/* Reset a základné štýly */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* Kontajner */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Navigácia */
.nav {
    background: #2c3e50;
    color: white;
    padding: 15px 0;
    margin-bottom: 30px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav a {
    color: white;
    text-decoration: none;
    margin-right: 20px;
    padding: 8px 15px;
    border-radius: 4px;
    transition: background 0.3s;
}

.nav a:hover {
    background: #34495e;
}

/* Karty */
.card {
    background: white;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Nadpisy */
h1, h2, h3 {
    margin-bottom: 20px;
    color: #2c3e50;
}

h1 {
    font-size: 28px;
}

h2 {
    font-size: 22px;
}

h3 {
    font-size: 18px;
}

/* Formuláre */
.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #555;
}

input, select, textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #3498db;
}

/* Tlačidlá */
.btn {
    background: #3498db;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    background: #2980b9;
}

.btn-danger {
    background: #e74c3c;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-success {
    background: #27ae60;
}

.btn-success:hover {
    background: #229954;
}

.btn-small {
    padding: 5px 10px;
    font-size: 12px;
}

/* Tabuľky */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

tr:hover {
    background: #f8f9fa;
}

/* Alerty */
.alert {
    padding: 12px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Štatistiky */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    color: #3498db;
}

.stat-label {
    color: #7f8c8d;
    margin-top: 5px;
}

/* Grid rozloženie */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 20px;
}

/* Log monitor */
.log-container {
    background: #1e1e1e;
    border-radius: 8px;
    padding: 20px;
    max-height: 500px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 13px;
}

.log-entry {
    padding: 8px;
    margin-bottom: 5px;
    border-left: 3px solid #555;
    background: #2a2a2a;
    border-radius: 3px;
}

.log-entry.success {
    border-left-color: #27ae60;
    background: #1a2f1a;
}

.log-entry.error {
    border-left-color: #e74c3c;
    background: #2f1a1a;
}

.log-time {
    color: #95a5a6;
    font-size: 11px;
}

.log-device {
    color: #3498db;
    font-weight: bold;
}

.log-message {
    color: #ecf0f1;
}

.log-values {
    color: #f39c12;
    margin-left: 10px;
}

/* Prázdny stav */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #7f8c8d;
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 10px;
    opacity: 0.5;
}

/* Code bloky */
code {
    background: #f8f9fa;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
}

pre {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 4px;
    overflow-x: auto;
}

/* Utility triedy */
.text-center {
    text-align: center;
}

.text-muted {
    color: #7f8c8d;
}

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }

.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.ml-1 { margin-left: 10px; }
.mr-1 { margin-right: 10px; }

/* Responzívny dizajn */
@media (max-width: 768px) {
    .nav .container {
        flex-direction: column;
        gap: 10px;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }
    
    table {
        font-size: 12px;
    }
    
    th, td {
        padding: 8px;
    }
}

/* Scrollbar pre log */
.log-container::-webkit-scrollbar {
    width: 8px;
}

.log-container::-webkit-scrollbar-track {
    background: #1e1e1e;
}

.log-container::-webkit-scrollbar-thumb {
    background: #555;
    border-radius: 4px;
}

.log-container::-webkit-scrollbar-thumb:hover {
    background: #777;
}

/* Auto-refresh indikátor */
.auto-refresh {
    display: inline-block;
    padding: 5px 10px;
    background: #27ae60;
    color: white;
    border-radius: 4px;
    font-size: 12px;
    margin-left: 10px;
}

.auto-refresh.paused {
    background: #95a5a6;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-error {
    background: #f8d7da;
    color: #721c24;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

/* Admin badge */
.badge-admin {
    display: inline-block;
    padding: 2px 8px;
    background: #e74c3c;
    color: white;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-left: 5px;
}