:root {
    /* značka */
    --brand-blue: #124a7c;
    --brand-blue-dark: #0d3a62;
    --brand-green: #2e9e43;
    --brand-green-dark: #248036;
    /* neutrály (svetlá téma) */
    --ink: #1f2933;
    --muted: #5b6b7b;
    --line: #e2e8f0;
    --bg: #ffffff;
    --bg-soft: #f5f8fb;
    --surface: #ffffff;
    --tag-muted-bg: #eef2f6;
    --logo-pad: 0;
    --logo-bg: transparent;
    --shadow: 0 10px 30px rgba(18, 74, 124, 0.10);
    /* rozmery */
    --radius: 12px;
    --maxw: 1080px;
    --font: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
    color-scheme: light;
}

/* tmavá téma – automaticky podľa systému (ak si používateľ nezvolil svetlú) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --brand-blue: #4a93d1;
        --brand-blue-dark: #6aa8dc;
        --brand-green: #37b24d;
        --brand-green-dark: #2e9e43;
        --ink: #e6edf3;
        --muted: #9fb0c0;
        --line: #24303c;
        --bg: #0f1720;
        --bg-soft: #131e29;
        --surface: #16212d;
        --tag-muted-bg: #22303c;
        --logo-pad: 8px 12px;
        --logo-bg: rgba(255, 255, 255, 0.94);
        --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
        color-scheme: dark;
    }
}

/* tmavá téma – manuálna voľba (má prednosť pred systémom) */
:root[data-theme="dark"] {
    --brand-blue: #4a93d1;
    --brand-blue-dark: #6aa8dc;
    --brand-green: #37b24d;
    --brand-green-dark: #2e9e43;
    --ink: #e6edf3;
    --muted: #9fb0c0;
    --line: #24303c;
    --bg: #0f1720;
    --bg-soft: #131e29;
    --surface: #16212d;
    --tag-muted-bg: #22303c;
    --logo-pad: 8px 12px;
    --logo-bg: rgba(255, 255, 255, 0.94);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
    color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
    font-family: var(--font);
    color: var(--ink);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background .2s ease, color .2s ease;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand-blue); }

/* ---- header ---- */
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 18px 16px;
}
.brand img {
    height: 44px;
    width: auto;
    background: var(--logo-bg);
    padding: var(--logo-pad);
    border-radius: 10px;
}
.site-nav { display: flex; align-items: center; gap: 10px; }

/* ---- prepínač témy ---- */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 999px;
    border: 2px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
    transition: border-color .15s ease, background .15s ease;
}
.theme-toggle:hover { border-color: var(--brand-blue); }
.theme-toggle svg { width: 20px; height: 20px; display: block; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
    :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

/* ---- buttons ---- */
.btn {
    display: inline-block;
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    transition: transform .05s ease, background .15s ease, color .15s ease;
    cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brand-blue); color: #fff; }
.btn-primary:hover { background: var(--brand-blue-dark); }
.btn-outline { border-color: var(--brand-blue); color: var(--brand-blue); background: transparent; }
.btn-outline:hover { background: var(--brand-blue); color: #fff; }
.btn-ghost { color: var(--brand-blue); background: transparent; }
.btn-ghost:hover { color: var(--brand-blue-dark); }

/* ---- pruh prostredia (len staging) ---- */
.env-banner { background: #c62828; color: #fff; font-weight: 700; text-align: center; padding: 6px 12px; font-size: .9rem; }

/* ---- prepínač dashboardov (účet s viacerými rolami) ---- */
.dash-switch { display: inline-flex; gap: 2px; padding: 2px; border: 1px solid var(--brand-blue); border-radius: 999px; }
.dash-switch .btn-ghost.is-active { background: var(--brand-blue); color: #fff; }
.join-link { width: 100%; max-width: 560px; font-family: monospace; }
.req-form { display: grid; gap: 10px; max-width: 560px; }
.req-form label { display: grid; gap: 4px; }
.req-form textarea, .req-form input[type="text"] { width: 100%; }
.role-check { display: inline-flex; align-items: center; gap: 4px; font-size: .85rem; white-space: nowrap; }

/* ---- hero ---- */
.hero {
    background: linear-gradient(180deg, var(--bg-soft), var(--bg));
    border-bottom: 1px solid var(--line);
}
.hero-inner { max-width: 780px; margin: 0 auto; padding: 56px 16px 64px; text-align: center; }
.hero-logo {
    width: min(420px, 82%);
    margin: 0 auto 28px;
    background: var(--logo-bg);
    padding: var(--logo-pad);
    border-radius: 14px;
}
.hero-title { font-size: clamp(1.7rem, 4.5vw, 2.6rem); line-height: 1.15; margin: 0 0 14px; color: var(--brand-blue); }
.hero-lead { font-size: 1.12rem; color: var(--muted); margin: 0 auto 28px; max-width: 620px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---- products ---- */
.products { max-width: var(--maxw); margin: 0 auto; padding: 56px 16px 72px; }
.section-title { font-size: 1.5rem; text-align: center; margin: 0 0 28px; color: var(--ink); }
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    max-width: 780px;
    margin: 0 auto;
}
.product-card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
    background: var(--surface);
    box-shadow: var(--shadow);
}
.product-card h3 { margin: 10px 0 8px; color: var(--brand-blue); font-size: 1.2rem; }
.product-card p { margin: 0; color: var(--muted); }
.product-card--available { border-top: 4px solid var(--brand-green); }
.product-tag {
    display: inline-block;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .02em;
    text-transform: uppercase;
    color: var(--brand-green-dark);
    background: rgba(46, 158, 67, 0.14);
    padding: 4px 10px;
    border-radius: 999px;
}
.product-tag--muted { color: var(--muted); background: var(--tag-muted-bg); }

/* ---- auth (formuláre) ---- */
.auth { max-width: 460px; margin: 0 auto; padding: 48px 16px 64px; }
.auth-card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
    padding: 28px;
}
.auth-card h1 { margin: 0 0 18px; color: var(--brand-blue); font-size: 1.5rem; }
.auth-card form { display: flex; flex-direction: column; gap: 14px; }
.auth-card label { display: flex; flex-direction: column; gap: 6px; font-weight: 600; color: var(--ink); }
.auth-card .hint { font-weight: 400; color: var(--muted); font-size: .85rem; }
.auth-card input {
    padding: 11px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--bg);
    color: var(--ink);
    font: inherit;
}
.auth-card input:focus { outline: 2px solid var(--brand-blue); border-color: var(--brand-blue); }
.auth-card .btn { margin-top: 6px; text-align: center; }
.auth-alt { margin: 16px 0 0; color: var(--muted); text-align: center; }
.auth-lead-sm { color: var(--muted); margin: 0 0 16px; }
.checkbox { flex-direction: row !important; align-items: center; gap: 8px !important; font-weight: 400 !important; }
.checkbox input { width: auto; }
.nav-user { color: var(--muted); font-size: .9rem; max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.logout-form { display: inline; margin: 0; }
.alert { padding: 10px 12px; border-radius: 8px; margin: 0 0 16px; }
.alert-error { background: rgba(182, 5, 5, 0.10); color: #b60505; border: 1px solid rgba(182, 5, 5, 0.25); }
.alert-success { background: rgba(46, 158, 67, 0.12); color: var(--brand-green-dark); border: 1px solid rgba(46, 158, 67, 0.3); }

/* ---- admin / účet ---- */
.admin { max-width: var(--maxw); margin: 0 auto; padding: 40px 16px 64px; }
.admin h1 { color: var(--brand-blue); margin: 0 0 16px; }
.card-row { display: flex; gap: 16px; flex-wrap: wrap; margin: 18px 0; }
.stat { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 16px 20px; color: var(--muted); box-shadow: var(--shadow); }
.stat .num { display: block; font-size: 1.8rem; font-weight: 700; color: var(--ink); }
.tbl { width: 100%; border-collapse: collapse; margin-top: 12px; }
.tbl th, .tbl td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.tbl th { color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .02em; }
.tbl select { padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); }
.inline { display: inline-flex; gap: 6px; align-items: center; margin: 2px 8px 2px 0; }
.btn-sm { padding: 6px 12px; font-size: .85rem; }
.badge { display: inline-block; font-size: .72rem; background: var(--brand-green); color: #fff; padding: 1px 7px; border-radius: 999px; vertical-align: middle; }

/* ---- účet klienta: platobné údaje ---- */
.pay-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; margin: 0 0 8px; }
.pay-box { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 6px 14px; margin: 0; padding: 18px 20px; border: 1px solid var(--line); border-left: 4px solid #d97706; border-radius: var(--radius); background: var(--surface); }
.pay-box dt { color: var(--muted); font-size: .9rem; }
.pay-box dd { margin: 0; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.pay-box .pay-sum { font-size: 1.4rem; font-weight: 700; color: var(--ink); line-height: 1.2; }
.pay-box .pay-strong { font-weight: 700; letter-spacing: .02em; }

/* ---- účet klienta: stiahnutie programu ---- */
.dl-card { margin: 8px 0 24px; padding: 20px 22px; border: 1px solid var(--line); border-left: 4px solid var(--brand-green); border-radius: var(--radius); background: var(--surface); }
.dl-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 12px 20px; }
.dl-head h2 { margin: 0 0 2px; color: var(--brand-blue); font-size: 1.25rem; }
.dl-head .auth-lead-sm { margin: 0; }
.dl-meta { color: var(--muted); font-size: .92rem; margin: 10px 0; }
.dl-steps { margin: 6px 0 0; padding-left: 1.3em; display: grid; gap: 8px; max-width: 72ch; }
.dl-steps code { font-size: .9em; background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; }

/* ---- utility ---- */
.mt-24 { margin-top: 24px; }

/* ---- klientsky dashboard ---- */
.acc-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.pill { display: inline-block; font-size: .78rem; padding: 2px 10px; border-radius: 999px; background: var(--tag-muted-bg); color: var(--muted); white-space: nowrap; }
.pill-ok { background: rgba(46, 158, 67, 0.15); color: var(--brand-green-dark); }
.pill-off { background: rgba(197, 48, 48, 0.15); color: #c53030; }

/* ---- produkty (admin) ---- */
.prod-title { color: var(--brand-blue); margin: 24px 0 4px; }
.pkg-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 12px 0; }
.pkg { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 16px; box-shadow: var(--shadow); }
.pkg-head strong { color: var(--brand-blue); }
.pkg-features { color: var(--muted); font-size: .88rem; margin: 6px 0 12px; }
.pkg-fields { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.pkg-fields label { display: flex; justify-content: space-between; align-items: center; gap: 10px; font-size: .9rem; color: var(--muted); }
.pkg-fields input[type="text"], .pkg-fields input[type="number"] { width: 90px; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); }
.pkg .price { font-size: 1.5rem; font-weight: 700; color: var(--brand-green-dark); margin: 6px 0; }
.pkg .btn { margin-top: 10px; }

/* ---- footer ---- */
.site-footer { border-top: 1px solid var(--line); color: var(--muted); padding: 40px 16px 28px; font-size: .92rem; background: var(--bg-soft); }
.footer-inner {
    max-width: var(--maxw);
    margin: 0 auto 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}
.footer-col strong { color: var(--ink); display: block; margin-bottom: 8px; }
.footer-col p { margin: 0; }
.footer-col a { color: var(--brand-blue); text-decoration: none; }
.footer-col a:hover { text-decoration: underline; }
.footer-note { max-width: var(--maxw); margin: 0 auto 12px; text-align: center; font-size: .84rem; opacity: .85; }
.footer-copy { max-width: var(--maxw); margin: 0 auto; text-align: center; }

@media (max-width: 520px) {
    .hero-inner { padding: 40px 16px 48px; }
    .btn { width: 100%; text-align: center; }
    .hero-actions { flex-direction: column; }
}