:root {
    --bg: #0f1419;
    --panel: #1a212b;
    --panel-2: #222c38;
    --border: #2c3744;
    --text: #e6edf3;
    --muted: #8b98a5;
    --accent: #4c9aff;
    --green: #3fb950;
    --red: #f85149;
    --amber: #d29922;
    --radius: 10px;
}

* { 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: 14px;
    line-height: 1.5;
}

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

.topbar {
    display: flex; align-items: center; gap: 32px;
    padding: 0 24px; height: 56px;
    background: var(--panel); border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 16px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-logo { height: 30px; width: auto; display: block; }
.brand span { color: #fff; font-weight: 400; }
.mainnav { display: flex; gap: 4px; }
.mainnav a {
    padding: 8px 14px; border-radius: 8px; color: var(--muted); font-weight: 500;
}
.mainnav a:hover { background: var(--panel-2); text-decoration: none; color: var(--text); }
.mainnav a.active { background: var(--panel-2); color: var(--text); }

.container { max-width: 1280px; margin: 0 auto; padding: 24px; }
.footer { text-align: center; color: var(--muted); padding: 32px; font-size: 12px; }

h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 28px 0 12px; }
.page-sub { color: var(--muted); margin: 0 0 20px; }

/* KPI karty */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(235px, 1fr)); gap: 14px; margin-bottom: 20px; }
.kpi {
    background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 16px 18px;
}
.kpi .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.kpi .value { font-size: 24px; font-weight: 700; margin-top: 6px; }
.kpi .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

.panel {
    background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 18px; margin-bottom: 20px;
}
.panel h2 { margin-top: 0; }

/* Tabulky */
table.data { width: 100%; border-collapse: collapse; }
table.data th, table.data td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--border); }
table.data th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.kpi .value, .kpi .sub { white-space: nowrap; }
.nowrap { white-space: nowrap; }

/* Sbalení dlouhých datových tabulek (prvních 5 + „Zobrazit všechny") */
table.data tr.row-hidden { display: none; }
.show-all-btn { margin-top: 12px; }

/* Formulářové prvky napříč webem: bílá ikona kalendáře, vlastní šipka selectu */
input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    opacity: 0.85;
    cursor: pointer;
}
select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%238b98a5' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 14px;
    padding-right: 34px !important; /* místo pro šipku, ať nepřekrývá text */
}
table.data tr:hover td { background: var(--panel-2); }

/* Filtrační lišta */
.filter-bar {
    display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end;
    background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 14px 16px; margin-bottom: 20px;
}
.filter-bar .field { display: flex; flex-direction: column; gap: 4px; }
.filter-bar label { font-size: 11px; color: var(--muted); text-transform: uppercase; }
.filter-bar input, .filter-bar select {
    background-color: var(--bg); border: 1px solid var(--border); color: var(--text);
    border-radius: 7px; padding: 7px 9px; font-size: 13px; min-width: 130px;
}
.btn {
    display: inline-block; background: var(--accent); color: #06121f; border: 0;
    padding: 8px 16px; border-radius: 7px; font-weight: 600; cursor: pointer; font-size: 13px;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }

.chart-box { position: relative; height: 320px; }
.chart-box.tall { height: 420px; }

.row { display: grid; gap: 20px; margin-bottom: 20px; }
.row.cols-2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 900px) { .row.cols-2 { grid-template-columns: 1fr; } }

/* Flash */
.flash-wrap { max-width: 1280px; margin: 16px auto 0; padding: 0 24px; }
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 8px; border: 1px solid; }
.flash-success { background: rgba(63,185,80,.12); border-color: var(--green); }
.flash-error { background: rgba(248,81,73,.12); border-color: var(--red); }
.flash-info { background: rgba(76,154,255,.12); border-color: var(--accent); }

/* Badge / segmenty */
.badge { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; }

/* Kohortní heatmapa */
.cohort { border-collapse: collapse; width: 100%; font-size: 12px; }
.cohort th, .cohort td { padding: 7px 9px; text-align: center; border: 1px solid var(--border); }
.cohort td.label, .cohort th.label { text-align: left; color: var(--muted); white-space: nowrap; }

.empty-state { text-align: center; color: var(--muted); padding: 48px 24px; }
.empty-state .btn { margin-top: 16px; }

/* Alerty */
.alerts { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.alert { padding: 11px 14px; border-radius: 8px; border: 1px solid; border-left-width: 3px; font-size: 13px; }
.alert .alert-ico { margin-right: 6px; }
.alert-critical { background: rgba(248,81,73,.10); border-color: var(--red); }
.alert-warning { background: rgba(210,153,34,.10); border-color: var(--amber); }
.alert-info { background: rgba(76,154,255,.10); border-color: var(--accent); }

/* Import mapping */
.map-table { width: 100%; border-collapse: collapse; }
.map-table th, .map-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
.map-table select { width: 100%; }
.req { color: var(--red); }
.opt { color: var(--muted); font-size: 11px; }
.sample { color: var(--muted); font-size: 11px; }

/* Tlačítka – varianty */
.btn-block { display: block; width: 100%; text-align: center; padding: 11px; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.linkbtn { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; padding: 0; }
.linkbtn:hover { text-decoration: underline; }
.linkbtn.danger { color: var(--red); }

/* Uživatelské menu v hlavičce */
.nav-user { display: flex; align-items: center; gap: 9px; margin-left: auto; padding-left: 12px; }
.nav-email { color: var(--muted); font-size: 12px; max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.avatar {
    flex: 0 0 auto; width: 30px; height: 30px; border-radius: 50%;
    background: #ff631a; color: #fff; font-weight: 700; font-size: 13px;
    display: flex; align-items: center; justify-content: center; text-transform: uppercase;
}
.logout-form { margin: 0; display: flex; }
.logout-btn {
    display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; padding: 0;
    border-radius: 8px; background: transparent; border: 1px solid var(--border); color: var(--muted);
    cursor: pointer; transition: color .15s, border-color .15s, background .15s;
}
.logout-btn:hover { color: var(--red); border-color: var(--red); background: rgba(248, 81, 73, .10); }
.mainnav { display: flex; gap: 4px; align-items: center; flex: 1; }

/* Hamburger (skrytý na desktopu) */
.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text);
    border-radius: 8px; font-size: 18px; line-height: 1; padding: 6px 10px; cursor: pointer; }

/* Admin formuláře */
.inline-form { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.inline-form input, .inline-form select {
    background-color: var(--bg); border: 1px solid var(--border); color: var(--text); border-radius: 7px; padding: 7px 9px; font-size: 13px;
}
.chk { display: flex; align-items: center; gap: 5px; color: var(--muted); font-size: 12px; }
.row-actions { white-space: nowrap; }

/* Autentizační stránky */
.auth-body { display: flex; min-height: 100vh; align-items: center; justify-content: center; padding: 20px; }
.auth-wrap { width: 100%; max-width: 380px; }
.auth-card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 28px 26px; }
.auth-brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 18px; margin-bottom: 18px; }
.auth-brand span { color: #fff; font-weight: 400; }
.auth-brand .brand-logo { height: 34px; }
.auth-title { font-size: 19px; margin: 0 0 4px; }
.auth-sub { color: var(--muted); font-size: 13px; margin: 0 0 20px; }
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--muted); }
.auth-form input {
    background: var(--bg); border: 1px solid var(--border); color: var(--text);
    border-radius: 8px; padding: 11px 12px; font-size: 15px;
}
.auth-form input:focus { outline: none; border-color: var(--accent); }
.auth-links { margin-top: 16px; text-align: center; font-size: 13px; color: var(--muted); }

/* ---- Responzivita ---- */
@media (max-width: 860px) {
    .topbar { flex-wrap: wrap; height: auto; padding: 10px 16px; gap: 10px; }
    .nav-toggle { display: block; margin-left: auto; }
    .mainnav {
        display: none; flex: 1 1 100%; flex-direction: column; align-items: stretch;
        width: 100%; gap: 2px; order: 3;
    }
    body.nav-open .mainnav { display: flex; }
    .mainnav a { padding: 11px 12px; border-radius: 8px; }
    .nav-user { margin-left: 0; padding-left: 0; border-top: 1px solid var(--border);
        margin-top: 6px; padding-top: 10px; width: 100%; justify-content: space-between; }
    .nav-email { max-width: none; }
    .container { padding: 16px; }
    .kpi .value { font-size: 20px; }
    /* tabulky scrollovatelné na úzkých displejích */
    .panel { overflow-x: auto; }
    table.data { min-width: 560px; }
    .filter-bar { gap: 10px; }
    .filter-bar input, .filter-bar select { min-width: 0; width: 100%; }
    .filter-bar .field { flex: 1 1 140px; }
}

@media (max-width: 480px) {
    .kpi-grid { grid-template-columns: 1fr 1fr; }
    h1 { font-size: 19px; }
}