.Simko0-header {
    padding: 12px 0 0 0;
    transition: background-color var(--transition), border-color var(--transition);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    overflow: hidden;
}
.Simko0-particles-header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}
.Simko0-particles-header canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}
.Simko0-logo {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    padding-bottom: 8px;
    height: 100%;
    min-height: 50px;
    cursor: default;
}
.Simko0-header-right {
    position: relative;
    z-index: 1;
    text-align: right;
    padding-right: 30px;
}
.Simko0-theme-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-round);
    transition: background-color var(--transition), transform var(--transition-fast), box-shadow var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--text-primary);
    box-shadow: 0 2px 12px var(--shadow-light);
}
.Simko0-theme-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 20px var(--shadow-light);
}
.Simko0-theme-btn:active {
    transform: scale(0.95);
}
.Simko0-theme-icon {
    width: 20px;
    height: 20px;
    fill: var(--bg-primary);
    transition: fill var(--transition);
}
@media (max-width: 576px) {
    .Simko0-logo {
        min-height: 40px;
    }
    .Simko0-theme-btn {
        width: 38px;
        height: 38px;
    }
    .Simko0-theme-icon {
        width: 18px;
        height: 18px;
    }
    .Simko0-header-right {
        padding-right: 20px;
    }
}