body {
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
}

/* Obecné styly pro tlačítka */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
}

/* Flash zprávy */
.flash-messages {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    width: 80%;
    max-width: 500px;
}

.flash-message {
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 5px;
    text-align: center;
    animation: fadeOut 5s forwards;
}

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

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

@keyframes fadeOut {
    0% { opacity: 1; }
    70% { opacity: 1; }
    100% { opacity: 0; }
}