.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.75rem;
    background-color: #7c3aed;
    color: #fff;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    transition: background-color 0.2s, opacity 0.2s;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
    text-decoration: none;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: #5b21b6;
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.75rem;
    background-color: #fff;
    border: 1px solid #cbd5e1;
    color: #1e293b;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    transition: background-color 0.2s, opacity 0.2s;
    text-decoration: none;
    cursor: pointer;
}

.btn-secondary:hover {
    background-color: #f8fafc;
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.75rem;
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    font-weight: 500;
    transition: background-color 0.2s;
    cursor: pointer;
}

.btn-danger:hover {
    background-color: #fee2e2;
}

.alert-success {
    border: 1px solid #a7f3d0;
    background-color: #ecfdf5;
    color: #065f46;
}

.alert-error {
    border: 1px solid #fecaca;
    background-color: #fef2f2;
    color: #991b1b;
}

input[type="range"] {
    height: 0.5rem;
    accent-color: #7c3aed;
}

audio {
    border-radius: 0.75rem;
}

@media (max-width: 640px) {
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
}