*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;background:#f8f9fa;color:#1a1a2e;line-height:1.7;font-size:16px}
a{text-decoration:none;color:inherit}
:root{--primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#eff6ff;--bg:#f8f9fa;--bg2:#ffffff;--border:#e2e8f0;--text:#1a1a2e;--text2:#64748b;--radius:10px;--radius-lg:16px;--shadow:0 1px 3px rgba(0,0,0,.08)}

/* NAVBAR */
.navbar{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;padding:0 24px}
.navbar-inner{max-width:1100px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:56px}
.logo{font-size:20px;font-weight:700;color:var(--primary);letter-spacing:-0.5px}
.logo span{color:var(--text2);font-weight:400}
.nav-links{display:flex;gap:4px;list-style:none;align-items:center;flex:1;justify-content:center}
.nav-links a{font-size:13px;color:var(--text2);padding:5px 10px;border-radius:8px;transition:all .15s;white-space:nowrap}
.nav-links a:hover,.nav-links a.active{background:var(--primary-light);color:var(--primary)}
.mobile-menu-btn{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:8px;min-height:44px;min-width:44px}
.mobile-menu-btn span{width:20px;height:2px;background:var(--text);transition:all .3s}
.mobile-menu-btn span:nth-child(2){width:16px}

/* MOBILE NAVBAR */
@media(max-width:768px){
  .navbar{padding:0 16px}
  .navbar-inner{height:56px;padding:0}
  .nav-links{display:none;position:absolute;top:60px;left:0;right:0;background:#fff;box-shadow:0 8px 24px rgba(0,0,0,.12);border-top:1px solid #e2e8f0;z-index:999}
  .nav-links.show{display:block}
  .nav-links ul{list-style:none;padding:8px 0;margin:0}
  .nav-links a{display:flex;align-items:center;gap:10px;padding:14px 20px;font-size:15px;color:#1a1a2e;border-bottom:1px solid #f1f5f9;transition:background .15s}
  .nav-links a:hover{background:#f8f9fa;color:#2563eb}
  .mobile-menu-btn{display:flex}
  .logo{font-size:18px}
}

/* HOMEPAGE */
.hero-home{text-align:center;padding:80px 24px 60px;background:linear-gradient(135deg,var(--primary-light),#fff)}
.hero-home h1{font-size:32px;font-weight:700;color:var(--primary);margin-bottom:16px;letter-spacing:-0.5px}
.hero-home p{font-size:18px;color:var(--text2);max-width:600px;margin:0 auto}
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:800px;margin:0 auto 40px}
.stat-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;text-align:center}
.stat-number{font-size:24px;font-weight:700;color:var(--primary);margin-bottom:4px}
.stat-label{font-size:13px;color:var(--text2)}
.search-box{max-width:600px;margin:0 auto 40px}
.search-box input{width:100%;padding:16px;border:2px solid var(--border);border-radius:var(--radius-lg);font-size:16px;min-height:44px}
.categories-section{padding:0 24px 40px}
.categories-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.category-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;text-align:center;transition:all .3s;cursor:pointer}
.category-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.1);border-color:var(--primary-light)}
.category-icon{font-size:32px;margin-bottom:12px}
.category-card h3{font-size:18px;font-weight:600;color:var(--text);margin-bottom:8px}
.category-card p{font-size:14px;color:var(--text2)}
.tools-section{padding:0 24px 40px}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}

/* MOBILE HOMEPAGE */
@media(max-width:768px){
  body{overflow-x:hidden;max-width:100vw}
  .hero-home{padding:40px 16px 32px}
  .hero-home h1{font-size:24px}
  .stats-bar{grid-template-columns:repeat(2,1fr);gap:12px;max-width:600px;margin:0 auto 32px}
  .stat-card{padding:16px}
  .stat-number{font-size:20px}
  .search-box{margin:0 auto 32px}
  .categories-section{padding:0 16px 32px}
  .categories-grid{grid-template-columns:1fr 1fr;gap:12px}
  .category-card{padding:20px}
  .category-icon{font-size:28px}
  .category-card h3{font-size:16px}
  .tools-section{padding:0 16px 32px}
  .tools-grid{grid-template-columns:1fr 1fr;gap:12px}
}

/* BREADCRUMB */
.breadcrumb{max-width:1100px;margin:0 auto;padding:12px 24px;font-size:13px;color:var(--text2)}
.breadcrumb a{color:var(--text2)}.breadcrumb a:hover{color:var(--primary)}.breadcrumb .sep{margin:0 6px}

/* HERO */
.tool-hero{max-width:1100px;margin:0 auto;padding:28px 24px 20px}
.tool-badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500;background:var(--primary-light);color:var(--primary);padding:4px 12px;border-radius:100px;margin-bottom:12px;border:1px solid #bfdbfe}
.tool-hero h1{font-size:32px;font-weight:700;letter-spacing:-0.5px;margin-bottom:8px;line-height:1.2}
.tool-hero .subtitle{font-size:16px;color:var(--text2)}

/* MOBILE TOOL HERO */
@media(max-width:768px){
  .tool-hero{padding:20px 16px 16px}
  .tool-hero h1{font-size:22px}
  .breadcrumb{padding:8px 16px;font-size:12px}
}

/* LAYOUT */
.main-wrap{max-width:1100px;margin:0 auto;padding:0 24px 80px;display:grid;grid-template-columns:1fr 300px;gap:28px}

/* MOBILE LAYOUT */
@media(max-width:768px){
  .main-wrap{grid-template-columns:1fr;gap:20px;padding:0 16px 40px}
  .sidebar{display:none!important}
}

/* CALC CARD */
.calc-card{background:var(--bg2);border:2px solid var(--border);border-radius:var(--radius-lg);padding:32px;margin-bottom:32px;box-shadow:0 8px 32px rgba(0,0,0,.08);position:relative;overflow:hidden;transition:all .3s cubic-bezier(.4,0,.2,1)}
.calc-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.12);border-color:var(--primary-light)}
.calc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),#60a5fa);border-radius:var(--radius-lg) var(--radius-lg) 0 0}
.calc-card h2{font-size:16px;font-weight:600;color:var(--text2);margin-bottom:20px}
.inputs-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.input-group label{display:block;font-size:13px;font-weight:500;color:var(--text2);margin-bottom:6px}
.input-row{display:flex;gap:8px}
.input-row input,.input-row select{flex:1;background:var(--bg);border:2px solid var(--border);border-radius:var(--radius-lg);color:var(--text);font-size:16px;font-weight:500;padding:14px 18px;outline:none;transition:all .3s cubic-bezier(.4,0,.2,1);font-family:inherit;width:100%;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.input-row input:focus,.input-row select:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.2),0 0 0 12px rgba(37,99,235,.1);background:#fff;transform:scale(1.02)}
.input-row input:hover,.input-row select:hover{border-color:var(--primary-light);box-shadow:0 2px 8px rgba(37,99,235,.1)}
.btn-calc{width:100%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border:none;border-radius:var(--radius-lg);font-size:16px;font-weight:700;padding:16px 28px;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);font-family:inherit;position:relative;overflow:hidden;box-shadow:0 4px 16px rgba(37,99,235,.2);text-transform:uppercase;letter-spacing:.5px;min-height:44px}
.btn-calc::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s cubic-bezier(.4,0,.2,1)}
.btn-calc:hover{background:linear-gradient(135deg,var(--primary-dark),#1a5490);transform:translateY(-2px) scale(1.02);box-shadow:0 8px 24px rgba(37,99,235,.35)}
.btn-calc:hover::before{left:100%}
.btn-calc:active{transform:translateY(0) scale(.98);box-shadow:0 2px 8px rgba(37,99,235,.25)}
.btn-calc:disabled{opacity:.6;cursor:not-allowed;transform:none}
.btn-calc:disabled:hover{background:linear-gradient(135deg,var(--primary),var(--primary-dark));transform:none;box-shadow:0 4px 16px rgba(37,99,235,.2)}

/* MOBILE CALC CARD */
@media(max-width:768px){
  .inputs-grid{grid-template-columns:1fr;gap:12px}
  .calc-card{padding:16px;margin-bottom:20px}
  .input-row input,.input-row select{padding:12px 16px;font-size:16px}
  .btn-calc{padding:14px 24px;font-size:16px;min-height:48px}
}

/* RESULT BOX */
.result-box{background:linear-gradient(135deg,var(--primary-light),#fff);border:2px solid var(--primary-light);border-radius:var(--radius-lg);padding:24px;margin-top:20px;position:relative}
.result-box::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),#60a5fa);border-radius:var(--radius-lg) var(--radius-lg) 0 0}
.result-label{font-size:13px;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}
.result-value{font-size:36px;font-weight:700;color:var(--primary);margin-bottom:8px;line-height:1.2}
.result-desc{font-size:14px;color:var(--text2);margin-bottom:12px}
.result-metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px}
.metric-item{background:var(--bg);padding:12px;border-radius:var(--radius);text-align:center}
.metric-value{font-size:18px;font-weight:600;color:var(--primary);margin-bottom:4px}
.metric-label{font-size:11px;color:var(--text2);text-transform:uppercase;letter-spacing:.05em}

/* MOBILE RESULT BOX */
@media(max-width:768px){
  .result-box{padding:20px 24px}
  .result-value{font-size:28px}
  .result-metrics{grid-template-columns:1fr 1fr}
}

/* CONTENT CARD */
.content-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;margin-bottom:24px;box-shadow:var(--shadow)}
.content-card h2{font-size:22px;font-weight:700;margin-bottom:14px;border-bottom:2px solid var(--primary);padding-bottom:8px;color:var(--primary);display:flex;align-items:center;gap:8px}
.content-card h3{font-size:18px;font-weight:600;margin:24px 0 10px;color:var(--primary-dark)}
.content-card p{color:var(--text2);margin-bottom:16px;line-height:1.7}
.content-card ul{color:var(--text2);padding-left:20px;margin-bottom:16px}
.content-card table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.content-card th{background:var(--bg);font-weight:500;font-size:12px;text-transform:uppercase;letter-spacing:.06em;padding:10px 14px;text-align:left;color:var(--text2);border-bottom:1px solid var(--border)}
.content-card td{padding:10px 14px;border-bottom:1px solid var(--border);color:var(--text2)}
.word-count-badge{background:var(--primary);color:#fff;font-size:11px;font-weight:600;padding:4px 8px;border-radius:100px;text-transform:uppercase;letter-spacing:.05em}
#contentHtml{line-height:1.8}
#contentHtml h2{font-size:20px;margin-bottom:12px}
#contentHtml h3{font-size:16px;margin-bottom:8px}
#contentHtml p{margin-bottom:12px}
#contentHtml ul{margin-bottom:12px}
#contentHtml li{margin-bottom:6px}
#contentHtml table{margin-bottom:16px}
#contentHtml tr:nth-child(even){background:var(--bg)}

/* AI LOADER */
.ai-loader{text-align:center;padding:40px;border:1px dashed var(--border);border-radius:var(--radius-lg);background:var(--bg2);margin-bottom:24px}
.ai-loader p{color:var(--text2);font-size:14px;margin-bottom:16px}
.btn-ai{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:14px;font-weight:600;padding:11px 22px;cursor:pointer;transition:all .2s;font-family:inherit;min-height:44px}
.btn-ai:hover{background:var(--primary-dark);transform:translateY(-1px)}
.loading-wrap{display:none;align-items:center;justify-content:center;gap:10px;margin-top:16px;font-size:14px;color:var(--text2)}
.loading-wrap.show{display:flex}
.spinner{width:18px;height:18px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* RELATED TOOLS */
.related-section{margin-top:40px}
.related-section h2{font-size:20px;font-weight:600;color:var(--text);margin-bottom:20px}
.related-tools .tools-grid{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}

/* MOBILE RELATED TOOLS */
@media(max-width:768px){
  .related-tools .tools-grid{grid-template-columns:1fr 1fr}
}

/* TOOL CARD */
.tool-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;cursor:pointer;transition:all .3s;text-align:center}
.tool-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.1);border-color:var(--primary-light)}
.tool-card-icon{font-size:32px;margin-bottom:12px}
.tool-card h3{font-size:16px;font-weight:600;color:var(--text);margin-bottom:8px}
.tool-card p{font-size:14px;color:var(--text2);margin-bottom:0}

/* SIDEBAR */
.sidebar{display:flex;flex-direction:column;gap:16px}
.sidebar-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px}
.sidebar-card h3{font-size:16px;font-weight:600;color:var(--text);margin-bottom:12px}
.sidebar-links{list-style:none;padding:0}
.sidebar-links li{margin-bottom:8px}
.sidebar-links a{color:var(--text2);font-size:14px;padding:8px 12px;border-radius:6px;display:block;transition:all .15s}
.sidebar-links a:hover{background:var(--primary-light);color:var(--primary)}

/* FOOTER */
footer{background:var(--bg);border-top:1px solid var(--border);padding:40px 24px 20px}
.footer-inner{max-width:1100px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-bottom:24px}
.footer-col h4{font-size:16px;font-weight:600;color:var(--text);margin-bottom:12px}
.footer-col ul{list-style:none;padding:0}
.footer-col li{margin-bottom:8px}
.footer-col a{color:var(--text2);font-size:14px;transition:all .15s}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid var(--border);font-size:13px;color:var(--text2)}

/* MOBILE FOOTER */
@media(max-width:768px){
  footer{padding:32px 16px 16px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer-col h4{font-size:15px}
  .footer-col a{font-size:13px}
  .footer-bottom{font-size:12px}
}

/* SEARCH RESULTS */
.search-results{animation:fadeIn 0.3s ease}
.back-btn{background:var(--primary);color:#fff;border:none;border-radius:var(--radius);padding:12px 24px;font-size:14px;font-weight:500;cursor:pointer;transition:all .3s;margin-top:20px;display:inline-block;min-height:44px}
.back-btn:hover{background:var(--primary-dark);transform:translateY(-1px)}
.search-box input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.12)}

@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* BREADCRUMB */
.breadcrumb{max-width:1100px;margin:0 auto;padding:12px 24px;font-size:13px;color:var(--text2)}
.breadcrumb a{color:var(--text2)}.breadcrumb a:hover{color:var(--primary)}.breadcrumb .sep{margin:0 6px}

/* HERO */
.tool-hero{max-width:1100px;margin:0 auto;padding:28px 24px 20px}
.tool-badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500;background:var(--primary-light);color:var(--primary);padding:4px 12px;border-radius:100px;margin-bottom:12px;border:1px solid #bfdbfe}
.tool-hero h1{font-size:32px;font-weight:700;letter-spacing:-0.5px;margin-bottom:8px;line-height:1.2}
.tool-hero .subtitle{font-size:16px;color:var(--text2)}

/* LAYOUT */
.main-wrap{max-width:1100px;margin:0 auto;padding:0 24px 80px;display:grid;grid-template-columns:1fr 300px;gap:28px}
@media(max-width:768px){.main-wrap{grid-template-columns:1fr;gap:20px;padding:0 16px 40px}.sidebar{display:none}.inputs-grid{grid-template-columns:1fr;gap:12px}.nav-links{display:none}.tool-hero h1{font-size:24px}.hero-home h1{font-size:28px}.calc-card{padding:24px;margin-bottom:20px}.result-box{padding:20px 24px}.result-value{font-size:32px}.btn-calc{padding:14px 24px;font-size:15px}.input-row input,.input-row select{padding:12px 16px;font-size:15px}}

/* CALC CARD */
.calc-card{background:var(--bg2);border:2px solid var(--border);border-radius:var(--radius-lg);padding:32px;margin-bottom:32px;box-shadow:0 8px 32px rgba(0,0,0,.08);position:relative;overflow:hidden;transition:all .3s cubic-bezier(.4,0,.2,1)}
.calc-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.12);border-color:var(--primary-light)}
.calc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),#60a5fa);border-radius:var(--radius-lg) var(--radius-lg) 0 0}
.calc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),#60a5fa)}
.calc-card h2{font-size:16px;font-weight:600;color:var(--text2);margin-bottom:20px}
.inputs-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.input-group label{display:block;font-size:13px;font-weight:500;color:var(--text2);margin-bottom:6px}
.input-row{display:flex;gap:8px}
.input-row input,.input-row select{flex:1;background:var(--bg);border:2px solid var(--border);border-radius:var(--radius-lg);color:var(--text);font-size:16px;font-weight:500;padding:14px 18px;outline:none;transition:all .3s cubic-bezier(.4,0,.2,1);font-family:inherit;width:100%;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.input-row input:focus,.input-row select:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.2),0 0 0 12px rgba(37,99,235,.1);background:#fff;transform:scale(1.02)}
.input-row input:hover,.input-row select:hover{border-color:var(--primary-light);box-shadow:0 2px 8px rgba(37,99,235,.1)}
.input-row input:focus,.input-row select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12);background:#fff}
.btn-calc{width:100%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border:none;border-radius:var(--radius-lg);font-size:16px;font-weight:700;padding:16px 28px;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);font-family:inherit;position:relative;overflow:hidden;box-shadow:0 4px 16px rgba(37,99,235,.2);text-transform:uppercase;letter-spacing:.5px}
.btn-calc::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s cubic-bezier(.4,0,.2,1)}
.btn-calc:hover{background:linear-gradient(135deg,var(--primary-dark),#1a5490);transform:translateY(-2px) scale(1.02);box-shadow:0 8px 24px rgba(37,99,235,.35)}
.btn-calc:hover::before{left:100%}
.btn-calc:active{transform:translateY(0) scale(.98);box-shadow:0 2px 8px rgba(37,99,235,.25)}
.btn-calc:disabled{opacity:.6;cursor:not-allowed;transform:none}
.btn-calc:disabled:hover{background:linear-gradient(135deg,var(--primary),var(--primary-dark));transform:none;box-shadow:0 4px 16px rgba(37,99,235,.2)}

/* RESULT */
.result-box{display:none;margin-top:24px;background:linear-gradient(135deg,var(--primary-light),#e8f4f8);border:2px solid var(--primary);border-radius:var(--radius-lg);padding:28px 32px;box-shadow:0 8px 32px rgba(37,99,235,.15);position:relative;overflow:hidden;animation:slideInScale .4s cubic-bezier(.34,1.56,.64,1)}
.result-box.show{display:block}
.result-box::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary),#60a5fa);border-radius:var(--radius-lg) var(--radius-lg) 0 0}
.result-box::after{content:'';position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),#60a5fa);opacity:.6;border-radius:0 0 var(--radius-lg) var(--radius-lg)}
@keyframes slideInScale{from{opacity:0;transform:translateY(20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.02)}}
.result-label{font-size:13px;color:var(--primary);font-weight:600;letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.result-label::before{content:'📊';font-size:16px}
.result-value{font-size:42px;font-weight:800;color:var(--primary-dark);line-height:1.1;margin-bottom:12px;text-shadow:0 2px 4px rgba(29,78,216,.1);animation:pulse 2s ease-in-out infinite}
.result-desc{font-size:15px;color:var(--primary);line-height:1.6;margin-top:8px;padding-top:12px;border-top:1px solid rgba(37,99,235,.2)}
.result-metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-top:16px}
.metric-item{background:rgba(255,255,255,.1);padding:12px;border-radius:8px;text-align:center}
.metric-label{font-size:11px;color:var(--text2);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px}
.metric-value{font-size:18px;font-weight:600;color:var(--primary)}

/* NEW SECTIONS */
.steps-container{display:grid;grid-template-columns:1fr;gap:20px;margin-top:16px}
.step{display:flex;gap:16px;align-items:flex-start;padding:20px;background:var(--bg);border-radius:var(--radius-lg);border:1px solid var(--border)}
.step-number{background:var(--primary);color:#fff;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0}
.step-content h3{font-size:16px;font-weight:600;color:var(--text);margin-bottom:8px}
.step-content p{color:var(--text2);line-height:1.6}

.formula-box{background:linear-gradient(135deg,var(--bg),var(--primary-light));border:2px solid var(--primary);border-radius:var(--radius-lg);padding:24px;margin-top:16px}
.formula-title{font-size:14px;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:.08em;margin-bottom:16px}
.formula-content p{color:var(--text);line-height:1.6;margin-bottom:16px}
.formula-details{display:grid;gap:12px}
.formula-item{display:flex;flex-direction:column;gap:4px}
.formula-label{font-size:12px;font-weight:600;color:var(--primary);text-transform:uppercase;letter-spacing:.06em}
.formula-equation{font-family:'Courier New',monospace;font-size:16px;color:var(--text);background:var(--bg);padding:8px 12px;border-radius:6px;border:1px solid var(--border)}
.formula-description{color:var(--text2);font-size:14px;line-height:1.5}

.fact-box{background:linear-gradient(135deg,#fff9c6,#fef3c7);border:2px solid #f59e0b;border-radius:var(--radius-lg);padding:20px;margin-top:16px}
.fact-box p{color:var(--text);line-height:1.6;font-size:15px}

.faq-container{display:grid;gap:12px;margin-top:16px}
.faq-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:all .3s}
.faq-item:hover{border-color:var(--primary-light);box-shadow:0 4px 16px rgba(0,0,0,.08)}
.faq-question{margin:0}
.faq-toggle{width:100%;background:none;border:none;padding:16px 20px;text-align:left;font-size:15px;font-weight:500;color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:space-between;transition:all .3s}
.faq-toggle:hover{background:var(--primary-light);color:var(--primary)}
.faq-icon{width:24px;height:24px;background:var(--primary-light);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;transition:all .3s}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px}
.faq-answer.show{max-height:200px;padding:16px 20px}
.faq-answer p{color:var(--text2);line-height:1.6}

.share-container{display:grid;gap:16px;margin-top:16px}
.share-buttons{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:16px}
.share-btn{background:linear-gradient(135deg,var(--bg),var(--bg2));border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;font-size:14px;font-weight:500;color:var(--text);cursor:pointer;transition:all .3s;display:flex;align-items:center;gap:8px}
.share-btn:hover{border-color:var(--primary);background:var(--primary-light);transform:translateY(-1px)}
.share-icon{font-size:18px}
.share-link{margin-top:12px}
.share-link input{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;font-size:14px;color:var(--text2);cursor:pointer}

.focused{border-color:var(--primary)!important;box-shadow:0 0 0 4px rgba(37,99,235,.12)!important}

/* HOMEPAGE ENHANCEMENTS */
.search-results{animation:fadeIn 0.3s ease}
.back-btn{background:var(--primary);color:#fff;border:none;border-radius:var(--radius);padding:12px 24px;font-size:14px;font-weight:500;cursor:pointer;transition:all .3s;margin-top:20px;display:inline-block}
.back-btn:hover{background:var(--primary-dark);transform:translateY(-1px)}
.search-box input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.12)}

@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* CONTENT CARD */
.content-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;margin-bottom:24px;box-shadow:var(--shadow)}
.content-card h2{font-size:22px;font-weight:700;margin-bottom:14px;border-bottom:2px solid var(--primary);padding-bottom:8px;color:var(--primary);display:flex;align-items:center;gap:8px}
.content-card h3{font-size:18px;font-weight:600;margin:24px 0 10px;color:var(--primary-dark)}
.content-card p{color:var(--text2);margin-bottom:16px;line-height:1.7}
.content-card ul{color:var(--text2);padding-left:20px;margin-bottom:16px}
.content-card table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.content-card th{background:var(--bg);font-weight:500;font-size:12px;text-transform:uppercase;letter-spacing:.06em;padding:10px 14px;text-align:left;color:var(--text2);border-bottom:1px solid var(--border)}
.content-card td{padding:10px 14px;border-bottom:1px solid var(--border);color:var(--text2)}
.word-count-badge{background:var(--primary);color:#fff;font-size:11px;font-weight:600;padding:4px 8px;border-radius:100px;text-transform:uppercase;letter-spacing:.05em}
#contentHtml{line-height:1.8}
#contentHtml h2{font-size:20px;margin-bottom:12px}
#contentHtml h3{font-size:16px;margin-bottom:8px}
#contentHtml p{margin-bottom:12px}
#contentHtml ul{margin-bottom:12px}
#contentHtml li{margin-bottom:6px}
#contentHtml table{margin-bottom:16px}
#contentHtml tr:nth-child(even){background:var(--bg)}

/* AI LOADER */
.ai-loader{text-align:center;padding:40px;border:1px dashed var(--border);border-radius:var(--radius-lg);background:var(--bg2);margin-bottom:24px}
.ai-loader p{color:var(--text2);font-size:14px;margin-bottom:16px}
.btn-ai{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:14px;font-weight:600;padding:11px 22px;cursor:pointer;transition:all .2s;font-family:inherit}
.btn-ai:hover{background:var(--primary-dark);transform:translateY(-1px)}
.loading-wrap{display:none;align-items:center;justify-content:center;gap:10px;margin-top:16px;font-size:14px;color:var(--text2)}
.loading-wrap.show{display:flex}
.spinner{width:18px;height:18px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* TOOLS GRID */
.related-section h2{font-size:18px;font-weight:700;margin-bottom:16px}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.tool-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;transition:all .15s;cursor:pointer;box-shadow:var(--shadow)}
.tool-card:hover{border-color:var(--primary);transform:translateY(-2px)}
.tool-card-icon{font-size:22px;margin-bottom:8px;display:block}
.tool-card h3{font-size:14px;font-weight:600;margin-bottom:4px}
.tool-card p{font-size:12px;color:var(--text2);line-height:1.4}

/* SIDEBAR */
.sidebar-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;margin-bottom:20px;box-shadow:var(--shadow)}
.sidebar-card h3{font-size:15px;font-weight:600;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.sidebar-links{list-style:none}
.sidebar-links li{padding:6px 0;border-bottom:1px solid var(--bg)}
.sidebar-links a{font-size:13px;color:var(--text2);display:flex;align-items:center;gap:8px;transition:color .15s}
.sidebar-links a:hover{color:var(--primary)}

/* HOMEPAGE */
.hero-home{background:linear-gradient(135deg,#2563eb 0%,#1e40af 100%);color:#fff;text-align:center;padding:60px 24px}
.hero-home h1{font-size:42px;font-weight:800;letter-spacing:-1px;margin-bottom:14px}
.hero-home p{font-size:18px;opacity:.85;max-width:500px;margin:0 auto 28px}
.search-box{max-width:500px;margin:0 auto;display:flex;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 8px 24px rgba(0,0,0,.15)}
.search-box input{flex:1;border:none;outline:none;padding:14px 20px;font-size:15px;font-family:inherit;color:var(--text)}
.search-box button{background:var(--primary);border:none;color:#fff;padding:14px 24px;font-size:14px;font-weight:600;cursor:pointer;font-family:inherit}
.search-box button:hover{background:var(--primary-dark)}
.stats-bar{background:#fff;border-bottom:1px solid var(--border);padding:14px 24px;display:flex;justify-content:center;gap:48px}
.stat-item{text-align:center}
.stat-num{font-size:22px;font-weight:700;color:var(--primary);line-height:1}
.stat-label{font-size:12px;color:var(--text2)}
.home-section{max-width:1100px;margin:40px auto;padding:0 24px}
.home-section h2{font-size:22px;font-weight:700;margin-bottom:20px}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;margin-bottom:48px}
.cat-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px 16px;text-align:center;transition:all .15s;cursor:pointer;box-shadow:var(--shadow)}
.cat-card:hover{border-color:var(--primary);transform:translateY(-3px)}
.cat-icon{font-size:32px;margin-bottom:10px;display:block}
.cat-name{font-size:14px;font-weight:600;margin-bottom:4px}
.cat-count{font-size:12px;color:var(--text2)}

/* FOOTER */
footer{background:#1a1a2e;color:rgba(255,255,255,.7);padding:40px 24px 24px;margin-top:60px}
.footer-inner{max-width:1100px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:32px;margin-bottom:32px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:12px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:6px}
.footer-col a{font-size:13px;color:rgba(255,255,255,.6);transition:color .15s}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;font-size:13px;text-align:center}