:root {
  --bg: #f4f5f7;
  --card-bg: #ffffff;
  --border: #e0e2e7;
  --text: #1f2430;
  --text-muted: #6b7280;
  --primary: #2f6fed;
  --primary-dark: #2559c7;
  --danger: #d0342c;
  --success: #1a8a4a;
  --radius: 8px;
}

* { box-sizing: border-box; }

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

.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 320px;
}

.login-card h1 {
  font-size: 18px;
  margin: 0 0 20px;
}

.login-card form,
.search-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-card label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--text-muted);
}

input[type="text"],
input[type="password"] {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 6px;
  padding: 9px 16px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
}

button:hover { background: var(--primary-dark); }

.link-button {
  background: none;
  color: var(--text-muted);
  padding: 0;
  font-size: 13px;
  text-decoration: underline;
}

.inline-form { display: inline; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.topbar-title { font-weight: 600; }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.topbar-user { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-muted); }
.topbar-link { color: var(--primary); text-decoration: none; font-weight: 500; }
.topbar-link:hover { text-decoration: underline; }

.page-title { font-size: 20px; margin: 0 0 16px; }

.lang-switcher { display: flex; gap: 4px; font-size: 12px; }
.lang-switcher a {
  padding: 3px 8px;
  border-radius: 5px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-decoration: none;
}
.lang-switcher a.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.lang-switcher-floating {
  position: fixed;
  top: 16px;
  right: 16px;
}

.container {
  max-width: 900px;
  margin: 24px auto;
  padding: 0 16px;
}

.search-form {
  flex-direction: row;
  margin-bottom: 20px;
}

.search-form input {
  flex: 1;
}

.alert {
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-error { background: #fdecea; color: var(--danger); }
.alert-empty { background: #fff8e6; color: #8a6100; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.card h2 { margin: 0 0 12px; font-size: 16px; }
.card h3 { margin: 16px 0 8px; font-size: 13px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }

.kv-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.kv-table th {
  text-align: left;
  color: var(--text-muted);
  font-weight: 500;
  padding: 6px 12px 6px 0;
  width: 220px;
  vertical-align: top;
}
.kv-table td { padding: 6px 0; }

.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th, .data-table td {
  text-align: left;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}
.data-table th { color: var(--text-muted); font-weight: 500; }

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.status-paid { color: var(--success); font-weight: 600; }
.status-unpaid { color: var(--danger); font-weight: 600; }

.card-muted { background: #fafafa; }
.hint-text { font-size: 13px; color: var(--text-muted); margin: 0 0 10px; }