:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1f2530;
  --muted: #67707f;
  --line: #e2e5ea;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --ok: #16a34a;
  --warn: #d97706;
  --err: #dc2626;
  --radius: 10px;
}

* { box-sizing: border-box; }

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

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

/* ---------- horná lišta ---------- */
.topbar {
  background: #1e293b;
  color: #fff;
}
.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 17px; }
.topbar nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
.topbar nav a {
  color: #cbd5e1;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 14px;
}
.topbar nav a:hover { background: #334155; color: #fff; text-decoration: none; }
.topbar nav a.active { background: var(--accent); color: #fff; }
.logout-form { margin-left: auto; }

/* hamburger – skrytý na desktope, viditeľný na mobile */
.nav-toggle { display: none; }
.nav-burger { display: none; }

/* ---------- layout ---------- */
.container { max-width: 1100px; margin: 24px auto 60px; padding: 0 16px; }
.footer { text-align: center; color: var(--muted); font-size: 13px; padding: 20px 0 30px; }

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 800px) { .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 18px;
}
.card h2 { margin: 0 0 12px; font-size: 17px; }
.card h3 { margin: 16px 0 8px; font-size: 15px; }

h1 { font-size: 22px; margin: 0 0 16px; }
.page-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.page-head h1 { margin: 0; }

.muted { color: var(--muted); }
.small { font-size: 13px; }

/* ---------- flash ---------- */
.flash {
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  border: 1px solid;
}
.flash-ok { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.flash-err { background: #fef2f2; border-color: #fecaca; color: #991b1b; }

/* ---------- formuláre ---------- */
form .row { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 12px; }
form .field { display: flex; flex-direction: column; gap: 4px; flex: 1; min-width: 150px; }
form .field.wide { flex-basis: 100%; }
label { font-size: 13px; font-weight: 600; color: var(--muted); }
input[type=text], input[type=email], input[type=password], input[type=date],
input[type=month], input[type=number], select, textarea {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  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; min-height: 60px; }
.checkbox-line { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.checkbox-line input { width: auto; }

.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--accent-dark); text-decoration: none; }
.btn-secondary { background: #fff; color: var(--accent); }
.btn-secondary:hover { background: #eff6ff; }
.btn-danger { background: #fff; color: var(--err); border-color: #fca5a5; }
.btn-danger:hover { background: #fef2f2; }
.btn-sm { padding: 4px 10px; font-size: 13px; font-weight: 500; }
.btn-ghost { background: transparent; border-color: #475569; color: #cbd5e1; }
.btn-ghost:hover { background: #334155; }
.btn.js-toggle.is-open { background: #fff; color: var(--accent); }

/* ---------- tabuľky ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12.5px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
tr:last-child td { border-bottom: none; }
td.num, th.num { text-align: right; white-space: nowrap; }
.table-wrap { overflow-x: auto; }

/* ---------- badge ---------- */
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
}
.badge-ok { background: #dcfce7; color: #166534; }
.badge-warn { background: #fef3c7; color: #92400e; }
.badge-err { background: #fee2e2; color: #991b1b; }
.badge-muted { background: #e2e8f0; color: #475569; }

/* ---------- kalendár nájmu ---------- */
.rent-calendar {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}
@media (max-width: 700px) { .rent-calendar { grid-template-columns: repeat(3, 1fr); } }
.rent-month {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 6px;
  text-align: center;
  font-size: 13px;
  background: #fafafa;
}
.rent-month .m-name { font-weight: 600; display: block; }
.rent-month .m-state { font-size: 12px; display: block; margin-top: 2px; }
.rent-month.paid    { background: #dcfce7; border-color: #86efac; color: #166534; }
.rent-month.partial { background: #fef3c7; border-color: #fcd34d; color: #92400e; }
.rent-month.due     { background: #fee2e2; border-color: #fca5a5; color: #991b1b; }
.rent-month.upcoming{ background: #f1f5f9; color: #475569; }
.rent-month.outside { opacity: .45; }

/* ---------- mini kalendár v prehľade ---------- */
.tenant-row { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin-bottom: 12px; }
.tenant-row:last-child { margin-bottom: 0; }
.tenant-row-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 6px 14px; margin-bottom: 10px; }
.tenant-row-meta { white-space: nowrap; }
.tenant-row-actions { margin-top: 10px; display: flex; gap: 6px; flex-wrap: wrap; }

.rent-mini { display: flex; gap: 5px; flex-wrap: wrap; }
.rent-mini-box {
  flex: 1 1 0;
  min-width: 44px;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 2px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fafafa;
  color: var(--muted);
}
.rent-mini-box.paid    { background: #dcfce7; border-color: #86efac; color: #166534; }
.rent-mini-box.partial { background: #fef3c7; border-color: #fcd34d; color: #92400e; }
.rent-mini-box.due     { background: #fee2e2; border-color: #fca5a5; color: #991b1b; }
.rent-mini-box.upcoming{ background: #f1f5f9; color: #64748b; }
.rent-mini-box.outside { opacity: .4; }
.rent-mini-box.is-now  { outline: 2px solid var(--accent); outline-offset: 1px; }

.legend { display: flex; gap: 14px; flex-wrap: wrap; margin: 0 0 14px; }
.legend-item { display: inline-flex; align-items: center; gap: 5px; }
.legend-box { width: 13px; height: 13px; border-radius: 4px; border: 1px solid; display: inline-block; }
.legend-box.paid    { background: #dcfce7; border-color: #86efac; }
.legend-box.partial { background: #fef3c7; border-color: #fcd34d; }
.legend-box.due     { background: #fee2e2; border-color: #fca5a5; }
.legend-box.upcoming{ background: #f1f5f9; border-color: var(--line); }

/* ---------- bilancia ---------- */
.balance-box { font-size: 26px; font-weight: 700; }
.balance-plus { color: var(--ok); }
.balance-minus { color: var(--err); }

/* ---------- login ---------- */
.auth-wrap { max-width: 420px; margin: 60px auto; padding: 0 16px; }
.auth-wrap .card { padding: 28px; }
.auth-wrap h1 { text-align: center; }

/* ---------- dashboard karty ---------- */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; margin-bottom: 18px; }
.stat-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.stat-card .label { font-size: 13px; color: var(--muted); }
.stat-card .value { font-size: 22px; font-weight: 700; margin-top: 2px; }

.actions { white-space: nowrap; }
.actions form { display: inline; }

/* ---------- právne dokumenty ---------- */
.legal { max-width: 820px; }
.legal h2 { font-size: 18px; margin: 0 0 14px; }
.legal h3 { font-size: 15px; margin: 18px 0 6px; }
.legal p { margin: 0 0 10px; }
.legal section { scroll-margin-top: 16px; }

/* ====================================================================
   MOBILE (smartfóny) — do 640px
   ==================================================================== */
@media (max-width: 640px) {
  body { font-size: 15px; }

  /* horná lišta s hamburger menu */
  .topbar-inner { gap: 10px 12px; padding: 10px 14px; flex-wrap: wrap; }
  .brand { font-size: 16px; flex: 1; }
  .nav-burger {
    display: block;
    color: #fff;
    font-size: 22px;
    line-height: 1;
    padding: 6px 10px;
    cursor: pointer;
    border-radius: 6px;
    order: 3;
  }
  .nav-burger:hover { background: #334155; }
  .logout-form { margin-left: 0; order: 2; }
  .logout-form .btn { padding: 6px 10px; font-size: 13px; }
  /* navigácia sa rozbalí pod lištu po kliknutí na ☰ */
  .topbar nav {
    order: 4;
    flex-basis: 100%;
    flex-direction: column;
    gap: 2px;
    display: none;
    padding-top: 8px;
  }
  .nav-toggle:checked ~ nav { display: flex; }
  .topbar nav a { padding: 10px 12px; font-size: 15px; }

  /* layout */
  .container { margin: 16px auto 48px; padding: 0 12px; }
  .card { padding: 14px 14px; margin-bottom: 14px; }
  h1 { font-size: 19px; }
  .card h2 { font-size: 16px; }

  /* prehľadové karty pod sebou */
  .stat-cards { grid-template-columns: 1fr; gap: 10px; }
  .stat-card .value { font-size: 20px; }

  /* formuláre – polia na celú šírku, pohodlnejšie dotykové ciele */
  form .row { gap: 10px; margin-bottom: 10px; }
  form .field { flex-basis: 100%; min-width: 0; }
  input[type=text], input[type=email], input[type=password], input[type=date],
  input[type=month], input[type=number], select, textarea { padding: 10px 12px; font-size: 16px; }
  .btn { padding: 10px 16px; }
  .page-head .btn-sm { padding: 6px 10px; }

  /* kalendár nájmu – 2 stĺpce na úzkych displejoch */
  .rent-calendar { grid-template-columns: repeat(2, 1fr); }

  /* responzívna tabuľka → karty (každý riadok = kartička) */
  table.responsive-table, table.responsive-table tbody,
  table.responsive-table tr, table.responsive-table td { display: block; width: 100%; }
  table.responsive-table thead { display: none; }
  table.responsive-table tr {
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 6px 12px;
    margin-bottom: 10px;
    background: #fafafa;
  }
  table.responsive-table td {
    border: none;
    padding: 6px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    text-align: right;
  }
  table.responsive-table td.num { text-align: right; }
  table.responsive-table td::before {
    content: attr(data-label);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .03em;
    color: var(--muted);
    font-weight: 600;
    text-align: left;
  }
  table.responsive-table td:empty { display: none; }
  table.responsive-table td.actions { justify-content: flex-end; flex-wrap: wrap; }
  table.responsive-table td.actions::before { content: ''; }
}