.portal-theme-toggle {
    --theme-toggle-width: 58px;
    --theme-toggle-height: 32px;
    --theme-toggle-padding: 3px;
    --theme-toggle-thumb-size: 24px;
    --theme-toggle-bg: #ffffff;
    --theme-toggle-border: #dbe3ef;
    --theme-toggle-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
    --theme-toggle-thumb: #635bff;
    --theme-toggle-thumb-text: #ffffff;
    --theme-toggle-sun: #f59e0b;
    --theme-toggle-moon: #64748b;
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--theme-toggle-width);
    height: var(--theme-toggle-height);
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
}

.portal-theme-toggle:focus-visible {
    outline: none;
}

.portal-theme-toggle__track {
    position: relative;
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 999px;
    background: var(--theme-toggle-bg);
    border: 1px solid var(--theme-toggle-border);
    box-shadow: var(--theme-toggle-shadow);
    overflow: hidden;
    transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.portal-theme-toggle__icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.78rem;
    line-height: 1;
    font-weight: 700;
    z-index: 1;
    transition: opacity 0.2s ease, color 0.2s ease;
}

.portal-theme-toggle__icon--sun {
    left: 8px;
    color: var(--theme-toggle-sun);
    opacity: 0.95;
}

.portal-theme-toggle__icon--moon {
    right: 8px;
    color: var(--theme-toggle-moon);
    opacity: 0.65;
}

.portal-theme-toggle__thumb {
    position: absolute;
    top: var(--theme-toggle-padding);
    left: var(--theme-toggle-padding);
    width: var(--theme-toggle-thumb-size);
    height: var(--theme-toggle-thumb-size);
    border-radius: 50%;
    background: var(--theme-toggle-thumb);
    color: var(--theme-toggle-thumb-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 16px rgba(15, 23, 42, 0.18);
    transition: transform 0.24s ease, background-color 0.24s ease, color 0.24s ease;
    z-index: 2;
}

.portal-theme-toggle[data-theme="dark"] .portal-theme-toggle__thumb {
    transform: translateX(26px);
}

.portal-theme-toggle[data-theme="dark"] .portal-theme-toggle__icon--sun {
    opacity: 0.45;
}

.portal-theme-toggle[data-theme="dark"] .portal-theme-toggle__icon--moon {
    opacity: 1;
}

.portal-theme-toggle:hover .portal-theme-toggle__track {
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
}

.portal-theme-toggle__thumb-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
    line-height: 1;
    font-weight: 700;
}