#app {
    width: 90%;
    max-width: 1000px;
    background-color: var(--panel-bg-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--shadow-color);
    overflow: visible;
    transition: background-color 0.3s;
}

header {
    background-color: #000000;
    color: var(--text-color-inverted);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    transition: background-color 0.3s;
    position: relative;
    z-index: 100;
}

.logo-header {
    height: 40px;
    object-fit: contain;
    flex-grow: 1;
    margin-bottom: 10px;
}

@media (min-width: 768px) {
    .logo-header {
        height: 50px;
        flex-grow: 0;
        margin-right: 20px;
        margin-bottom: 0;
    }
}

header h1 {
    margin: 0;
    font-size: 1.8rem;
    flex-grow: 1;
    margin-bottom: 15px;
    text-align: center;
}

nav {
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

nav button {
    background-color: transparent;
    border: 1px solid #ffffff;
    color: #ffffff;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s, color 0.3s;
}

nav button:hover {
    background-color: #ffffff;
    color: #000000;
}

nav button.active {
    background-color: #ffffff;
    color: #000000;
    font-weight: bold;
}

#show-admin-panel {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: #ffffff;
}

#show-admin-panel:hover {
    background-color: var(--success-color-hover);
    border-color: var(--success-color-hover);
    color: #ffffff;
}

#logout-btn {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

#logout-btn:hover {
    background-color: var(--danger-color-hover);
    color: var(--text-color-inverted);
}

main {
    padding: 20px;
}

.panel {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.panel.active {
    display: block;
}

.panel h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color-light);
    padding-bottom: 10px;
    margin-top: 0;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}