/* ToolHub — shared design system. Navy #1E2A5A, teal #2EC4B6, yellow #FFC93C. No frameworks. */
:root{--navy:#1E2A5A;--navy2:#16224a;--teal:#2EC4B6;--teal-dark:#1da89b;--yellow:#FFC93C;--bg:#f6f8fb;--card:#fff;--text:#1a2333;--muted:#5b6b82;--border:#e2e8f0;--radius:14px;--shadow:0 4px 18px rgba(30,42,90,.08);--shadow-lg:0 12px 32px rgba(30,42,90,.16)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
::selection{background:var(--teal);color:#fff}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--teal-dark);text-decoration:underline}
img{max-width:100%}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
/* Header — sticky, search stays visible on tool pages */
.site-header{background:var(--navy);color:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 12px rgba(0,0,0,.18)}
.site-header .container{display:flex;align-items:center;gap:18px;min-height:60px;flex-wrap:wrap}
.logo{font-size:22px;font-weight:800;color:#fff;letter-spacing:-.3px;white-space:nowrap}
.logo span{color:var(--teal)}
.logo:hover{color:#fff;text-decoration:none}
.main-nav{display:flex;gap:4px;flex-wrap:wrap;margin-left:auto}
.main-nav a{color:#dbe4ff;padding:8px 12px;border-radius:8px;font-size:14px;font-weight:600}
.main-nav a:hover{background:rgba(255,255,255,.12);color:#fff;text-decoration:none}
.header-search{flex:1;min-width:180px;max-width:340px}
.header-search input{width:100%;padding:9px 14px;border-radius:999px;border:0;outline:0;font-size:14px;background:#fff;transition:box-shadow .15s}
.header-search input:focus{box-shadow:0 0 0 3px rgba(46,196,182,.55)}
/* Hero */
.hero{background:linear-gradient(135deg,var(--navy) 0%,#2a3a7a 55%,#1da89b 130%);color:#fff;padding:64px 0 56px;text-align:center}
.hero h1{font-size:clamp(30px,5vw,48px);line-height:1.12;letter-spacing:-.6px;margin-bottom:14px;font-weight:800}
.hero p{color:#dbe4ff;font-size:19px;max-width:680px;margin:0 auto 28px;line-height:1.55}
.hero-search{max-width:680px;margin:0 auto;position:relative}
.hero-search input{width:100%;padding:19px 24px;border-radius:999px;border:0;outline:0;font-size:18px;box-shadow:0 10px 34px rgba(0,0,0,.28);transition:box-shadow .15s}
.hero-search input:focus{box-shadow:0 0 0 4px rgba(46,196,182,.6),0 10px 34px rgba(0,0,0,.28)}
.hero-search input::placeholder{color:#8a97ad}
.hero-search .hint{font-size:13px;color:#cbd8ff;margin-top:12px}
.search-results{position:absolute;left:0;right:0;top:calc(100% + 8px);background:#fff;color:var(--text);border-radius:12px;box-shadow:0 12px 32px rgba(0,0,0,.22);text-align:left;overflow:hidden;display:none;z-index:20}
.search-results a{display:block;padding:11px 16px;border-bottom:1px solid #eef2f7;font-size:15px}
.search-results a:last-child{border-bottom:0}
.search-results a:hover{background:#f0fdfa;text-decoration:none}
.search-results small{color:var(--muted)}
/* Sections — consistent rhythm */
.section{padding:44px 0}
.section + .section{padding-top:8px}
.section h2{font-size:27px;letter-spacing:-.4px;margin-bottom:6px;color:var(--navy);line-height:1.25}
.section .sub{color:var(--muted);margin-bottom:22px;font-size:16px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;display:flex;flex-direction:column;height:100%}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#bfe9e4}
.card h3{font-size:17px;line-height:1.35;margin-bottom:8px;color:var(--navy)}
.card h3 a{color:var(--navy)}
.card h3 a:hover{color:var(--teal-dark);text-decoration:none}
.card p{font-size:14px;line-height:1.55;color:var(--muted);flex:1}
.card .tag{display:inline-block;align-self:flex-start;background:#e6f7f4;color:#0f766e;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;margin-bottom:12px;letter-spacing:.2px}
.card a{font-weight:700}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.cat-card{background:#fff;border:1px solid var(--border);border-top:3px solid var(--teal);border-radius:var(--radius);padding:20px 18px;display:block;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.cat-card:hover{border-color:var(--teal);border-top-color:var(--teal);text-decoration:none;box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.cat-card b{display:block;color:var(--navy);font-size:16px;line-height:1.35;margin-bottom:4px}
.cat-card span{font-size:13px;line-height:1.5;color:var(--muted)}
/* Tool page */
.breadcrumb{font-size:13px;color:var(--muted);padding:18px 0 0}
.breadcrumb a{color:var(--muted)}
.tool-page{max-width:860px;margin:0 auto;padding:0 20px 48px}
.tool-page h1{font-size:clamp(26px,4vw,34px);color:var(--navy);letter-spacing:-.4px;margin:10px 0 8px;line-height:1.2}
.tool-page h2{font-size:22px;color:var(--navy);letter-spacing:-.3px;margin:28px 0 10px;line-height:1.3}
.tool-page .lede{color:var(--muted);font-size:17px;margin-bottom:22px}
.tool-box{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);margin:20px 0}
.tool-box label{display:block;font-weight:700;margin:16px 0 6px;font-size:14px}
.tool-box label:first-child{margin-top:0}
input[type=text],input[type=number],input[type=date],input[type=file],select,textarea{width:100%;padding:12px 14px;border:1px solid #cbd5e1;border-radius:10px;font-size:16px;font-family:inherit;background:#fff;transition:border-color .15s,box-shadow .15s}
textarea{min-height:140px;resize:vertical}
input:hover,select:hover,textarea:hover{border-color:#94a3b8}
input:focus,select:focus,textarea:focus{outline:2px solid var(--teal);border-color:var(--teal)}
.btn{display:inline-block;background:var(--teal);color:#fff;border:0;padding:13px 24px;border-radius:10px;font-size:16px;font-weight:700;cursor:pointer;margin:6px 6px 0 0;transition:background .15s,transform .12s,box-shadow .15s;box-shadow:0 2px 8px rgba(46,196,182,.35)}
.btn:hover{background:var(--teal-dark);box-shadow:0 4px 14px rgba(46,196,182,.45)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible,.btn-ghost:focus-visible,.btn-secondary:focus-visible,.filter-bar button:focus-visible,.related li a:focus-visible{outline:3px solid var(--yellow);outline-offset:2px}
.btn-secondary{background:var(--navy);box-shadow:0 2px 8px rgba(30,42,90,.3)}
.btn-secondary:hover{background:var(--navy2);box-shadow:0 4px 14px rgba(30,42,90,.4)}
.btn-ghost{background:#eef2f7;color:var(--navy);box-shadow:none}
.btn-ghost:hover{background:#e2e8f0;box-shadow:none}
.result-box{background:#f0fdfa;border:1px solid #b8e8e0;border-radius:10px;padding:16px;margin-top:16px;white-space:pre-wrap;word-break:break-word;font-size:15px}
.result-box.big{font-size:22px;font-weight:800;color:var(--navy);text-align:center}
.note{background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:12px 14px;font-size:14px;margin-top:14px}
.muted{color:var(--muted);font-size:14px}
.steps{margin:16px 0 16px 20px}
.steps li{margin-bottom:6px}
.faq{margin-top:32px}
.faq h2{font-size:22px;color:var(--navy);margin-bottom:12px}
.faq details{background:#fff;border:1px solid var(--border);border-radius:10px;padding:14px 16px;margin-bottom:10px;transition:border-color .15s}
.faq details[open]{border-color:#bfe9e4}
.faq summary{font-weight:700;cursor:pointer;color:var(--navy);list-style-position:inside}
.faq p{margin-top:8px;color:var(--muted)}
.related{margin-top:32px}
.related h2{font-size:20px;color:var(--navy);margin-bottom:12px}
.related ul{list-style:none;display:flex;flex-wrap:wrap;gap:10px}
.related li a{display:inline-block;background:#fff;border:1px solid var(--border);border-radius:999px;padding:8px 14px;font-size:14px;font-weight:600;transition:border-color .15s,background .15s}
.related li a:hover{border-color:var(--teal);background:#f0fdfa;text-decoration:none}
/* Footer */
.site-footer{background:var(--navy);color:#cbd8ff;padding:40px 0;margin-top:20px}
.site-footer a{color:#fff}
.site-footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:28px}
.site-footer h4{color:#fff;margin-bottom:10px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:6px;font-size:14px}
.copy{border-top:1px solid rgba(255,255,255,.15);margin-top:28px;padding-top:16px;font-size:13px;color:#9fb0d8;text-align:center}
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.filter-bar button{border:1px solid var(--border);background:#fff;padding:8px 14px;border-radius:999px;cursor:pointer;font-weight:600;font-size:14px;transition:background .15s,color .15s}
.filter-bar button:hover{border-color:var(--teal)}
.filter-bar button.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.az-list{columns:2;column-gap:32px}
.az-list a{display:block;padding:5px 0}
@media(max-width:900px){.cat-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}}
@media(max-width:640px){
.hero{padding:44px 0 36px}
.hero h1{font-size:30px}
.hero p{font-size:17px}
.hero-search input{padding:16px 20px;font-size:16px}
.tool-box{padding:20px}
.site-header .container{flex-direction:column;align-items:stretch;gap:10px;padding-top:12px;padding-bottom:12px}
.logo{text-align:center}
.header-search{max-width:none;width:100%}
.main-nav{order:3;width:100%;padding-bottom:0;justify-content:center;margin-left:0}
.az-list{columns:1}
.grid{grid-template-columns:1fr}
.cat-grid{grid-template-columns:1fr}
.section{padding:32px 0}
.btn{width:100%;margin-right:0;text-align:center}
.tool-box .btn{width:auto}
.tool-box .btn-ghost{width:auto}
}