.audio-toggle {
    position: fixed;
    top: 2.5rem;
    right: 2.5rem;
    background: var(--btn-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    cursor: none !important;
    opacity: 0;
    pointer-events: none;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
    overflow: hidden;
}

    .audio-toggle::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 50%;
        height: 100%;
        background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(186, 230, 253, 0.15) 50%, rgba(255,255,255,0) 100%);
        transform: skewX(-25deg);
        transition: left 0.7s ease;
        z-index: 1;
    }

body.is-initiated .audio-toggle {
    animation: pillReveal 1.2s cubic-bezier(0.16, 1, 0.3, 1) 2.9s forwards;
    pointer-events: auto;
}

.audio-toggle:hover {
    background: rgba(30, 30, 35, 0.85);
    border-color: rgba(186, 230, 253, 0.3);
    box-shadow: 0 15px 25px rgba(0,0,0,0.3), 0 0 15px rgba(186, 230, 253, 0.1);
    transform: translateY(-2px) scale(1.05);
}

.audio-toggle:active {
    transform: translateY(2px) scale(0.95);
}

.audio-toggle:hover::before {
    left: 200%;
}

/* --- SVG Speaker Icon Styling --- */
.speaker-icon {
    width: 20px;
    height: 20px;
    stroke: var(--text-muted);
    position: relative;
    z-index: 2;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), stroke 0.3s ease, filter 0.3s ease;
}

.audio-toggle:hover .speaker-icon {
    stroke: var(--text-main);
    transform: scale(1.1);
}

.speaker-waves {
    transition: opacity 0.3s ease, transform 0.3s ease;
    transform-origin: left center;
}

.speaker-slash {
    stroke-dasharray: 35;
    stroke-dashoffset: 35;
    transition: stroke-dashoffset 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    stroke: var(--text-main);
}

body.is-initiated .audio-toggle:not(.muted) .speaker-icon {
    stroke: var(--accent-glow);
    filter: drop-shadow(0 0 8px rgba(186, 230, 253, 0.6));
}

.audio-toggle.muted .speaker-waves {
    opacity: 0;
    transform: scale(0.5);
}

.audio-toggle.muted .speaker-slash {
    stroke-dashoffset: 0;
}

.audio-toggle.muted .speaker-icon {
    stroke: rgba(255, 255, 255, 0.4);
    filter: none;
}