* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

body.theme-dark {
  --bg: #0b1220;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --card: #111827;
  --line: #334155;
  --panel: #0f172a;
  --action-bg: #0f172a;
  --action-text: #f8fafc;
}

body.theme-light {
  --bg: #f2f4f7;
  --text: #1e293b;
  --muted: #64748b;
  --card: #ffffff;
  --line: #e2e8f0;
  --panel: #f8fafc;
  --action-bg: #ffffff;
  --action-text: #1e293b;
}

.container {
  max-width: 920px;
  margin: 0 auto;
  min-height: 100dvh;
  padding: 16px;
  background: var(--card);
  border-radius: 14px;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
}

.brand {
  text-align: center;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.logo {
  max-width: 320px;
  width: 100%;
  height: auto;
}

h1 {
  margin: 14px 0 8px;
  font-size: 28px;
}

.brand p {
  margin: 0;
  color: var(--muted);
}

.actions {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.theme-control {
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

.theme-control select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: var(--panel);
  color: var(--text);
}

.action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--action-bg);
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  color: var(--action-text);
}

.action.primary {
  background: #0f3a97;
  color: #fff;
  border-color: #0f3a97;
}

.action.wallet {
  background: #111827;
  color: #ffffff;
  border-color: #111827;
}

body.theme-dark .action.wallet {
  background: #ffffff;
  color: #111827;
  border-color: #ffffff;
}

.panel {
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.panel h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.status-panel {
  margin-top: 14px;
  border-left: 4px solid #0f3a97;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: 10px;
}

.form-grid input,
.form-grid select {
  width: 100%;
  min-height: 44px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
}

.list-toolbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-bottom: 10px;
}

.list-toolbar input {
  width: 100%;
  min-height: 44px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
}

.visitor-list {
  display: grid;
  gap: 8px;
}

.visitor-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
}

.visitor-row button {
  padding: 8px 10px;
  border: 1px solid #0f3a97;
  color: #0f3a97;
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
}

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

.delete-visitor {
  border-color: #dc2626 !important;
  color: #dc2626 !important;
}

#status {
  margin: 0;
  color: var(--text);
}

@media (min-width: 760px) {
  .container {
    margin: 24px auto;
    min-height: auto;
    padding: 24px;
  }

  .actions {
    grid-template-columns: repeat(2, minmax(180px, 1fr));
  }

  h1 {
    font-size: 24px;
  }

  .form-grid {
    grid-template-columns: repeat(3, minmax(120px, 1fr));
  }

  .visitor-row {
    grid-template-columns: 1.4fr 1fr 1fr auto;
  }
}