:root {
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --border: #e3e6ec;
  --text: #1f2430;
  --text-muted: #6b7280;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --success-bg: #ecfdf5;
  --success-text: #047857;
  --error-bg: #fef2f2;
  --error-text: #b91c1c;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}

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

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 17px; margin: 28px 0 10px; }

/* Topbar */
.topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 56px;
}
.brand { font-weight: 700; color: var(--text); font-size: 16px; }
.brand:hover { text-decoration: none; }
.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a {
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-weight: 500;
}
.topbar nav a:hover { background: var(--bg); text-decoration: none; }
.topbar nav a.active { color: var(--primary); background: #eef2ff; }
.topbar-user { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-muted); }

.container { max-width: 1100px; margin: 0 auto; padding: 28px 20px 60px; }

/* Cards (dashboard) */
.cards { display: flex; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  min-width: 160px;
}
.card-number { font-size: 28px; font-weight: 700; }
.card-label { color: var(--text-muted); font-size: 13px; margin-top: 4px; }
.quick-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* Alerts */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
}
.alert-success { background: var(--success-bg); color: var(--success-text); }
.alert-error { background: var(--error-bg); color: var(--error-text); }

/* Page head */
.page-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }

/* Search */
.search-bar { display: flex; gap: 8px; margin-bottom: 16px; }
.search-bar input {
  flex: 1;
  max-width: 360px;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
}

/* Tables */
.data-table, .items-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.data-table th, .data-table td,
.items-table th, .items-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.data-table th, .items-table th {
  background: #fafbfc;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.data-table tbody tr:hover { background: #fafbfc; }
.data-table tbody tr:last-child td, .items-table tbody tr:last-child td { border-bottom: none; }

.row-actions { display: flex; gap: 12px; align-items: center; white-space: nowrap; }
.row-actions form { display: inline; margin: 0; }
.link-danger {
  background: none; border: none; padding: 0; margin: 0;
  color: #b91c1c; cursor: pointer; font-size: 14px; text-decoration: none;
  font-family: inherit;
}
.link-danger:hover { text-decoration: underline; }

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  background: #f1f2f4;
  color: var(--text-muted);
}
.badge-yes { background: var(--success-bg); color: var(--success-text); }
.badge-no { background: var(--error-bg); color: var(--error-text); }

/* Forms */
.form-grid {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 780px;
}
.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}
.form-grid input[type=text],
.form-grid input[type=email],
.form-grid input[type=date],
.form-grid input[type=number],
.form-grid input[type=password],
.form-grid select,
.form-grid textarea {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 400;
  color: var(--text);
  font-family: inherit;
}
.form-grid textarea { resize: vertical; }
.checkbox-label { flex-direction: row !important; align-items: center; font-weight: 500 !important; }
.checkbox-label input { width: auto; }

.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.form-narrow { max-width: 220px; }
.form-actions { display: flex; gap: 10px; margin-top: 8px; }
.hint { color: var(--text-muted); font-size: 13px; margin: -6px 0 16px; max-width: 780px; }

.input-with-clear { display: flex; gap: 6px; }
.input-with-clear input { flex: 1; }
.btn-clear {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}
.btn-clear:hover { background: var(--bg); color: var(--text); }

/* Detail (Zobraziť) */
.detail-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
  max-width: 780px;
}
.detail-heading { margin-top: 0; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; margin: 0; }
.detail-grid > div { display: flex; flex-direction: column; gap: 3px; }
.detail-grid .span-2 { grid-column: 1 / -1; }
.detail-grid dt { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.03em; }
.detail-grid dd { margin: 0; font-size: 14px; }
.items-table tfoot td { border-top: 2px solid var(--border); border-bottom: none; background: #fafbfc; }

/* Items table inside lease form */
.items-table { margin-bottom: 4px; }
.items-table td { vertical-align: middle; }
.items-table input[type=text] {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}
.items-table input[type=checkbox] { width: 16px; height: 16px; }
.items-table td.center { text-align: center; }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 9px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--primary-hover); text-decoration: none; }
.btn-secondary { background: var(--card-bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg); }

/* Login page */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 320px;
}
.login-box h1 { font-size: 18px; text-align: center; margin-bottom: 20px; }
.login-box form { display: flex; flex-direction: column; gap: 14px; }
.login-box label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 600; color: var(--text-muted); }
.login-box input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
}
.login-box .btn { margin-top: 6px; }

@media (max-width: 700px) {
  .form-row-2, .form-row-3 { grid-template-columns: 1fr; }
  .topbar-inner { flex-wrap: wrap; height: auto; padding: 10px 20px; }
  .data-table, .items-table { display: block; overflow-x: auto; }
}