/* PDF Prem shared stylesheet — mobile-first */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f6f7fb; --surface:#ffffff; --surface-2:#eef1f7;
  --text:#0f172a; --muted:#64748b; --border:#e2e8f0;
  --primary:#6d28d9; --primary-2:#a855f7; --accent:#ec4899;
  --grad:linear-gradient(135deg,#6d28d9,#a855f7 55%,#ec4899);
  --radius:14px; --shadow:0 6px 24px rgba(109,40,217,.10);
  --danger:#dc2626; --success:#16a34a;
}
[data-theme="dark"]{
  --bg:#0b1020; --surface:#131a2e; --surface-2:#1b2440;
  --text:#e8edf7; --muted:#94a3b8; --border:#243052;
  --shadow:0 6px 24px rgba(0,0,0,.35);
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;font-size:16px}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
img,video,canvas{max-width:100%}
a{color:var(--primary)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--surface) 85%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;gap:16px;height:60px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;color:var(--text);text-decoration:none}
.logo-mark{width:38px;height:34px;border-radius:10px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:800;padding:0 3px}
.nav{margin-left:auto;display:flex;gap:16px}
.nav a{color:var(--muted);text-decoration:none;font-weight:600;font-size:.95rem}
.nav a:hover{color:var(--primary)}
.theme-toggle{background:var(--surface-2);border:1px solid var(--border);color:var(--text);width:38px;height:38px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center}

/* breadcrumb */
.breadcrumb{display:flex;align-items:center;gap:8px;padding:14px 16px;font-size:.9rem;color:var(--muted);flex-wrap:wrap}
.breadcrumb a{color:var(--primary);text-decoration:none}

/* ad placeholder */
.ad-slot{border:2px dashed var(--border);border-radius:var(--radius);min-height:90px;display:flex;align-items:center;justify-content:center;color:var(--muted);margin:18px 0;background:var(--surface)}
.ad-slot span{font-size:.8rem;letter-spacing:3px;text-transform:uppercase}

/* hero (homepage) */
.hero{background:var(--grad);color:#fff;text-align:center;padding:60px 16px 54px;border-radius:0 0 28px 28px}
.hero h1{font-size:2.1rem;line-height:1.25;margin-bottom:10px}
.hero p{opacity:.92;max-width:640px;margin:0 auto 22px}
.search-box{max-width:520px;margin:0 auto;position:relative}
.search-box input{width:100%;padding:14px 18px 14px 46px;border:none;border-radius:99px;font-size:1rem;box-shadow:0 8px 30px rgba(0,0,0,.18)}
.search-box svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:#94a3b8}
.chips{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.chip{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);color:#fff;padding:8px 18px;border-radius:99px;cursor:pointer;font-weight:600;font-size:.9rem}
.chip.active{background:#fff;color:var(--primary)}

/* tool grid & cards */
.section-title{margin:34px 0 6px;font-size:1.4rem}
.section-sub{color:var(--muted);margin-bottom:18px}
.tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:18px 0 30px}
.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;text-decoration:none;color:inherit;display:block;transition:transform .15s,box-shadow .15s}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.tool-card h3{font-size:1rem;margin-bottom:6px}
.tool-card p{font-size:.85rem;color:var(--muted);line-height:1.5}
.tool-icon{width:50px;height:50px;border-radius:14px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem;margin-bottom:12px;letter-spacing:.5px}

/* tool page */
.tool-page h1{font-size:1.7rem;margin:6px 0 10px;line-height:1.3}
.intro{color:var(--muted);margin-bottom:20px;max-width:720px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.tool-ui{margin-bottom:8px}
.how-to,.faq,.related{margin:30px 0}
.how-to h2,.faq h2,.related h2{font-size:1.25rem;margin-bottom:14px}
.how-to ol{padding-left:22px;display:grid;gap:8px;color:var(--text)}
.how-to li::marker{color:var(--primary);font-weight:700}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:10px}
.faq summary{padding:14px 16px;cursor:pointer;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq details p{padding:0 16px 14px;color:var(--muted)}

/* forms */
.field{margin-bottom:14px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:.95rem}
.field input[type=text],.field input[type=number],.field input[type=date],.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text);font-size:1rem;font-family:inherit}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--primary-2);border-color:var(--primary)}
input[type=range]{width:100%;accent-color:var(--primary);height:32px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:end}
.row .field{flex:1;min-width:140px}
.check-row{display:flex;align-items:center;gap:8px;margin:8px 0;font-size:.95rem}
.check-row input{width:18px;height:18px;accent-color:var(--primary)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:99px;border:none;font-weight:700;font-size:1rem;cursor:pointer;text-decoration:none;transition:transform .12s,opacity .12s}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 18px rgba(168,85,247,.35)}
.btn-ghost{background:var(--surface-2);color:var(--text);border:1px solid var(--border)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-sm{padding:8px 14px;font-size:.85rem}

/* drop zone */
.drop-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:30px 16px;text-align:center;cursor:pointer;background:var(--surface-2);color:var(--muted);transition:border-color .15s}
.drop-zone.dragover{border-color:var(--primary);background:color-mix(in srgb,var(--primary) 8%,var(--surface-2))}
.drop-zone strong{color:var(--primary)}

/* thumbnails */
.thumb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px;margin-top:14px}
.thumb{position:relative;border-radius:10px;overflow:hidden;border:1px solid var(--border);background:var(--surface-2)}
.thumb img{width:100%;height:90px;object-fit:cover;display:block}
.thumb-actions{display:flex;justify-content:center;gap:4px;padding:4px;background:var(--surface)}
.thumb-actions button{border:none;background:var(--surface-2);color:var(--text);border-radius:6px;padding:3px 8px;cursor:pointer;font-size:.75rem}

/* progress + results */
.progress{height:10px;background:var(--surface-2);border-radius:99px;overflow:hidden;margin:12px 0}
.progress>div{height:100%;background:var(--grad);width:0;transition:width .2s;border-radius:99px}
.result{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-top:16px}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-top:14px}
.stat{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:14px;text-align:center}
.stat b{font-size:1.35rem;display:block;color:var(--primary)}
.stat span{font-size:.82rem;color:var(--muted)}
.muted{color:var(--muted);font-size:.9rem}
.error{color:var(--danger);font-size:.92rem;margin-top:10px}
.success{color:var(--success);font-weight:600}
.copy-btn{cursor:pointer;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:6px 12px;font-size:.85rem;font-weight:600}
.copy-btn:hover{border-color:var(--primary);color:var(--primary)}
.checker{background-image:conic-gradient(#ccc 0 25%,#fff 0 50%,#ccc 0 75%,#fff 0);background-size:20px 20px;border-radius:10px;border:1px solid var(--border)}

/* tabs */
.tabs{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.tab{padding:10px 20px;border-radius:99px;border:1px solid var(--border);background:var(--surface-2);cursor:pointer;font-weight:600;color:var(--muted)}
.tab.active{background:var(--grad);color:#fff;border-color:transparent}

/* tables */
.table-wrap{overflow-x:auto;margin-top:12px}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{padding:10px;border-bottom:1px solid var(--border);text-align:left}
th{color:var(--muted);font-weight:600}

/* info sections (homepage) */
.info-grid{display:grid;gap:14px;margin:10px 0 30px}
.info-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.info-card h2{font-size:1.15rem;margin-bottom:8px}
.info-card p{color:var(--muted);font-size:.95rem}

/* footer */
.site-footer{border-top:1px solid var(--border);margin-top:40px;background:var(--surface)}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;padding:30px 0}
.footer-grid h3{font-size:1rem;margin-bottom:8px}
.footer-grid p{color:var(--muted);font-size:.9rem}
.footer-bottom{text-align:center;padding:16px;color:var(--muted);font-size:.85rem;border-top:1px solid var(--border)}

/* resume / invoice paper */
.print-area{background:#fff;color:#111;border-radius:8px;padding:28px;margin-top:16px;border:1px solid var(--border)}
.print-area h2{font-size:1.3rem}
.resume-head{border-bottom:3px solid #6d28d9;padding-bottom:10px;margin-bottom:14px}
.resume-head p{color:#444;font-size:.9rem}
.print-area h4{margin:14px 0 6px;color:#6d28d9;text-transform:uppercase;font-size:.85rem;letter-spacing:1px}
.print-area ul{padding-left:20px;font-size:.92rem}
.inv-table{width:100%;margin:12px 0}
.inv-head{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:12px}
.inv-totals{text-align:right;font-size:.95rem}
.inv-totals b{font-size:1.1rem}

/* typing test */
.typing-box{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:18px;font-size:1.15rem;line-height:2;margin-bottom:14px}
.typing-box .done{color:var(--success)}
.typing-box .current{background:color-mix(in srgb,var(--primary) 20%,transparent);border-radius:4px}
.typing-box .wrong{color:var(--danger);background:color-mix(in srgb,var(--danger) 12%,transparent);border-radius:4px}
.typing-input{width:100%;padding:12px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text);font-size:1rem}

/* strength meter */
.strength{height:8px;border-radius:99px;background:var(--surface-2);margin-top:8px;overflow:hidden}
.strength>div{height:100%;width:0;border-radius:99px;transition:width .2s,background .2s}

/* print */
@media print{
  body.print-mode .site-header,body.print-mode .breadcrumb,body.print-mode .ad-slot,
  body.print-mode .how-to,body.print-mode .faq,body.print-mode .related,
  body.print-mode .site-footer,body.print-mode .no-print{display:none!important}
  body.print-mode{background:#fff}
  body.print-mode .print-area{border:none;box-shadow:none;margin:0;padding:0}
}

@media(min-width:640px){
  .tool-grid{grid-template-columns:repeat(3,1fr)}
  .hero h1{font-size:2.6rem}
  .tool-page h1{font-size:2rem}
}
@media(min-width:960px){
  .tool-grid{grid-template-columns:repeat(4,1fr)}
  .info-grid{grid-template-columns:repeat(3,1fr)}
}

/* batch B/C/D/E supplementary classes */
.form-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.note,.note-box{background:color-mix(in srgb,var(--primary) 7%,var(--surface));border:1px solid var(--border);border-left:4px solid var(--primary);border-radius:10px;padding:12px 14px;font-size:.92rem;color:var(--muted);margin:12px 0}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin-top:12px}
.swatch{width:100%;height:90px;border-radius:12px;border:1px solid var(--border);margin:10px 0}
.color-rows{display:grid;gap:8px;margin-top:10px}
.color-row{display:flex;align-items:center;gap:10px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:8px 12px;font-family:ui-monospace,monospace;font-size:.92rem}
.color-row code{flex:1}
.shades{display:grid;grid-template-columns:repeat(9,1fr);gap:6px;margin-top:10px}
.shade{height:38px;border-radius:8px;cursor:pointer;border:1px solid var(--border)}
.preview-col{display:grid;gap:10px;margin-top:12px}
.subheading{font-size:1.05rem;margin:16px 0 8px}
.donut{width:130px;height:130px;border-radius:50%;margin:14px auto}
.legend{display:flex;gap:16px;justify-content:center;font-size:.88rem;color:var(--muted);flex-wrap:wrap}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:6px}
.bar-wrap{background:var(--surface-2);border-radius:99px;overflow:hidden;height:22px;margin-top:10px;display:flex}
.bar-wrap>div{height:100%}
.big-number{font-size:2.2rem;font-weight:800;color:var(--primary);text-align:center}
.cat-label{text-align:center;font-weight:700;font-size:1.05rem;margin-top:6px}
.bmi-scale{position:relative;height:14px;border-radius:99px;background:linear-gradient(90deg,#3b82f6 0%,#3b82f6 18.5%,#16a34a 18.5%,#16a34a 25%,#f59e0b 25%,#f59e0b 30%,#dc2626 30%,#dc2626 100%);margin:26px 6px 8px}
.bmi-marker{position:absolute;top:-8px;width:4px;height:30px;background:var(--text);border-radius:2px;transform:translateX(-50%)}
.rec-dot{width:12px;height:12px;border-radius:50%;background:var(--danger);display:inline-block;animation:blink 1s infinite}
@keyframes blink{50%{opacity:.25}}
.timer{font-size:1.6rem;font-weight:800;font-variant-numeric:tabular-nums}
.qr-out{display:flex;justify-content:center;padding:16px;background:#fff;border-radius:12px;margin-top:12px}
.qr-out img,.qr-out canvas{image-rendering:pixelated}
@media(min-width:720px){.split{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}}

.logo-heart{width:16px;height:16px;fill:#ff2d55;flex:none;margin:0 2px;filter:drop-shadow(0 1px 2px rgba(0,0,0,.3))}

/* Legal pages + footer links */
.footer-links{margin-top:.45rem;font-size:.85rem}
.footer-links a{color:var(--muted);text-decoration:none}
.footer-links a:hover{color:var(--primary);text-decoration:underline}
.legal h2{margin:1.5rem 0 .5rem;font-size:1.15rem}
.legal p,.legal li{line-height:1.65}
.legal ul{margin:.5rem 0 .8rem;padding-left:1.25rem}
.legal li{margin:.3rem 0}

.logo-img{height:38px;width:auto;display:block;border-radius:10px}

/* App download button */
.app-download{margin-top:20px;display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}
.app-btn{display:inline-flex;align-items:center;gap:8px;background:#fff;color:#6d28d9;font-weight:800;padding:13px 28px;border-radius:14px;text-decoration:none;font-size:1.05rem;box-shadow:0 4px 16px rgba(0,0,0,.18);transition:transform .15s}
.app-btn:hover{transform:translateY(-2px)}
.app-download span{color:rgba(255,255,255,.9);font-size:.92rem}