.toc-list{display:flex;flex-direction:column;gap:4px}
.toc-list a{font-size:.82rem;color:var(--text-secondary);padding:3px 8px;border-radius:4px;display:flex;align-items:center;gap:6px;transition:all var(--transition)}
.toc-list a:hover,.toc-list a.active{color:var(--primary);background:var(--primary-light)}
.toc-list a::before{content:'→';font-size:.7rem;color:var(--text-muted)}

/* FAQ */
.faq-section{margin-top:32px}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-lg);margin-bottom:8px;overflow:hidden}
.faq-question{width:100%;text-align:left;padding:14px 16px;background:var(--bg-card);border:none;color:var(--text);font-size:.9rem;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background var(--transition)}
.faq-question:hover{background:var(--bg-secondary)}
.faq-question.active{background:var(--primary-light);color:var(--primary)}
.faq-icon{transition:transform var(--transition);font-size:.8rem;color:var(--text-muted);flex-shrink:0}
.faq-question.active .faq-icon{transform:rotate(180deg);color:var(--primary)}
.faq-answer{display:none;padding:14px 16px;font-size:.875rem;color:var(--text-secondary);line-height:1.7;border-top:1px solid var(--border)}
.faq-answer.active{display:block}

/* Related Tools */
.related-tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px;margin-top:12px}

/* Category Page */
.category-hero{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);color:#fff;padding:32px 0;margin-bottom:24px;border-radius:var(--radius-xl)}
.category-hero h1{font-size:1.8rem;font-weight:800;margin-bottom:8px}
.category-hero p{opacity:.9;font-size:.95rem;max-width:520px}

/* Pagination */
.pagination{display:flex;gap:6px;justify-content:center;padding:24px 0}
.page-btn{width:36px;height:36px;border:1.5px solid var(--border);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:600;color:var(--text-secondary);cursor:pointer;transition:all var(--transition);background:var(--bg-card)}
.page-btn:hover,.page-btn.active{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}

/* Contact & Static Pages */
.static-page{max-width:720px;margin:0 auto;padding:40px 20px}
.static-page h1{font-size:1.8rem;font-weight:800;margin-bottom:8px}
.static-page .lead{font-size:1rem;color:var(--text-secondary);margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--border)}
.static-page h2{font-size:1.1rem;font-weight:700;margin:24px 0 10px;color:var(--text)}
.static-page p{font-size:.9rem;color:var(--text-secondary);line-height:1.8;margin-bottom:12px}
.contact-form{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius-xl);padding:28px}
.alert{padding:12px 16px;border-radius:var(--radius);font-size:.875rem;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.alert-success{background:#d1fae5;color:#065f46;border:1px solid #6ee7b7}
.alert-danger{background:#fee2e2;color:#991b1b;border:1px solid #fca5a5}
[data-theme="dark"] .alert-success{background:#022c22;color:#6ee7b7}
[data-theme="dark"] .alert-danger{background:#450a0a;color:#fca5a5}

/* Utility */
.text-center{text-align:center}
.text-right{text-align:right}
.mt-4{margin-top:1rem}
.mt-8{margin-top:2rem}
.mb-4{margin-bottom:1rem}
.mb-8{margin-bottom:2rem}
.d-flex{display:flex}
.align-center{align-items:center}
.gap-8{gap:8px}
.hidden{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}

/* Loading */
.spinner{width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* Textarea resize */
textarea.form-control{min-height:120px}
textarea.form-control.large{min-height:200px}
textarea.form-control.xl{min-height:300px}

/* Range input */
input[type=range]{width:100%;accent-color:var(--primary);height:4px;cursor:pointer}
input[type=range]::-webkit-slider-thumb{width:18px;height:18px}

/* Code output */
.code-output{font-family:'Fira Code','Courier New',monospace;font-size:.83rem;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:14px;overflow-x:auto;white-space:pre;tab-size:2}

/* Canvas container */
.canvas-container{text-align:center;margin:12px 0}
.canvas-container canvas{max-width:100%;border:1px solid var(--border);border-radius:var(--radius)}

/* Progress bar */
.progress{height:6px;background:var(--border);border-radius:3px;overflow:hidden;margin-bottom:8px}
.progress-bar{height:100%;background:var(--primary);transition:width .3s ease;border-radius:3px}

/* Tables */
.data-table{width:100%;border-collapse:collapse;font-size:.875rem}
.data-table th{background:var(--bg-secondary);padding:10px 12px;text-align:left;font-weight:600;color:var(--text);border-bottom:2px solid var(--border)}
.data-table td{padding:9px 12px;border-bottom:1px solid var(--border);color:var(--text-secondary)}
.data-table tr:last-child td{border-bottom:none}
.data-table tr:hover td{background:var(--bg-secondary)}

/* Mobile Nav Toggle */
.mobile-menu-btn{display:none;background:none;border:1.5px solid var(--border);width:36px;height:36px;border-radius:8px;align-items:center;justify-content:center;color:var(--text);font-size:1.1rem}

/* Notification toast */
.toast{position:fixed;bottom:24px;right:24px;background:var(--text);color:var(--bg);padding:12px 20px;border-radius:var(--radius-lg);font-size:.875rem;font-weight:500;z-index:9999;transform:translateY(100px);opacity:0;transition:all .3s ease;display:flex;align-items:center;gap:8px;max-width:300px}
.toast.show{transform:translateY(0);opacity:1}
.toast.success{background:var(--success)}
.toast.error{background:var(--danger)}

/* Responsive */
@media(max-width:1024px){.tools-grid{grid-template-columns:repeat(auto-fill,minmax(190px,1fr))}}
@media(max-width:768px){
  .header-search{display:none}
  .mobile-menu-btn{display:flex}
  .nav-link{display:none}
  .category-grid{grid-template-columns:repeat(3,1fr)}
  .tools-grid{grid-template-columns:repeat(2,1fr)}
  .hero-minimal h1{font-size:1.3rem}
  .tool-page-title{font-size:1.2rem}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .static-page{padding:24px 16px}
  .contact-form{padding:20px 16px}
}
@media(max-width:480px){
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .tools-grid{grid-template-columns:1fr}
  .tool-actions{flex-direction:column}
  .input-group{flex-direction:column}
  .footer-grid{grid-template-columns:1fr}
  .filter-tabs{overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch;padding-bottom:4px}
}

/* Skip to content */
.skip-link{position:absolute;top:-40px;left:0;background:var(--primary);color:#fff;padding:8px;border-radius:0 0 8px 0;transition:top .2s;z-index:10000;font-size:.875rem}
.skip-link:focus{top:0}