/* FreeQrly v1.0 — "Mist" theme */
:root{
  --bg:#EDF0F3; --card:#FFFFFF; --ink:#22303F; --soft:#71808F;
  --line:#DCE2E9; --deep:#2F4A62; --deep2:#243B52; --gold:#B9975B;
  --field:#EDF0F3;
  --shadow:0 20px 55px rgba(47,74,98,.10), 0 3px 12px rgba(47,74,98,.06);
  --preview-bg:linear-gradient(160deg,#F7F9FB,#E9EEF3);
}
[data-theme="dark"]{
  --bg:#0E141B; --card:#16212D; --ink:#E6EDF4; --soft:#8FA1B3;
  --line:#243342; --deep:#7FA8CC; --deep2:#9CC0DE; --gold:#C9A96A;
  --field:#0E141B;
  --shadow:0 20px 55px rgba(0,0,0,.45), 0 3px 12px rgba(0,0,0,.3);
  --preview-bg:linear-gradient(160deg,#182635,#101A25);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
.wrap{max-width:1120px;margin:0 auto;padding:0 30px}
/* header */
header.top{padding:26px 0 10px;display:flex;justify-content:space-between;align-items:center;gap:16px}
.brand{font-family:Georgia,"Times New Roman",serif;font-size:24px;letter-spacing:.02em}
.brand em{font-style:italic;color:var(--deep)}
.tnav{font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--soft);display:flex;gap:26px}
.tnav a{color:inherit;text-decoration:none}
.tnav a:hover{color:var(--deep)}
.topbtns{display:flex;gap:8px}
.tbtn{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:7px 14px;font-size:12.5px;font-weight:600;cursor:pointer;transition:border-color .15s}
.tbtn:hover{border-color:var(--deep)}
.topline{height:1px;background:var(--line);margin-top:14px}
/* hero */
.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:50px;padding:70px 0 56px;align-items:center}
.kicker{font-size:12px;letter-spacing:.3em;text-transform:uppercase;color:var(--gold);margin-bottom:22px;font-weight:600}
h1{font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:clamp(38px,4.8vw,58px);line-height:1.18;letter-spacing:.005em}
h1 em{color:var(--deep)}
.lede{margin-top:22px;font-size:16.5px;line-height:1.7;color:var(--soft);max-width:480px}
.herocard{background:var(--card);border-radius:22px;box-shadow:var(--shadow);padding:32px 30px;border:1px solid var(--line)}
.herocard .row{display:flex;justify-content:space-between;align-items:baseline;padding:13px 0;border-bottom:1px solid var(--line);font-size:14.5px}
.herocard .row:last-child{border-bottom:none}
.herocard .k{color:var(--soft)}
.herocard .v{font-weight:700}
.herocard .v.ok{color:var(--deep)}
/* studio */
.studio{background:var(--card);border-radius:28px;box-shadow:var(--shadow);padding:44px;margin:10px 0;border:1px solid var(--line)}
.shead{margin-bottom:28px}
.shead .over{font-size:11.5px;letter-spacing:.3em;text-transform:uppercase;color:var(--gold);font-weight:600;margin-bottom:10px}
.shead h2{font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:31px}
.grid{display:grid;grid-template-columns:1fr 350px;gap:44px}
.types{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:6px}
.types button{border:1px solid var(--line);background:var(--field);border-radius:14px;padding:12px 6px;font-family:inherit;font-size:13.5px;font-weight:600;color:var(--soft);cursor:pointer;transition:all .16s}
.types button small{display:block;font-size:10.5px;font-weight:400;margin-top:3px;letter-spacing:.04em}
.types button:hover{border-color:var(--deep);color:var(--deep)}
.types button.on{background:var(--deep);border-color:var(--deep);color:#fff}
[data-theme="dark"] .types button.on{color:#0E141B}
.types button.on small{opacity:.75}
.fl{font-size:11.5px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--soft);margin:22px 0 9px}
input[type=text],textarea,select{width:100%;border:1px solid var(--line);background:var(--field);border-radius:14px;padding:13px 15px;font-size:15px;font-family:inherit;color:var(--ink);outline:none;transition:border-color .15s,box-shadow .15s,background .15s}
input:focus,textarea:focus,select:focus{border-color:var(--deep);box-shadow:0 0 0 4px rgba(47,74,98,.12);background:var(--card)}
textarea{min-height:68px;resize:vertical}
.r2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.colorbox{display:flex;align-items:center;gap:12px;background:var(--field);border:1px solid var(--line);border-radius:14px;padding:9px 14px}
input[type=color]{width:42px;height:30px;border:1px solid var(--line);border-radius:8px;background:var(--card);padding:2px;cursor:pointer}
.hex{font-size:12.5px;color:var(--soft);font-variant-numeric:tabular-nums}
input[type=range]{width:100%;accent-color:var(--deep)}
.filebtn{display:inline-block;border:1px solid var(--line);background:var(--field);border-radius:14px;padding:12px 20px;font-size:13.5px;font-weight:600;color:var(--soft);cursor:pointer}
.filebtn:hover{border-color:var(--deep);color:var(--deep)}
.hint{font-size:12.5px;color:var(--mut);margin-top:6px;opacity:.9}
.privnote{margin-top:18px;font-size:13px;line-height:1.65;color:var(--soft);background:var(--field);border:1px dashed var(--line);border-radius:14px;padding:12px 16px}
/* batch */
.batchActions{display:flex;gap:10px;margin:14px 0}
.btn-solid{background:var(--deep);color:#fff;border:none;border-radius:14px;padding:13px 26px;font-family:inherit;font-size:14.5px;font-weight:700;cursor:pointer}
[data-theme="dark"] .btn-solid{color:#0E141B}
.btn-solid:hover{filter:brightness(1.08)}
.btn-solid:disabled{opacity:.45;cursor:default}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink);border-radius:14px;padding:13px 26px;font-family:inherit;font-size:14.5px;font-weight:700;cursor:pointer}
.btn-ghost:disabled{opacity:.45;cursor:default}
.batchGrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;margin-top:6px}
.bcell{background:var(--field);border:1px solid var(--line);border-radius:14px;padding:12px;text-align:center}
.bcell .bqr{background:#fff;border-radius:8px;padding:8px;margin-bottom:8px}
.bcell .bqr canvas,.bcell .bqr svg{width:100%;height:auto;display:block}
.bcell .blabel{font-size:11.5px;color:var(--soft);word-break:break-all;margin-bottom:8px;min-height:2.2em}
.bcell button{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;padding:7px 14px;font-size:12.5px;font-weight:700;cursor:pointer;font-family:inherit}
/* preview */
.previewCol{background:var(--preview-bg);border-radius:22px;padding:32px 26px;display:flex;flex-direction:column;align-items:center;gap:18px;border:1px solid var(--line);align-self:start;position:sticky;top:20px}
.qrpaper{background:#fff;border-radius:18px;padding:24px;box-shadow:0 14px 36px rgba(47,74,98,.14)}
#qrbox{width:236px;height:236px;display:flex;align-items:center;justify-content:center}
#qrbox canvas,#qrbox svg{max-width:100%;max-height:100%}
.livenote{font-family:Georgia,"Times New Roman",serif;font-style:italic;font-size:13.5px;color:var(--soft);text-align:center}
.dlrow{display:flex;gap:10px;width:100%}
.dlrow button{flex:1;border-radius:14px;padding:14px 0;font-family:inherit;font-size:14.5px;font-weight:700;cursor:pointer;transition:transform .15s,box-shadow .15s}
#dlPng{background:var(--deep);color:#fff;border:none;box-shadow:0 10px 24px rgba(47,74,98,.28)}
[data-theme="dark"] #dlPng{color:#0E141B}
#dlPng:hover{transform:translateY(-2px)}
#dlSvg{background:var(--card);border:1px solid var(--line);color:var(--deep)}
#dlSvg:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(47,74,98,.12)}
/* principles */
.prins{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:70px 0 10px}
.prin{background:var(--card);border-radius:22px;padding:32px 30px;border:1px solid var(--line);box-shadow:0 12px 32px rgba(47,74,98,.07)}
.prin .no{font-family:Georgia,serif;font-style:italic;color:var(--gold);font-size:15px;margin-bottom:14px;letter-spacing:.1em}
.prin h3{font-family:Georgia,serif;font-weight:400;font-size:21px;margin-bottom:10px}
.prin p{font-size:14.5px;line-height:1.7;color:var(--soft)}
/* faq */
.faq{max-width:700px;margin:70px auto 30px}
.faq h2{font-family:Georgia,serif;font-weight:400;font-size:32px;text-align:center;margin-bottom:28px}
details{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 24px;margin-bottom:12px}
summary{font-weight:700;font-size:15.5px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"＋";color:var(--deep);font-weight:400;flex-shrink:0}
details[open] summary::after{content:"－"}
details p{margin-top:10px;font-size:14.5px;line-height:1.7;color:var(--soft)}
footer{margin-top:40px;padding:36px 0 50px;text-align:center}
footer .fin{font-family:Georgia,serif;font-style:italic;color:var(--soft);font-size:14px}
footer .rule{width:44px;height:1px;background:var(--gold);margin:18px auto}
footer .tiny{font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:var(--soft)}
/* responsive */
@media(max-width:960px){
  .hero{grid-template-columns:1fr;gap:34px;padding:52px 0 44px}
  .grid{grid-template-columns:1fr}
  .previewCol{position:static;order:-1}
  .studio{padding:30px 22px}
}
@media(max-width:820px){.prins{grid-template-columns:1fr}.prins{margin:52px 0 10px}}
@media(max-width:640px){
  .wrap{padding:0 18px}
  header.top{padding:18px 0 8px}
  .brand{font-size:21px}
  .tnav{display:none}
  .kicker{font-size:11px;letter-spacing:.18em;margin-bottom:16px}
  h1{font-size:clamp(34px,9.5vw,44px)}
  .lede{font-size:15.5px}
  .hero{padding:38px 0 32px}
  .herocard{padding:22px}
  .studio{padding:26px 18px;border-radius:22px;margin:6px 0}
  .shead h2{font-size:26px}
  .types{grid-template-columns:repeat(2,1fr);gap:8px}
  .types button{padding:14px 6px}
  .r2{grid-template-columns:1fr}
  .previewCol{padding:24px 18px;border-radius:18px}
  #qrbox{width:210px;height:210px}
  .qrpaper{padding:18px}
  input[type=text],textarea,select{font-size:16px;padding:14px 15px}
  .dlrow button{padding:15px 0}
  .faq{margin:52px auto 24px}
  .faq h2{font-size:26px}
  details{padding:18px}
  summary{font-size:15px}
  .batchGrid{grid-template-columns:repeat(2,1fr);gap:10px}
  footer{padding:28px 0 40px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}