/* ============================================================
   QRBloom — styles
   ============================================================ */
:root{
  --bg:#f6f7fb; --bg-soft:#fff; --card:#fff; --card-2:#f1f3f9;
  --text:#1a1c27; --text-soft:#5b6072; --text-dim:#8a8fa3; --border:#e6e8f0;
  --accent:#6366f1; --accent-2:#8b5cf6; --accent-3:#ec4899; --ok:#10b981;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --shadow:0 1px 2px rgba(20,22,40,.04),0 8px 24px rgba(20,22,40,.06);
  --shadow-lg:0 12px 40px rgba(20,22,40,.12);
  --radius:18px; --maxw:1080px;
}
[data-theme="dark"]{
  --bg:#0c0e16; --bg-soft:#11131e; --card:#161927; --card-2:#1d2132;
  --text:#eef0f8; --text-soft:#aab0c6; --text-dim:#7a8099; --border:#262b3d;
  --accent:#818cf8; --accent-2:#a78bfa; --accent-3:#f472b6;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.35);
  --shadow-lg:0 16px 50px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--sans);color:var(--text);line-height:1.55;
  background:
    radial-gradient(1100px 560px at 82% -10%, color-mix(in srgb,var(--accent-2) 16%,transparent),transparent 60%),
    radial-gradient(900px 480px at -10% 0%, color-mix(in srgb,var(--accent-3) 12%,transparent),transparent 55%),
    var(--bg);
  background-attachment:fixed;-webkit-font-smoothing:antialiased;
}
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:22px}
a{color:var(--accent)}
.skip-link{position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;padding:10px 16px;border-radius:8px;z-index:100}
.skip-link:focus{left:12px;top:12px}

/* Header */
.site-header{position:sticky;top:0;z-index:40;backdrop-filter:saturate(140%) blur(12px);background:color-mix(in srgb,var(--bg-soft) 75%,transparent);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:14px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:1.15rem;letter-spacing:-.02em}
.brand-mark{font-size:1.35rem;line-height:1}
.header-actions{display:flex;align-items:center;gap:10px}
.lang-select{appearance:none;-webkit-appearance:none;border:1px solid var(--border);background:var(--card);color:var(--text);border-radius:12px;padding:9px 30px 9px 12px;font-family:var(--sans);font-size:.88rem;font-weight:600;cursor:pointer;height:40px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a8fa3' stroke-width='3' stroke-linecap='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center}
.theme-toggle{width:40px;height:40px;border-radius:12px;border:1px solid var(--border);background:var(--card);cursor:pointer;font-size:1.1rem;display:grid;place-items:center;transition:background .2s ease}
.theme-toggle:hover{background:var(--card-2)}

/* Hero */
.hero{text-align:center;padding:clamp(36px,7vw,72px) 22px 12px}
.hero h1{font-size:clamp(2rem,5.5vw,3.4rem);line-height:1.06;letter-spacing:-.03em;margin:0 0 14px;font-weight:800}
.grad{background:linear-gradient(110deg,var(--accent),var(--accent-2) 45%,var(--accent-3));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{max-width:560px;margin:0 auto;color:var(--text-soft);font-size:clamp(1rem,2.2vw,1.12rem)}

/* App layout */
.app{padding:28px 22px 8px}
.app-grid{display:grid;gap:20px;grid-template-columns:1fr 0.85fr;align-items:start;max-width:var(--maxw);margin-inline:auto}
@media(max-width:820px){.app-grid{grid-template-columns:1fr}}
.panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}

/* Tabs */
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.tab{border:1px solid var(--border);background:var(--card-2);color:var(--text-soft);padding:8px 14px;border-radius:10px;font-weight:600;font-size:.88rem;cursor:pointer;font-family:var(--sans);transition:all .15s ease}
.tab:hover{color:var(--text)}
.tab.active{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border-color:transparent}

/* Fields */
.field{margin-bottom:14px}
.field-row{display:flex;gap:12px;flex-wrap:wrap}
.field-row .field{flex:1;min-width:140px}
label.lbl{display:block;font-size:.78rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--text-dim);margin-bottom:6px}
.input,.select,textarea.input{width:100%;border:1px solid var(--border);background:var(--bg-soft);color:var(--text);border-radius:11px;padding:11px 13px;font-family:var(--sans);font-size:.98rem;transition:border-color .15s ease}
.input:focus,.select:focus,textarea.input:focus{outline:none;border-color:var(--accent)}
textarea.input{resize:vertical;min-height:84px;line-height:1.5}
.select{appearance:none;-webkit-appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a8fa3' stroke-width='3' stroke-linecap='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:34px}
.check{display:flex;align-items:center;gap:9px;color:var(--text-soft);font-size:.92rem;font-weight:500;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--accent)}
input[type="color"]{width:46px;height:40px;padding:3px;border:1px solid var(--border);border-radius:10px;background:var(--bg-soft);cursor:pointer}
.color-row{display:flex;align-items:center;gap:10px}
.color-row .hexv{font-family:var(--mono);font-size:.86rem;color:var(--text-soft)}

.options-title{font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);margin:20px 0 12px}

/* Preview panel */
.preview-wrap{position:sticky;top:84px}
.qr-stage{display:grid;place-items:center;background:var(--card-2);border:1px solid var(--border);border-radius:14px;padding:22px;min-height:240px}
#qrCanvas{width:100%;max-width:300px;height:auto;image-rendering:pixelated;border-radius:6px;box-shadow:var(--shadow)}
.qr-empty{color:var(--text-dim);font-style:italic;text-align:center}
.dl-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--border);background:var(--card-2);color:var(--text);padding:11px 14px;border-radius:11px;font-weight:600;font-size:.9rem;cursor:pointer;font-family:var(--sans);transition:all .15s ease;text-decoration:none}
.btn:hover{border-color:var(--accent);transform:translateY(-1px)}
.btn svg{width:16px;height:16px}
.btn-primary{grid-column:1 / -1;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border-color:transparent}
.btn-primary:hover{filter:brightness(1.07);color:#fff}
.btn.copied{color:var(--ok);border-color:var(--ok)}

/* Content + FAQ */
.content{max-width:780px;margin-inline:auto;padding:56px 22px 8px}
.eyebrow{display:inline-block;font-size:.74rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent);padding:4px 12px;border-radius:999px;margin-bottom:14px}
.content h2{font-size:clamp(1.5rem,4vw,2.1rem);letter-spacing:-.02em;margin:0 0 12px}
.content h3{font-size:1.12rem;margin:24px 0 8px}
.content p{color:var(--text-soft);line-height:1.75;margin:0 0 14px}
.content code{font-family:var(--mono);font-size:.88em;background:var(--card-2);border:1px solid var(--border);border-radius:6px;padding:1px 6px}
.faq{padding-top:36px}
.faq-item{border:1px solid var(--border);border-radius:14px;background:var(--card);margin-bottom:10px;overflow:hidden}
.faq-item[open]{border-color:color-mix(in srgb,var(--accent) 40%,var(--border))}
.faq-item summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:600;display:flex;justify-content:space-between;align-items:center;gap:14px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--accent);font-size:1.4rem;line-height:1}
.faq-item[open] summary::after{content:"\2212"}
.faq-a{padding:0 18px 18px;color:var(--text-soft);line-height:1.7}
.faq-a p{margin:0}

/* Doc pages */
.doc h3{margin:26px 0 8px}.doc p{color:var(--text-soft);line-height:1.7;margin:0 0 12px}
.doc ul{color:var(--text-soft);line-height:1.7;padding-left:1.25em}.doc li{margin-bottom:8px}
.doc-meta{font-size:.88rem;color:var(--text-dim);margin:0 0 14px}
.content a{text-decoration:underline;text-underline-offset:2px}

/* Footer */
.site-footer{margin-top:44px;border-top:1px solid var(--border);padding:26px 0}
.footer-nav{display:flex;gap:8px 22px;justify-content:center;flex-wrap:wrap;margin-bottom:12px}
.footer-nav a{color:var(--text-soft);text-decoration:none;font-size:.88rem;font-weight:600}
.footer-nav a:hover{color:var(--accent)}
.site-footer p{text-align:center;color:var(--text-dim);font-size:.85rem;margin:0}

/* Toast */
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:var(--text);color:var(--bg);padding:11px 20px;border-radius:12px;font-size:.88rem;font-weight:600;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;z-index:80}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto}}