:root{
  --bg:#f9f9f7; --surface:#ffffff; --ink:#0b0b0b; --ink-2:#52514e; --muted:#898781;
  --line:#e1e0d9; --brand:#2a78d6; --brand-dark:#1c5cab; --ok:#006300;
  --radius:12px; --shadow:0 1px 4px rgba(0,0,0,.05), 0 8px 30px rgba(0,0,0,.04);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
a{color:var(--brand)}
h1,h2,h3{line-height:1.25}
img,svg,canvas{max-width:100%}

/* header */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none;margin:0}
.brand span{color:var(--brand)}
.nav-links{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.nav-links a{color:var(--ink-2);text-decoration:none;font-weight:500;font-size:.95rem}
.nav-links a:hover{color:var(--ink)}

/* buttons & forms */
.btn{display:inline-block;background:var(--brand);color:#fff !important;border:none;border-radius:10px;padding:12px 22px;font-size:1rem;font-weight:600;cursor:pointer;text-decoration:none;transition:background .15s}
.btn:hover{background:var(--brand-dark)}
.btn-sm{padding:8px 14px;font-size:.9rem}
.btn-ghost{background:transparent;color:var(--brand) !important;border:1px solid var(--brand)}
.btn-ghost:hover{background:#eef4fc}
input[type=text],input[type=url],input[type=email],input[type=tel],input[type=password],input[type=number],select,textarea{
  width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:1rem;font-family:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}
label{font-weight:600;font-size:.9rem;display:block;margin:12px 0 4px}
.field-row{display:flex;gap:10px;flex-wrap:wrap}
.field-row>*{flex:1;min-width:140px}

/* hero + sections */
.hero{padding:56px 0 30px;text-align:center}
.hero h1{font-size:clamp(1.9rem,4.5vw,3rem);margin:0 0 12px}
.hero .sub{font-size:1.15rem;color:var(--ink-2);max-width:720px;margin:0 auto 8px}
.badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:14px 0 0;padding:0;list-style:none}
.badges li{background:#eef4fc;color:var(--brand-dark);border-radius:999px;padding:5px 14px;font-size:.85rem;font-weight:600}
section{padding:40px 0}
.section-title{text-align:center;font-size:1.7rem;margin:0 0 8px}
.section-sub{text-align:center;color:var(--ink-2);max-width:640px;margin:0 auto 28px}

/* generator card */
.gen{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:24px;margin-top:26px;text-align:left}
@media(max-width:820px){.gen{grid-template-columns:1fr}}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:6px}
.tabs button{background:transparent;border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:.9rem;cursor:pointer;color:var(--ink-2);font-weight:600}
.tabs button.active{background:var(--ink);border-color:var(--ink);color:#fff}
.preview{display:flex;flex-direction:column;align-items:center;gap:14px;justify-content:flex-start;padding-top:8px}
.qr-frame{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;display:grid;place-items:center;min-height:260px;min-width:260px;position:relative}
.qr-frame .cta-label{position:absolute;bottom:-14px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;border-radius:999px;padding:4px 16px;font-weight:700;font-size:.85rem;white-space:nowrap}
.dl-row{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:10px}
.style-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px}
details.adv{margin-top:14px;border-top:1px solid var(--line);padding-top:10px}
details.adv summary{cursor:pointer;font-weight:600;color:var(--ink-2)}
.hint{font-size:.85rem;color:var(--muted);margin:4px 0 0}
.result-box{background:#f2f7f2;border:1px solid #cfe3cf;border-radius:10px;padding:14px;margin-top:14px;word-break:break-all}
.result-box strong{color:var(--ok)}
.copy-row{display:flex;gap:8px;align-items:center;margin:6px 0}
.copy-row code{background:#fff;border:1px solid var(--line);border-radius:8px;padding:6px 10px;flex:1;overflow-x:auto;white-space:nowrap}
.error-box{background:#fdf0f0;border:1px solid #e8c2c2;color:#8c2b2b;border-radius:10px;padding:10px 14px;margin-top:12px}

/* feature grid */
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card h3{margin:0 0 6px;font-size:1.05rem}
.card p{margin:0;color:var(--ink-2);font-size:.95rem}
.card .ico{font-size:1.5rem;margin-bottom:8px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;counter-reset:step}
.step{position:relative;padding:22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-14px;left:18px;background:var(--brand);color:#fff;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:.9rem}

/* FAQ */
.faq{max-width:760px;margin:0 auto}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:10px;margin-bottom:10px;padding:14px 18px}
.faq summary{font-weight:600;cursor:pointer}
.faq p{color:var(--ink-2);margin:10px 0 0}

/* prose (SEO copy) */
.prose{max-width:760px;margin:0 auto;color:var(--ink-2)}
.prose h2{color:var(--ink);font-size:1.35rem}
.prose h3{color:var(--ink);font-size:1.1rem}

/* tables */
table{border-collapse:collapse;width:100%;background:var(--surface);border:1px solid var(--line);border-radius:10px;overflow:hidden}
th,td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:.92rem}
th{background:#f4f4f1;font-weight:700}
tbody tr:last-child td{border-bottom:none}
td{color:var(--ink-2)}
pre{background:#14140f;color:#e8e8e2;border-radius:10px;padding:16px;overflow-x:auto;font-size:.85rem;line-height:1.5}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}

/* footer */
.site-footer{border-top:1px solid var(--line);background:var(--surface);margin-top:40px;padding:36px 0 20px}
.footgrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
@media(max-width:680px){.footgrid{grid-template-columns:1fr}}
.site-footer h3{font-size:.9rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.site-footer a{display:block;color:var(--ink-2);text-decoration:none;padding:3px 0;font-size:.93rem}
.site-footer a:hover{color:var(--brand)}
.muted{color:var(--muted)}
.small{font-size:.85rem;margin-top:24px}

/* manage dashboard */
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:18px 0}
.stat-tile{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.stat-tile .v{font-size:1.9rem;font-weight:800;line-height:1.1}
.stat-tile .l{color:var(--muted);font-size:.85rem;font-weight:600}
.chart-card{background:#fcfcfb;border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:14px 0}
.chart-card h3{margin:0 0 10px;font-size:1rem}
.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:720px){.chart-grid{grid-template-columns:1fr}}
.viz-tooltip{position:fixed;pointer-events:none;background:#0b0b0b;color:#fff;border-radius:8px;padding:6px 10px;font-size:.8rem;z-index:99;display:none;white-space:nowrap}
.hbar-row{display:grid;grid-template-columns:110px 1fr 46px;gap:8px;align-items:center;font-size:.85rem;padding:3px 0}
.hbar-row .lbl{color:var(--ink-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hbar-track{background:transparent;height:14px;border-radius:4px;position:relative}
.hbar-fill{background:#2a78d6;height:100%;border-radius:4px;min-width:2px}
.hbar-row .num{color:var(--ink-2);text-align:right;font-variant-numeric:tabular-nums}
.pill-row{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.pill-row button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 12px;font-size:.85rem;cursor:pointer;color:var(--ink-2);font-weight:600}
.pill-row button.active{background:var(--brand);border-color:var(--brand);color:#fff}
.mng-head{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;margin-top:26px}
.tag{display:inline-block;background:#eef4fc;color:var(--brand-dark);border-radius:6px;padding:2px 8px;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.03em}
.list-item{display:flex;justify-content:space-between;gap:12px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin-bottom:10px;flex-wrap:wrap}