:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1d2330;
  --muted: #5f6878;
  --border: #d6dae1;
  --accent: #2557d6;
  --accent-hover: #1c46b0;
  --error: #c62828;
  --warning-bg: #fff4d6;
  --warning-text: #6b4e00;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --card: #1e232b;
    --text: #e8ebf0;
    --muted: #9aa3b2;
    --border: #353c48;
    --accent: #5b8cff;
    --accent-hover: #7aa2ff;
    --error: #ff6b6b;
    --warning-bg: #3a3020;
    --warning-text: #f3d48a;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

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

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 32px 16px;
}

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px 24px;
}

.user-box { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.user-name { color: var(--muted); font-size: 0.9rem; }

.login { max-width: 400px; margin: 0 auto; }

h1 { margin: 0 0 4px; font-size: 1.6rem; }
h2 { margin: 0 0 16px; font-size: 1.2rem; }
.result h2 { text-align: center; }
.subtitle { margin: 0 0 24px; color: var(--muted); }

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 760px) {
  .layout { grid-template-columns: 1fr 1fr; align-items: start; }
}

.stack { display: flex; flex-direction: column; gap: 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

form { display: flex; flex-direction: column; gap: 16px; }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
}

input {
  font: inherit;
  font-weight: 400;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}

input[aria-invalid="true"] { border-color: var(--error); }

.error { margin: 0; color: var(--error); font-size: 0.9rem; }

button, .btn {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
}

button:hover, .btn:hover { border-color: var(--accent); }
button:disabled { opacity: 0.6; cursor: wait; }
button.small { padding: 6px 10px; font-size: 0.85rem; }

button.primary, .btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

button.primary:hover, .btn.primary:hover { background: var(--accent-hover); }

.result { display: flex; flex-direction: column; align-items: center; }

#qr-canvas {
  width: 100%;
  max-width: 280px;
  height: auto;
  image-rendering: pixelated;
  border-radius: 8px;
}

.hint { color: var(--muted); font-size: 0.85rem; text-align: center; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 16px;
}

.form-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.vcard-link {
  margin-bottom: 16px;
  font-size: 0.85rem;
  color: var(--accent);
  word-break: break-all;
  text-align: center;
}

.warning {
  margin: 0 0 16px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--warning-bg);
  color: var(--warning-text);
  font-size: 0.85rem;
}

.contact-list { list-style: none; margin: 0; padding: 0; }

.contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.contact-list li:first-child { border-top: none; }
.contact-name { display: block; font-weight: 600; overflow-wrap: anywhere; }
.contact-company { display: block; color: var(--muted); font-size: 0.85rem; overflow-wrap: anywhere; }
.contact-actions { display: flex; gap: 6px; }
#empty-list { text-align: left; margin: 0; }