:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #667085;
  --line: #d9dee7;
  --accent: #1f6feb;
  --accent-dark: #174ea6;
  --danger: #b42318;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  background: #111827;
  color: #fff;
}
.brand { color: #fff; font-weight: 700; font-size: 18px; }
.topbar nav { display: flex; gap: 18px; align-items: center; }
.topbar nav a { color: #e5e7eb; }

.page { max-width: 1180px; margin: 0 auto; padding: 28px; }
.title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}
h1, h2 { margin: 0; letter-spacing: 0; }
h1 { font-size: 28px; }
h2 { font-size: 18px; margin-bottom: 14px; }
p { margin: 6px 0 0; color: var(--muted); }

.panel, .auth-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 18px;
}
.auth-panel { max-width: 420px; margin: 80px auto; }

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}
.metrics div {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}
.metrics strong { display: block; font-size: 30px; }
.metrics span { color: var(--muted); }

table { width: 100%; border-collapse: collapse; }
th, td {
  padding: 11px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
th { color: var(--muted); font-size: 13px; font-weight: 600; }

.form-stack { display: grid; gap: 14px; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.full { grid-column: 1 / -1; }
label { display: grid; gap: 6px; color: #344054; font-size: 14px; }
label.inline { display: flex; align-items: center; gap: 8px; align-self: end; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 11px;
  font: inherit;
  background: #fff;
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
fieldset {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}
legend { color: var(--muted); padding: 0 6px; }
.check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
}
.check-list label {
  display: flex;
  align-items: center;
  gap: 8px;
}
.check-list input { width: auto; }
.check-list span { color: var(--muted); }

button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 13px;
  background: #fff;
  color: var(--text);
  font: inherit;
  cursor: pointer;
}
.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.primary:hover { background: var(--accent-dark); text-decoration: none; }
.actions { display: flex; gap: 10px; align-items: center; }

.flash {
  border: 1px solid #fedf89;
  background: #fffaeb;
  color: #93370d;
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 16px;
}
.status {
  display: inline-flex;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 12px;
  background: #ecfdf3;
  color: #027a48;
}
.status.disabled { background: #fef3f2; color: var(--danger); }
.tag {
  display: inline-flex;
  margin-left: 6px;
  border-radius: 999px;
  padding: 2px 7px;
  background: #eef4ff;
  color: #3538cd;
  font-size: 12px;
}
.subscription-list { display: grid; gap: 12px; }
.subscription-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}
.subscription-item:last-child { border-bottom: 0; padding-bottom: 0; }
.subscription-main { display: grid; gap: 8px; min-width: 0; }
.subscription-main strong { font-size: 15px; }
.subscription-main input { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.subscription-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}
.qr-details { position: relative; }
.qr-details summary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 13px;
  background: #fff;
  cursor: pointer;
  list-style: none;
}
.qr-details summary::-webkit-details-marker { display: none; }
.qr-panel {
  position: absolute;
  right: 0;
  top: 44px;
  z-index: 3;
  width: 220px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.14);
}
.qr-panel img { display: block; width: 196px; height: 196px; }

@media (max-width: 760px) {
  body { background: #fff; }
  .topbar { height: auto; padding: 14px 16px; align-items: flex-start; gap: 10px; }
  .topbar, .title-row, .actions { flex-direction: column; }
  .brand { font-size: 17px; }
  .topbar nav { width: 100%; flex-wrap: wrap; gap: 10px 14px; }
  .page { padding: 14px; }
  h1 { font-size: 24px; }
  h2 { font-size: 17px; }
  .panel, .auth-panel { padding: 16px; }
  .auth-panel { margin: 32px auto; }
  input, select, textarea {
    min-height: 44px;
    font-size: 16px;
  }
  button, .button, .qr-details summary {
    width: 100%;
    min-height: 46px;
  }
  .actions { width: 100%; align-items: stretch; }
  .metrics, .form-grid, .check-list, .subscription-item { grid-template-columns: 1fr; }
  .subscription-item { gap: 14px; padding-bottom: 16px; }
  .subscription-actions {
    display: grid;
    grid-template-columns: 1fr;
    justify-content: stretch;
    width: 100%;
  }
  .qr-details { width: 100%; }
  .qr-panel {
    position: static;
    width: 100%;
    margin-top: 8px;
    box-shadow: none;
  }
  .qr-panel img {
    width: min(240px, 100%);
    height: auto;
    margin: 0 auto;
  }
  table { display: block; overflow-x: auto; }
}