:root {
  --bg: #f6f7f9;
  --card: #fff;
  --border: #e3e5ea;
  --text: #1f2328;
  --muted: #6a737d;
  --accent: #1f6feb;
  --accent-hover: #1858c4;
  --danger: #d1242f;
  --success: #1a7f37;
}

* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: #eef0f3; padding: 1px 4px; border-radius: 3px; font-size: 0.9em; }

.topbar { display: flex; justify-content: space-between; align-items: center; padding: 12px 24px; background: #fff; border-bottom: 1px solid var(--border); }
.topbar .brand { font-weight: 700; color: var(--text); font-size: 17px; }
.topbar nav { display: flex; gap: 16px; align-items: center; }
.topbar nav .user { color: var(--muted); font-size: 0.9em; }
button.link { background: none; border: none; color: var(--accent); cursor: pointer; font: inherit; padding: 0; }

main { max-width: 1000px; margin: 24px auto; padding: 0 24px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 24px; margin-bottom: 24px; }
.card h1 { margin-top: 0; }
.card h2 { margin-top: 32px; border-top: 1px solid var(--border); padding-top: 16px; }

.muted { color: var(--muted); }
.breadcrumb { color: var(--muted); font-size: 0.9em; margin-bottom: 4px; }
.page-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }

.flash { padding: 10px 16px; margin: 12px 24px; border-radius: 4px; }
.flash-error { background: #ffebe9; border: 1px solid #ffcecb; color: var(--danger); }
.flash-success { background: #dafbe1; border: 1px solid #aceebb; color: var(--success); }
.flash-info { background: #eef0f3; border: 1px solid var(--border); color: var(--muted); }

input, select, textarea { font: inherit; padding: 6px 10px; border: 1px solid var(--border); border-radius: 4px; background: #fff; width: 100%; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
textarea { resize: vertical; }

button, .btn, .btn-secondary, .btn-success-submit { font: inherit; padding: 7px 14px; border-radius: 4px; cursor: pointer; display: inline-block; text-align: center; }
button, .btn { border: 1px solid var(--accent); background: var(--accent); color: #fff; }
button:hover, .btn:hover { background: var(--accent-hover); text-decoration: none; color: #fff; }
.btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #fafbfc; text-decoration: none; color: var(--text); }
.btn-success-submit { background: var(--success); border: 1px solid var(--success); color: #fff; }
.btn-success-submit:hover { background: #15672c; }
button.danger, .danger { background: #fff; color: var(--danger); border: 1px solid var(--danger); }
button.danger:hover { background: var(--danger); color: #fff; }
.btn-icon { background: none; border: none; color: var(--muted); cursor: pointer; padding: 2px 6px; font-size: 1em; }
.btn-icon:hover { color: var(--danger); background: none; }
.danger-link { color: var(--danger) !important; }
.inline-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
form.inline { display: inline-block; margin: 0; }
.form-actions { display: flex; gap: 10px; align-items: center; margin-top: 16px; flex-wrap: wrap; }
.actions-bar { display: flex; gap: 10px; flex-wrap: wrap; margin: 0 0 20px; }

/* Tabulky */
table.data { width: 100%; border-collapse: collapse; margin-top: 12px; }
table.data th, table.data td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
table.data th { background: #fafbfc; font-size: 0.85em; color: var(--muted); }
.overdue { color: var(--danger); font-weight: 600; }

/* Dashboard stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 16px 0 20px; }
.stat { background: #fafbfc; border: 1px solid var(--border); border-radius: 6px; padding: 12px 16px; display: flex; flex-direction: column; gap: 4px; }
.stat-label { font-size: 0.8em; color: var(--muted); }
.stat-value { font-size: 1.3em; font-weight: 700; }
.stat-warn { border-color: #f0c36d; background: #fff8e8; }

/* Filtry / chipy */
.filters { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.chip { padding: 4px 12px; border-radius: 14px; border: 1px solid var(--border); background: #fff; color: var(--text); font-size: 0.85em; }
.chip:hover { background: #fafbfc; text-decoration: none; }
.chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.search { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; max-width: 480px; }

/* Formuláře */
fieldset.fs { border: 1px solid var(--border); border-radius: 6px; padding: 16px; margin: 0 0 16px; }
fieldset.fs legend { font-weight: 600; padding: 0 8px; color: var(--text); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid2 label { display: flex; flex-direction: column; font-size: 0.85em; color: var(--muted); gap: 4px; }
.grid2 label.full, .grid2 .full { grid-column: 1 / -1; }
.badge-public { display: inline-block; font-size: 0.7em; font-weight: 700; letter-spacing: 0.04em; padding: 2px 8px; border-radius: 10px; background: #ddf4ff; color: #0969da; margin-left: 6px; vertical-align: middle; }
label.checkbox { flex-direction: row !important; align-items: center; gap: 8px; font-size: 0.9em; color: var(--text); }
label.checkbox input { width: auto; }
.with-btn { display: flex; gap: 6px; }
.with-btn input { flex: 1; }
.with-btn button { white-space: nowrap; }

/* Položky faktury */
.items-table input, .items-table select { padding: 5px 7px; }
.items-table td { vertical-align: middle; }
.totals-preview { display: flex; gap: 24px; justify-content: flex-end; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.totals-preview .grand strong { font-size: 1.2em; color: var(--accent); }

/* Detail — strany */
.parties { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 16px 0; }
.party { background: #fafbfc; border: 1px solid var(--border); border-radius: 6px; padding: 14px 16px; line-height: 1.7; }
.party h3 { margin: 0 0 8px; font-size: 0.85em; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.meta-table th { width: 1%; white-space: nowrap; }
.summary-row { display: flex; justify-content: space-between; gap: 24px; margin-top: 20px; align-items: flex-start; flex-wrap: wrap; }
.qr-box { text-align: center; display: flex; flex-direction: column; gap: 4px; align-items: center; }
table.totals { border-collapse: collapse; min-width: 280px; margin-left: auto; }
table.totals td { padding: 5px 12px; text-align: right; }
table.totals td:first-child { text-align: left; color: var(--muted); }
table.totals tr.sub td { border-top: 1px solid var(--border); font-weight: 600; color: var(--text); }
table.totals tr.grand td { border-top: 2px solid var(--text); font-size: 1.2em; font-weight: 700; padding-top: 8px; }
table.totals tr.grand td:last-child { color: var(--accent); }
.note-box { margin-top: 16px; padding: 12px 16px; background: #fafbfc; border: 1px solid var(--border); border-radius: 6px; }

/* Status badges */
.status-badge { display: inline-block; font-size: 0.7em; font-weight: 600; padding: 2px 9px; border-radius: 10px; vertical-align: middle; text-transform: uppercase; letter-spacing: 0.03em; }
.status-badge.status-draft { background: #eef0f3; color: #6a737d; }
.status-badge.status-issued { background: #ddf4ff; color: #0969da; }
.status-badge.status-paid { background: #dafbe1; color: #1a7f37; }
.status-badge.status-cancelled { background: #ffebe9; color: var(--danger); }

.login-body { background: var(--bg); min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 32px; width: 360px; }
.login-card h1 { margin: 0 0 16px; text-align: center; }
.login-card form { display: flex; flex-direction: column; gap: 12px; }
.login-card label { display: flex; flex-direction: column; font-size: 0.85em; color: var(--muted); gap: 4px; }
.footer { text-align: center; color: var(--muted); padding: 16px; }

@media (max-width: 720px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid2, .parties { grid-template-columns: 1fr; }
}