:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c2330;
  --muted: #667085;
  --accent: #2459d6;
  --accent-text: #ffffff;
  --border: #dde1e8;
  --ok-bg: #e6f4ea;
  --ok-text: #1b5e32;
  --error-bg: #fdeaea;
  --error-text: #8a1f1f;
  --danger: #b42318;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d;
    --surface: #1b212b;
    --text: #e8ecf3;
    --muted: #9aa4b5;
    --accent: #6c97ff;
    --accent-text: #0d1117;
    --border: #2d3544;
    --ok-bg: #16301f;
    --ok-text: #8fdca8;
    --error-bg: #3a1a1a;
    --error-text: #ffb4b4;
    --danger: #ff8a80;
  }
}

* { box-sizing: border-box; }

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

.wrap { width: min(960px, 100% - 2rem); margin: 2rem auto 4rem; }

h1 { font-size: 1.6rem; margin: 0; }
h2 { font-size: 1.1rem; margin: 0 0 1rem; }

.top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

.card.narrow { max-width: 380px; margin: 12vh auto 0; }

.muted { color: var(--muted); }
.small { font-size: 0.85rem; }

label { display: block; font-size: 0.85rem; font-weight: 600; }

input[type="text"], input[type="password"] {
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.6rem 0.75rem;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

input:focus-visible, button:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button, .btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  font: inherit;
  font-weight: 600;
  color: var(--accent-text);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
}

button.ghost, .btn.ghost {
  color: var(--text);
  background: transparent;
  border-color: var(--border);
}

button.danger { color: var(--danger); }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.span2 { grid-column: 1 / -1; }
form:not(.grid):not(.inline) { display: grid; gap: 1rem; }
.inline { display: flex; gap: 0.75rem; align-items: end; }
.grow { flex: 1; }

.msg { padding: 0.7rem 1rem; border-radius: 8px; margin: 0 0 1rem; word-break: break-all; }
.msg.ok { background: var(--ok-bg); color: var(--ok-text); }
.msg.error { background: var(--error-bg); color: var(--error-text); }

.qr-preview { margin-top: 1rem; }
.qr-preview img { background: #fff; padding: 8px; border-radius: 8px; border: 1px solid var(--border); }
.qr-preview .btn { margin-right: 0.5rem; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.6rem 0.5rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 0.8rem; color: var(--muted); font-weight: 600; }
.num { text-align: right; }
.target { max-width: 280px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.actions form { display: block; }

a { color: var(--accent); }

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .span2 { grid-column: auto; }
  .inline { flex-direction: column; align-items: stretch; }
  .target { max-width: 140px; }
}