:root{
  --bg:#f6f8fb;
  --surface:#ffffff;
  --surface2:#fbfcfe;
  --text:#101828;
  --muted:#475467;
  --border:#e4e7ec;
  --shadow: 0 6px 18px rgba(16,24,40,.08);
  --shadow2: 0 2px 8px rgba(16,24,40,.06);
  --brand:#0b5fff;
  --brand2:#0046d1;
  --focus: rgba(11,95,255,.18);
  --radius: 12px;
  --radius2: 10px;
  --max: 1120px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

html[data-theme="dark"]{
  --bg:#0b1220;
  --surface:#0f1a31;
  --surface2:#0c162b;
  --text:#e8eefc;
  --muted:#a6b6dc;
  --border: rgba(255,255,255,.12);
  --shadow: 0 10px 28px rgba(0,0,0,.35);
  --shadow2: 0 6px 18px rgba(0,0,0,.28);
  --brand:#4aa3ff;
  --brand2:#7fd0ff;
  --focus: rgba(74,163,255,.20);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}

a{ color: var(--brand2); text-decoration:none; }
a:hover{ text-decoration: underline; text-underline-offset: 3px; }

.container{ max-width: var(--max); margin: 0 auto; padding: 22px 16px 34px; }

.header{
  position: sticky;
  top:0;
  z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
html[data-theme="dark"] .header{
  background: var(--surface);
}

.header .inner{
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 14px;
}

.brand{
  display:flex;
  align-items:center;
  gap: 12px;
  min-width: 180px;
  color: inherit;
}
.logo{
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--brand);
  color: #ffffff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight: 900;
  letter-spacing: .2px;
  font-size: 12px;
  line-height: 1.05;
  text-align:center;
  box-shadow: var(--shadow2);
  flex: 0 0 auto;
}
.brand h1{
  margin:0;
  font-size: 16px;
  letter-spacing: -0.1px;
}
.brand .sub{
  margin:0;
  font-size: 12px;
  color: var(--muted);
}

.nav{
  display:flex;
  align-items:center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav a{
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  font-weight: 650;
  font-size: 13px;
}
.nav a:hover{
  border-color: var(--border);
  background: var(--surface2);
  color: var(--text);
  text-decoration: none;
}
.nav a.active{
  background: rgba(11,95,255,.10);
  border-color: rgba(11,95,255,.18);
  color: var(--text);
}
html[data-theme="dark"] .nav a.active{
  background: rgba(74,163,255,.14);
  border-color: rgba(74,163,255,.26);
}

.header-right{
  display:flex;
  align-items:center;
  gap: 10px;
}

button, .button{
  appearance:none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor:pointer;
  font-weight: 750;
  letter-spacing: .1px;
  box-shadow: none;
}
button:hover, .button:hover{
  background: var(--surface2);
}
button:focus, .button:focus, input:focus, textarea:focus, select:focus{
  outline: none;
  box-shadow: 0 0 0 4px var(--focus);
  border-color: rgba(11,95,255,.35);
}
html[data-theme="dark"] button:focus,
html[data-theme="dark"] .button:focus,
html[data-theme="dark"] input:focus,
html[data-theme="dark"] textarea:focus,
html[data-theme="dark"] select:focus{
  border-color: rgba(74,163,255,.35);
}

button.primary, .button.primary{
  border-color: transparent;
  background: var(--brand);
  color: #ffffff;
}
button.primary:hover, .button.primary:hover{
  background: var(--brand2);
}

button.danger{
  background: rgba(240,68,56,.08);
  border-color: rgba(240,68,56,.22);
}
button:disabled{
  opacity: .6;
  cursor: not-allowed;
}

.hero{ padding: 14px 0 6px; }
.hero h2{
  margin:0;
  font-size: clamp(22px, 3.2vw, 34px);
  letter-spacing: -0.4px;
}
.hero p{ margin: 10px 0 0; color: var(--muted); max-width: 78ch; }

.badge{
  display:inline-flex;
  align-items:center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
}

.grid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 18px;
  margin-top: 16px;
}
@media (max-width: 980px){ .grid{ grid-template-columns: 1fr; } }

.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card .card-inner{ padding: 16px; }

.card h3{ margin: 0 0 8px; font-size: 16px; }
.muted{ color: var(--muted); font-size: 13px; }

.field{ display:flex; flex-direction: column; gap: 7px; margin-top: 12px; }
label{ font-size: 13px; color: var(--muted); font-weight: 650; }

input[type="text"], input[type="number"], select, textarea{
  width:100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
textarea{ min-height: 92px; resize: vertical; }

.row{ display:grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 520px){ .row{ grid-template-columns: 1fr; } }

.inline{ display:flex; gap: 10px; align-items:center; flex-wrap: wrap; }
.checkbox{
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
}
.checkbox input{ width:18px; height:18px; }

.btns{ display:flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }

.help{
  margin-top: 10px;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--muted);
  font-size: 13px;
}

.notice{
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(18,183,106,.28);
  background: rgba(18,183,106,.08);
  color: var(--text);
  font-size: 13px;
  display:none;
}
.notice.error{
  border-color: rgba(240,68,56,.30);
  background: rgba(240,68,56,.10);
}

.preview{
  display:flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  padding: 14px;
}
.qr-box{
  width: 320px;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--surface2);
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
}
.qr-box > div{ width:100%; height:100%; display:flex; align-items:center; justify-content:center; }

.small{
  font-size: 12px;
  color: var(--muted);
  text-align:center;
  max-width: 54ch;
}

.footer{
  border-top: 1px solid var(--border);
  margin-top: 22px;
  background: var(--surface);
}
.footer .inner{
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 16px 28px;
  color: var(--muted);
  font-size: 12px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
}

.progress{ width:100%; margin-top: 12px; display:none; }
.progress .bar{
  height: 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface2);
  overflow: hidden;
}
.progress .bar > div{
  height:100%;
  width:0%;
  background: var(--brand);
  border-radius: 999px;
  transition: width .15s ease;
}
.progress .text{
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
  display:flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.flap-container{
  margin-top: 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  max-height: 0;
  transition: max-height .25s ease;
}
.flap-container.open{ max-height: 900px; }
.flap-content{ padding: 12px 12px; color: var(--muted); font-size: 13px; }

hr.sep{ border:0; border-top: 1px solid var(--border); margin: 14px 0; }


.qr-list{
  width: 100%;
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
@media (max-width: 980px){
  .qr-list{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 520px){
  .qr-list{ grid-template-columns: 1fr; }
}
.qr-item{
  border: 1px solid var(--border);
  background: var(--surface2);
  border-radius: 14px;
  padding: 10px;
  display:flex;
  flex-direction: column;
  gap: 8px;
}
.qr-thumb{
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
}
.qr-thumb > div{
  width:100%;
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
}
.qr-meta{
  display:flex;
  flex-direction: column;
  gap: 4px;
}
.qr-meta .name{
  font-size: 12px;
  font-weight: 750;
  color: var(--text);
  word-break: break-word;
}
.qr-meta .data{
  font-size: 11px;
  color: var(--muted);
  word-break: break-word;
  max-height: 2.9em;
  overflow: hidden;
}