:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --border: #e2e7ef;
  --text: #1c2333;
  --muted: #6b7688;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --danger: #dc2626;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* ---------- top bar ---------- */
.topbar {
  background: linear-gradient(135deg, #1e293b 0%, #2563eb 100%);
  color: #fff;
}
.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  font-size: 30px;
  background: rgba(255,255,255,.15);
  border-radius: 10px;
  width: 48px; height: 48px;
  display: grid; place-items: center;
}
.brand h1 { margin: 0; font-size: 20px; letter-spacing: .2px; }
.brand-sub { margin: 2px 0 0; font-size: 12.5px; opacity: .85; }
.base-url {
  font-size: 12.5px;
  background: rgba(255,255,255,.12);
  padding: 6px 12px;
  border-radius: 999px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

main { max-width: 1100px; margin: 0 auto; padding: 28px 24px 80px; }

/* ---------- panels & forms ---------- */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 1px 2px rgba(16,24,40,.04);
}
.form-panel h2 { margin: 0 0 16px; font-size: 16px; }

.form-row {
  display: flex;
  gap: 14px;
  align-items: flex-end;
  flex-wrap: wrap;
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field.grow { flex: 1 1 260px; }
.field label { font-size: 12.5px; font-weight: 600; color: var(--muted); }
.field label small { font-weight: 400; }
.field input {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 190px;
  background: #fbfcfe;
}
.field input:focus { outline: 2px solid #bfdbfe; border-color: var(--accent); }

.form-msg { margin: 12px 0 0; font-size: 13.5px; }
.form-msg.err { color: var(--danger); }
.form-msg.ok { color: #15803d; }

/* ---------- buttons ---------- */
.btn {
  font: inherit;
  font-weight: 600;
  font-size: 13.5px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 8px;
  padding: 9px 14px;
  cursor: pointer;
  transition: background .12s, border-color .12s;
  white-space: nowrap;
}
.btn:hover { background: #f1f5fb; border-color: #c9d4e4; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); }
.btn.ghost { border: none; background: transparent; color: var(--muted); }
.btn.ghost:hover { background: #f1f5fb; color: var(--text); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { background: #fef2f2; border-color: #fecaca; }
.btn:disabled { opacity: .6; cursor: default; }

/* ---------- codes grid ---------- */
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 28px 0 14px;
}
.section-head h2 { margin: 0; font-size: 16px; }
.count-pill {
  font-size: 12px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  margin-left: 8px;
}

.codes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--muted);
  padding: 60px 0;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.empty-icon { font-size: 34px; opacity: .4; margin-bottom: 8px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.card-top { display: flex; gap: 16px; align-items: flex-start; }
.qr-thumb {
  flex-shrink: 0;
  width: 96px; height: 96px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  cursor: zoom-in;
}
.qr-thumb img, .qr-thumb canvas { width: 96px !important; height: 96px !important; display: block; }
.card-info { flex: 1; min-width: 0; }
.card-name { margin: 0; font-size: 15px; word-break: break-word; }
.card-dest {
  margin: 4px 0 0;
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.short-link {
  margin-top: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  color: var(--accent);
  word-break: break-all;
}
.stats-row { display: flex; gap: 8px; flex-wrap: wrap; }
.stat {
  flex: 1 1 0;
  background: #f6f8fc;
  border-radius: 8px;
  padding: 8px 10px;
  text-align: center;
}
.stat b { display: block; font-size: 17px; }
.stat span { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
.card-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.card-actions .btn { flex: 1 1 auto; text-align: center; }

/* ---------- modal ---------- */
dialog {
  border: none;
  border-radius: var(--radius);
  padding: 0;
  width: min(720px, 92vw);
  max-height: 86vh;
  box-shadow: 0 24px 64px rgba(16,24,40,.25);
}
dialog::backdrop { background: rgba(15,23,42,.45); }
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: #fff;
  border-radius: var(--radius) var(--radius) 0 0;
}
.modal-head h3 { margin: 0; font-size: 15px; }
.modal-body { padding: 20px; overflow-y: auto; max-height: calc(86vh - 70px); }

.chart-wrap { margin: 4px 0 18px; }
.chart-title { font-size: 13px; font-weight: 600; color: var(--muted); margin: 0 0 10px; }

table.scans { width: 100%; border-collapse: collapse; font-size: 13px; }
table.scans th {
  text-align: left;
  color: var(--muted);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .4px;
  border-bottom: 1px solid var(--border);
  padding: 6px 8px;
}
table.scans td { padding: 7px 8px; border-bottom: 1px solid #eef1f7; vertical-align: top; }
table.scans tr:last-child td { border-bottom: none; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
.no-scans { color: var(--muted); text-align: center; padding: 26px 0; }

.modal-qr-row {
  display: flex;
  gap: 20px;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.big-qr { width: 200px; height: 200px; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.big-qr img, .big-qr canvas { width: 200px !important; height: 200px !important; display: block; }

.device-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  background: #eef2ff;
  color: #4338ca;
}
.device-tag.mobile { background: #ecfdf5; color: #047857; }
.device-tag.tablet { background: #fffbeb; color: #b45309; }
.device-tag.desktop { background: #eff6ff; color: #1d4ed8; }
.device-tag.bot { background: #f3f4f6; color: #6b7280; }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  background: #1e293b;
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  box-shadow: 0 8px 24px rgba(15,23,42,.3);
  z-index: 50;
}

.offscreen { position: absolute; left: -10000px; top: -10000px; }

/* ---------- QR colour & background options ---------- */
.field input[type="color"] {
  width: 52px;
  min-width: 52px;
  height: 38px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}
.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 400;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  background: #fbfcfe;
  cursor: pointer;
  min-height: 38px;
}
.check input { width: auto; min-width: 0; }

/* ---------- PNG size menu ---------- */
.png-menu {
  position: fixed;
  z-index: 60;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(16, 24, 40, 0.18);
  padding: 6px;
  display: flex;
  flex-direction: column;
  min-width: 130px;
}
.png-menu-item {
  font: inherit;
  font-size: 13px;
  text-align: left;
  background: none;
  border: none;
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.png-menu-item:hover {
  background: #f1f5fb;
}

@media (max-width: 640px) {
  .field input { min-width: 0; width: 100%; }
  .field { width: 100%; }
  #create-btn { width: 100%; }
}