/* QR Studio — styles */
:root {
  --bg: #f4f5fb;
  --panel: #ffffff;
  --panel-2: #f7f8fd;
  --border: #e4e6f0;
  --text: #1d2333;
  --muted: #6b7288;
  --accent: #6d5efc;
  --accent-2: #8b7cff;
  --accent-weak: #eceaff;
  --danger: #e05656;
  --warn-bg: #fff5e6;
  --warn-fg: #9a6a00;
  --ok-bg: #e9f9ef;
  --ok-fg: #1f8a4c;
  --shadow: 0 6px 24px rgba(30, 34, 60, .08);
  --radius: 14px;
}
html[data-theme="dark"] {
  --bg: #14161f;
  --panel: #1c1f2b;
  --panel-2: #232735;
  --border: #2e3346;
  --text: #e7e9f3;
  --muted: #9aa0b6;
  --accent: #8b7cff;
  --accent-2: #a89bff;
  --accent-weak: #2a2740;
  --warn-bg: #3a2f18;
  --warn-fg: #f4c471;
  --ok-bg: #163224;
  --ok-fg: #6ee0a0;
  --shadow: 0 6px 24px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

/* Header */
header.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand .logo {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; color: #fff; font-weight: 800;
  box-shadow: 0 4px 12px rgba(109, 94, 252, .4);
}
.brand .title { font-weight: 700; font-size: 16px; line-height: 1; }
.brand .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }
.spacer { flex: 1; }
.iconbtn {
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  border-radius: 10px; padding: 7px 12px; cursor: pointer; font-size: 13px; font-weight: 600;
  transition: .15s;
}
.iconbtn:hover { border-color: var(--accent); color: var(--accent); }

/* Layout */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 400px; gap: 18px; padding: 18px; align-items: start; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; margin-bottom: 16px;
}
.card h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 12px; }

/* Type grid */
.type-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(84px, 1fr)); gap: 8px; }
.type-btn {
  border: 1px solid var(--border); background: var(--panel-2); border-radius: 11px;
  padding: 10px 6px; cursor: pointer; text-align: center; transition: .15s; color: var(--text);
  display: flex; flex-direction: column; align-items: center; gap: 6px; font-size: 12px; font-weight: 600;
}
.type-btn .ic { font-size: 18px; line-height: 1; }
.type-btn:hover { border-color: var(--accent-2); }
.type-btn.active { border-color: var(--accent); background: var(--accent-weak); color: var(--accent); }

/* Forms */
.field { margin-bottom: 12px; }
.field:last-child { margin-bottom: 0; }
.field label { display: block; font-size: 12.5px; font-weight: 600; margin-bottom: 5px; color: var(--muted); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
input[type=text], input[type=tel], input[type=email], input[type=number],
input[type=url], input[type=datetime-local], input[type=date], textarea, select {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel-2); color: var(--text); font-size: 13.5px; font-family: inherit; outline: none; transition: .15s;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-weak); }
textarea { resize: vertical; min-height: 68px; }
.check { display: flex; align-items: center; gap: 8px; }
.check input { width: 16px; height: 16px; accent-color: var(--accent); }
.check label { margin: 0; color: var(--text); font-weight: 500; }

/* Accordion */
.acc { border: 1px solid var(--border); border-radius: 12px; margin-bottom: 10px; overflow: hidden; background: var(--panel-2); }
.acc > .head {
  display: flex; align-items: center; justify-content: space-between; cursor: pointer;
  padding: 12px 14px; font-weight: 700; font-size: 13.5px; user-select: none;
}
.acc > .head .chev { transition: .2s; color: var(--muted); }
.acc.open > .head .chev { transform: rotate(90deg); }
.acc > .body { padding: 0 14px 14px; display: none; }
.acc.open > .body { display: block; }

/* Segmented control */
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; background: var(--panel); }
.seg button { border: 0; background: transparent; padding: 7px 12px; cursor: pointer; font-size: 12.5px; font-weight: 600; color: var(--muted); }
.seg button.active { background: var(--accent); color: #fff; }

/* Style option chips */
.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  border: 1px solid var(--border); background: var(--panel-2); border-radius: 9px;
  padding: 7px 11px; cursor: pointer; font-size: 12.5px; font-weight: 600; color: var(--text); transition: .12s;
}
.chip:hover { border-color: var(--accent-2); }
.chip.active { border-color: var(--accent); background: var(--accent-weak); color: var(--accent); }

/* Presets */
.presets { display: grid; grid-template-columns: repeat(auto-fill, minmax(56px,1fr)); gap: 8px; }
.preset { border: 1px solid var(--border); border-radius: 10px; padding: 6px; cursor: pointer; background: var(--panel-2); transition: .12s; }
.preset:hover { border-color: var(--accent); }
.preset canvas, .preset .ph { width: 100%; aspect-ratio: 1; border-radius: 6px; display: block; }

/* Color rows */
.colorline { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.colorline label { flex: 1; margin: 0; font-weight: 600; color: var(--muted); font-size: 12.5px; }
input[type=color] {
  width: 42px; height: 30px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); cursor: pointer; padding: 2px;
}
input[type=range] { width: 100%; accent-color: var(--accent); }
.rangewrap { display: flex; align-items: center; gap: 10px; }
.rangewrap output { min-width: 42px; text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; font-size: 12.5px; }

/* Logo drop */
.drop {
  border: 2px dashed var(--border); border-radius: 12px; padding: 18px; text-align: center; cursor: pointer;
  color: var(--muted); transition: .15s; background: var(--panel-2);
}
.drop:hover, .drop.dragover { border-color: var(--accent); color: var(--accent); background: var(--accent-weak); }
.drop .big { font-size: 24px; }
.drop small { display: block; margin-top: 4px; opacity: .8; }
.logo-preview { display: none; align-items: center; gap: 12px; }
.logo-preview img { width: 52px; height: 52px; object-fit: contain; border: 1px solid var(--border); border-radius: 9px; background: #fff; padding: 4px; }
.linkbtn { background: none; border: none; color: var(--danger); cursor: pointer; font-weight: 600; font-size: 12.5px; padding: 0; }

/* Preview panel */
.preview-wrap { position: sticky; top: 84px; }
.preview-stage {
  display: grid; place-items: center; padding: 22px; border-radius: 12px; min-height: 300px;
  background:
    linear-gradient(45deg, #e9ebf3 25%, transparent 25%, transparent 75%, #e9ebf3 75%) 0 0/22px 22px,
    linear-gradient(45deg, #e9ebf3 25%, transparent 25%, transparent 75%, #e9ebf3 75%) 11px 11px/22px 22px,
    var(--panel-2);
}
html[data-theme="dark"] .preview-stage {
  background:
    linear-gradient(45deg, #262a3a 25%, transparent 25%, transparent 75%, #262a3a 75%) 0 0/22px 22px,
    linear-gradient(45deg, #262a3a 25%, transparent 25%, transparent 75%, #262a3a 75%) 11px 11px/22px 22px,
    var(--panel-2);
}
#frameBox { display: inline-block; }
#qrPreview { display: block; }
#qrPreview canvas, #qrPreview svg { display: block; border-radius: 2px; }

.msg { border-radius: 10px; padding: 9px 12px; font-size: 12.5px; margin-top: 10px; line-height: 1.45; }
.msg.warn { background: var(--warn-bg); color: var(--warn-fg); }
.msg.ok { background: var(--ok-bg); color: var(--ok-fg); }
.msg.note { background: var(--panel-2); color: var(--muted); border: 1px solid var(--border); }

/* Download buttons */
.dlgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin-top: 4px; }
.btn {
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  border-radius: 11px; padding: 11px; cursor: pointer; font-weight: 700; font-size: 13px; transition: .15s;
  display: flex; align-items: center; justify-content: center; gap: 7px;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border: 0; }
.btn.primary:hover { color: #fff; filter: brightness(1.05); }
.btn.wide { grid-column: 1 / -1; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.filenamerow { display: flex; gap: 8px; align-items: center; margin: 12px 0 6px; }
.filenamerow input { flex: 1; }

.hint { font-size: 11.5px; color: var(--muted); margin-top: 4px; line-height: 1.4; }
.footer-note { font-size: 11.5px; color: var(--muted); padding: 4px 20px 18px; text-align: center; }