/* --- CSS Proměnné (Light Mode - výchozí) --- */
:root {
    --bg-color: #f4f4f9;
    --container-bg: #ffffff;
    --text-color: #333333;
    --border-color: #cccccc;
    --table-header-bg: #f8f9fa;
    --table-border: #dddddd;
    --input-bg: #ffffff;
    --input-text: #000000;
    --readonly-bg: #e9ecef;
    --readonly-text: #495057;
    --link-color: #0056b3;
    --btn-primary: #0056b3;
    --btn-primary-hover: #004494;
    --btn-success: #28a745;
    --btn-success-hover: #218838;
    --btn-danger: #dc3545;
    --btn-danger-hover: #c82333;
}

/* --- CSS Proměnné (Dark Mode - podle zařízení) --- */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --container-bg: #1e1e1e;
        --text-color: #e0e0e0;
        --border-color: #444444;
        --table-header-bg: #2c2c2c;
        --table-border: #333333;
        --input-bg: #2c2c2c;
        --input-text: #ffffff;
        --readonly-bg: #333333;
        --readonly-text: #888888;
        --link-color: #66b0ff;
        --btn-primary: #375a7f;
        --btn-primary-hover: #2b4764;
        --btn-success: #00bc8c;
        --btn-success-hover: #009670;
        --btn-danger: #e74c3c;
        --btn-danger-hover: #b93d30;
    }
}

/* --- Základní rozložení --- */
body {
    font-family: sans-serif;
    margin: 0;
    padding: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
    box-sizing: border-box;
}

h1, h2 { color: var(--text-color); margin-top: 0; }

.container {
    max-width: 650px;
    margin: 0 auto;
    background: var(--container-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.login-box {
    max-width: 350px;
    margin: 10vh auto;
    background: var(--container-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.login-box h2 { text-align: center; }

/* --- Formuláře --- */
.form-group { margin-bottom: 15px; }
label { display: block; margin-bottom: 5px; font-weight: bold; }

input[type="text"], 
input[type="number"], 
input[type="date"], 
input[type="password"], 
select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
    background-color: var(--input-bg);
    color: var(--input-text);
}

input[readonly] {
    background-color: var(--readonly-bg);
    color: var(--readonly-text);
}

/* --- Tlačítka --- */
button,
.btn-primary,
a.btn-primary {
    display: inline-block;
    width: 100%;
    padding: 12px;
    background-color: var(--btn-primary);
    color: #ffffff !important;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    box-sizing: border-box;
}
button:hover,
.btn-primary:hover,
a.btn-primary:hover {
    background-color: var(--btn-primary-hover);
    color: #ffffff !important;
}

.btn-success,
a.btn-success {
    background-color: var(--btn-success);
    color: #ffffff !important;
    text-decoration: none;
    box-sizing: border-box;
}
.btn-success:hover,
a.btn-success:hover {
    background-color: var(--btn-success-hover);
    color: #ffffff !important;
}

.btn-danger,
a.btn-danger {
    background-color: var(--btn-danger);
    color: #ffffff !important;
    padding: 6px 10px;
    font-size: 12px;
    width: auto;
    margin: 0;
    text-decoration: none;
    box-sizing: border-box;
}
.btn-danger:hover,
a.btn-danger:hover {
    background-color: var(--btn-danger-hover);
    color: #ffffff !important;
}

.btn-secondary,
a.btn-secondary {
    background-color: var(--readonly-bg);
    color: var(--text-color) !important;
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    display: inline-block;
    box-sizing: border-box;
}
.btn-secondary:hover,
a.btn-secondary:hover {
    background-color: var(--border-color);
    color: var(--text-color) !important;
}

/* --- Responzivní tabulka --- */
/* Zabrání přetečení na telefonech tím, že přidá horizontální scrollbar pouze tabulce */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: 15px;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 450px; /* Vynutí scroll na velmi úzkých displejích */
}

th, td {
    padding: 10px;
    border-bottom: 1px solid var(--table-border);
    text-align: left;
}
th { background-color: var(--table-header-bg); }

/* --- Ostatní komponenty --- */
.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap; /* Umožní zalomení na mobilu */
    gap: 10px;
}

.error {
    color: var(--btn-danger);
    font-weight: bold;
    margin-bottom: 15px;
    text-align: center;
}

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

.btn-secondary {
    display: inline-block;
    padding: 10px 16px;
    background-color: var(--readonly-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    text-align: center;
    cursor: pointer;
    font-size: 15px;
    text-decoration: none;
    box-sizing: border-box;
}
.btn-secondary:hover {
    background-color: var(--border-color);
    text-decoration: none;
}

.card {
    background-color: var(--container-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 16px;
    margin-bottom: 20px;
}

.generator-header-card {
    background-color: var(--readonly-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 20px;
}

.badge {
    display: inline-block;
    padding: 4px 8px;
    font-size: 12px;
    font-weight: bold;
    border-radius: 4px;
    background-color: var(--table-header-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.access-denied-box {
    text-align: center;
    padding: 30px 20px;
    border-radius: 8px;
    border: 2px solid var(--btn-danger);
    background-color: var(--container-bg);
    margin-top: 20px;
}

.access-denied-icon {
    font-size: 48px;
    margin-bottom: 15px;
    display: block;
}

/* Printable sticker styles */
.sticker-container {
    max-width: 400px;
    margin: 20px auto;
    border: 3px solid #000;
    border-radius: 8px;
    padding: 20px;
    background: #fff;
    color: #000;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.sticker-header {
    border-bottom: 2px solid #000;
    padding-bottom: 10px;
    margin-bottom: 15px;
}

.sticker-title {
    font-size: 20px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 0 5px 0;
}

.sticker-qr {
    margin: 15px auto;
    display: block;
    width: 200px;
    height: 200px;
}

.sticker-instructions {
    font-size: 12px;
    line-height: 1.4;
    border-top: 1px dashed #666;
    padding-top: 10px;
    margin-top: 12px;
    color: #333;
}

@media print {
    body {
        background: #fff !important;
        color: #000 !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    .no-print {
        display: none !important;
    }
    .sticker-container {
        border: 2px solid #000 !important;
        box-shadow: none !important;
        max-width: 100% !important;
        width: 320px !important;
        margin: 10px auto !important;
        page-break-inside: avoid;
    }
}